[178841] in North American Network Operators' Group
distinguishing eBGP from show ip BGP
daemon@ATHENA.MIT.EDU (Reza Motamedi)
Wed Mar 11 14:33:14 2015
X-Original-To: nanog@nanog.org
From: Reza Motamedi <motamedi@cs.uoregon.edu>
Date: Wed, 11 Mar 2015 14:32:33 -0400
To: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
Hi Nanog,
For a research I want to distinguish the external AS peering from "show ip
BGP". In other words I want to see which entry show a path that immediately
sends packets to another AS. My understanding is that *status code* shows
if the route is internal, right? Does this mean if the *'i' *is not
present, the route is goes out of the AS in the next hop. On the same note,
can I use "Next Hop" to identify such entries?
I just included a sample report from a public looking glass in XO.
show ip bgp 207.108.0.0/15 longer-prefixes
BGP table version is 529230540, local router ID is 65.106.7.145
* * *Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
r RIB-failure, S Stale, m multipath, b backup-path, x
best-external, f RT-Filter, a additional-path
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
* 207.108.0.0/15 216.156.2.164 3 0 2828 209 i
* 65.106.7.101 2 0 2828 209 i
* 65.106.7.246 3 0 2828 209 i
* 65.106.7.55 3 0 2828 209 i
*> 216.156.2.162 2 0 2828 209 i
* 65.106.7.54 3 0 2828 209 i
* 65.106.7.252 2 0 2828 209 i
* 216.156.2.160 2 0 2828 209 i
* 65.106.7.56 3 0 2828 209 i
* 216.156.2.165 2 0 2828 209 i
* 65.106.7.144 2 0 2828 209 i
Best Regards
Reza Motamedi (R.M)
Graduate Research Fellow
Oregon Network Research Group
Computer and Information Science
University of Oregon
