02-21-2008 03:32 PM - edited 03-03-2019 08:49 PM
I am having an issue with only receiving a partial routing table at a new site connected via Verizon's MPLS service.
The routing protocol used for PE-CE is BGP. The routers involved are all 2821 running the same version of software - v12.4(11).
The new site receive route information for most of the existing sites, but does not get route info for a few specific sites. The BGP routing configuration is the same at all site except for the site specific information.
Basically, Site D is a new site. Site D receives routing info. for sites B and C, but not A.
Sites A receives route info for sites B and C, but not D.
A trace route from A to D, dies after the PE device at site D. A trace route from D to A fails imediately.
A sample of the BGP routing config is below:
router bgp 1
no synchronization
bgp log-neighbor-changes
redistribute eigrp ### metric 20
neighbor x.x.x.x remote-as #####
no auto-summary
I'm not sure if the issue is with our routing, or if Verizon's PE is not passing all the routing updates.
Anyone has any sugestions?
02-21-2008 05:59 PM
For the new site D, use the show bgp neighbor command to see the routes being received from the provider peer and to confirm what site D is sending to the provider (you didn't mention whether sites B and C see D).
02-21-2008 09:20 PM
Sites B and C are receive route info for both Site A and D.
Sh BGP on A show no information for site D, and Sh BGP on site D show no information for A.
Both A and D show BGP entries for sites B and C.
02-22-2008 05:28 AM
Assuming there's no inbound BGP filters, route maps, etc. on either site A and D, then if you haven't already, you could try a bgp clear inbound at both sites A and D. If routes still not there, might be time to contact MPLS vendor.
02-22-2008 08:18 AM
Unfortunately, the bgp clear did not work. so I'll be calling the vendor.
thanks for the hrlp.
02-22-2008 08:36 AM
If possible, let us know about problem resolution.
02-24-2008 11:10 AM
Hi,
1st, if you are running bgp as a CE-PE routing protocol, the above shouldnt be the config sample. why are you redistributing Eigrp?
Could you check you BGP routing table at Site-A & D.
The Symptoms appears as there is no route back from Site-D to A.
This could be due to a lot of problems at the service provider, whether the Networks at Site-D are not advertised through MP-BGP or it could be a route-target issue at the service provider.
Pls let us know how you routing table look like at both sites.
HTH
Mohamed
02-25-2008 01:23 AM
Can you try configuring the following under the BGP session at D
router bgp 1
neighbor x.x.x.x allow-as in
Narayan
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