nanog mailing list archives
Re: Weird Issues within L3
From: Stephen Satchell <list () satchell net>
Date: Tue, 07 Oct 2014 16:27:09 -0700
On 10/07/2014 11:36 AM, Khurram Khan wrote:
Hi Group, We have a couple of circuits , internet facing with Level 3 and from our edge in San Diego, seeing some packet loss when trying a ping to 4.2.2.4, sourcing from 63.214.184.3. anyone seeing a similar issue ? Packet sent with a source address of 63.214.184.3 !.!!!.!!!!!!!!!!!!!...!!!..!!!!!!.!!.!!!!!!.!..!!.!!.!!!!!!!!!!!!!!!!! !!!!!!!!!.!!.!!!..!!!!!.!!!!.! Success rate is 80 percent (80/100), round-trip min/avg/max = 12/13/16 ms
I'm not with level3, but the pattern looks exactly like what happens when a destination node has rather severe rate-limiting in place, and multiple people are sending ICMP. Try spacing your ping packets. On Linux, the command switch is "ping -i 3" to send packets every three seconds; for MTR it's "mtr -i 3" -- If you are using something else, there should be an "interval" parameter that you can set to minimize rate-limiting effects. Have you tried sending real traffic to 4.2.2.4, and looking at the packet traffic?
Current thread:
- Weird Issues within L3 Khurram Khan (Oct 07)
- RE: Weird Issues within L3 Naslund, Steve (Oct 07)
- re: Weird Issues within L3 Nick Olsen (Oct 07)
- Re: Weird Issues within L3 Blair Trosper (Oct 07)
- Message not available
- Re: Weird Issues within L3 Khurram Khan (Oct 07)
- Re: Weird Issues within L3 Stephen Satchell (Oct 07)