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PortChannel and loadbalancing.

stephen2615
Level 3
Level 3

Greetings,

When using portchannels, what method (if any) is used to do load balancing if that is the correct terminology here. Eg, is all the data going through the port channel equally spread across the links?

Regards

Stephen

1 Reply 1

tblancha
Cisco Employee
Cisco Employee

We use (by default) the source/destination/OXID id loadbalancing. The OXID is the exchange identifier in a fibre channel frame. Most of the time, a new exchage ID will be used when a device goes and gets a different set of data...whether that is a block of data or recognizes it as a different file, whatever depending on the driver in the initiator. So, then we will spread these sessions across the portchannel. We don't do a per-packet LB like CEF can be configured to do on the IP side. If you want to compare it to IP, we LB each TCP session down a different physical path.

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