log error

[dkblee]

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.

[cisco_lad2004]

Ensure MTU size is same size in interfaces between Router and Switch.

HTH

Sam

[dkblee]

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.

[cisco_lad2004]

sh int x/y | inc MTU

This must be checked on both adjacent devices Link interfaces.

Sam

[dkblee]

hi! Thks....any idea what does it mean by MROUTE-4-MTU ?

[Jayakrishna Mada]

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.

[dkblee]

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.