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New Member

port-channel question for RSM int G3 & G4

Hello all, I'm sure someone can help me out with this one....... I have two 4006's and each have RSM's in SLOT 2. I'm seeing some route flapping between my port-channel from the SUP II's point of view. I have those 2/1-2 port-channelled and trunked. Can someone review the output that I have provided and let me know what's going on????

CORE-A> (enable) show channel group 2

Admin Port Status Channel Channel

group Mode id

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

2 2/1 connected on 801

2 2/2 connected on 801

Admin Port Device-ID Port-ID Platform

group

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

2 2/1 Not directly connected to switch

2 2/2 L3-RSM-A GigabitEthernet4 cisco Cat4232L3

Here is the CORE-B switch output..............( it's almost the same but look @ 2/2, it's opposite from CORE-A's output ?????????)

CORE-B> (enable) show channel group 2

Admin Port Status Channel Channel

group Mode id

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

2 2/1 connected on 801

2 2/2 connected on 801

Admin Port Device-ID Port-ID Platform

group

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

2 2/1 L3-RSM-B GigabitEthernet3 cisco Cat4232L3

2 2/2 Not directly connected to switch

Here are the "show trunk command outputs"...............

CORE-A> (enable) show trunk 2/1

* - indicates vtp domain mismatch

Port Mode Encapsulation Status Native vlan

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

2/1 nonegotiate dot1q trunking 1

CORE-A> (enable) show trunk 2/2

* - indicates vtp domain mismatch

Port Mode Encapsulation Status Native vlan

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

2/2 nonegotiate dot1q trunking 1

Here is CORE-B's output for the trunk mode..............

CORE-B> (enable) show trunk 2/1

* - indicates vtp domain mismatch

Port Mode Encapsulation Status Native vlan

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

2/1 nonegotiate dot1q trunking 1

CORE-B> (enable) show trunk 2/2

* - indicates vtp domain mismatch

Port Mode Encapsulation Status Native vlan

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

2/2 nonegotiate dot1q trunking 1

*NOTICE* I have boths module 2/1-2 trunking modes in NONEGOTIATE due to those backplane channels connecting to the RSM's, I wanted to force that trunk and not generate any DTP frames. Can someone help me out ??

Thanks in Advance,

Alonzo

  • Other Network Infrastructure Subjects
3 REPLIES
Cisco Employee

Re: port-channel question for RSM int G3 & G4

I looks like it is setup well. But, I don't see the whole config. Make sure you follow this link step-by-step.

http://www.cisco.com/warp/public/473/28.html#Sample config

You will not have a problem. I have given it out to thousands of customers.

Cisco Employee

Re: port-channel question for RSM int G3 & G4

The port channel showing up as "Not directly connected to switch" is a known cosmetic bug

http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdp04017

This is a known IOS s/w bug. When channeling in ON mode, the ports show the neighbor info using CDP data. The IOS s/w sends out CDP packets on both channel interface and physical interfaces. One of the cat ports sees multiple CDP neighbors and reports "not directly connected to switch."

You might also want to look at a previous posting for similar question

http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&CommCmd=MB%3Fcmd%3Ddisplay_location%26mode%3Dnew%26location%3D.ee84ef3

New Member

Re: port-channel question for RSM int G3 & G4

Thank you for your help. I don't like the way it looks but is from what your saying it should NOT impact performance right?

~Alonzo

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