T4977: Add Babel routing protocol support

This PR adds basic Babel routing protocol support using the implementation in
FRR.

Signed-off-by: Yuxiang Zhu <vfreex@gmail.com>

20 files changed, 875 insertions, 63 deletions

diff --git a/data/templates/frr/babeld.frr.j2 b/data/templates/frr/babeld.frr.j2
new file mode 100644
index 000000000..344a5f988
--- /dev/null
+++ b/data/templates/frr/babeld.frr.j2
@@ -0,0 +1,85 @@
+{% from 'frr/distribute_list_macro.j2' import render_distribute_list %}
+{% from 'frr/ipv6_distribute_list_macro.j2' import render_ipv6_distribute_list %}
+!
+{# Interface specific configuration #}
+{% if interface is vyos_defined %}
+{%     for iface, iface_config in interface.items() %}
+interface {{ iface }}
+{%         if iface_config.type is vyos_defined('wired') or iface_config.type is vyos_defined('wireless') %}
+ babel {{ iface_config.type }}
+{%         endif %}
+{%         if iface_config.split_horizon is vyos_defined("enable") %}
+ babel split-horizon
+{%         elif iface_config.split_horizon is vyos_defined("disable") %}
+ no babel split-horizon
+{%         endif %}
+{%         if iface_config.hello_interval is vyos_defined %}
+ babel hello-interval {{ iface_config.hello_interval }}
+{%         endif %}
+{%         if iface_config.update_interval is vyos_defined %}
+ babel update-interval {{ iface_config.update_interval }}
+{%         endif %}
+{%         if iface_config.rxcost is vyos_defined %}
+ babel rxcost {{ iface_config.rxcost }}
+{%         endif %}
+{%         if iface_config.rtt_decay is vyos_defined %}
+ babel rtt-decay {{ iface_config.rtt_decay }}
+{%         endif %}
+{%         if iface_config.rtt_min is vyos_defined %}
+ babel rtt-min {{ iface_config.rtt_min }}
+{%         endif %}
+{%         if iface_config.rtt_max is vyos_defined %}
+ babel rtt-max {{ iface_config.rtt_max }}
+{%         endif %}
+{%         if iface_config.max_rtt_penalty is vyos_defined %}
+ babel max-rtt-penalty {{ iface_config.max_rtt_penalty }}
+{%         endif %}
+{%         if iface_config.enable_timestamps is vyos_defined %}
+ babel enable-timestamps
+{%         endif %}
+{%         if iface_config.channel is vyos_defined %}
+ babel channel {{ iface_config.channel | replace("non-interfering", "noninterfering") }}
+{%         endif %}
+exit
+!
+{%     endfor %}
+{% endif %}
+!
+{# Babel configuration #}
+router babel
+{% if parameters.diversity is vyos_defined %}
+ babel diversity
+{% endif %}
+{% if parameters.diversity_factor is vyos_defined %}
+ babel diversity-factor {{ parameters.diversity_factor }}
+{% endif %}
+{% if parameters.resend_delay is vyos_defined %}
+ babel resend-delay {{ parameters.resend_delay }}
+{% endif %}
+{% if parameters.smoothing_half_life is vyos_defined %}
+ babel smoothing-half-life {{ parameters.smoothing_half_life }}
+{% endif %}
+{% if interface is vyos_defined %}
+{%     for iface, iface_config in interface.items() %}
+ network {{ iface }}
+{%     endfor %}
+{% endif %}
+{% if redistribute is vyos_defined %}
+{%     for address_family in redistribute %}
+{%         for protocol, protocol_config in redistribute[address_family].items() %}
+{%             if protocol is vyos_defined('ospfv3') %}
+{%                 set protocol = 'ospf6' %}
+{%             endif %}
+ redistribute {{ address_family }} {{ protocol }}
+{%         endfor %}
+{%     endfor %}
+{% endif %}
+{% if distribute_list.ipv4 is vyos_defined %}
+{{ render_distribute_list(distribute_list.ipv4) }}
+{% endif %}
+{% if distribute_list.ipv6 is vyos_defined %}
+{{ render_ipv6_distribute_list(distribute_list.ipv6) }}
+{% endif %}
+exit
+!
+end
diff --git a/data/templates/frr/daemons.frr.tmpl b/data/templates/frr/daemons.frr.tmpl
index df98e74d6..fdff9772a 100644
--- a/data/templates/frr/daemons.frr.tmpl
+++ b/data/templates/frr/daemons.frr.tmpl
@@ -9,7 +9,7 @@ pimd=no
 ldpd=yes
 nhrpd=no
 eigrpd=yes
-babeld=no
+babeld=yes
 sharpd=no
 pbrd=no
 bfdd=yes
@@ -51,4 +51,3 @@ bfdd_options="  --daemon -A 127.0.0.1"
 
 watchfrr_enable=no
 valgrind_enable=no
-
diff --git a/data/templates/frr/distribute_list_macro.j2 b/data/templates/frr/distribute_list_macro.j2
new file mode 100644
index 000000000..c10bf732d
--- /dev/null
+++ b/data/templates/frr/distribute_list_macro.j2
@@ -0,0 +1,30 @@
+{% macro render_distribute_list(distribute_list) %}
+{% if distribute_list.access_list.in is vyos_defined %}
+ distribute-list {{ distribute_list.access_list.in }} in
+{% endif %}
+{% if distribute_list.access_list.out is vyos_defined %}
+ distribute-list {{ distribute_list.access_list.out }} out
+{% endif %}
+{% if distribute_list.interface is vyos_defined %}
+{%     for interface, interface_config in distribute_list.interface.items() %}
+{%         if interface_config.access_list.in is vyos_defined %}
+ distribute-list {{ interface_config.access_list.in }} in {{ interface }}
+{%         endif %}
+{%         if interface_config.access_list.out is vyos_defined %}
+ distribute-list {{ interface_config.access_list.out }} out {{ interface }}
+{%         endif %}
+{%         if interface_config.prefix_list.in is vyos_defined %}
+ distribute-list prefix {{ interface_config.prefix_list.in }} in {{ interface }}
+{%         endif %}
+{%         if interface_config.prefix_list.out is vyos_defined %}
+ distribute-list prefix {{ interface_config.prefix_list.out }} out {{ interface }}
+{%         endif %}
+{%     endfor %}
+{% endif %}
+{% if distribute_list.prefix_list.in is vyos_defined %}
+ distribute-list prefix {{ distribute_list.prefix_list.in }} in
+{% endif %}
+{% if distribute_list.prefix_list.out is vyos_defined %}
+ distribute-list prefix {{ distribute_list.prefix_list.out }} out
+{% endif %}
+{% endmacro %}
diff --git a/data/templates/frr/ipv6_distribute_list_macro.j2 b/data/templates/frr/ipv6_distribute_list_macro.j2
new file mode 100644
index 000000000..c365fbdae
--- /dev/null
+++ b/data/templates/frr/ipv6_distribute_list_macro.j2
@@ -0,0 +1,30 @@
+{% macro render_ipv6_distribute_list(distribute_list) %}
+{% if distribute_list.access_list.in is vyos_defined %}
+ ipv6 distribute-list {{ distribute_list.access_list.in }} in
+{% endif %}
+{% if distribute_list.access_list.out is vyos_defined %}
+ ipv6 distribute-list {{ distribute_list.access_list.out }} out
+{% endif %}
+{% if distribute_list.interface is vyos_defined %}
+{%     for interface, interface_config in distribute_list.interface.items() %}
+{%         if interface_config.access_list.in is vyos_defined %}
+ ipv6 distribute-list {{ interface_config.access_list.in }} in {{ interface }}
+{%         endif %}
+{%         if interface_config.access_list.out is vyos_defined %}
+ ipv6 distribute-list {{ interface_config.access_list.out }} out {{ interface }}
+{%         endif %}
+{%         if interface_config.prefix_list.in is vyos_defined %}
+ ipv6 distribute-list prefix {{ interface_config.prefix_list.in }} in {{ interface }}
+{%         endif %}
+{%         if interface_config.prefix_list.out is vyos_defined %}
+ ipv6 distribute-list prefix {{ interface_config.prefix_list.out }} out {{ interface }}
+{%         endif %}
+{%     endfor %}
+{% endif %}
+{% if distribute_list.prefix_list.in is vyos_defined %}
+ ipv6 distribute-list prefix {{ distribute_list.prefix_list.in }} in
+{% endif %}
+{% if distribute_list.prefix_list.out is vyos_defined %}
+ ipv6 distribute-list prefix {{ distribute_list.prefix_list.out }} out
+{% endif %}
+{% endmacro %}
diff --git a/data/templates/frr/ripd.frr.j2 b/data/templates/frr/ripd.frr.j2
index e9e484cc2..1445bf97f 100644
--- a/data/templates/frr/ripd.frr.j2
+++ b/data/templates/frr/ripd.frr.j2
@@ -1,3 +1,4 @@
+{% from 'frr/distribute_list_macro.j2' import render_distribute_list %}
 {# RIP key-chain definition #}
 {% if interface is vyos_defined %}
 {%     for iface, iface_config in interface.items() %}
@@ -60,34 +61,7 @@ router rip
 {%     endfor %}
 {% endif %}
 {% if distribute_list is vyos_defined %}
-{%     if distribute_list.access_list.in is vyos_defined %}
- distribute-list {{ distribute_list.access_list.in }} in
-{%     endif %}
-{%     if distribute_list.access_list.out is vyos_defined %}
- distribute-list {{ distribute_list.access_list.out }} out
-{%     endif %}
-{%     if distribute_list.interface is vyos_defined %}
-{%         for interface, interface_config in distribute_list.interface.items() %}
-{%             if interface_config.access_list.in is vyos_defined %}
- distribute-list {{ interface_config.access_list.in }} in {{ interface }}
-{%             endif %}
-{%             if interface_config.access_list.out is vyos_defined %}
- distribute-list {{ interface_config.access_list.out }} out {{ interface }}
-{%             endif %}
-{%             if interface_config.prefix_list.in is vyos_defined %}
- distribute-list prefix {{ interface_config.prefix_list.in }} in {{ interface }}
-{%             endif %}
-{%             if interface_config.prefix_list.out is vyos_defined %}
- distribute-list prefix {{ interface_config.prefix_list.out }} out {{ interface }}
-{%             endif %}
-{%         endfor %}
-{%     endif %}
-{%     if distribute_list.prefix_list.in is vyos_defined %}
- distribute-list prefix {{ distribute_list.prefix_list.in }} in
-{%     endif %}
-{%     if distribute_list.prefix_list.out is vyos_defined %}
- distribute-list prefix {{ distribute_list.prefix_list.out }} out
-{%     endif %}
+{{ render_distribute_list(distribute_list) }}
 {% endif %}
 {% include 'frr/rip_ripng.frr.j2' %}
 {% if version is vyos_defined %}
diff --git a/data/templates/frr/ripngd.frr.j2 b/data/templates/frr/ripngd.frr.j2
index 7919b1bad..e857e9481 100644
--- a/data/templates/frr/ripngd.frr.j2
+++ b/data/templates/frr/ripngd.frr.j2
@@ -1,3 +1,4 @@
+{% from 'frr/ipv6_distribute_list_macro.j2' import render_ipv6_distribute_list %}
 {# Interface specific configuration #}
 {% if interface is vyos_defined %}
 {%     for iface, iface_config in interface.items() %}
@@ -19,34 +20,7 @@ router ripng
 {%     endfor %}
 {% endif %}
 {% if distribute_list is vyos_defined %}
-{%     if distribute_list.access_list.in is vyos_defined %}
- ipv6 distribute-list {{ distribute_list.access_list.in }} in
-{%     endif %}
-{%     if distribute_list.access_list.out is vyos_defined %}
- ipv6 distribute-list {{ distribute_list.access_list.out }} out
-{%     endif %}
-{%     if distribute_list.interface is vyos_defined %}
-{%         for interface, interface_config in distribute_list.interface.items() %}
-{%             if interface_config.access_list.in is vyos_defined %}
- ipv6 distribute-list {{ interface_config.access_list.in }} in {{ interface }}
-{%             endif %}
-{%             if interface_config.access_list.out is vyos_defined %}
- ipv6 distribute-list {{ interface_config.access_list.out }} out {{ interface }}
-{%             endif %}
-{%             if interface_config.prefix_list.in is vyos_defined %}
- ipv6 distribute-list prefix {{ interface_config.prefix_list.in }} in {{ interface }}
-{%             endif %}
-{%             if interface_config.prefix_list.out is vyos_defined %}
- ipv6 distribute-list prefix {{ interface_config.prefix_list.out }} out {{ interface }}
-{%             endif %}
-{%         endfor %}
-{%     endif %}
-{%     if distribute_list.prefix_list.in is vyos_defined %}
- ipv6 distribute-list prefix {{ distribute_list.prefix_list.in }} in
-{%     endif %}
-{%     if distribute_list.prefix_list.out is vyos_defined %}
- ipv6 distribute-list prefix {{ distribute_list.prefix_list.out }} out
-{%     endif %}
+{{ render_ipv6_distribute_list(distribute_list) }}
 {% endif %}
 {% include 'frr/rip_ripng.frr.j2' %}
 exit
diff --git a/interface-definitions/include/babel/interface.xml.i b/interface-definitions/include/babel/interface.xml.i
new file mode 100644
index 000000000..549e4909d
--- /dev/null
+++ b/interface-definitions/include/babel/interface.xml.i
@@ -0,0 +1,187 @@
+<!-- include start from babel/interface.xml.i -->
+<tagNode name="interface">
+  <properties>
+    <help>Interface name</help>
+    <completionHelp>
+      <script>${vyos_completion_dir}/list_interfaces.py</script>
+    </completionHelp>
+    <valueHelp>
+      <format>txt</format>
+      <description>Interface name</description>
+    </valueHelp>
+    <constraint>
+      #include <include/constraint/interface-name.xml.in>
+    </constraint>
+  </properties>
+  <children>
+    <leafNode name="type">
+      <properties>
+        <help>Interface type</help>
+        <completionHelp>
+          <list>auto wired wireless</list>
+        </completionHelp>
+        <valueHelp>
+          <format>auto</format>
+          <description>Automatically detect interface type</description>
+        </valueHelp>
+        <valueHelp>
+          <format>wired</format>
+          <description>Wired interface</description>
+        </valueHelp>
+        <valueHelp>
+          <format>wireless</format>
+          <description>Wireless interface</description>
+        </valueHelp>
+        <constraint>
+          <regex>(auto|wired|wireless)</regex>
+        </constraint>
+      </properties>
+      <defaultValue>auto</defaultValue>
+    </leafNode>
+    <leafNode name="split-horizon">
+      <properties>
+        <help>Split horizon parameters</help>
+        <completionHelp>
+          <list>default enable disable</list>
+        </completionHelp>
+        <valueHelp>
+          <format>default</format>
+          <description>Enable on wired interfaces, and disable on wireless interfaces</description>
+        </valueHelp>
+        <valueHelp>
+          <format>enable</format>
+          <description>Enable split horizon processing</description>
+        </valueHelp>
+        <valueHelp>
+          <format>disable</format>
+          <description>Disable split horizon processing</description>
+        </valueHelp>
+        <constraint>
+          <regex>(default|enable|disable)</regex>
+        </constraint>
+      </properties>
+      <defaultValue>default</defaultValue>
+    </leafNode>
+    <leafNode name="hello-interval">
+      <properties>
+        <help>Time between scheduled hellos</help>
+        <valueHelp>
+          <format>u32:20-655340</format>
+          <description>Milliseconds</description>
+        </valueHelp>
+        <constraint>
+          <validator name="numeric" argument="--range 20-655340"/>
+        </constraint>
+      </properties>
+      <defaultValue>4000</defaultValue>
+    </leafNode>
+    <leafNode name="update-interval">
+      <properties>
+        <help>Time between scheduled updates</help>
+        <valueHelp>
+          <format>u32:20-655340</format>
+          <description>Milliseconds</description>
+        </valueHelp>
+        <constraint>
+          <validator name="numeric" argument="--range 20-655340"/>
+        </constraint>
+      </properties>
+      <defaultValue>20000</defaultValue>
+    </leafNode>
+    <leafNode name="rxcost">
+      <properties>
+        <help>Base receive cost for this interface</help>
+        <valueHelp>
+          <format>u32:1-65534</format>
+          <description>Base receive cost</description>
+        </valueHelp>
+        <constraint>
+          <validator name="numeric" argument="--range 1-65534"/>
+        </constraint>
+      </properties>
+    </leafNode>
+    <leafNode name="rtt-decay">
+      <properties>
+        <help>Decay factor for exponential moving average of RTT samples</help>
+        <valueHelp>
+          <format>u32:1-256</format>
+          <description>Decay factor, in units of 1/256</description>
+        </valueHelp>
+        <constraint>
+          <validator name="numeric" argument="--range 1-256"/>
+        </constraint>
+      </properties>
+      <defaultValue>42</defaultValue>
+    </leafNode>
+    <leafNode name="rtt-min">
+      <properties>
+        <help>Minimum RTT</help>
+        <valueHelp>
+          <format>u32:1-65535</format>
+          <description>Milliseconds</description>
+        </valueHelp>
+        <constraint>
+          <validator name="numeric" argument="--range 1-65535"/>
+        </constraint>
+      </properties>
+      <defaultValue>10</defaultValue>
+    </leafNode>
+    <leafNode name="rtt-max">
+      <properties>
+        <help>Maximum RTT</help>
+        <valueHelp>
+          <format>u32:1-65535</format>
+          <description>Milliseconds</description>
+        </valueHelp>
+        <constraint>
+          <validator name="numeric" argument="--range 1-65535"/>
+        </constraint>
+      </properties>
+      <defaultValue>120</defaultValue>
+    </leafNode>
+    <leafNode name="max-rtt-penalty">
+      <properties>
+        <help>Maximum additional cost due to RTT</help>
+        <valueHelp>
+          <format>u32:0-65535</format>
+          <description>Milliseconds (0 to disable the use of RTT-based cost)</description>
+        </valueHelp>
+        <constraint>
+          <validator name="numeric" argument="--range 0-65535"/>
+        </constraint>
+      </properties>
+      <defaultValue>150</defaultValue>
+    </leafNode>
+    <leafNode name="enable-timestamps">
+      <properties>
+        <help>Enable timestamps with each Hello and IHU message in order to compute RTT values</help>
+        <valueless/>
+      </properties>
+    </leafNode>
+    <leafNode name="channel">
+      <properties>
+        <help>Channel number for diversity routing</help>
+        <completionHelp>
+          <list>interfering non-interfering</list>
+        </completionHelp>
+        <valueHelp>
+          <format>u32:1-254</format>
+          <description>Interfaces with a channel number interfere with interfering interfaces and interfaces with the same channel number</description>
+        </valueHelp>
+        <valueHelp>
+          <format>interfering</format>
+          <description>Interfering interfaces are assumed to interfere with all other channels except non-interfering channels</description>
+        </valueHelp>
+        <valueHelp>
+          <format>non-interfering</format>
+          <description>Non-interfering interfaces only interfere with themselves</description>
+        </valueHelp>
+        <constraint>
+          <validator name="numeric" argument="--range 1-254"/>
+          <regex>(interfering|non-interfering)</regex>
+        </constraint>
+      </properties>
+    </leafNode>
+  </children>
+</tagNode>
+<!-- include end -->
diff --git a/interface-definitions/include/bgp/protocol-common-config.xml.i b/interface-definitions/include/bgp/protocol-common-config.xml.i
index ec065347c..0d88c7b25 100644
--- a/interface-definitions/include/bgp/protocol-common-config.xml.i
+++ b/interface-definitions/include/bgp/protocol-common-config.xml.i
@@ -165,6 +165,14 @@
                 #include <include/bgp/afi-redistribute-metric-route-map.xml.i>
               </children>
             </node>
+            <node name="babel">
+              <properties>
+                <help>Redistribute Babel routes into BGP</help>
+              </properties>
+              <children>
+                #include <include/bgp/afi-redistribute-metric-route-map.xml.i>
+              </children>
+            </node>
             <node name="static">
               <properties>
                 <help>Redistribute static routes into BGP</help>
@@ -542,6 +550,14 @@
                 #include <include/bgp/afi-redistribute-metric-route-map.xml.i>
               </children>
             </node>
+            <node name="babel">
+              <properties>
+                <help>Redistribute Babel routes into BGP</help>
+              </properties>
+              <children>
+                #include <include/bgp/afi-redistribute-metric-route-map.xml.i>
+              </children>
+            </node>
             <node name="static">
               <properties>
                 <help>Redistribute static routes into BGP</help>
diff --git a/interface-definitions/include/eigrp/protocol-common-config.xml.i b/interface-definitions/include/eigrp/protocol-common-config.xml.i
index 147277102..30ddc5d11 100644
--- a/interface-definitions/include/eigrp/protocol-common-config.xml.i
+++ b/interface-definitions/include/eigrp/protocol-common-config.xml.i
@@ -87,6 +87,10 @@
       <description>Routing Information Protocol (RIP)</description>
     </valueHelp>
     <valueHelp>
+      <format>babel</format>
+      <description>Babel routing protocol (Babel)</description>
+    </valueHelp>
+    <valueHelp>
       <format>static</format>
       <description>Statically configured routes</description>
     </valueHelp>
@@ -98,7 +102,7 @@
       <list>bgp connected nhrp ospf rip static vnc</list>
     </completionHelp>
     <constraint>
-      <regex>(bgp|connected|nhrp|ospf|rip|static|vnc)</regex>
+      <regex>(bgp|connected|nhrp|ospf|rip|babel|static|vnc)</regex>
     </constraint>
     <multi/>
   </properties>
diff --git a/interface-definitions/include/isis/protocol-common-config.xml.i b/interface-definitions/include/isis/protocol-common-config.xml.i
index 42bda7a80..c44939528 100644
--- a/interface-definitions/include/isis/protocol-common-config.xml.i
+++ b/interface-definitions/include/isis/protocol-common-config.xml.i
@@ -394,6 +394,14 @@
             #include <include/isis/redistribute-level-1-2.xml.i>
           </children>
         </node>
+        <node name="babel">
+          <properties>
+            <help>Redistribute Babel routes into IS-IS</help>
+          </properties>
+          <children>
+            #include <include/isis/redistribute-level-1-2.xml.i>
+          </children>
+        </node>
         <node name="static">
           <properties>
             <help>Redistribute static routes into IS-IS</help>
@@ -449,6 +457,14 @@
             #include <include/isis/redistribute-level-1-2.xml.i>
           </children>
         </node>
+        <node name="babel">
+          <properties>
+            <help>Redistribute Babel routes into IS-IS</help>
+          </properties>
+          <children>
+            #include <include/isis/redistribute-level-1-2.xml.i>
+          </children>
+        </node>
         <node name="static">
           <properties>
             <help>Redistribute static routes into IS-IS</help>
@@ -670,4 +686,4 @@
   </children>
 </tagNode>
 #include <include/route-map.xml.i>
-<!-- include end -->
\ No newline at end of file
+<!-- include end -->
diff --git a/interface-definitions/include/ospf/protocol-common-config.xml.i b/interface-definitions/include/ospf/protocol-common-config.xml.i
index 06609c10e..16b346131 100644
--- a/interface-definitions/include/ospf/protocol-common-config.xml.i
+++ b/interface-definitions/include/ospf/protocol-common-config.xml.i
@@ -756,6 +756,16 @@
         #include <include/route-map.xml.i>
       </children>
     </node>
+    <node name="babel">
+      <properties>
+        <help>Redistribute Babel routes</help>
+      </properties>
+      <children>
+        #include <include/ospf/metric.xml.i>
+        #include <include/ospf/metric-type.xml.i>
+        #include <include/route-map.xml.i>
+      </children>
+    </node>
     <node name="static">
       <properties>
         <help>Redistribute statically configured routes</help>
diff --git a/interface-definitions/include/ospfv3/protocol-common-config.xml.i b/interface-definitions/include/ospfv3/protocol-common-config.xml.i
index c0aab912d..fd00af95e 100644
--- a/interface-definitions/include/ospfv3/protocol-common-config.xml.i
+++ b/interface-definitions/include/ospfv3/protocol-common-config.xml.i
@@ -238,6 +238,14 @@
         #include <include/route-map.xml.i>
       </children>
     </node>
+    <node name="babel">
+      <properties>
+        <help>Redistribute Babel routes</help>
+      </properties>
+      <children>
+        #include <include/route-map.xml.i>
+      </children>
+    </node>
     <node name="static">
       <properties>
         <help>Redistribute static routes</help>
diff --git a/interface-definitions/protocols-babel.xml.in b/interface-definitions/protocols-babel.xml.in
new file mode 100644
index 000000000..0ef833077
--- /dev/null
+++ b/interface-definitions/protocols-babel.xml.in
@@ -0,0 +1,254 @@
+<?xml version="1.0"?>
+<interfaceDefinition>
+  <node name="protocols">
+    <children>
+      <node name="babel" owner="${vyos_conf_scripts_dir}/protocols_babel.py">
+        <properties>
+          <help>Babel Routing Protocol</help>
+          <priority>650</priority>
+        </properties>
+        <children>
+          <node name="parameters">
+            <properties>
+              <help>Babel-specific parameters</help>
+            </properties>
+            <children>
+              <leafNode name="diversity">
+                <properties>
+                  <help>Enable diversity-aware routing</help>
+                  <valueless/>
+                </properties>
+              </leafNode>
+              <leafNode name="diversity-factor">
+                <properties>
+                  <help>Multiplicative factor used for diversity routing</help>
+                  <valueHelp>
+                    <format>u32:1-256</format>
+                    <description>Multiplicative factor, in units of 1/256</description>
+                  </valueHelp>
+                  <constraint>
+                    <validator name="numeric" argument="--range 1-256"/>
+                  </constraint>
+                </properties>
+                <defaultValue>256</defaultValue>
+              </leafNode>
+              <leafNode name="resend-delay">
+                <properties>
+                  <help>Time before resending a message</help>
+                  <valueHelp>
+                    <format>u32:20-655340</format>
+                    <description>Milliseconds</description>
+                  </valueHelp>
+                  <constraint>
+                    <validator name="numeric" argument="--range 20-655340"/>
+                  </constraint>
+                </properties>
+                <defaultValue>2000</defaultValue>
+              </leafNode>
+              <leafNode name="smoothing-half-life">
+                <properties>
+                  <help>Smoothing half-life</help>
+                  <valueHelp>
+                    <format>u32:0-65534</format>
+                    <description>Seconds</description>
+                  </valueHelp>
+                  <constraint>
+                    <validator name="numeric" argument="--range 0-65534"/>
+                  </constraint>
+                </properties>
+                <defaultValue>4</defaultValue>
+              </leafNode>
+            </children>
+          </node>
+          #include <include/babel/interface.xml.i>
+          <node name="redistribute">
+            <properties>
+              <help>Redistribute information from another routing protocol</help>
+            </properties>
+            <children>
+              <node name="ipv4">
+                <properties>
+                  <help>Redistribute IPv4 routes</help>
+                </properties>
+                <children>
+                  <leafNode name="bgp">
+                    <properties>
+                      <help>Redistribute BGP routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="connected">
+                    <properties>
+                      <help>Redistribute connected routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="eigrp">
+                    <properties>
+                      <help>Redistribute EIGRP routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="isis">
+                    <properties>
+                      <help>Redistribute IS-IS routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="kernel">
+                    <properties>
+                      <help>Redistribute kernel routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="nhrp">
+                    <properties>
+                      <help>Redistribute NHRP routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="ospf">
+                    <properties>
+                      <help>Redistribute OSPF routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="rip">
+                    <properties>
+                      <help>Redistribute RIP routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="static">
+                    <properties>
+                      <help>Redistribute static routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                </children>
+              </node>
+              <node name="ipv6">
+                <properties>
+                  <help>Redistribute IPv6 routes</help>
+                </properties>
+                <children>
+                  <leafNode name="bgp">
+                    <properties>
+                      <help>Redistribute BGP routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="connected">
+                    <properties>
+                      <help>Redistribute connected routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="isis">
+                    <properties>
+                      <help>Redistribute IS-IS routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="kernel">
+                    <properties>
+                      <help>Redistribute kernel routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="nhrp">
+                    <properties>
+                      <help>Redistribute NHRP routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="ospfv3">
+                    <properties>
+                      <help>Redistribute OSPFv3 routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="ripng">
+                    <properties>
+                      <help>Redistribute RIPng routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                  <leafNode name="static">
+                    <properties>
+                      <help>Redistribute static routes</help>
+                      <valueless/>
+                    </properties>
+                  </leafNode>
+                </children>
+              </node>
+            </children>
+          </node>
+          <node name="distribute-list">
+            <properties>
+              <help>Filter networks in routing updates</help>
+            </properties>
+            <children>
+              <node name="ipv4">
+                <properties>
+                  <help>Filter IPv4 routes</help>
+                </properties>
+                <children>
+                  #include <include/rip/access-list.xml.i>
+                  <tagNode name="interface">
+                    <properties>
+                      <help>Apply filtering to an interface</help>
+                      <valueHelp>
+                        <format>txt</format>
+                        <description>Apply filtering to an interface</description>
+                      </valueHelp>
+                      <completionHelp>
+                        <script>${vyos_completion_dir}/list_interfaces.py</script>
+                      </completionHelp>
+                      <constraint>
+                        #include <include/constraint/interface-name.xml.in>
+                      </constraint>
+                    </properties>
+                    <children>
+                      #include <include/rip/access-list.xml.i>
+                      #include <include/rip/prefix-list.xml.i>
+                    </children>
+                  </tagNode>
+                  #include <include/rip/prefix-list.xml.i>
+                </children>
+              </node>
+              <node name="ipv6">
+                <properties>
+                  <help>Filter IPv6 routes</help>
+                </properties>
+                <children>
+                  #include <include/rip/access-list6.xml.i>
+                  <tagNode name="interface">
+                    <properties>
+                      <help>Apply filtering to an interface</help>
+                      <valueHelp>
+                        <format>txt</format>
+                        <description>Apply filtering to an interface</description>
+                      </valueHelp>
+                      <completionHelp>
+                        <script>${vyos_completion_dir}/list_interfaces.py</script>
+                      </completionHelp>
+                      <constraint>
+                        #include <include/constraint/interface-name.xml.in>
+                      </constraint>
+                    </properties>
+                    <children>
+                      #include <include/rip/access-list6.xml.i>
+                      #include <include/rip/prefix-list6.xml.i>
+                    </children>
+                  </tagNode>
+                  #include <include/rip/prefix-list6.xml.i>
+                </children>
+              </node>
+            </children>
+          </node>
+        </children>
+      </node>
+    </children>
+  </node>
+</interfaceDefinition>
diff --git a/interface-definitions/protocols-rip.xml.in b/interface-definitions/protocols-rip.xml.in
index 33aae5015..b5d48090a 100644
--- a/interface-definitions/protocols-rip.xml.in
+++ b/interface-definitions/protocols-rip.xml.in
@@ -225,6 +225,14 @@
                   #include <include/rip/redistribute.xml.i>
                 </children>
               </node>
+              <node name="babel">
+                <properties>
+                  <help>Redistribute Babel routes</help>
+                </properties>
+                <children>
+                  #include <include/rip/redistribute.xml.i>
+                </children>
+              </node>
             </children>
           </node>
           <leafNode name="route">
@@ -248,4 +256,3 @@
     </children>
   </node>
 </interfaceDefinition>
-
diff --git a/interface-definitions/protocols-ripng.xml.in b/interface-definitions/protocols-ripng.xml.in
index cd35dbf53..cf000b824 100644
--- a/interface-definitions/protocols-ripng.xml.in
+++ b/interface-definitions/protocols-ripng.xml.in
@@ -123,6 +123,14 @@
                   #include <include/rip/redistribute.xml.i>
                 </children>
               </node>
+              <node name="babel">
+                <properties>
+                  <help>Redistribute Babel routes</help>
+                </properties>
+                <children>
+                  #include <include/rip/redistribute.xml.i>
+                </children>
+              </node>
             </children>
           </node>
           <leafNode name="route">
diff --git a/op-mode-definitions/restart-frr.xml.in b/op-mode-definitions/restart-frr.xml.in
index 4e2be1bf2..4572858b5 100644
--- a/op-mode-definitions/restart-frr.xml.in
+++ b/op-mode-definitions/restart-frr.xml.in
@@ -68,6 +68,12 @@
         </properties>
         <command>sudo ${vyos_op_scripts_dir}/restart_frr.py --action restart --daemon zebra</command>
       </leafNode>
+      <leafNode name="babel">
+        <properties>
+          <help>Restart Babel routing daemon</help>
+        </properties>
+        <command>sudo ${vyos_op_scripts_dir}/restart_frr.py --action restart --daemon babeld</command>
+      </leafNode>
     </children>
   </node>
 </interfaceDefinition>
diff --git a/op-mode-definitions/show-babel.xml.in b/op-mode-definitions/show-babel.xml.in
new file mode 100644
index 000000000..3aac3764e
--- /dev/null
+++ b/op-mode-definitions/show-babel.xml.in
@@ -0,0 +1,41 @@
+<?xml version="1.0"?>
+<interfaceDefinition>
+  <node name="show">
+    <children>
+      <node name="babel">
+        <properties>
+          <help>Show Babel routing protocol information</help>
+        </properties>
+        <children>
+          <leafNode name="interface">
+            <properties>
+              <help>Show Babel Interface information</help>
+            </properties>
+            <command>${vyos_op_scripts_dir}/vtysh_wrapper.sh $@</command>
+          </leafNode>
+          <leafNode name="neighbor">
+            <properties>
+              <help>Show Babel neighbor information</help>
+            </properties>
+            <command>${vyos_op_scripts_dir}/vtysh_wrapper.sh $@</command>
+          </leafNode>
+          <tagNode name="neighbor">
+            <properties>
+              <help>Show Babel neighbor information for specified interface</help>
+              <completionHelp>
+                <script>${vyos_completion_dir}/list_interfaces.py</script>
+              </completionHelp>
+            </properties>
+            <command>${vyos_op_scripts_dir}/vtysh_wrapper.sh $@</command>
+          </tagNode>
+          <leafNode name="route">
+            <properties>
+              <help>Show Babel route information</help>
+            </properties>
+            <command>${vyos_op_scripts_dir}/vtysh_wrapper.sh $@</command>
+          </leafNode>
+        </children>
+      </node>
+    </children>
+  </node>
+</interfaceDefinition>
diff --git a/python/vyos/frr.py b/python/vyos/frr.py
index ccb132dd5..a84f183ef 100644
--- a/python/vyos/frr.py
+++ b/python/vyos/frr.py
@@ -85,7 +85,7 @@ LOG.addHandler(ch2)
 
 _frr_daemons = ['zebra', 'bgpd', 'fabricd', 'isisd', 'ospf6d', 'ospfd', 'pbrd',
                 'pimd', 'ripd', 'ripngd', 'sharpd', 'staticd', 'vrrpd', 'ldpd',
-                'bfdd', 'eigrpd']
+                'bfdd', 'eigrpd', 'babeld']
 
 path_vtysh = '/usr/bin/vtysh'
 path_frr_reload = '/usr/lib/frr/frr-reload.py'
diff --git a/src/conf_mode/protocols_babel.py b/src/conf_mode/protocols_babel.py
new file mode 100755
index 000000000..20821c7f2
--- /dev/null
+++ b/src/conf_mode/protocols_babel.py
@@ -0,0 +1,163 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021-2023 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+
+from sys import exit
+
+from vyos.config import Config
+from vyos.configdict import dict_merge
+from vyos.configdict import node_changed
+from vyos.configverify import verify_common_route_maps
+from vyos.configverify import verify_access_list
+from vyos.configverify import verify_prefix_list
+from vyos.util import dict_search
+from vyos.xml import defaults
+from vyos.template import render_to_string
+from vyos import ConfigError
+from vyos import frr
+from vyos import airbag
+airbag.enable()
+
+def get_config(config=None):
+    if config:
+        conf = config
+    else:
+        conf = Config()
+    base = ['protocols', 'babel']
+    babel = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
+
+    # FRR has VRF support for different routing daemons. As interfaces belong
+    # to VRFs - or the global VRF, we need to check for changed interfaces so
+    # that they will be properly rendered for the FRR config. Also this eases
+    # removal of interfaces from the running configuration.
+    interfaces_removed = node_changed(conf, base + ['interface'])
+    if interfaces_removed:
+        babel['interface_removed'] = list(interfaces_removed)
+
+    # Bail out early if configuration tree does not exist
+    if not conf.exists(base):
+        babel.update({'deleted' : ''})
+        return babel
+
+    # We have gathered the dict representation of the CLI, but there are default
+    # options which we need to update into the dictionary retrived.
+    default_values = defaults(base)
+
+    # XXX: T2665: we currently have no nice way for defaults under tag nodes,
+    # clean them out and add them manually :(
+    del default_values['interface']
+
+    # merge in remaining default values
+    babel = dict_merge(default_values, babel)
+
+    # We also need some additional information from the config, prefix-lists
+    # and route-maps for instance. They will be used in verify().
+    #
+    # XXX: one MUST always call this without the key_mangling() option! See
+    # vyos.configverify.verify_common_route_maps() for more information.
+    tmp = conf.get_config_dict(['policy'])
+    # Merge policy dict into "regular" config dict
+    babel = dict_merge(tmp, babel)
+    return babel
+
+def verify(babel):
+    if not babel:
+        return None
+
+    # verify distribute_list
+    if "distribute_list" in babel:
+        acl_keys = {
+            "ipv4": [
+                "distribute_list.ipv4.access_list.in",
+                "distribute_list.ipv4.access_list.out",
+            ],
+            "ipv6": [
+                "distribute_list.ipv6.access_list.in",
+                "distribute_list.ipv6.access_list.out",
+            ]
+        }
+        prefix_list_keys = {
+            "ipv4": [
+                "distribute_list.ipv4.prefix_list.in",
+                "distribute_list.ipv4.prefix_list.out",
+            ],
+            "ipv6":[
+                "distribute_list.ipv6.prefix_list.in",
+                "distribute_list.ipv6.prefix_list.out",
+            ]
+        }
+        for address_family in ["ipv4", "ipv6"]:
+            for iface_key in babel["distribute_list"].get(address_family, {}).get("interface", {}).keys():
+                acl_keys[address_family].extend([
+                    f"distribute_list.{address_family}.interface.{iface_key}.access_list.in",
+                    f"distribute_list.{address_family}.interface.{iface_key}.access_list.out"
+                ])
+                prefix_list_keys[address_family].extend([
+                    f"distribute_list.{address_family}.interface.{iface_key}.prefix_list.in",
+                    f"distribute_list.{address_family}.interface.{iface_key}.prefix_list.out"
+                ])
+
+        for address_family, keys in acl_keys.items():
+            for key in keys:
+                acl = dict_search(key, babel)
+                if acl:
+                    verify_access_list(acl, babel, version='6' if address_family == 'ipv6' else '')
+
+        for address_family, keys in prefix_list_keys.items():
+            for key in keys:
+                prefix_list = dict_search(key, babel)
+                if prefix_list:
+                    verify_prefix_list(prefix_list, babel, version='6' if address_family == 'ipv6' else '')
+
+
+def generate(babel):
+    if not babel or 'deleted' in babel:
+        return None
+
+    babel['new_frr_config'] = render_to_string('frr/babeld.frr.j2', babel)
+    return None
+
+def apply(babel):
+    babel_daemon = 'babeld'
+
+    # Save original configuration prior to starting any commit actions
+    frr_cfg = frr.FRRConfig()
+
+    frr_cfg.load_configuration(babel_daemon)
+    frr_cfg.modify_section('^router babel', stop_pattern='^exit', remove_stop_mark=True)
+
+    for key in ['interface', 'interface_removed']:
+        if key not in babel:
+            continue
+        for interface in babel[key]:
+            frr_cfg.modify_section(f'^interface {interface}', stop_pattern='^exit', remove_stop_mark=True)
+
+    if 'new_frr_config' in babel:
+        frr_cfg.add_before(frr.default_add_before, babel['new_frr_config'])
+    frr_cfg.commit_configuration(babel_daemon)
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)
diff --git a/src/op_mode/restart_frr.py b/src/op_mode/restart_frr.py
index 91b25567a..680d9f8cc 100755
--- a/src/op_mode/restart_frr.py
+++ b/src/op_mode/restart_frr.py
@@ -139,7 +139,7 @@ def _reload_config(daemon):
 # define program arguments
 cmd_args_parser = argparse.ArgumentParser(description='restart frr daemons')
 cmd_args_parser.add_argument('--action', choices=['restart'], required=True, help='action to frr daemons')
-cmd_args_parser.add_argument('--daemon', choices=['bfdd', 'bgpd', 'ldpd', 'ospfd', 'ospf6d', 'isisd', 'ripd', 'ripngd', 'staticd', 'zebra'], required=False,  nargs='*', help='select single or multiple daemons')
+cmd_args_parser.add_argument('--daemon', choices=['bfdd', 'bgpd', 'ldpd', 'ospfd', 'ospf6d', 'isisd', 'ripd', 'ripngd', 'staticd', 'zebra', 'babeld'], required=False,  nargs='*', help='select single or multiple daemons')
 # parse arguments
 cmd_args = cmd_args_parser.parse_args()