BGP routing routing issue

[ElshanMammadli5597]

We have faced routing issue related to ibgp and ebgp peering. simple topology has attacded.
main purpose is customer site1's network must reach customer site2 network and vice verse. we can ping from R4 to R3.
R3 and R4 are ASR920 , R1 and R2 Cisco N540.
Ibgp peering between R2 and R3, ebgp peering bw R1 and R2, ebgp peering bw R1 and R4
Bu we know that router dont recevie routes from ibgp peer when it sees itself's AS. How we can do it that we solve this issue. which optimal solution we can choose that we can do it

[MHM Cisco World]

Ibgp peering between R2 and R3

Here issue I think' 

1-First since both ibgp use 

Bgp- Redistrubte-internal 

2- you need to use next hop self between two ibgp

That it 

Check point above abd I think your issue will solved

MHM

[ElshanMammadli5597]

Hello @MHM Cisco World 

I did it but result is same

R2 bgp config 

router bgp 65038
neighbor 10.82.32.13
remote-as 65038
update-source Loopback0
address-family vpnv4 unicast
route-policy allow in
route-policy allow out
next-hop-self
soft-reconfiguration inbound always
!




R3 bgp config




router bgp 65038
bgp router-id 10.82.32.13
bgp log-neighbor-changes
neighbor 10.82.32.101 remote-as 65038
neighbor 10.82.32.101 update-source Loopback0
!
address-family ipv4
neighbor 10.82.32.101 activate
exit-address-family
!
address-family vpnv4
neighbor 10.82.32.101 activate
neighbor 10.82.32.101 send-community both
neighbor 10.82.32.101 next-hop-self
neighbor 10.82.32.101 route-map azercell_out out
exit-address-family
!
address-family ipv4 vrf 4G_RAN
redistribute connected
exit-address-family

[MHM Cisco World]

There is big mess here 

Why there is vpnv4 and ipv4 address family.

Above two points need check and also vrf target import export 

MHM

[ElshanMammadli5597]

We use vpnv4 address familiy. ipv4 peering is down.

vrf target import export values are same on both routers. But i am not sure that that this value must be same or different

[MHM Cisco World]

The design must be 

Ipv4vrf-vpnv4-Ipv4vrf

The vpndv4 even with route export/import not work without ipv4vrf.

Can you show me where vpnv4 start and where it end.

MHM

[ElshanMammadli5597]

All networks is collected in R1. R1 learns routes from R4 via ebgp and learns other routes form R2 also via ebgp. R1 advertices these routes via ibgp (ASR34170) to RR routers.  We want to see R3 routes in R4 and vice versa

[Harold Ritter · Accepted solution]

Hi @ElshanMammadli5597 ,

On R2, you need to allow updates containing the local coming from R1 as follow:

router bgp 65038

neighbor 10.82.32.13

address-family vpnv4 unicast

allowas-in

You will need to do the same on other routers needing to accept updates containing their own AS as well.

Regards,