06 Jul

ISC F root server – IPv6 issue at NIXI Chennai

Last week I noticed that F root was showing poor connectivity with Indian RIPE Atlas probes for F-root. The graph looked really terrible.

 

 

 

I traced to it from one of RIPE Atlas probes and saw this trace:

 

Here the last hop before timeout i.e hop 6 is of NIXI Chennai peering subnet 2001:de8:1:2::/64. As soon as I saw it, it reminded me older issue which happened and broke IPv4 connectivity to root DNS servers. I blogged about it here, here and here. So the problem remains that NIXI is broken cost wise due to charge on in – out policy. This leads to people accepting routes at all NIXI’s but they do not announce their routes. Thus return path is broken and essentially traffic is being blackholed. Earlier this issue was fixed by adding IP transit support to these root DNS servers so that a default route stays in case of all other failures.

It seems like same is missing in IPv4 world and routes are not being announced.

During this time, I saw two BGP sessions at NIXI Chennai for F root:

2001:de8:1:2::3 24049 ESTAB 25d 3h10m 1 0 2263 0
2001:de8:1:2::4 24049 ESTAB 125d18h30m 1 0 2264 0

 

Both were announcing prefix covering F root server’s pool:

 

I posted about it on SANOG and APNIC mailing list. Though there hasn’t been any reply by ISC, Sunny from APNIC passed info to them and I noticed that prefix announcement from NIXI has been withdrawn. Connectivity to F root now works to the instances outside India.

 

 

 

Waiting to hear from ISC as of now. Time to get back to work!

 

02 Jun

NPIX Traffic reaches hits 1Gbps!

Seems like NPIX traffic has started hitting 1Gbps levels and that is just so amazing. Came across this post by Niranjan.

 

 

NPIX or Nepal Internet Exchange is located in Kathmandu and operates out of its own datacenter. There’s a huge amount of (overhead) dark fibre availability in Kathmandu and as of the writing of this post I see 30 members at NPIX. 1Gbps might seem low from Western IX’es standards but that’s a quite good amount of traffic for an IX in South Asian region. If you see the member list there are just smaller ISPs and not many content players over there. Comparing numbers by NIXI traffic, NPIX has more traffic now than NIXI Kolkata, NIXI Bangalore, NIXI Hyderabad and NIXI Ahmedabad combined! and it’s so disheartening to see such low numbers at NIXI and almost no effort being made to fix it over all these years despite so much talk.

NPIX will likely get content players soon. They do not have any policy problem in hosting them, unlike NIXI which expects participating networks with ISP license. Last update on this was from Mr Rajesh Charia (who is on the board of NIXI & also President of ISPAI) during APRICOT 2016 in New Zealand. He had a discussion with Kam Sze from Akamai over bandwidth requirements of Akamai cache. As the discussion proceeded, Owen Delong from Akamai pointed out Akamai’s strategy of connecting to IX and at this point, Mr Rajesh said that NIXI is into the discussion to allow content & CDN players to NIXI fabric.

 

 

Unfortunately, this is still not done! 🙁

While writing this post I felt the pretty strong earthquake here in North India.

 

With the hope that everyone is safe, time to get some sleep!