Re: (PM) IRX troubles

John G. Thompson (jgt10@livingston.com)
Wed, 24 Feb 1999 16:50:32 -0800

At 08:26 PM 02/22/99 -0600, Joseph Covey wrote:
>I'm getting this info constantly when I "set console"
>
>This is a 1 minute snip of the messages....
>
>router> ver
>Livingston PortMaster IRX ComOS 3.7.2R
>System uptime is 17 hours 40 minutes
>
>router> sh mem
>System memory 1048576 bytes - 742524 used, 306052 available
>32:6 176:0 1152:0 640:0 96:0 128:0 160:0 80:7 16:153 256:1 48:2
>System nbufs 1100 - 67 used, 1033 available

Memory looks good.

>router> set console
>Setting CONSOLE to admin session
>
>router> net: Bad wanted 44, got 40

Hmm. Looks like you might also have a problem on the local ethernet
segment. Take a look at a show netstats for ether0. With that output look
at...

http://www.livingston.com/tech/technotes/300/300007.html

and see what shape you local network is in.

>sync_device_check (S3): Restarting Receiver
>sync_device_check (S1): Restarting Receiver
>sync_device_check (S1): Restarting Receiver
>net: Bad wanted 48, got 40
>S1 DMA: Recieve Buffer Full
>net: Bad wanted 163, got 60
>net: Bad wanted 48, got 40
>net: Bad wanted 48, got 40
>S1 DMA: Recieve Buffer Full
>net: Bad wanted 41, got 40
>S3 dma: Recieve Buffer Full
>sync_device_check (S1): Restarting Receiver
>net: Bad wanted 380, got 40
>S1 DMA: Recieve Buffer Full
>net: Bad wanted 44, got 40
>net: Bad wanted 44, got 40
>net: Bad wanted 44, got 40
>net: Bad wanted 244, got 40
>net: Bad wanted 48, got 40

Looks like a toss up between a problem on the local ethernet and on the S1
and S3 leased lines.

If the local ethernet is overloaded as indicated by the "Bad wanted"
message it is possible that the IRX can't get the incoming packets out fast
enough, which is causing the "Receive Buffer Full" error.

As for the synch device check..I don't know. I have an idea that it has to
do with a problem with the clock signal on the receive side skewing too
much, but I don't have enough information to prove it.

Hope that helps!

JGT
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John G. Thompson Technical Support STAFF Engineer aka JOAT(MON)

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