Hi,
First time post here. I would like some guidance if possible on troubleshooting redundant fiber links between 3 switches at the access layer and then a central switch at the distribution layer, which then goes to a router. All switches are just working at layer two. With the router doing doing all the layer 3 stuff. I have included a picture of the layout. This is only showing the fiber trunks between the switches.
My question is this. If one of the links go down say sw1 2/0/49. To test this port I take the working fiber connection from from sw1 1/0/50 ( which goes to sw3) and put it into Unit 2 2/0/49 to see if it might be a cable or port issue on sw2. All Vlan's are the same through out.
All fiber ports are configured the same on sw1, with only the description and channel-group being different:
T2409swt0001#sh run int gi 1/0/49
Building configuration...
Current configuration : 244 bytes
!
interface GigabitEthernet1/0/49
description IDF 2 - T2409swt0002
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1-79,81-4094
switchport mode trunk
snmp trap mac-notification change added
channel-group 2 mode on
end
I was told we are not allowed to move the fiber from any trunk port that is assigned to a different switch for troubleshooting. Is there a good reason for this? I think I just figured it out. It seems obvious after drawing this out that the main difference here is the channel-groups or I believed they are also called ether-channel. I haven't got to this in my studies yet, obviously I need to. It seems to me that that will cause a problem by trying to split the same channel-group to two switches right?
Thanks!
Mike
