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runts error on a trunk port between pix and catalyst

efluxa
Level 1
Level 1

I'm reporting a lot of input errors and runts errors

on switch port (catalyst 3548xl ios ver 12.0(5.3)WC1 ) in trunk with a pix515 (ver. 6.3(4))

There's no auto-negotation problem, I've tried to fix "100full" and "auto" on both ports but the errors on the catalyst continue to increase.

Interfaces on pix:

interface ethernet0 100full

interface ethernet1 auto

interface ethernet1 vlan5 logical

interface ethernet1 vlan6 logical

...

nameif vlan5 dmz_public_server security50

nameif vlan6 fw-to-ir security80

...

on the catalyst:

interface FastEthernet0/4

description "trunk dot1q to pix"

switchport trunk encapsulation dot1q

switchport mode trunk

spanning-tree portfast

no cdp enable

Here the errors on the switch port:

5 minute input rate 124000 bits/sec, 9 packets/sec

5 minute output rate 24000 bits/sec, 38 packets/sec

43037 packets input, 44948989 bytes

Received 0 broadcasts, 4009 runts, 0 giants, 0 throttles

4009 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 0 multicast

Also I've tried to allow only the two vlans on the switch interface, but nothing is changed.

Thanks in advance

Luca

1 Reply 1

Patrick Iseli
Level 7
Level 7

RUNT errors

Take a look this link, I have no idea if that is the problem but could be a good point to start troubleshooting the problem.

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

RUNT:

A runt is an undersized packet (less than 64 bytes) with a valid CRC. Packets less than 64 bytes with an invalid CRC are counted as fragments.

sincerely

Patrick

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