bgpd: route map changes not propagated to existing static network (ipv4 unicast tested)

[louberger]

1. add route map, e.g.

route-map rm-nh permit 10
match ip address al-any
set ip next-hop 192.1.1.5
set local-preference 123
set metric 98

2. advertise static network, e.g.

address-family ipv4 unicast
network 5.0.0.0/24 route-map rm-nh

3. modify route map, e.g.,

route-map rm-nh permit 10
set large-community 12:34:56
set extcommunity rt 89:123
set community 0:67

4. add new static network, e.g.

address-family ipv4 unicast
network 5.0.10.0/24 route-map rm-nh

5. wait some time (minutes)

6. see that only new static net is impacted by route map change

CE-192.1.1.5# show bgp ipv4 uni 5.0.0.0/24
BGP routing table entry for 5.0.0.0/24
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to non peer-group peers:
192.1.1.3
Local
192.1.1.5 from 0.0.0.0 (192.1.1.5)
Origin IGP, metric 98, localpref 123, weight 32768, valid, sourced, local, best
AddPath ID: RX 0, TX 2
Last update: Thu Sep 7 09:15:21 2017

CE-192.1.1.5# show bgp ipv4 uni 5.0.10.0/24
BGP routing table entry for 5.0.10.0/24
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to non peer-group peers:
192.1.1.3
Local
192.1.1.5 from 0.0.0.0 (192.1.1.5)
Origin IGP, metric 98, localpref 123, weight 32768, valid, sourced, local, best
Community: 0:67
Extended Community: RT:89:123
Large Community: 12:34:56
AddPath ID: RX 0, TX 12
Last update: Thu Sep 7 09:16:24 2017

[dwalton76]

I tried this out and it only breaks when --enable-bgp-vnc=yes is used. I don't know the VNC code at all so assigning this to @louberger

[patrick7]

I'm seeing the same issue

[ton31337]

Tested with:

spine1-debian-9# show version 
FRRouting 7.2-dev-MyOwnFRRVersion-g5d5e3d9 (spine1-debian-9).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
This is a git build of frr-7.1-dev-555-gf85d5e3d9
Associated branch(es):
	local:master
	github/ton31337/frr/master

configured with:
    '--enable-systemd' '--enable-exampledir=/usr/share/doc/frr/examples/' '--localstatedir=/var/opt/frr' '--sbindir=/usr/lib/frr' '--sysconfdir=/etc/frr' '--enable-vtysh' '--enable-isisd' '--enable-pimd' '--enable-watchfrr' '--enable-ospfclient=yes' '--enable-ospfapi=yes' '--enable-multipath=64' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' '--enable-rtadv' '--enable-fpm' '--enable-ldpd' '--with-pkg-git-version' '--with-pkg-extra-version=-MyOwnFRRVersion' '--disable-nhrpd' '--enable-bgp-vnc=yes'

Can't reproduce this.