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Configuring Hardware Hashing for Multicast Traffic
By default, ingress multicast traffic on any port in the switch selects a particular port channel member to
egress the traffic. You can configure hardware hashing for multicast traffic to reduce potential bandwidth
issues and to provide effective load balancing of the ingress multicast traffic. Use the hardware multicast
hw-hash command to enable hardware hashing. To restore the default, use the no hardware multicast
hw-hash command.
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configure terminal
Step 1
Selects the port channel and enters the interface
configuration mode.
switch(config)# interface port-channel
channel-number
Step 2
Configures hardware hashing for the specified
port channel.
switch(config-if)# hardware multicast
hw-hash
Step 3
This example shows how to configure hardware hashing on a port channel:
switch# configure terminal
switch (config)# interface port-channel 21
switch(config-if)# hardware multicast hw-hash
This example shows how to remove hardware hashing from a port channel:
switch# configure terminal
switch (config)# interface port-channel 21
switch(config-if)# no hardware multicast hw-hash
Enabling LACP
LACP is disabled by default; you must enable LACP before you begin LACP configuration. You cannot
disable LACP while any LACP configuration is present.
LACP learns the capabilities of LAN port groups dynamically and informs the other LAN ports. Once LACP
identifies correctly matched Ethernet links, it facilitates grouping the links into an port channel. The port
channel is then added to the spanning tree as a single bridge port.
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configure terminal
Step 1
Enables LACP on the switch.switch(config)# feature lacp
Step 2
(Optional)
Displays enabled features.
switch(config)# show feature
Step 3
Cisco Nexus 5000 Series NX-OS Interfaces Configuration Guide, Release 5.2(1)N1(1)
78-26881-OL 57
Configuring Port Channels
Configuring Hardware Hashing for Multicast Traffic