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Community Member

Trunking problem

I have a 5500 that one SUP w/ uplink will not go into trunk mode for anything. Currently it looks like this:

Port Name Status Vlan Level DuplexSpeed Type

----- ------------------ ---------- ---------- ------ ------ ----- ------------

1/1 Trunk to SW01 5/5 connected trunk high full 100 100BaseFX MM

1/2 Trunk to SW02 5/5 connected trunk high full 100 100BaseFX MM

2/1 standby 1 high full 100 100BaseFX MM

2/2 standby 1 high full 100 100BaseFX MM

When I try to connect on of the fibers to either trunk 2/1 or 2/2 nothing happens and stays in "standby mode". Is this right or do you think the uplink may be bad? More info below to support the topology:

sh mod

Mod Slot Ports Module-Type Model Sub Status

--- ---- ----- ------------------------- ------------------- --- --------

1 1 2 100BaseFX MMF Supervisor WS-X5530 yes ok

2 2 2 100BaseFX MMF Supervisor WS-X5530 yes standby

...

...

Mod Port Model Serial # Versions

--- ---- ---------- --------- ----------------------------------------

1 2 WS-X5530 015451087 Hw : 3.4

Fw : 5.1(2)

Fw1: 4.4(1)

Sw : 5.5(20)

WS-F5521 015447174 Hw : 2.0

WS-U5533 022520397 Hw : 1.0

2 2 WS-X5530 015451050 Hw : 3.4

Fw : 5.1(2)

Fw1: 4.4(1)

Sw : 5.5(20)

WS-F5521 015450793 Hw : 2.0

WS-U5533 022353263 Hw : 1.0

I get this error when trying to put into channel mode too:

set port channel 2/1-2 mode desirable non-silent

"Failed to set port(s) 2/1-2 channel mode to desirable"

3 REPLIES
Community Member

Re: Trunking problem

Please ensure that the ports are allowing the exact same set of vlan's on them before bundling them in an etherchannel.

Better yet, please review the URL below and there is a good chance that you may resolve your issue after reading it:

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_5_5/sw_cfg/channel.htm

Re: Trunking problem

Images later than 4.3 on cat 5500 puts the uplink ports on the redundent sup as inactive.You have to enable those ports on the sup to become active and use as normal uplink ports. run " set standbyports enable " on the sup and you redundent uplink ports will become active and can be used.

You migh want to see the ports support Ether-channeling or not so just run the command " show port capabilities 2/1 or 2/2 " and will tell you the status.

HTH,

-amit singh

Community Member

Re: Trunking problem

Thanks for your help that did the trick!

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