Level3 issues from Denver to San Jose?

Wed Dec 1 09:57:13 UTC 2010

On Tue, Nov 30, 2010 at 11:22:41PM -0700, Khurram Khan wrote:
> I'm seeing some packet loss out of one of my routers in San Diego, we peer
> with L3.
> 
> ping 4.69.132.57 so gi3/8 repeat 1000 size 5000
> 
> Type escape sequence to abort.
> Sending 1000, 5000-byte ICMP Echos to 4.69.132.57, timeout is 2 seconds:
> Packet sent with a source address of x.y.d.z
> !!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!
> !.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!
> !!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!!
> !!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!
> !!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!
> !!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!
> !!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!!!!
> !!!!!!!!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!!.!!!!!!!!!!!!!.!!!
> !!!!!!!!!!!.!
> Success rate is 93 percent (534/573), round-trip min/avg/max = 20/27/204 ms

That's most probably ICMP rate-limiting by Level3 - notice the regular
pattern. Judging from the reverse DNS of your ping target, this is a
Juniper router interface that you are pinging.

Best regards,
Daniel

-- 
CLUE-RIPE -- Jabber: dr at cluenet.de -- dr at IRCnet -- PGP: 0xA85C8AA0