Hi.
I have 2 3750 running IOS 12.2(35)SE5. Today I lost power to one switch in one of the stacks.
Since I've configured etherchannel, it should work fine. But it didn't. The switch in the opposite end, reported interface Gi1/0/1, Gi2/0/1 and Po1 down. No further logging in neither of the switches.
Why didn't the etherchannel configuration keep the trunk up?
Have I missed something, is there a bug in the IOS release or why did this happen?
Logging inn to one of the switches, issuing shut no shut on the interfaces (int gi1/0/1 and int po1) makes the interfaces come up.
I'm searching google for answers, while I'm hoping one of you guys can help me.
Br
Geir
SWITCHSTACK1 SWITCHSTACK2
----------------------- -----------------------
Switch1-1 gi1/0/1 <-----> gi1/0/1 Switch2-1
Switch1-2 gi2/0/1 <-----> gi2/0/1 Switch2-2
----------switch 2--------------------
switch1#sh run int gi1/0/1
!
interface GigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 998
switchport trunk allowed vlan 456,800-849,998
switchport mode trunk
switchport nonegotiate
storm-control broadcast level 5.00
storm-control multicast level 10.00
channel-group 1 mode active
end
switch1#sh run int gi2/0/1
!
interface GigabitEthernet2/0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 998
switchport trunk allowed vlan 456,800-849,998
switchport mode trunk
switchport nonegotiate
storm-control broadcast level 5.00
storm-control multicast level 10.00
channel-group 1 mode active
end
switch1#sh run int po1
!
interface Port-channel1
description Etherchannel mot Digiplex
switchport trunk encapsulation dot1q
switchport trunk native vlan 998
switchport trunk allowed vlan 456,800-849,998
switchport mode trunk
switchport nonegotiate
end
switch1#
----------switch 2--------------------
switch2#sh run int gi1/0/1
!
interface GigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 998
switchport trunk allowed vlan 456,800-849,998
switchport mode trunk
switchport nonegotiate
storm-control broadcast level 5.00
storm-control multicast level 10.00
channel-group 1 mode active
end
switch2#sh run int gi2/0/1
!
interface GigabitEthernet2/0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 998
switchport trunk allowed vlan 456,800-849,998
switchport mode trunk
switchport nonegotiate
storm-control broadcast level 5.00
storm-control multicast level 10.00
channel-group 1 mode active
end
switch2#sh run int po1
!
interface Port-channel1
description Etherchannel mot Digiplex
switchport trunk encapsulation dot1q
switchport trunk native vlan 998
switchport trunk allowed vlan 456,800-849,998
switchport mode trunk
switchport nonegotiate
end
