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Example for Configuring Local MAC Swap Loopback
Networking Requirements
On SwitchB, GE1/0/1 connects to an Ethernet network and GE1/0/2 connects to users. A local MAC swap loopback test needs to be performed to test connectivity and performance of the Ethernet network. The local MAC swap loopback test checks performance of SwitchB.
Figure 8-3 Networking diagram of a local MAC swap loopback test
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Configuration Roadmap
The configuration roadmap is as follows:
- Create a VLAN and add GE1/0/1 and GE1/0/2 to the VLAN.
- Configure local MAC swap loopback on SwitchB.
- Enable the MAC swap loopback function on SwitchB to detect network connectivity and network quality.
Procedure
- Create VLAN 100 on SwitchB, configure GE1/0/1 as a trunk interface and GE1/0/2 as a hybrid interface, and add the interfaces to VLAN 100.
<Quidway> system-view [Quidway] sysname SwitchB [SwitchB] vlan batch 100 [SwitchB] interface gigabitethernet 1/0/1 [SwitchB-GigabitEthernet1/0/1] port link-type trunk [SwitchB-GigabitEthernet1/0/1] port trunk allow-pass vlan 100 [SwitchB-GigabitEthernet1/0/1] quit [SwitchB] interface gigabitethernet 1/0/2 [SwitchB-GigabitEthernet1/0/2] port hybrid pvid vlan 100 [SwitchB-GigabitEthernet1/0/2] port hybrid untagged vlan 100
- Configure local MAC swap loopback on GE1/0/2 of SwitchB and specify GE1/0/1 as the outbound interface of loopback Ethernet frames. Enable the MAC swap loopback function.
[SwitchB-GigabitEthernet1/0/2] loopback local swap-mac source-mac 0018-2000-0085 dest-mac 018-2000-0070 vlan 100 interface gigabitethernet 1/0/1 timeout 80 [SwitchB-GigabitEthernet1/0/2] loopback swap-mac start [SwitchB-GigabitEthernet1/0/2] quit
- Verify the configuration.
# After completing the configuration, run the display loopback swap-mac information command to verify the configuration. If the configuration is correct, send IP packets from the tester to analyze network performance.
[SwitchB] display loopback swap-mac information Loopback type : local Loopback state : running Loopback test time(s) : 80 Loopback interface : GigabitEthernet1/0/2 Loopback output interface : GigabitEthernet1/0/1 Loopback source MAC : 0018-2000-0085 Loopback destination MAC : 0018-2000-0070 Loopback vlan : 100 Loopback inner vlan : 0 Loopback packets : 0 Drop packets : 0
Configuration Files
SwitchB configuration file
# sysname SwitchB # vlan batch 100 # interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 100 # interface GigabitEthernet1/0/2 port hybrid pvid vlan 100 port hybrid untagged vlan 100 loopback local swap-mac source-mac 0018-2000-0085 dest-mac 0018-2000-0070 vlan 100 interface GigabitEthernet1/0/1 timeout 80 # return