[FROG] [Help Wanted] The route was not advertised to any peer

Wei-Yu Chen aweimeow.tw at gmail.com
Thu Sep 17 07:42:28 UTC 2020


Hello FRR communities,

I’m working on the following topology, it’s a simple experimental environment to learn how to configure route service with FRR.

H1 - R1 - R2 - H2

Here is the IP information:
H1: 192.168.10.1/24
H2: 192.168.20.1/24
R1: 192.168.10.254/24 & 192.168.30.1/24
R2: 192.168.20.254/24 & 192.168.30.2/24


And for the R1 and R2 was in separate AS, configuration as below:

R1:
router bgp 7675
 bgp router-id 192.168.30.1
 neighbor 192.168.30.2 remote-as 7676
 !
 address-family ipv4 unicast
 network 192.168.10.0/24
 exit-address-family

R2:
router bgp 7676
 bgp router-id 192.168.30.2
 neighbor 192.168.30.1 remote-as 7675
 !
 address-family ipv4 unicast
 network 192.168.20.0/24
 exit-address-family

---

However, R1 didn’t get the “192.168.20.0/24” route, and R2 didn’t get the “192.168.10.0/24” route. So I decided to dig the debug info deeper. Here is some information I got:

R1 # show ip route

K>* 0.0.0.0/0 [0/0] via <my_public_gw>, enp8s0, 01:07:41
C>* <my_public_ip>/26 is directly connected, enp8s0, 01:07:41
K>* 192.168.10.0/24 [0/0] is directly connected, veth2, 00:23:10
C>* 192.168.30.0/24 is directly connected, veth0, 00:40:32

R1 # show ip bgp 192.168.10.0
BGP routing table entry for 192.168.10.0/24
Paths: (1 available, best #1, table default)
 Not advertised to any peer
 Local
 0.0.0.0 from 0.0.0.0 (192.168.30.1)
 Origin IGP, metric 0, weight 32768, valid, sourced, local, best (First path received)
 Last update: Thu Sep 17 06:30:46 2020

>>>

R2 # show ip route

C>* 192.168.20.0/24 is directly connected, veth1000, 00:41:39
C>* 192.168.30.0/24 is directly connected, veth1, 00:41:41

R2 # show ip bgp 192.168.20.0/24
BGP routing table entry for 192.168.20.0/24
Paths: (1 available, best #1, table default)
 Not advertised to any peer
 Local
 0.0.0.0 from 0.0.0.0 (192.168.30.2)
 Origin IGP, metric 0, weight 32768, valid, sourced, local, best (First path received)
 Last update: Thu Sep 17 06:57:55 2020

/////

What I noticed is the “Not advertised to any peer”, and I can’t figure out why.
Appreciated to any help and advise, please let me know if you need further information.

Thank you guys.

---
Best regards,
Wei-Yu Chen
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