R3---R1----R2--------R4
R3 is also connected to R4 and
R1 and R2 are in AS100
R3 AS300
R4 AS400
I'm advertising a subnet 10.4.10.0/24 and 10.4.20.0/24 in R4, I can see this subnet in R2> learn from R4 and I see it in R3 learn from R4. I expect to see two learned routes in R1, one from R3 and one from R2 but I only see one route in R1 for the subnet 10.4.10.0/24 from R3, can someone explain what could be missing here?
R1#sh ip bgp 10.4.10.0
BGP routing table entry for 10.4.10.0/24, version 4
Paths: (1 available, best #1, table default)
Not advertised to any peer
Refresh Epoch 1
300 400
10.1.3.2 from 10.1.3.2 (10.3.4.1)
Origin IGP, localpref 100, valid, external, best
rx pathid: 0, tx pathid: 0x0
R1- config
router bgp 100
bgp log-neighbor-changes
network 10.1.10.0 mask 255.255.255.0
network 10.1.20.0 mask 255.255.255.0
neighbor 2.2.2.2 remote-as 100
neighbor 2.2.2.2 ebgp-multihop 2
neighbor 2.2.2.2 update-source Loopback0
neighbor 10.1.3.2 remote-as 300
R2 -Config
router bgp 100
bgp log-neighbor-changes
network 10.2.10.0 mask 255.255.255.0
network 10.2.20.0 mask 255.255.255.0
neighbor 1.1.1.1 remote-as 100
neighbor 1.1.1.1 ebgp-multihop 2
neighbor 1.1.1.1 update-source Loopback0
neighbor 4.4.4.4 remote-as 400
neighbor 4.4.4.4 ebgp-multihop 2
neighbor 4.4.4.4 update-source Loopback0
R3-config
router bgp 300
bgp log-neighbor-changes
neighbor 10.1.3.1 remote-as 100
neighbor 10.3.4.2 remote-as 400
R4# sh run | sec router bgp
router bgp 400
bgp log-neighbor-changes
network 10.4.10.0 mask 255.255.255.0
network 10.4.20.0 mask 255.255.255.0
neighbor 2.2.2.2 remote-as 100
neighbor 2.2.2.2 ebgp-multihop 2
neighbor 2.2.2.2 update-source Loopback0
neighbor 10.3.4.1 remote-as 300
R4#
