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Article #380

Re: US-connectivity problems - at least from Vienna (fwd)

#380
From: Ewald.Jenisch
Date: Fri, 26 Apr 1996 00:00
83 lines
3743 bytes
Liebe ACOnet-Gemeinde,

Wahrscheinlich ist niemand entgangen, dass es "gewisse Probleme" mit
internationaler connectivty gibt.

Der Grund dafuer sind ganze Pulks von BGP up/downs auf der Verbindung
Stockholm-USA. Dadurch kommt es zu Routing-Instabilitaeten, die sich
u.a. so auswirken, dass der Traffic einmal ueber Wien->Paris, einmal
ueber Wien->STH geht.

Das Problem ist an Ebone NOC gemeldet, sie werden's an ICM
weitergeben - Details s.u.

In der Zwischenzeit ... "plase bear with us"...

-ej

-- 
Ewald Jenisch                      |  E-mail: jenisch@cc.univie.ac.at 
Vienna University Computer Center  |          
Universitaetsstrasse 7             |  Tel: (+43 1) 406-58-22 x251  Fax x170
A-1010 Vienna, Austria             |  NIC-Handle: EJ63

------------------------------ < Cut here > ------------------------------

> Subject: Re: US-connectivity problems - at least from Vienna
> From: Bjorn Carlsson <bc@sunet.se>
> Date: Fri, 26 Apr 96 10:48:36 +0200
> 
> Sigh.. Seems like the code in the ICM boxes has been updated, and the new
> code works less than perfect. :-(
> 
> I don't know if I can do much more than report it. 
> 
> --BC
> 
> > Hi Ebone-NOC,
> > 
> > We're seeing a problem with US-connectivity for quite some time now (> 1hr):
> > 
> > Connectivity to the US is interrupted/unstable as seen from the
> > Vienna-EBS1; sometimes traffic is running via STH->US, sometimes via
> > Paris.
> > 
> > 
> > I've taken a look at STH-VIE-EBS:
> > 
> > STH-VIE-EBS#sh ip bgp summ
> > BGP table version is 18630014, main routing table version 18630014
> > 31978 network entries (65314/128396 paths) using 7537368 bytes of memory
> > 3031 BGP path attribute entries using 367524 bytes of memory
> > 2301 BGP route-map cache entries using 36816 bytes of memory
> > 2879 BGP filter-list cache entries using 46064 bytes of memory
> > Dampening enabled. 0 history paths, 0 dampened paths
> > 
> > Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State
> > 192.121.154.25  4  1755 2849703 2378589 18629343    0  424 1:32:09  
> > 192.121.155.5   4  1755  292594 2408032 18629343    0    0 1w1d     
> > 192.121.156.41  4  1755 2271083 2392704 18630012    0    0 2d17     
> > 192.121.156.117 4  1755  125792 2385169 18630012    0    0 3w1d     
> > 192.121.157.25  4  1755  326666 2379333 18539634    0  567 20:33:33 
> > 192.121.158.5   4  1755 2251401 2411241 18630012    0    0 0:24:03  
> > 192.121.159.241 4  1755  237543 2389003 18630012    0    0 21:58:44 
> > 194.68.128.26   4  1883   97002  396722 18629500    0    0 1w1d     
> > 198.67.131.177  4  1800 4182166  644191 18629500    0    0 0:00:53  
> > STH-VIE-EBS#
> > 
> > 
> > BGP-peering with 1800 is going up and down in a matter of minutes.
> > 
> > Is this a known problem? Can we/you do something against it?
> > 
> > Thanks much in advance,
> > -ewald
> > 
> > 
> > -- 
> > Ewald Jenisch                      |  E-mail: jenisch@cc.univie.ac.at 
> > Vienna University Computer Center  |          
> > Universitaetsstrasse 7             |  Tel: (+43 1) 406-58-22 x251  Fax x170
> > A-1010 Vienna, Austria             |  NIC-Handle: EJ63
> 
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From: Ewald.Jenisch@univie.ac.at
Subject: Re: US-connectivity problems - at least from Vienna (fwd)
Date: 1996/04/26
Message-ID: <199604260900.LAA02884@styx.cc.univie.ac.at>
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