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Subject: Re: Some error in packet queuing (cipdrvr?)
From: Damion Wilson <dwilson,AT,ibl,DOT,bm>
Date: Wed, 20 Nov 2002 13:51:57 +0100
In-reply-to: <Pine.LNX.4.44.0211181419110.21144-100000@server2.del>

I'm not even sure how to replicate your problem... The first thing that I do 
when I bring a link up (in testing) is to ping across it.

Can anyone verify this bug/problem ?

DKW

On Wednesday 20 November 2002 04:57 am, Vladimir Michl wrote:
> I thing somewhere in CIPE is error in packet queueuing.
>
> I have this config:
>
> A -- CIPE -- udptunnel --- udptunnel -- CIPE -- B
>
> udptunnel listen for packets from CIPE and send it through firewall to
> other udptunnel.
>
> If I run heavy traffic on CIPE link (udptunnel say me every packet
> received or transmited - I view traffic on side B from side A via VNC
> trougth CIPE tunnel).
>
> On link start ping to other side work.
>
> Than run traffic test (VNC).
>
> After some time, ping to other side not run, but VNC work.
> If some other traffic on link, ping work, if only ping traffic on link,
> ping not work.
>
> Ending udptunnel and starting not resolve problem.
> Ending cipsrvr and starting it not solve problem.
> Restarting machine solve problem.
>
> I try simulate this without udptunnel. After some time, the
> situation is the same. Ping work only if other traffic on link.
> If only ping traffic, ping not work. Restarting cipsrvr not solve problem.
>
> Traffic is generated by VNC to machine B and viewing VNC from machine B
> to machine A. In machine A I have 3 window with pings to machine B which
> generate events for VNC circle.
>
> When I run this test in night to today, morning I see BSOD with
> BAD_POOL_CALLER (0x7, 0xb8a, 0x87facd60, 0x87facd68).
> I don't know if cause this BSOD is in CIPE.
>
> I think that situation is following:
>
> OK:
> ping packet n -> CIPE ->
> ping packet n <- CIPE <-
>
> If ping not work:
> ping packet n -> CIPE ->
> ping packet n-1 <- CIPE <-
>
> ping packets have response, but i thing that response is for (some)
> previous packet.
>
>
> ---------------------------------------------------------------------------
> Vladimír Michl <Vladimir.Michl,AT,hlubocky,DOT,del,DOT,cz>
> Del a.s., Strojírenská 38, &Zcaron;&dcaron;ár nad Sázavou
> pobo&ccaron;ka Olomoucká 355, Hlubo&ccaron;ky-Mariánské Údolí
> tel: +420 585 353 548, fax: +420 585 352 364
> http://hlubocky.del.cz





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