[c-nsp] BGP best path

[Mikisa Richard]

Oliver Boehmer (oboehmer) wrote:

>Here's your problem: The "UPLINK" originates and advertises
>64.152.195.33/32 to "BUSH-UPLINK-01". But it is not received there. Does
>BUSH-UPLINK knows this address via IGP?
>You see that BUSH-UPLINK knows 64.152.195.0 through 64.152.195.33/32,
>and unless the /32 is learned as a more specific network (preferably via
>IGP), BUSH-UPLINK can't resove this next-hop.
>
>If you add "neighbor 217.212.243.254 next-hop-self" on "UPLINK", this
>router will advertise the networks using its own address
>(217.212.243.2), and the recursion stops. Or you advertise the /32 (or
>/30) via IGP, but next-hops-self is preferred..
>
>	oli
>
>  
>
added the next-hop-self to neighbour 217.212.243.254 and below is the 
output ..

BUSH-UPLINK-01#show ip bgp ne 217.212.242.2 ro
BGP table version is 182878, local router ID is 217.212.243.254
Status codes: s suppressed, d damped, h history, * valid, > best, i - 
internal
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path

*>i63.103.129.0/24  217.212.242.2            0    100      0 23549 i
*>i64.152.195.0/24  217.212.242.2            0    100      0 23549 i

Total number of prefixes 5

BUSH-UPLINK-01#show ip bgp nei 213.248.97.89 ad
BGP table version is 182878, local router ID is 217.212.243.254
Status codes: s suppressed, d damped, h history, * valid, > best, i - 
internal
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path

*>i63.103.129.0/24  217.212.242.2            0    100      0 23549 i
*>i64.152.195.0/24  217.212.242.2            0    100      0 23549 i

Looks alright... doesn't it.

Well, still can't see the path in any looking glasses. Will wait a while 
and then check with AS1299(213.248.97.89).

Very grateful

-- 
Richard