06-01-2009 04:58 AM - edited 03-06-2019 06:01 AM
hi! I've the following error in my routers and switch. Is this a hardware error? or what can i do to rectified this? Thanks.
Core Switch
------------
corp2> (enable) sh counters supervisor
Forwarding Engine Error Stats Counters
======================================
IP len against Physical length err = 0
IP min. length check error = 0
IP pkts with cksum error = 4
IPX len against Physical length err = 0
IPX min. length check error = 0
Routers
-------
%MROUTE-4-MTU_MISMATCH: WARNING: With IP multicast enabled, in
terfaces which transmit traffic from larger to smaller MTU interfaces may not be
hardware switched due to fragmentation. A degradation in performance may occur.
06-01-2009 05:17 AM
Ensure MTU size is same size in interfaces between Router and Switch.
HTH
Sam
06-01-2009 09:00 AM
hi! how do i check that?...it's a c6509, with sup and the sw module.
I checked that all the vlan intefaces' mtu are all the same, i think it's using the default value.
06-01-2009 09:03 AM
sh int x/y | inc MTU
This must be checked on both adjacent devices Link interfaces.
Sam
06-01-2009 05:22 PM
hi! Thks....any idea what does it mean by MROUTE-4-MTU ?
06-01-2009 10:45 PM
IP pkts with cksum error = 4 means that switch has received a bad packet ( packet with checksum error).
The other messages is just a informational message.
06-02-2009 01:24 AM
hi! for the message at the switch above....will that cause any issue? The reason is that, we encountered slow internet access over one of the core switch, but i did not see any error or checksum, crc error in the interface level. The other core which works fine...do not have that error.
Thanks.
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