CRC Errors on 520 and 525..URGENT

[ciscobuddy]

Hi,

I have pix 525 and 520 , and i am getting CRC errors on my DMZ interface. wants to clear the counter for that particular interface. wht is the command for that, and if i clear the interface is connectivity loss is there. i mean who ever is connected to that DMZ ,can we loss that connectivity for time being.

pls help me ....very urgent

Thanks & Regards,

Ciscobuddy

[Patrick Iseli]

clear interface

Clear counters for the show interface command.

But you cannot define which interace. This will not reset any sessions just clear the counters.

Command reference:

http://www.cisco.com/en/US/products/sw/secursw/ps2120/products_command_reference_chapter09186a00801727a6.html#wp1091147

sincerely

Patrick

[ciscobuddy]

Hi,

Thanks for ur reply, it is ethernet2 that is my dmz.

pls suggest me if anything is there. i am on customer site.and pix is in production. so is there any problem to clear the counter. is production loss is there ?

pls advise me

Thanks & Regards,

Ciscobuddy

[Patrick Iseli]

NO, I just tryed that on my PIX, I was downloading a large file and did a reset of the counters. There was no lost of the session.

do:

conf t

clear interface

YEAH, I have seen on your other post that you executed "clear xlate". This command has defenitly reset all sessions in your production. Take care with that command.

sincerely

Patrick

[ciscobuddy]

Hi Patrick,

Thanks again for ur reply, is this command clear all the interface on PIX. or i can clear only ethernet 2. sorry that i am asking you the silly questions, coz i never work on PIX.

pls advise me.

Thanks & Regards,

Ciscobuddy

[ciscobuddy]

Hi Patrick,

i hv cleared the interface. but still i am getting crc,input errors and ignored packet. can you pls advise me on this issue.

Thanks & Regards,

Ciscobuddy

[Patrick Iseli]

There might be a host in difficulty to send packets, I have no idea if it is a NIC that is defective.

I will see what I can figure out about CRC. Basicly

the content of a packet has changed in transmition and the the PIX reject them, bad packets. This is a

Layer 2 problem not a routing issue.

In between figure out what is the source host that produces them. Put a packet sniffer into the DMZ.

If you have a Switch, check also the interface statistic on that switch that might help.

sincerely

Patrick

[Patrick Iseli]

CRC Errors on pix interface.

Take a look at his links that might give a new direction to troubleshoot your problem.

http://support.intel.com/support/express/switches/sb/CS-014410.htm

http://www.computerhope.com/issues/ch000430.htm

http://support.3com.com/infodeli/tools/netmgt/tncsunix/product/091500/c11ploss.htm#20985

sincerely

Patrick

[krachtor]

Hi,

please check the following configuration on your pix interface and the connected interface on the other side:

- speed

- duplex

This settings should be the same. If your configuration looks like 'auto/auto', so configure fixed details, i.e. 100/full.