unknown-unicast load-balance
Function
The unknown-unicast load-balance command configures a load balancing mode for broadcast, unknown-unicast, and multicast (BUM) traffic.
The undo unknown-unicast load-balance command restores the default load balancing mode for BUM traffic.
By default, BUM traffic is load balanced based on source and destination MAC addresses of packets.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.
Format
unknown-unicast load-balance { dmac | smac | smacxordmac | enhanced [ lbid ] }
undo unknown-unicast load-balance
Parameters
Parameter |
Description |
Value |
|---|---|---|
dmac |
Load balances the BUM traffic based on destination MAC addresses of packets. |
- |
smac |
Load balances BUM traffic based on source MAC addresses of packets. |
- |
smacxordmac |
Load balances BUM traffic based on source and destination MAC addresses of packets. |
- |
enhanced [ lbid ] |
Load balances BUM traffic based on the enhanced load balancing profile. NOTE:
Only the S5720-EI, S6720-EI, and S6720S-EI support the lbid parameter. |
- |
Usage Guidelines
If the traffic policy contains a traffic behavior that defines the action of re-marking destination MAC addresses of packets, load balancing of BUM traffic must be based on source MAC addresses of packets.
On a VPLS network, when the S5720-EI, S6720-EI, or S6720S-EI switches form a stack, if the outbound interface of BUM traffic is an inter-device Eth-Trunk interface and the enhanced hash mode is used for BUM traffic, you are advised to configure run the unknown-unicast load-balance enhanced lbid to configure the load balancing mode. Otherwise, packet loss may occur or there may be duplicate packets.