Interesting days as always. Recently I was handed over “Alumni form” from college.
Mixed feelings. This brings me to conclusion that I somewhat missed college life but anyways that’s small price I paid for my high obsession with some long term ideas. (ok may be that explains why I don’t have a Facebook account? Stop asking me about it!)
Hard to come to any conclusion at this stage.
Anyways post for today…
Last night I was looking at routing tables and saw a interesting case where for a specific route.
Here’s what I got from Tata’s AS6453 looking glass:
Router: gin-ldn-core4
Site: UK, London, LDN
Command: show ip bgp 117.219.227.229
BGP routing table entry for 117.219.224.0/20
Bestpath Modifiers: deterministic-med
Paths: (4 available, best #4)
Multipath: eBGP
17 18 19
33765 1299 3549 9829, (received-only)
ix-3-1-2.core4.LDN-London. from ix-3-1-2.core4.LDN-London. (ix-3-1-2.core4.LDN-London.)
Origin IGP, valid, external
4755 9829
mlv-tcore2. (metric 3605) from l78-tcore2. (66.110.10.234)
Origin IGP, valid, internal
Community:
Originator: 66.110.10.215
4755 9829
mlv-tcore2. (metric 3605) from l78-tcore1. (66.110.10.237)
Origin IGP, valid, internal
Community:
Originator: 66.110.10.215
4755 9829
mlv-tcore2. (metric 3605) from ldn-mcore3. (ldn-mcore3.)
Origin IGP, valid, internal, best
Community:
Originator: 66.110.10.215
The first route in table seems pretty weird. AS path is 33765 1299 3549 9829 i.e clearly AS33765 sitting in middle of AS6453 and AS1299. This must be a route leak since Tata AS6453 and Telia AS1299 are way too bigger then Tanzania telecom and hence there’s no possibility of Tata transitting via Tanzania telecom. Though issue seems for just one specific route for BSNL which Tanzania telecom is learning from Telia, which further is getting from Global Crossing AS3549 (one of upstreams of BSNL).