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Static Cluster Link Aggregation

Jul 16, 2015

You must configure a static cluster LA channel on the cluster IP address and on the external connecting device. If possible, configure the upstream switch to distribute traffic based on IP address or port instead of MAC address.

To configure a static cluster LA channel by using the command line interface

  1. Log on to the cluster IP address.
    Note: Make sure that you configure the cluster LA channel on the cluster IP address before configuring link aggregation on the external switch. Otherwise, the switch will forward traffic to the cluster even though the cluster LA channel is not configured. This can lead to loss of traffic.
  2. Create a cluster LA channel.

    add channel <id> -speed <speed>

    Example 
    > add channel CLA/1 -speed 1000
    Note: You must not specify the speed as AUTO. Rather, you must explicitly specify the speed as 10, 100, 1000, or 10000. Only interfaces that have the speed matching the <speed> attribute in the cluster LA channel are added to the active distribution list.
  3. Bind the required interfaces to the cluster LA channel. Make sure that the interfaces are not used for the cluster backplane.

    bind channel <id> <ifnum>

    Example 
    > bind channel CLA/1 0/1/2 1/1/2 2/1/2
  4. Verify the configurations.

    show channel <id>

    Example 
    > show channel CLA/1
    Note: You can bind the cluster LA channel to a VLAN by using the bind vlan command. The interfaces of the channel are automatically bound to the VLAN.
  5. Configure static LA on the external switch. The following sample configurations are provided for the Cisco® Nexus 7000 C7010 Release 5.2(1). Similar configurations must be performed on other switches. 
    Global config: 
Configure terminal 
 
Interface level config: 
 
interface Ethernet2/47 
    switchport 
    switchport access vlan 10 
    channel-group 7 mode on 
    no shutdown 
 
interface Ethernet2/48 
    switchport 
    switchport access vlan 10 
    channel-group 7 mode on 
    no shutdown