troubleshooting Question

Any one can answer the BGP Synchronization question ?

Avatar of davidy2001
davidy2001 asked on
RoutersNetworkingNetwork Architecture
4 Comments1 Solution439 ViewsLast Modified:
Any one can answer the BGP Synchronization question ?

The topology is very simple. Router2---Router1--interface e1/1(ip address 111.1.1.1/24)

R1
router bgp 12
network 111.1.1.0 mask 255.255.255.0
 neighbor 2.2.2.2 remote-as 12
 neighbor 2.2.2.2 update-source Loopback0
router ospf 1
network 0.0.0.0 255.255.255.255 area 0

R2
router bgp 12
 synchronization
neighbor 1.1.1.1 remote-as 12
neighbor 1.1.1.1 update-source Loopback0
router ospf 1
network 0.0.0.0 255.255.255.255 area 0

R2#show ip bgp
   Network          Next Hop            Metric LocPrf Weight Path
* i111.1.1.0/24     1.1.1.1                  0    100      0 i

After R2 enabled synchronization, the network 111.1.1.0/24 in bgp table lost marker “>” in the bgp table.

Question:
In the case, synchronization rule means network 111.1.1.0/24 is inactive (meaning losing marker “>” ) in R2’ BGP table until this network goes into R2 via IGP. Now the network 111.1.1.0/24 already has gone into R2 via IGP. Why does the network 111.1.1.0/24 is still inactive in R2 BGP table after enabling synchronization in R2 ?
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 1 Answer and 4 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 4 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros