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Found an odd behavior on Linux and the VyOS CLI implementation. If adding VXLAN
interfaces using iproute2 the MTU differs depending on the creation syntax:
ip -4 link add vxlan100 type vxlan dstport 4789 external df unset tos inherit \
ttl 16 nolearning vnifilter local 172.16.33.201
ip -4 link add vxlan200 type vxlan id 200 dstport 4789 local 172.16.33.201 dev eth0
ip -6 link add vxlan300 type vxlan id 300 dstport 4789 local 2001:db8:1::1 dev eth0
132: vxlan300: <BROADCAST,MULTICAST> mtu 1430 qdisc noop state DOWN group default qlen 1000
link/ether 4e:fb:e3:f5:d9:59 brd ff:ff:ff:ff:ff:ff
133: vxlan200: <BROADCAST,MULTICAST> mtu 1450 qdisc noop state DOWN group default qlen 1000
link/ether 0e:4e:f4:76:59:3f brd ff:ff:ff:ff:ff:ff
134: vxlan100: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether ba:b6:b7:0c:b1:37 brd ff:ff:ff:ff:ff:ff
VyOS always sets a default MTU of 1450 bytes which is correct for IPv4 p2p links
or multicast, but invalid for IPv6 p2p. Also this will break EVPN deployments
as ethernet bridges with MTU < 1500 bytes are less fun.
Increase default MTU to 1500 bytes. Migrate old configurations to use 1450
bytes if not specified otherwise on the CLI.
(cherry picked from commit 4a163b016333e58fee9d6ec6b53a09e0160b3213)
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In a service provider network a service provider typically supports multiple
bridge domains with overlapping vlans. One bridge domain per customer. Vlans in
each bridge domain are mapped to globally unique VXLAN VNI ranges assigned to
each customer.
Without the ability of VNI filtering, we can not provide VXLAN tunnels
with multiple tenants all requiring e.g. VLAN 10.
To Test:
set interfaces vxlan vxlan987 parameters external
set interfaces vxlan vxlan987 source-interface eth0
set interfaces vxlan vxlan987 parameters vni-filter
set interfaces vxlan vxlan987 vlan-to-vni 50 vni 10050
set interfaces vxlan vxlan987 vlan-to-vni 51 vni 10051
set interfaces vxlan vxlan987 vlan-to-vni 52 vni 10052
set interfaces vxlan vxlan987 vlan-to-vni 53 vni 10053
set interfaces vxlan vxlan987 vlan-to-vni 54 vni 10054
set interfaces vxlan vxlan987 vlan-to-vni 60 vni 10060
set interfaces vxlan vxlan987 vlan-to-vni 69 vni 10069
set interfaces bridge br0 member interface vxlan987
Add new op-mode command: show bridge vni
Interface VNI
----------- -----------
vxlan987 10050-10054
vxlan987 10060
vxlan987 10069
(cherry picked from commit 35f6033d21053fa420e837f157cd9377a4ccd26a)
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In order to minimize the flooding of ARP and ND messages in the VXLAN network,
EVPN includes provisions [1] that allow participating VTEPs to suppress such
messages in case they know the MAC-IP binding and can reply on behalf of the
remote host. In Linux, the above is implemented in the bridge driver using a
per-port option called "neigh_suppress" that was added in kernel version 4.15.
[1] https://www.rfc-editor.org/rfc/rfc7432#section-10
(cherry picked from commit ec9a95502daa88b9632af12524e7cefebf86bab6)
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As we have a bunch of options under "paramteres" already and "external" is
clearly one of them it should be migrated under that node as well.
(cherry picked from commit cc7ba8824a5e9ec818f0bbe7fb85e1713a591527)
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Currently VyOS VXLAN implementation uses the Linux assigned port 8472 that
predates the IANA assignment. As Most other vendors use the IANA assigned port,
follow this guideline and use the new default port 4789.
Existing configuration not defining an explicit port number will be migrated
to the old default port number of 8472, keeping existing configurations work!
(cherry picked from commit 6db8d3ded19f652b99231be0d705d76b598ac72a)
# Conflicts:
# interface-definitions/include/version/interfaces-version.xml.i
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FRR supports a new way of configuring VLAN-to-VNI mappings for EVPN-VXLAN, when
working with the Linux kernel. In this new way, the mapping of a VLAN to a VNI
is configured against a container VXLAN interface which is referred to as a
'Single VXLAN device (SVD)'.
Multiple VLAN to VNI mappings can be configured against the same SVD. This
allows for a significant scaling of the number of VNIs since a separate VXLAN
interface is no longer required for each VNI.
Sample configuration of SVD with VLAN to VNI mappings is shown below.
set interfaces bridge br0 member interface vxlan0
set interfaces vxlan vxlan0 external
set interfaces vxlan vxlan0 source-interface 'dum0'
set interfaces vxlan vxlan0 vlan-to-vni 10 vni '10010'
set interfaces vxlan vxlan0 vlan-to-vni 11 vni '10011'
set interfaces vxlan vxlan0 vlan-to-vni 30 vni '10030'
set interfaces vxlan vxlan0 vlan-to-vni 31 vni '10031'
(cherry picked from commit 7f6624f5a6f8bd1749b54103ea5ec9f010adf778)
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No need to have two distinct include blocks as one superseeds the other. Also
this makes the entire behavior of "description" CLI node simpler.
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<name> interface <ifname>`
* Include refactor to policy route to allow for deletion of mangle table instead of complex cleanup
* T4605: Rename mangle table to vyos_mangle
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firewall node
* Refactor firewall and zone-policy rule creation and cleanup
* Migrate interface firewall values to `firewall interfaces <name> <direction> name/ipv6-name <name>`
* Remove `firewall-interface.py` conf script
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set interfaces vxlan vxlan0 parameters ip df <set|unset|inherit>
set interfaces geneve gnv0 parameters ip df <set|unset|inherit>
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"set traffic-policy" now becomes "set qos policy"
"set interface ethernet eth0 traffic-policy" now bvecomes "set qos interface eth0"
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VXLAN does support using multiple remotes but VyOS does not. Add the ability
to set multiple remotes and add their flood lists using "bridge" command.
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* 'firewall' of https://github.com/sarthurdev/vyos-1x:
zone_policy: T3873: Implement intra-zone-filtering
policy: T2199: Migrate policy route op-mode to XML/Python
policy: T2199: Migrate policy route to XML/Python
zone-policy: T2199: Migrate zone-policy op-mode to XML/Python
zone-policy: T2199: Migrate zone-policy to XML/Python
firewall: T2199: Migrate firewall op-mode to XML/Python
firewall: T2199: Migrate firewall to XML/Python
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Background information [1]. Specifies whether an external control plane
(e.g. ip route encap/EVPN) or the internal FDB should be used.
[1]: https://legacy.netdevconf.info/2.2/slides/prabhu-linuxbridge-tutorial.pdf
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The group CLI node takes a multicast IPv4 or IPv6 address - this must be input
validated to not case any OS exception
cpo@LR1.wue3# show interfaces vxlan
vxlan vxlan0 {
+ group 254.0.0.1
source-address 172.18.254.201
+ source-interface dum0
vni 10
}
Results in OSError beeing rasied with the following context:
Error: argument "254.0.0.1" is wrong: invalid group address
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As the amount of include files now has reached a certain amount, it is getting
more and more crowsded, thuse introducing "per topic" subdirectories on the
filesystem to keep a clean structure makes sense.
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VyOS 1.2 had a default ttl of 16 hardcoded to the node.def file [1], so until
this is handled via a migration script we have to obey that particular
setting.
[1]: https://github.com/vyos/vyatta-cfg-system/blob/crux/templates/interfaces/vxlan/node.def#L23
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Streamline the CLI configuration where we try to use remote on other interfaces
like vxlan, geneve.
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A VXLAN tunnel may now get a TTL, TOS, Flowlabel option specified. It is also
possible to disable learning of unknown addresses into the forwarding database.
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Commit bbc2a157 ("xml: completion-help: add helper for all local assigned IP
addresses") added a completionHelper script listing all local assigned
IPv4/IPv6 addresses. This commit extends the system to also list the available
addresses for the source-address CLI nodes.
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This will render the completion help more nicely.
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This reduces duplicated #include statements as each interface type already
contained the individual includes.
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There is a Myricom 10G card with 16k MTU available.
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The current VyOS CLI parser code written in Python contains a ton of duplicates
which I can also hold myself accountable for - or maybe mainly me - depends on
the angle of judge.
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This is a base requirement for l2vpn evpn. When source-address is configured,
the option "local <source-addr> nolearning" is appended when creating the
interface as mentioned here: https://vincent.bernat.ch/en/blog/2017-vxlan-bgp-evpn
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Autoconfigure addresses using Prefix Information in Router Advertisements.
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... to new XML and Python based frontend/backend.
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Provide an XML/Python abstraction to
* ip disable-arp-filter
* ip enable-arp-accept
* ip enable-arp-announce
* ip enable-arp-ignore
The old implementation can co-exist until the last interfaces have been
migrated.
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