Etherchannel load balancing and redundancy

Answered Question
Nov 18th, 2008
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Hi,


I config a 4+1 port etherchannel as:


port-channel load-balance dst-ip

interface Port-channel1

lacp max-bundle 4


What will happen if one of the active interface (for example the 3rd interface) in port-channel1 fail? Will the algorithm re-calculate the hashing? Or just switch the traffic from 3rd port to the backup port?

Correct Answer by Giuseppe Larosa about 8 years 4 months ago

Hello Alex,

the most efficient move is the second: the backup link takes the place of the failed link.


It should be possible because LACP messages are exchanged also on hot standby / backup links so the two devices can make a change on the fly with the backup link.


Hope to help

Giuseppe


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Correct Answer
Giuseppe Larosa Wed, 11/19/2008 - 00:16
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Hello Alex,

the most efficient move is the second: the backup link takes the place of the failed link.


It should be possible because LACP messages are exchanged also on hot standby / backup links so the two devices can make a change on the fly with the backup link.


Hope to help

Giuseppe


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