09-28-2011 10:42 AM - edited 03-04-2019 01:45 PM
Hello,
Please find attached case scenario regarding injecting IGP routes into BGP.
When i tried to redistribute EIGRP routes into BGP, the redistribution was successful and router "Vail" can now ping EIGRP subnets. However, router "Aspen" which is an IBGP neighbor cannot ping EIGRP subnets even though they are shown in its bgp table. Although EIGRP routes are shown in Aspen's bgp table, next hop address is pointing to the serial interface of router Taos. I think it should point to Vail not Taos because the next hop of Aspen is Vail. Please note that synchronization is off.
As per the "Routing TCP/IP vol 2" statement, sync. must be disabled if i have fully meshed IBGP peers as sync. is useful only if i have internal IGP.
Configuration files are attached as well.
Please help.
Regards,
A.M.
Solved! Go to Solution.
09-28-2011 11:01 AM
Hi,
add this to Vail:
router bgp 100
neighbor 192.168.1.222 next-hop-self
Don't forget iBGP router doesn't change next-hop by default only eBGP does.
So using this command is one way to solve this problem.
show ip bgp
Once you have issued the command then output of those 2 show commands will mark prefix as best with a > sign and the next-hop will be in the RIB.
Regards.
Alain.
09-28-2011 11:01 AM
Hi,
add this to Vail:
router bgp 100
neighbor 192.168.1.222 next-hop-self
Don't forget iBGP router doesn't change next-hop by default only eBGP does.
So using this command is one way to solve this problem.
show ip bgp
Once you have issued the command then output of those 2 show commands will mark prefix as best with a > sign and the next-hop will be in the RIB.
Regards.
Alain.
09-28-2011 12:32 PM
Oh! i totally forgot to issue this command even though i studied it. Now i understand why the book didn't mention it in that case scenario because simply that case scenario talks about another topic.
I thank you so much for your help. it is, of course, working now.
Regards,
A.M.
09-28-2011 12:55 PM
Hi,
Don't forget to rate if it was helpful as it seems it was.
Regards.
Alain.
09-28-2011 02:10 PM
How can i rate? ... I thought accepting an answer is by itself considered a rate.
09-28-2011 02:20 PM
Hi,
you did it.
Regards.
Alain.
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