Configuring Local MAC Swap Loopback
Context
Before performing a local MAC swap loopback test, configure the source MAC address, destination MAC address, and VLAN ID of test packets on the Switch. Only the packets with the specified source MAC address, destination MAC address, and VLAN ID are looped back.
When a local MAC swap test is performed on an interface, services on the interface are interrupted, but services on other interfaces are not affected. However, if a large number of test packets are sent, test packets occupy bandwidth of other services on the interface that sends test packets back to the tester.
Procedure
- Run system-view
The system view is displayed.
- Run interface interface-type interface-number
The interface view is displayed.
- Run loopback local swap-mac source-mac source-mac-address dest-mac dest-mac-address vlan vlan-id [ inner-vlan inner-vlan-id ] interface interface-type interface-number [ timeout { time-value | none } ]
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 the inner-vlan inner-vlan-id parameter.
QinQ and MAC swap loopback can be used simultaneously on a loopback interface of 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. If a loopback interface joins a VLAN in untagged mode, packets sent from the loopback interface do not carry tags. If a loopback interface joins a VLAN in tagged mode, packets sent from the loopback interface carry tags.