BGP routing issues

[raajesh8228]

Hi Guys,

Please provide the resolution for this issue.

Please refer the above diagram, IBGP & EBGP configured,

routes are propagated from Ibgp to Ebgp, but Router5 unable to reach EBGP routes.

Router 5 able to see the Router 6 routes with next hop is R3 with next-hop-self.

R3 & R4 able to reach Ebgp routes and Router 6 able to reach Router 5 subnets.

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As per the suggestion after redistributing in ospf into bgp we are able to reach EBGP networks from Router5.

Please  let us know why redistribution is required, EBGP routes already in router 5 routing table.

[SANTHOSHKUMAR SARAVANAN]

Hi , 

 Share me below outputs from your R5 . 

show ip protocols 

show ip bgp  

HTH

Sandy

[syed kazim abbas · Accepted solution]

Router 6 is able to reach the router 5 network because it has the route information and it send the packet to router 3 and it forward to router 5. router 5 have routing information between router 3,4 and 6 route due to ospf.

But when router 5 send packet it uses egress interface (for example 35.1.1.5) Router 6 does't know the route between router 3 and router 5 so it drop the packet. there are two solutions:

a static route on router 6 (route between router 3 and 5) 

ip route 35.1.1.0 255.255.255.0 router_3_ip

the second option , redistribute the ospf in bgp on router 3.

regards,

kazim