Faster tunnel to IPv6 internet.

Thanks to network admins at Bharti and Hurricane Electric, RTT to HE’s IPv6 tunnel server at HK PoP is reduced. Yippee!!

+-(130:20:44:%)-- traceroute -I                                                            --(Sun,Dec06)-+
traceroute to (, 64 hops max, 72 byte packets
 1 (  41.593 ms  44.970 ms  52.979 ms
 2 (  41.596 ms  44.188 ms  45.308 ms
 3 (  44.376 ms  44.404 ms  45.537 ms
 4 (  45.105 ms  42.097 ms  43.629 ms
 5 (  150.993 ms  155.188 ms  154.701 ms
 6 (  165.843 ms  158.931 ms  164.889 ms
 7 (  158.572 ms  154.562 ms  154.215 ms
+-(130:20:45:%)-- ping6                                                                  --(Sun,Dec06)-+
PING6(56=40+8+8 bytes) 2001:470:f803:8000::1 --> 2001:4860:c004::68
16 bytes from 2001:4860:c004::68, icmp_seq=0 hlim=58 time=179.801 ms
16 bytes from 2001:4860:c004::68, icmp_seq=1 hlim=58 time=181.696 ms
16 bytes from 2001:4860:c004::68, icmp_seq=2 hlim=58 time=179.953 ms
16 bytes from 2001:4860:c004::68, icmp_seq=3 hlim=58 time=179.401 ms
--- ping6 statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 179.401/180.213/181.696/0.880 ms


  1. Posted 20091206 at 184811 | Permalink | Reply

    I’m glad you have found the better routing to the Hurricane Electric Hong Kong POP from your Bharti Airtel connection. In general we try to constantly improve peering and global routing as part of our day-to-day operations. In this case your IPv6 tunnelbroker connection is the winner.

    Enjoy your faster IPv6 connection.

  2. 762e5e74
    Posted 20091209 at 173758 | Permalink | Reply

    Hi Martin,

    Thanks for the comment :).

    Looking forward to see latency reduced even more or better ISPs offering native IPv6 connectivity in India.


  3. Kaustubh
    Posted 20110619 at 084427 | Permalink | Reply

    Hey Ashish,

    I just wanted to know how you set up the tunnel? When I tried setting up the tunnelbroker from HE, it said that the firewall had blocked ICMP from external IPs(HE IPv4 address). How did you get Airtel to unblock traffic coming from the IPv4 Hurricane Electric ?

    • Ashish SHUKLA
      Posted 20110620 at 052255 | Permalink | Reply

      Hi Kaustubh,

      For protocol 41 (6in4) tunnels (which HE tunnel is), you either need a protocol 41 aware CPE or you need to bypass NAT. I keep my CPE (modem) set in Bridge mode, and initiate PPPoE from my host. So, no NAT, all traffic from Internet comes at the host, and external IP address is also assigned to the host.


      P.S. I didn’t get Airtel to unblock that traffic, it’s already unblocked.

  4. Kaustubh
    Posted 20110623 at 194231 | Permalink | Reply

    Hey Ashish,

    Thanks for your reply. Could you let me know what type of connection do you have? I have ADSL Broadband connection where I dont have a static IP from Airtel, but my CPE WAN Interface is connected to an Airtel DHCP Server which assigns the CPE a dynamic public IP address. Now to create a tunnel the HE IPv6 endpoint must be able to ping my public IPv4 address which is not possible, because Airtel has blocked ICMP(prolly at their DHCP itself). Any pointers?


    • Ashish SHUKLA
      Posted 20110624 at 121619 | Permalink | Reply

      Hi Kaustubh,

      I’m on a similar connection, but I don’t get any address from Airtel DHCP, but PPPoE, and of-course address is dynamic. The PPPoE connection is initiated from my box. I’m able to ping my IP address (on my PC) from outside servers, so I don’t see any issues with Airtel blocking ICMP. As I said earlier, set your modem in Bridge mode, i.e. instead of configuring ATM VC in PPPoE mode, change it to Bridge mode in your CPE. And then dial internet from PPPoE client on your PC.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: