Example for Configuring Association Between an EFM Module and an Interface

Networking Requirements

As shown in Figure 1, EFM is configured between SwitchB and SwitchC. When GigabitEthernet0/0/2 on SwitchB becomes Down, EFM reports the fault to GigabitEthernet0/0/1 on SwitchB through association. Then GigabitEthernet0/0/1 becomes Down.

Figure 1 Association between EFM and an interface

Configuration Roadmap

The configuration roadmap is as follows:

Configure EFM between SwitchB and SwitchC.
Configure association between EFM and GigabitEthernet0/0/1 on SwitchB.

Procedure

Configure EFM between SwitchB and SwitchC.

# Configure SwitchB.

<HUAWEI> system-view
[HUAWEI] sysname SwitchB
[SwitchB] efm enable
[SwitchB] interface gigabitethernet 0/0/2
[SwitchB-GigabitEthernet0/0/2] efm mode passive
[SwitchB-GigabitEthernet0/0/2] efm enable
[SwitchB-GigabitEthernet0/0/2] quit

# Configure SwitchC.

<HUAWEI> system-view
[HUAWEI] sysname SwitchC
[SwitchC] efm enable
[SwitchC] interface gigabitethernet 0/0/2
[SwitchC-GigabitEthernet0/0/2] efm enable

Run the display efm session interface command on SwitchB to check the EFM OAM status. You can see that EFM OAM is in detect state.

[SwitchB] display efm session interface gigabitethernet 0/0/2
  Interface                 EFM State                   Loopback Timeout
  ----------------------------------------------------------------------
  GigabitEthernet0/0/2     detect                        --

Configure association between EFM and an interface.

# Configure GigabitEthernet0/0/1 on SwitchB and EFM between SwitchB and SwitchC to report faults to each other.

[SwitchB] oam-mgr
[SwitchB-oam-mgr] oam-bind efm interface gigabitethernet 0/0/2 trigger if-down interface gigabitethernet 0/0/1
[SwitchB-oam-mgr] quit

Verify the configuration.

Run the shutdown command on GE0/0/2 of SwitchB. EFM OAM reports the fault to GigabitEthernet0/0/1. Then GigabitEthernet0/0/1 enters the TRIGGER DOWN (3AH) state.

[SwitchB] interface gigabitethernet 0/0/2
[SwitchB-GigabitEthernet0/0/2] shutdown
[SwitchB-GigabitEthernet0/0/2] quit

[SwitchB] display interface gigabitethernet 0/0/1
GigabitEthernet0/0/1 current state : TRIGGER DOWN (3AH)                                       
Line protocol current state : DOWN                                              
...

The output of the display interface gigabitethernet 0/0/1 command displays information that you need to concern and "..." indicates that information is omitted.

Configuration Files

SwitchB configuration file

#
sysname SwitchB
#
efm enable
#
interface GigabitEthernet0/0/2
 efm mode passive
 efm enable
# 
oam-mgr
 oam-bind ingress efm interface GigabitEthernet0/0/2 trigger if-down egress interface GigabitEthernet0/0/1 
 oam-bind ingress interface GigabitEthernet0/0/1 egress efm interface GigabitEthernet0/0/2 trigger if-down   
#
return

SwitchC configuration file

#
sysname SwitchC
#
efm enable
#
interface GigabitEthernet0/0/2
 efm enable
#
return