networking

How Does the Internet Work? - Vox

Anurag Bhatia
A nice short 20mins video by VOX on how the internet works. It covers the basic idea of connectivity a higher level and I am probably going to pass this link to friends & family members outside of the networking domain when they ask. It also covers 60 Hudson Street which I visited exactly an year ago. :)

NIXI root DNS servers and updates

Anurag Bhatia
Has been a while since I checked the status of root servers which are hosted at NIXI. The list as per their official member list stays the same i.e i root in Mumbai, K root in Noida and F root in Chennai. i root seems to be up! show ip bgp neighbors 218.100.48.75 received-routes There are 5 received routes from neighbor 218.100.48.75 Searching for matching routes, use ^C to quit... Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH m:NOT-INSTALLED-MULTIPATH S:SUPPRESSED F:FILTERED s:STALE Prefix Next Hop MED LocPrf Weight Status 1 192.

CDN Caching Panel discussion at APNIC 46

Anurag Bhatia
I am in Noumea in New Caledonia in the Pacific Islands. Next week we have APNIC 46 conference and I would be moderating an exciting panel discussion with friends from Akamai, Cloudflare, Facebook and more about working of CDNs. If attending APNIC 46, please come & join this session. If you are interested in connecting to Hurricane Electric (AS6939) in this region, please do drop me a message. (List of our PoPs in the region here)

Calculating IPv6 subnets outside the nibble boundary

Anurag Bhatia
Often this comes into the subnetting discussion by my friends who are deploying IPv6 for the first time. How do you calculate subnets outside the 4-bit nibble boundary? This also happens to be one of starting points of APNIC IPv6 routing workshop where I occasionally instruct as community trainer. So what is a Nibble boundary? In IPv6 context, it refers to 4 bit and any change in multiple of 4 bits is easy to calculate.

RIPE Atlas India coverage and some thoughts

Anurag Bhatia
It has been some time since I started pushing Indian community for hosting RIPE Atlas Probes. These probes are small devices designed to be hosted at end user’s connection and do pre-defined as well as user-defined measurement. Measurement includes ping, trace, DNS lookup, SSL check etc. Currently, there are 61 active RIPE Atlas probes. I would say it has +/- of 7-8 probes which go offline and come back online when I request hosts to check.