3548 Gigabit Stack

[lwhalley]

I have two 3548XL switches in a stack using a GBIC connector. The response time from the member stack seems significantly higher than the response time from the controller. I have changed the duplex to half, which has helped somewhat. Is there any other configurations that I should check?

[efransua]

Do you have the following config on your Gig interfaces.

interface GigabitEthernet0/1

duplex half

switchport mode trunk

When stacking just 2 3548 you can run full duplex.

If you are pinging the second contorller switches uslly have a high ping respone, but if you ping a work station the ping will be fine.

You also need to have enterprise software.

[lwhalley]

I'm runnning Version 12.0(5)XU, which came with the switch. I think that it is enterprise software.

That is the configuration that I currently have. I also have the lines:

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 1-10,1002-1005

[demetris.taylor]

Since you are allowing all of the default VLANs try replacing

switchport trunk allowed vlan 1-10,1002-1005

with

switchport mode trunk

This may speed things up telling the switch to pass all VLANs insteading having the switch decide which ones