Vlan1 is a logical interface. It will clear with a reload. Remember, VLAN1
is all ports on the VLAN, so if you have 4 or 5 ports in VLAN1 connected to,
say, 24 port hubs, the VLAN collision count will be high.
Remember, that a switch running full duplex will have NO collisions, and a
duplex mismatch will show late collisions if the switch is half and the
other side is full, and CRC errors if the switch is full, and the other side
is half.
Don't worry about collisions on the VLAN, worry about collisions on the
physical interfaces.
-----Original Message-----
From: Kwame [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 19, 2001 2:37 PM
To: [EMAIL PROTECTED]
Subject: Re: Large Collisions on Vlan1 [7:12961]
The counters won't clear. I used the ff command:
CLEAR COUNTERS VLAN1
I'm still seeing the same number of collisions on vlan1. Here's my trunk
configuration. What am I missing?
6509: interface fa2/10
no ip address
duplex full
switchport
switchport trunk encapsulation isl
switchport trunk allowed vlan 1,206,207,1002-1005
switchport mode trunk
!
2905: interface FastEthernet0/1
duplex full
speed 100
switchport trunk allowed vlan 1,206,207,1002-1005
switchport mode trunk
spanning-tree portfast
!
""Hire, Ejay"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> You need to clear the counters and establish a time frame for this. 19
> million collisions isn't a lot in a well loaded switch that has been up
for
> a long time.
>
> If you clear the counters and the number increases quickly, you may have a
> speed or duplex issue or a bad cable. You said this was an ISL trunk so
you
> should manually set both ends at 100 mbps
> (or 1000mbps if you've got the special card for the 2924 and a good port
on
> the 6500) and also manually set the link to full duplex.
>
>
> -----Original Message-----
> From: Kwame [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, July 19, 2001 12:25 PM
> To: [EMAIL PROTECTED]
> Subject: Large Collisions on Vlan1 [7:12961]
>
>
> What does it mean when the "sh int vlan1" output shows large collisions?
For
> example on a 2924 XL with an ISL trunk to a 6509 I go the ff output upon
> issuing the SH INT VLAN1 command:
>
> 0 output errors, 19108404 collisions, 0 interface resets
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