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BGP Advertised route missing Metric

NPT_2
Level 2
Level 2

Hello,

I am advertising 4 networks via BGP from 2 7206VXR Routers to 2 separate providers.  The problem I have is that one of my routes is not fully propagating over the internet via one of my upstream providers.

If I do a show ip bgp nei advertised routes The network with this issue 67.107.224.0/24 shows as being advertised but it is missing the metric.  The other 3 networks advertise without issue.  I'm not sure what is causing the missing metric, or if this could be the cause of my issue.  Any thoughts?

BGP table version is 85483076, local router ID is 66.62.151.129
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 12.17.162.0/24   66.62.151.2              0         32768 i
*> 66.62.151.0/24   66.62.151.1           2816         32768 i
*>i67.107.224.0/24  66.62.151.15                  100      0 i
*>i67.107.225.0/24  66.62.151.1              0    100      0 i

Total number of prefixes 4

1 Accepted Solution

Accepted Solutions

Hi NPT,

While advertising to eBGP peers....

If  the route source is iBGP then it doesnt put MED(Metric) into update otherwise  it takes whatever metric is in the routing table (assume metric = 0 for  connected and static routes) and puts that value into MED when you advertise into BGP. If you need to propagate MED value learned from iBGP to eBGP peers you can use set metric-type internal in route-map.

Try the above and see if it works.

Also, you said that the prefix is not getting propogated upstream..Can you please advise what is that you are seeing that tells you that the prefixes are not getting propagated properly from your end?

HTH,

Regards

Kishore

View solution in original post

2 Replies 2

Hi NPT,

While advertising to eBGP peers....

If  the route source is iBGP then it doesnt put MED(Metric) into update otherwise  it takes whatever metric is in the routing table (assume metric = 0 for  connected and static routes) and puts that value into MED when you advertise into BGP. If you need to propagate MED value learned from iBGP to eBGP peers you can use set metric-type internal in route-map.

Try the above and see if it works.

Also, you said that the prefix is not getting propogated upstream..Can you please advise what is that you are seeing that tells you that the prefixes are not getting propagated properly from your end?

HTH,

Regards

Kishore

I found out from my upstream provider that they were missing the prefix in their route filter, once they changed that all is well.