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steve1515
Premium Member
join:2000-08-07
Peabody, MA

steve1515

Premium Member

[IPv6] Comcast6.net Down?

I've noticed that I can no longer access »www.comcast6.net
Can anyone else get there? I'm using a HE IPv6 tunnel.
AVonGauss
Premium Member
join:2007-11-01
Boynton Beach, FL

AVonGauss

Premium Member

Its still up and running.

steve1515
Premium Member
join:2000-08-07
Peabody, MA

steve1515

Premium Member

Are you using IPv6 or an HE tunnel?
AVonGauss
Premium Member
join:2007-11-01
Boynton Beach, FL

AVonGauss

Premium Member

I can access it via an HE tunnel.

steve1515
Premium Member
join:2000-08-07
Peabody, MA

steve1515

Premium Member

Can you do a trace route?

This is what I see from here...
C:\Documents and Settings\Steve>tracert www.comcast6.net
 
Tracing route to www.comcast6.g.comcast.net [2001:558:fe23:2:69:252:208:135]
over a maximum of 30 hops:
 
  1    <1 ms    <1 ms    <1 ms  gw-lan.xxx.com [2001:470:xxx]
  2    18 ms    19 ms    19 ms  xxx.tunnel.tserv4.nyc4.ipv6.he.net [2001:470:xxx]
  3    16 ms    24 ms    24 ms  gige-g3-8.core1.nyc4.he.net [2001:470:0:5d::1]
  4    20 ms     *       16 ms  as6453.gige-g3-17.core1.nyc4.he.net [2001:470:0:1a3::2]
  5    15 ms    19 ms    16 ms  2001:5a0:a00:200::16
  6    22 ms    20 ms    19 ms  pos-1-6-0-0-cr01.newyork.ny.ibone.comcast.net [2001:558:0:f5f8::1]
  7    18 ms    19 ms    18 ms  so-0-1-0-0-ar03.ivyland.pa.panjde.comcast.net [2001:558:0:f7e9::2]
  8    21 ms    22 ms    22 ms  te-4-1-ur02.newcastlerdc.de.panjde.comcast.net [2001:558:20:55c::2]
  9  Destination protocol unreachable.
 
Trace complete.
 

Tibby
Winbeta
Premium Member
join:2002-06-01
Oswego, IL

Tibby to steve1515

Premium Member

to steve1515
Here's what I get:

traceroute6 to www.comcast6.g.comcast.net (2001:558:fe23:2:69:252:208:135) from [REDACTED], 64 hops max, 12 byte packets
 1  [REDACTED - My router]  2.956 ms  0.911 ms  1.413 ms
 2  2001:558:6033:c8::1  59.246 ms  27.756 ms  19.760 ms
 3  te-9-5-ur04.wchicago.il.chicago.comcast.net  10.619 ms  12.558 ms  11.945 ms
 4  te-1-6-0-0-ar01.area4.il.chicago.comcast.net  16.272 ms  15.371 ms  41.346 ms
 5  pos-3-12-0-0-cr01.350ecermak.il.ibone.comcast.net  17.674 ms  14.510 ms  15.649 ms
 6  pos-4-3-0-0-cr01.newyork.ny.ibone.comcast.net  42.904 ms  34.037 ms  36.075 ms
 7  so-0-1-0-0-ar03.ivyland.pa.panjde.comcast.net  34.379 ms  33.420 ms  56.441 ms
 8  te-4-1-ur02.newcastlerdc.de.panjde.comcast.net  88.011 ms  37.445 ms  59.218 ms
 9  te-4-1-ur02.newcastlerdc.de.panjde.comcast.net  65.015 ms !P  36.567 ms !P  57.808 ms !P
 

steve1515
Premium Member
join:2000-08-07
Peabody, MA

steve1515

Premium Member

Looks like it's a routing problem in Comcast's network. Do you agree?

Mike Wolf
join:2009-05-24
Tuckerton, NJ

Mike Wolf to steve1515

Member

to steve1515
works for me wth native ipv6

whfsdude
Premium Member
join:2003-04-05
Washington, DC

whfsdude to steve1515

Premium Member

to steve1515
said by steve1515:

Looks like it's a routing problem in Comcast's network. Do you agree?

...or a path MTU problem. Gotta love those tunnels

Others have reported a problems previously. »www.gossamer-threads.com ··· v6/34197

All said, it's probably not that much help to you. Maybe someone at Comcast is willing to reach out here. Bill's scamper results in the v6 ops list seem like there is a pretty clear issue with the load balancer.

RR Conductor
Ridin' the rails
Premium Member
join:2002-04-02
Redwood Valley, CA

RR Conductor to steve1515

Premium Member

to steve1515
It's working for me using Comcast's 6to4 Anycast IPv6.

NetDog
Premium Member
join:2002-03-04
Hollywood, FL

NetDog to steve1515

Premium Member

to steve1515
Working for me via native IPv6..

steve1515
Premium Member
join:2000-08-07
Peabody, MA

steve1515 to whfsdude

Premium Member

to whfsdude
Maybe someone from Comcast will see this tomorrow during business hours and get it fixed.

ComcastTom
Premium Member
join:2009-11-25
Philadelphia, PA

1 recommendation

ComcastTom to steve1515

Premium Member

to steve1515
Folks, We're aware that there is currently an ACL issue blocking ICMP at the last hop. The site is reachable via normal means, but if you are using a tunnel that is constricting your MTU, you will not be able to reach it as PMTUD will fail. We are working on a fix.