12-20-2010 04:40 AM - edited 03-06-2019 02:37 PM
I created a 4gig etherchannel from our core/root switch to our distaster recovery switch with no problems. The core/root switch is a 6509 IOS switch and the disaster recovery switch is a 6509 CATos switch. Today I tried to create a redundant 4gig etherchannel from the disaster recovery switch to our other core/backup switch which is a 6509 IOS switch.
This is the output from the show commands of the IOS 6509 core/backup switch:
show interface status:
Gi4/1 Bundle to DR connected trunk full 1000 1000BaseSX
Gi4/2 Bundle to DR connected trunk full 1000 1000BaseSX
Gi4/3 Bundle to DR connected trunk full 1000 1000BaseSX
Gi4/4 Bundle to DR connected trunk full 1000 1000BaseSX
Po220 notconnect 0 full auto
show ether summary:
220 Po220(SD) PAgP Gi4/1(I) Gi4/2(I) Gi4/3(I) Gi4/4(I) The legend says Stand alone.
sh spanning-tree:
Gi4/1 Desg FWD 4 128.385 P2p
Gi4/2 Desg FWD 4 128.386 P2p
Gi4/3 Desg FWD 4 128.387 P2p
Gi4/4 Desg FWD 4 128.388 P2p
This is the output from the show commands of the CATos 6509 switch:
show port:
5/1 Bundle to OCR notconnect 1 full 1000 1000BaseSX
5/2 Bundle to OCR notconnect 1 full 1000 1000BaseSX
5/3 Bundle to OCR notconnect 1 full 1000 1000BaseSX
5/4 Bundle to OCR notconnect 1 full 1000 1000BaseSX
show spantree:
5/1 1 not-connected 4 32 disabled 0
5/2 1 not-connected 4 32 disabled 0
5/3 1 not-connected 4 32 disabled 0
5/4 1 not-connected 4 32 disabled 0
Is this expected behavior, instead of blocking the ports?
12-20-2010 04:59 AM
If you are sure you have layer 1 connectivity it will usually tell you in the logs why the channel was not created if you used negotiated etherchannels . Seeing it says "notconnect" you don't even have layer 1 connectivity at this point .
12-20-2010 05:08 AM
The IOS switch says connected though? Would it say that if there wasn't a link to the CATos?
12-20-2010 05:36 AM
Do you think this could be the problem? The mode is set to on with the working channel and nonegotiate for the non-working channel.
Working channel-
3/1 on dot1q trunking 1
3/2 on dot1q trunking 1
3/3 on dot1q trunking 1
3/4 on dot1q trunking 1
Not working channel-
5/1 nonegotiate dot1q not-trunking 1
5/2 nonegotiate dot1q not-trunking 1
5/3 nonegotiate dot1q not-trunking 1
5/4 nonegotiate dot1q not-trunking 1
12-20-2010 05:43 AM
On the not connected side try doing a "shut then a no shut on the port channel SVI . If for some reason the switch put it
into a err-disable state this would bring it back up . Also verify that you have the cable where you think they are , I would think it would be not connect on both sides if one side was err-disabled.
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