Been fighting with this one myself, if it's the same problem.
Sun boxes like to auto negotiate their connection. If the Cisco is set to
full 100, full dup you will see FCS errors or at least on 29xx and 55xx in
my experience. Try setting your switch to auto negotiate the connection.
The only problem this introduces is that when you reboot the switch your
Sun machines may negotiate a lower connection, usually half dup/100.
Resetting the connection will cause it to pick the higher setting the next
time around. I think it has something to do with the way the Cisco boots.
There may also be a way to make the Sun box happy with being told what its
connection should be. I've heard rumors, but haven't found anything that
actually worked.
Kashani
At 10:06 PM 11/26/99 -0500, Deepak Jain wrote:
>One of our internal C1900s is generating a bunch of FCS errors on its
>100Mbit B port:
>
> Catalyst 1900 - Port B Statistics Report
> Receive Statistics Transmit Statistics
>------------------------------------- -------------------------------------
>Total good frames 134549 Total frames 116033
>Total octets 93924939 Total octets 10939182
>Broadcast/multicast frames 1 Broadcast/multicast frames 692
>Broadcast/multicast octets 64 Broadcast/multicast octets 47891
>Good frames forwarded 134549 Deferrals 0
>Frames filtered 0 Single collisions 0
>Runt frames 435 Multiple collisions 0
>No buffer discards 0 Excessive collisions 0
> Queue full discards 0
>Errors: Errors:
> FCS errors 4185 Late collisions 0
> Alignment errors 0 Excessive deferrals 0
> Giant frames 11 Jabber errors 0
> Address violations 0 Other transmit errors 0
>
>---
>
>This port is generating about 100-140 FCS errors per update interval (~1 sec)
>connected directly to a Sun Ultra @ 100MBit/s FD. The server is averaging
>about 10-20Mbit/s of traffic. Store and Forward was off, but then turned
>on after the Cisco site recommended using S&F to prevent FCS frames from
>being filtered.
>
>What is wrong (if anything)? there seems to be a consensus that high speed
>connects can draw FCS errors.
>
>Thanks,
>
>Deepak Jain
>AiNET
>
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