how to do etherchannel

Answered Question
Jul 16th, 2010

hi

currently my cat6500 (vss) two 10 gig ports link to another cat6500 ( no vss). I want to make etherchannel to bind them and make a 20g link.

if I configure as below, will it has any problem? I guess I will put VSS as channel active mode, and another cat6500 which link to internet will set channel mode passive, is it correct?

interface Portchannel1

switchport

swithport trunk encapsulation dot1q

swithport mode trunk

switchport nonegotiate

udld port

mls qos trust dhcp

spanning-tree link-type point-to-point

interface TenGigabitEthernet1/13/1

  switchport

  swithport trunk encapsulation dot1q

  swithc mode trunk

  switchport nonegotiate

  udld port

  mls qos trust dscp

  spanning-tree link-type point-to-point

  channel-protocol lacp

  channel-group 1 mode active

any comments will  be apprecaited

thanks in advance

julxu

I have this problem too.
0 votes
Correct Answer by Reza Sharifi about 6 years 6 months ago

not sure if I understand what you mean by virtual domain.  If you are planning to create a VSS pair, they both will be in the same domain.  If you have multiple VSS pairs then each pair need to be in a separate domain

HTH

Correct Answer by Reza Sharifi about 6 years 6 months ago

Hi julxu,

If I understand you question correctly, you have an access layer 6500 switch that needs to connect to a pair of VSS switches.  If that is the case, Cisco's recommendation is to use PAGP, so the Etherchannel can be used for Dual-active detection mechanism.  For Dual-active detection LACP is not supported.

HTH

Reza

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Correct Answer
Reza Sharifi Fri, 07/16/2010 - 08:09

Hi julxu,

If I understand you question correctly, you have an access layer 6500 switch that needs to connect to a pair of VSS switches.  If that is the case, Cisco's recommendation is to use PAGP, so the Etherchannel can be used for Dual-active detection mechanism.  For Dual-active detection LACP is not supported.

HTH

Reza

Correct Answer
Reza Sharifi Fri, 07/16/2010 - 14:09

not sure if I understand what you mean by virtual domain.  If you are planning to create a VSS pair, they both will be in the same domain.  If you have multiple VSS pairs then each pair need to be in a separate domain

HTH

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