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-rwxr-xr-xsrc/conf_mode/protocols_isis.py18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/conf_mode/protocols_isis.py b/src/conf_mode/protocols_isis.py
index 4aea59bfd..d1e71c378 100755
--- a/src/conf_mode/protocols_isis.py
+++ b/src/conf_mode/protocols_isis.py
@@ -24,9 +24,11 @@ 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_interface_exists
+from vyos.ifconfig import Interface
from vyos.util import dict_search
from vyos.util import get_interface_config
from vyos.template import render_to_string
+from vyos.xml import defaults
from vyos import ConfigError
from vyos import frr
from vyos import airbag
@@ -67,6 +69,15 @@ def get_config(config=None):
isis.update({'deleted' : ''})
return isis
+ # We have gathered the dict representation of the CLI, but there are default
+ # options which we need to update into the dictionary retrived.
+ # XXX: Note that we can not call defaults(base), as defaults does not work
+ # on an instance of a tag node. As we use the exact same CLI definition for
+ # both the non-vrf and vrf version this is absolutely safe!
+ default_values = defaults(base_path)
+ # merge in default values
+ isis = dict_merge(default_values, isis)
+
# We also need some additional information from the config, prefix-lists
# and route-maps for instance. They will be used in verify().
#
@@ -99,6 +110,13 @@ def verify(isis):
for interface in isis['interface']:
verify_interface_exists(interface)
+ # Interface MTU must be >= configured lsp-mtu
+ mtu = Interface(interface).get_mtu()
+ area_mtu = isis['lsp_mtu']
+ if mtu < int(area_mtu):
+ raise ConfigError(f'Interface {interface} has MTU {mtu}, minimum ' \
+ f'area MTU is {area_mtu}!')
+
if 'vrf' in isis:
# If interface specific options are set, we must ensure that the
# interface is bound to our requesting VRF. Due to the VyOS