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ME60 V800R010C10SPC500 Configuration Guide - LAN Access and MAN Access 01

This is ME60 V800R010C10SPC500 Configuration Guide - LAN Access and MAN Access
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Configuring MAC Flapping-based Loop Detection Association

Configuring MAC Flapping-based Loop Detection Association

To inform the network administrator of loops, enable MAC flapping-based loop detection association on the interface of the sub-interfaces bound with virtual switching instances (VSIs) or bridge domains (BDs). If a loop occurs in a VSI or a BD, the interface and all its sub-interfaces except for the EVC L2 sub-interfaces are blocked, and an alarm is generated.

Usage Scenario

MAC flapping-based loop detection can associate an interface with its sub-interfaces bound with virtual switching instances (VSIs) or bridge domains (BDs). If a loop occurs in the VSI or the BD bound to a sub-interface, the sub-interface is blocked. However, a loop may also exist in a VSI or a BD bound to another sub-interface. If the loop is not eliminated in time, it will cause traffic congestion or even a network breakdown. To inform the network administrator of loops, enable MAC flapping-based loop detection association on the interface of the sub-interfaces bound with VSIs or BDs. In this situation, if a sub-interface bound with a VSI or a BD is blocked due to a loop, its interface is also blocked and an alarm is generated. After that, all the other sub-interfaces bound with VSIs or BDs are blocked.

Pre-configuration Tasks

Before configuring MAC flapping-based loop detection association, configure MAC flapping-based loop detection for a VPLS network.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The Ethernet interface view is displayed.The virtual access interface view is displayed in a virtual access scenario.

  3. Run monitor mac-shift

    MAC flapping-based loop detection association is enabled on the interface.

    The monitor mac-shift command can be run on both Layer 2 and Layer 3 interfaces.

  4. Run commit

    The configuration is committed.

Checking the Configurations

After configuring MAC flapping-based loop detection association, check the configurations as follows:

Run the display loop-detect eth-loop [ vsi vsi-name | bridge-domain bd-id ] command to view the configuration information of MAC flapping-based loop detection in a VSI or a BD. Link-Block Port shows the associated interface.

<HUAWEI> display loop-detect eth-loop
VLAN/VSI/BD      LTimes    DCycle      Cycles   Retry     Action              
------------------------------------------------------------------------------
vsi1             3         3           1        0         Alarm-only          
vsi2             3         3           2        0         Block 0 s           
vsi3             10        10          3        2         Block 20 s          
                                                                                
Total Items = 3 
                                                                               
Blocked Port:
---------------
                                                                               
VLAN/VSI         Block Port            Link-Block Port       Detect MAC        T
--------------------------------------------------------------------------------
vsi2             GE1/0/1.1             GE1/0/1               0000-c101-0402    1
vsi3             Eth-Trunk9.1(P)                             0000-c106-0102    0
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Updated: 2019-01-04

Document ID: EDOC1100059440

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