FRR / Juniper BGP Link Bandwidth Community

[rexcys]

Hello,

I would like to ask if anyone has experience making inter-op working between FRR/JUNOS for BGP link bandwidth community,

When I set 10m for a route advertised by Juniper, the cumulus doesn't show the right value

From Juniper
inet.0: 143 destinations, 374 routes (143 active, 0 holddown, 0 hidden)

• x.x.x.x/32 (10 entries, 1 announced)
  BGP group leaf type External
  AS path: [65368] 65348 I
  Communities: bandwidth:65368:750000 <<<<<

From cumulus:

Paths: (2 available, best #1)
65366 65340
fe80::6a21:5fff:fe0f:a386 from (10.121.32.138)
(fe80::6a21:5fff:fe0f:a386) (used)
Origin IGP, valid, external, multipath, bestpath-from-AS 65366, best (Older Path)
Extended Community: LB:65366:2500000 (20.000 Mbps) < This is advertised from FRR and look good
Last update: Tue Nov 1 11:02:26 2022
Below is advertised from Juniper
65368 65348
10.121.47.65 from swp21.1 (10.121.32.192)
Origin IGP, valid, external, multipath, bestpath-from-AS 65368
Extended Community: LB:65368:1169915904 (9.000 Gbps)
Last update: Tue Nov 1 10:49:04 2022

Regards,
CYS

[ton31337]

Try this option http://docs.frrouting.org/en/stable-8.3/bgp.html#clicmd-neighbor-PEER-disable-link-bw-encoding-ieee

[rexcys]

Hello @ton31337 . Is this option available from specific release? (Guess 8.3 onwards)?

R33# sh ver
FRRouting 7.4+cl4.2.1u1

(config-router-af)# neighbor eor-spine
activate Enable the Address Family for this Neighbor
addpath-tx-all-paths Use addpath to advertise all paths to a neighbor
addpath-tx-bestpath-per-AS Use addpath to advertise the bestpath per each neighboring AS
allowas-in Accept as-path with my AS present in it
as-override Override ASNs in outbound updates if aspath equals remote-as
attribute-unchanged BGP attribute is propagated unchanged to this neighbor
capability Advertise capability to the peer
default-originate Originate default route to this neighbor
distribute-list Filter updates to/from this neighbor
filter-list Establish BGP filters
maximum-prefix Maximum number of prefixes to accept from this peer
maximum-prefix-out Maximum number of prefixes to be sent to this peer
next-hop-self Disable the next hop calculation for this neighbor
prefix-list Filter updates to/from this neighbor
remove-private-AS Remove private ASNs in outbound updates
route-map Apply route map to neighbor
route-reflector-client Configure a neighbor as Route Reflector client
route-server-client Configure a neighbor as Route Server client
send-community Send Community attribute to this neighbor
soft-reconfiguration Per neighbor soft reconfiguration
unsuppress-map Route-map to selectively unsuppress suppressed routes
weight Set default weight for routes from this neighbor
(config-router-af)# exit
(config-router)# neighbor swp21.1
advertisement-interval Minimum interval between sending BGP routing updates
bfd BFD support
capability Advertise capability to the peer
description Neighbor specific description
disable-connected-check one-hop away EBGP peer using loopback address
dont-capability-negotiate Do not perform capability negotiation
ebgp-multihop Allow EBGP neighbors not on directly connected networks
enforce-first-as Enforce the first AS for EBGP routes
enforce-multihop Enforce EBGP neighbors perform multihop
graceful-restart Graceful Restart command for a neighbor
graceful-restart-disable Graceful Restart Disable command for a neighbor
graceful-restart-helper Graceful Restart Helper command for a neighbor
interface Enable BGP on interface
local-as Specify a local-as number
maximum-prefix-out Maximum number of prefixes to be sent to this peer
override-capability Override capability negotiation result
passive Don't send open messages to this neighbor
password Set a password
peer-group Member of the peer-group
remote-as Specify a BGP neighbor
sender-as-path-loop-detection Detect AS loops before sending to neighbor
shutdown Administratively shut down this neighbor
solo Solo peer - part of its own update group
strict-capability-match Strict capability negotiation match
timers BGP per neighbor timers
ttl-security BGP ttl-security parameters
update-source Source of routing updates

[ton31337]

Oh, you are using very old version which uses wrong encoding. Try at least 8.2.2.

[ton31337]

Of this is Cumulus Linux, then I don't know which version has that fix.

[rexcys]

Oh.. yes~ @ton31337 you're right. I am using cumulus that comes with that version 7.4. I am unsure if there's way to separate upgrade to 8.2. Thanks a lot for the info and it indeed helps. Will check with Cumulus (Nvidia)