12-07-2006 09:52 AM - edited 03-11-2019 02:05 AM
We have a physical interface that has 2 vlans on it. On show interface, there is the following:
21450335 invalid VLAN ID errors, 61212 native VLAN errors
The invalid VLAN ID errors are incrementing by about 120 a minute....does anyone have any ideas what causes them? There's nothing in the logs. Is it a config problem on a host?
Thanks
J
12-07-2006 03:28 PM
hello J,
Can you post us the configs please? probably there are some mismatches on the native vlan configured on the switch and the PIX firewalls... usually on a well-configured PIX, u will not get such errors... First, make the switch with plain configs (only configure trunk) and see if u get these errors...
Raj
12-08-2006 01:31 AM
Many thanks Raj for your response.
Well here is a section of the config:
interface ethernet1 100full
interface ethernet1 vlan30 physical
interface ethernet1 vlan1 logical
nameif ethernet1 A security100
nameif vlan1 B security85
ip address A 192.168.1.0 255.255.255.0
ip address B 192.168.2.0 255.255.255.0
Unfortunately this is a live environment so I can't play around with it.
Any idea what the errors indicate?
Thanks,
J
12-08-2006 01:21 PM
Well, the pix considers the physical interface the 'native' vlan - are you sure the native vlan configured on the trunk is vlan 30?
I'm assuming that the 192.168.1.0 network is working?
Also - can you send us the configuration for that portion of the switch (the trunk?)
--Jason
12-13-2006 04:23 AM
Hi Jason,
Many thanks for your response.
The native vlan on the trunk port is 1 (default). Do you think that's where the problem lies - for VLAN ID errors and native ID errors?
interface FastEthernet1/0/1
switchport trunk encapsulation dot1q
switchport mode trunk
no logging event link-status
duplex full
speed 100
no snmp trap link-status
no mdix auto
end
Thank you,
J
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