satchelllowe
asked on
Cisco 2950 port configuration when connecting to another switch
I have a problem at the moment where i need to connect an Extreme switch to my Cisco 2950 switch. The problem is that the port light comes up amber and does not pass any frames across to the VLAN.
The switch port on my Cisco 2950 has the following configuration:
interface FastEthernet0/10
description INSIDE spare
switchport access vlan 99
switchport mode access
switchport nonegotiate
!
Spanning-Tree is implemented on VLAN 99
Until yesterday port-fast was also enabled on this port. However i was lead to believe that this could be adding to the problem. Could you please advise me on how the switch should be configured to connect the the Extreme switch successfully?
Unfortunately i dont have any visability of the Extreme switch.
Thanks
The switch port on my Cisco 2950 has the following configuration:
interface FastEthernet0/10
description INSIDE spare
switchport access vlan 99
switchport mode access
switchport nonegotiate
!
Spanning-Tree is implemented on VLAN 99
Until yesterday port-fast was also enabled on this port. However i was lead to believe that this could be adding to the problem. Could you please advise me on how the switch should be configured to connect the the Extreme switch successfully?
Unfortunately i dont have any visability of the Extreme switch.
Thanks
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Why is nonegotiate configured? Try doing this and see if it helps:
interface FastEthernet0/10
no switchport nonegotiate
interface FastEthernet0/10
no switchport nonegotiate
I would also check with the Extreme administrator how that port is configured. Is it configured to trunk or channel? If these are hard-configured on, the Cisco port won't come up and may log errors, and the Extreme port may do the same. You might look at the log on the Cisco switch with "sho log" and see if there are any errors. The errors will help you determine what you need to work out with the other admin.
Do this:
1. shut down the port on the cisco switch.
2. If you're on the console, make sure that messages log to the console. If you're remote, type "terminal monitor."
3. Turn up the port and see if there are any errors that show up. These should be logged also.
If the port goes down because of errors, the only way to bring it up is to shut down and no shut it. The switch will not administratively shut it down.
Do this:
1. shut down the port on the cisco switch.
2. If you're on the console, make sure that messages log to the console. If you're remote, type "terminal monitor."
3. Turn up the port and see if there are any errors that show up. These should be logged also.
If the port goes down because of errors, the only way to bring it up is to shut down and no shut it. The switch will not administratively shut it down.
nonegotiate will have no effect since the port is being forced into access mode.
True. On the other hand, it doesn't belong there in this scenario.
ASKER
The problem was with the BPDUs. Thanks for all your help.
Are there any other paths from the Extreme switch back to the 2950 other than the link to fa0/10 through another switch?
What does the output of a "show spanning-tree vlan 99" show (port status for f0/10)?
How about "show interface status"?
-Don