non-transitive Bandwidth ext-community setting on outbound route-map to eBGP peers #17142
Description
Description
I am running FRRouting 8.5.4 (but confirmed behaviour in 8.4.4 as well).
When setting the BGP Bandwdith extended community with non-transitive keyword at the end it does not append the community to the list. This should be allowed just like metric or any other non-transitive communities.
Version
FRRouting 8.5.4 (lab-rtor-a05-r98) on Linux(6.1.0-11-2-amd64).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
'--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-option-checking' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-maintainer-mode' '--localstatedir=/var/run/frr' '--sbindir=/usr/lib/frr' '--sysconfdir=/etc/frr' '--with-vtysh-pager=/usr/bin/pager' '--libdir=/usr/lib/x86_64-linux-gnu/frr' '--with-moduledir=/usr/lib/x86_64-linux-gnu/frr/modules' '--disable-dependency-tracking' '--disable-rpki' '--disable-scripting' '--enable-pim6d' '--with-libpam' '--enable-doc' '--enable-doc-html' '--enable-snmp' '--enable-fpm' '--disable-protobuf' '--disable-zeromq' '--enable-ospfapi' '--enable-bgp-vnc' '--enable-multipath=256' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' '--enable-grpc' 'build_alias=x86_64-linux-gnu' 'PYTHON=python3'
How to reproduce
The topology is simple, router1 ens3 interface is connected to router2 ens3 interface.
router 1 ip addr output:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether XY:ZA:BC:DE:FG brd ff:ff:ff:ff:ff:ff
altname enp0s3
inet 192.0.2.2/30 brd 192.0.2.3 scope global ens3
valid_lft forever preferred_lft forever
router 2 ip addr show:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet 192.0.2.255/32 brd 192.0.2.255 scope global lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether link/ether XY:ZA:BC:DE:GF brd ff:ff:ff:ff:ff:ff
altname enp0s3
inet 192.0.2.1/30 brd 192.0.2.3 scope global ens3
valid_lft forever preferred_lft forever
Router1 configuration:
frr version 8.4.4
frr defaults traditional
hostname FRR-1
log syslog informational
no ip forwarding
no ipv6 forwarding
service integrated-vtysh-config
!
router bgp 65534
neighbor 192.0.2.1 remote-as 65533
!
address-family ipv4 unicast
neighbor 192.0.2.1 route-map PERMIT in
neighbor 192.0.2.1 route-map PERMIT out
exit-address-family
exit
!
route-map PERMIT permit 10
exit
!
end
Router2:
frr version 8.4.4
frr defaults traditional
hostname FRR2
log syslog informational
no ip forwarding
no ipv6 forwarding
service integrated-vtysh-config
!
router bgp 65533
neighbor 192.0.2.2 remote-as 65534
!
address-family ipv4 unicast
redistribute connected
neighbor 192.0.2.2 route-map PERMIT in
neighbor 192.0.2.2 route-map SET-BW out
exit-address-family
exit
!
route-map SET-BW permit 10
set extcommunity bandwidth 1 non-transitive
set metric 100
exit
!
route-map PERMIT permit 10
exit
Expected behavior
I expect the bandwidth community as well as the MED community to be set in the update.
Actual behavior
The Bandwidth community is not set, however the MED is.
Additional context
In addition to this certain network device vendor (and wireshark) doesn't recognize the bandwidth community when the first 2 octets are 0x00.
Checklist
- I have searched the open issues for this bug.
- I have not included sensitive information in this report.