11 Mar

BSNL routing messup at NIXI Delhi

Finally back in village location.

 

Was just looking around and saw BSNL having really crazy routing. I looked around and saw this:

NIXI Looking Glass – show ip bgp neighbors 218.100.48.15 routes

Router: NIXI Delhi (Noida)

Command: show ip bgp neighbors 218.100.48.15 routes

 

Total number of prefixes 0

 

 

Clearly BSNL is NOT announcing any prefix at NIXI Delhi at all. Thus if one has to send packets to BSNL in North area either it will be via transit (Tata/VSNL) or via any other peering NIXI exchange in Mumbai or Chennai.

 

Example of messed up routes (trace from Haryana)

Anurags-MacBook-Pro:~ anurag$ traceroute -a k.root-servers.net.
traceroute to k.root-servers.net (193.0.14.129), 64 hops max, 52 byte packets
1 [AS1] 10.0.0.1 (10.0.0.1) 3.308 ms 2.377 ms 1.767 ms
2 [AS9829] 117.207.184.1 (117.207.184.1) 114.369 ms 25.225 ms 25.222 ms
3 [AS9829] 218.248.173.38 (218.248.173.38) 111.460 ms 104.474 ms 200.114 ms
4 [AS4755] 115.114.89.17.static-mumbai.vsnl.net.in (115.114.89.17) 100.342 ms 101.665 ms 100.533 ms
5 [AS3549] 172.29.252.33 (172.29.252.33) 123.682 ms
[AS0] 172.31.19.126 (172.31.19.126) 121.781 ms
[AS3549] 172.29.252.33 (172.29.252.33) 120.371 ms
6 [AS0] 172.25.83.37 (172.25.83.37) 134.045 ms 128.859 ms 131.228 ms
7 [AS9430] 203.190.136.17 (203.190.136.17) 336.859 ms 350.994 ms 399.309 ms
8 [AS25152] k.root-servers.net (193.0.14.129) 351.069 ms 387.565 ms 463.440 ms

Anurags-MacBook-Pro:~ anurag$ traceroute -a tulip.net
traceroute to tulip.net (116.214.26.243), 64 hops max, 52 byte packets
1 [AS1] 10.0.0.1 (10.0.0.1) 3.134 ms 1.846 ms 1.410 ms
2 [AS9829] 117.207.184.1 (117.207.184.1) 23.865 ms 25.057 ms 23.969 ms
3 [AS9829] 218.248.173.42 (218.248.173.42) 25.635 ms * 24.826 ms
4 [AS9829] 218.248.246.130 (218.248.246.130) 72.688 ms 71.779 ms 76.546 ms
5 [AS4755] 115.113.128.17.static-mumbai.vsnl.net.in (115.113.128.17) 94.713 ms 144.059 ms 93.960 ms
6 [AS0] 172.31.17.106 (172.31.17.106) 122.504 ms 125.455 ms 160.892 ms
7 [AS0] 172.25.83.37 (172.25.83.37) 124.495 ms 124.729 ms 123.955 ms
8 [AS4755] 115.113.248.250.static-delhi.vsnl.net.in (115.113.248.250) 127.256 ms 128.388 ms 127.253 ms
9 * * *
10 [AS37986] 116.214.26-243.del.tulipconnect.com (116.214.26.243) 126.804 ms 147.704 ms 143.994 ms
Anurags-MacBook-Pro:~ anurag$ 

 

So clear lot of traffic exchange between Northern networks are happening from far down in South.

 

Anyways time to do some more interesting work for now! 😉

 

 

***Update***

BSNL seems to be announcing 500+ prefixes now at NIXI Delhi and routes are again pretty good. And I have no idea why they did this!

Router: NIXI Delhi (Noida)

Command: show ip bgp neighbors 218.100.48.15 routes

BGP table version is 2146799, local router ID is 218.100.48.1
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
*> 49.50.64.0/18 218.100.48.15 0 9829 55470 i
*> 59.89.32.0/20 218.100.48.15 0 0 9829 ?
*> 59.89.48.0/20 218.100.48.15 0 0 9829 ?
*> 59.89.64.0/20 218.100.48.15 0 0 9829 ?
*> 59.89.80.0/20 218.100.48.15 0 0 9829 ?
*> 59.89.96.0/20 218.100.48.15 0 0 9829 ?
*> 59.89.112.0/20 218.100.48.15 0 0 9829 ?
*> 59.89.208.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.0.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.16.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.48.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.80.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.96.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.112.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.128.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.144.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.160.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.176.0/20 218.100.48.15 0 0 9829 ?
*> 59.90.184.0/24 218.100.48.15 0 9829 i

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