How to verify configurations on MLAG peer are consistent?
PICOS automatically checks the configuration consistency of the MLAG peer devices to ensure that the MLAG peer devices appear as one device to the downstream device and to make the MLAG function operate normally and smoothly.
After an MLAG related configuration is set, use the following command to show the result of MLAG configuration consistency check result.
run show mlag consistency-parameter { link <link-id>| summary}
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For example,
- Show the result of per MLAG configuration consistency check.
admin@Xorplus# run show mlag consistency-parameter link 3 Port Configurations: ----------------------------------------------------------------- Property                Local Value     Peer Value      Result ----------------------- --------------- --------------- ------ MTU                     1514            1514            PASS Mac Learning            Yes             Yes             PASS Lag Mode                LACP            LACP            PASS Native Vlan             3               3               PASS Port Vlan Mode          Access          Access          PASS  Spanning-Tree Configurations: ----------------------------------------------------------------- Property                Local Value     Peer Value      Result ----------------------- --------------- --------------- ------ Mode                    PVST            PVST            PASS BPDU Guard              No              No              PASS Root Guard              No              No              PASS Manual Forwarding       No              No              PASS Link Type               P2P             P2P             PASS Instance Count          1               1               PASS Instance Vlan 3                                                -- Port Priority        128             128             PASS -- Path Cost            0               0               PASS
- Show the result of global MLAG configuration consistency check.
admin@Xorplus# run show mlag consistency-parameter summary Overall : PASS -------------- Global : PASS Link 1 : PASS Link 2 : PASS Link 3 : PASS  MLAG Configurations: ----------------------------------------------------------------- Property                Local Value     Peer Value      Result ----------------------- --------------- --------------- ------ Domain ID               1               1               PASS Node ID                 1               0               PASS Peer VLAN               4088            4088            PASS Link Count              3               3              PASS Link IDs                1  2  3      1  2  3      PASS                     Spanning-Tree Configurations: ----------------------------------------------------------------- Property                Local Value     Peer Value      Result ----------------------- --------------- --------------- ------ Enable                  Yes             Yes             PASS Mode                    PVST            PVST            PASS Instance Count          65              65              PASS Instance Vlan 1                                                -- Bridge Priority      32768           32768           PASS -- Hello Time           2               2               PASS -- Forward Delay        15              15              PASS -- Max Age              20              20              PASS Instance Vlan 2                                                -- Bridge Priority      32768           32768           PASS -- Hello Time           2               2               PASS -- Forward Delay        15              15              PASS -- Max Age              20              20              PASS Instance Vlan 3                                                -- Bridge Priority      32768           32768           PASS -- Hello Time           2               2               PASS -- Forward Delay        15              15              PASS -- Max Age              20              20              PASS Instance Vlan 4                                                -- Bridge Priority      32768           32768           PASS -- Hello Time           2               2               PASS -- Forward Delay        15              15              PASS -- Max Age              20              20              PASS  DHCP Snooping Configurations: ----------------------------------------------------------------- Property           Local Value Peer Value      Result ----------------------- --------------- --------------- ------ Enable              No         No              PASS  IGMP Snooping Configurations: ----------------------------------------------------------------- Property                Local Value     Peer Value      Result ----------------------- --------------- --------------- ------ Enable                  No              No              PASS
In the displayed result, Result shows the consistency check results. The value could be PASS or FAIL:
- If Result is PASS, the configurations of the MLAG peer-link devices are consistent.
- If Result is FAIL, the configurations of the MLAG peer-link devices are inconsistent.
To ensure that the configuration parameters are consistent, we recommend that you run the MLAG consistency check command to display the configurations and the consistency check results for each MLAG peer device once you set a new MLAG related configuration.
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For more details about MLAG consistency check, please refer to MLAG Consistency Check.
NOTE:
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