Dell Force10 C150 Manual page 23

Deploying the Dell Force10 MXL into a Cisco Nexus Network Environment
N5K1 (conf)#interface Ethernet 1/1-2
N5K1 (conf-if-range)#switchport mode trunk
N5K1 (conf-if-range)#channel-group 20 mode active
N5K1 (conf-if-range)#exit
N5K1 (conf)#exit
N5K1#
This same command set is now run on N5K2 to configure its half of the multi-chassis LAG.
N5K2#configure
N5K2 (conf)#interface port-channel 20
N5K2 (conf-if-po-20)#switchport mode trunk
N5K2 (conf-if-po-20)#vpc 20
N5K2 (conf-if-po-20)#exit
N5K2 (conf)#interface Ethernet 1/1-2
N5K2 (conf-if-range)#switchport mode trunk
N5K2 (conf-if-range)#channel-group 20 mode active
N5K2 (conf-if-range)#exit
N5K2 (conf)#exit
N5K2#
In the example network the port-channels are configured to switchport trunk mode and left with the
default of allowing all available VLANs onto them.
Prepare the Nexus Per-VLAN Spanning Tree Instances
The Nexus' long method for deriving spanning-tree path cost is more compatible with the Force10
switch's spanning-tree implementation than the default short method. This setting is used in the
example network because it provides a cleaner end result that is easier to understand. However, since
in our example network the Force10 switches are only employed in an access switch role and do not
provide further connectivity to other switches, this setting does not affect the calculated spanning
trees' active paths.
Here are the commands for the N5K1 to enable the long pathcost method.
N5K1#configure
N5K1 (conf)#spanning-tree pathcost method long
N5K1 (conf)#exit
N5K1#
The same commands for the N5K2 switch follow.
N5K2#configure
N5K2 (conf)#spanning-tree pathcost method long
N5K2 (conf)#exit
N5K2#
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