nanog mailing list archives
Re: A BGP issue?
From: Viral Vira <viraviralh () gmail com>
Date: Tue, 8 Mar 2011 18:20:57 +0530
I have seen this kind of problems in our customers networks and this is motly related to MTU/MSS. Network reachability is fine but applciations does not work. Apply the MSS on the LAN interface which is around 100 bytes less than the MTU on the WAN interface. -Thanks, Viral. On 8 March 2011 16:11, Vadim Antonov <avg () kotovnik com> wrote:
On Tue, 2011-03-08 at 09:25 +0200, Hank Nussbacher wrote:At 21:49 07/03/2011 -0500, Patrick W. Gilmore wrote:On Mar 7, 2011, at 14:27, Greg Ihnen <os10rules () gmail com> wrote:I run a small network on a mission base in the Amazon jungle which isfed by a satellite internet connection. We had an outage from Feb 25thtothe 28th where we had no connectivity with email, http/s, ftp, Skype would indicate it's connected but even chatting failed, basically everything stopped working except for ICMP. I could ping everywherejustfine. I started doing traceroutes and they all were very odd, all not reaching their destination and some hopping all over creation before dying. But if I did traceroute with ICMP it worked fine. Does this indicate our upstream (Bantel.net) had a BGP issue? Bantel blamed Hughesnet which is the service they resell. I'm wondering what kind of problem would let ping work fine but not any of the other protocols. It also seems odd that I could traceroute via UDP part way to adestinationbut then it would fail if the problem was my own provider. Thanks.If this is the wrong forum for this post I'm sorry and please justhitdelete. If this is the wrong forum but you'd be kind enough to shareyourexpertise please reply off-list. Thanks! Honestly, I would rate this as one of the most on-topic posts in awhile.+1. When you have http working I suggest running: http://netalyzr.icsi.berkeley.edu/index.html to give you a benchmark of what your connection can do in the way ofprotocols.Regards, HankGreg - you may want try doing pings with large packets. You may have MTU mismatch or some other problem with a link with lets small ICMP pings through but mangles or discards large packets. --vadim
Current thread:
- A BGP issue? Greg Ihnen (Mar 07)
- Re: A BGP issue? Patrick W. Gilmore (Mar 07)
- Re: A BGP issue? Hank Nussbacher (Mar 07)
- Re: A BGP issue? Vadim Antonov (Mar 08)
- Re: A BGP issue? Viral Vira (Mar 08)
- Re: A BGP issue? Hank Nussbacher (Mar 07)
- Re: A BGP issue? Greg Ihnen (Mar 08)
- Re: A BGP issue? Patrick W. Gilmore (Mar 08)
- Re: A BGP issue? Patrick W. Gilmore (Mar 07)