Cisco Systems N5KC5596TFA manual Load Balancing Using Port Channels

Configuring Port Channels

Load Balancing Using Port Channels

•Description

•CDP

•LACP port priority

•Debounce

After you enable forcing a port to be added to a channel group by entering the channel-group force command, the following two conditions occur:

•When an interface joins a port channel the following parameters are removed and they are operationally replaced with the values on the port channel; however, this change will not be reflected in the running-configuration for the interface:

•QoS

•Bandwidth

•Delay

•STP

•Service policy

•ACLs

•When an interface joins or leaves a port channel, the following parameters remain unaffected:

•Beacon

•Description

•CDP

•LACP port priority

•Debounce

•UDLD

•Shutdown

•SNMP traps

Load Balancing Using Port Channels

Cisco NX-OS load balances traffic across all operational interfaces in a port channel by reducing part of the binary pattern formed from the addresses in the frame to a numerical value that selects one of the links in the channel. Port channels provide load balancing by default.

The basic configuration uses the following criteria to select the link:

•For a Layer 2 frame, it uses the source and destination MAC addresses.

•For a Layer 3 frame, it uses the source and destination MAC addresses and the source and destination IP addresses.

	Cisco Nexus 5000 Series NX-OS Interfaces Configuration Guide, Release 5.2(1)N1(1)
48	78-26881-OL