How to Configure ARP Detection: Huawei MA5600
How to Configure ARP Detection: Huawei MA5600T, MA5603T and MA5608T
The access device provides upstream ports through the upstream boards. ARP detection is not supported if the access device provides upstream ports through the control board.
A Timedelay protection group is configured on the upstream boards. For configuration details, see Configuring an Ethernet Port Protection Group.
Figure shows an Ethernet port protection example in which the access device (MA5600T/MA5603T/MA5608T) is dual-homed to BRASs.
The MA5600T/MA5603T/MA5608T is dual-homed to BRAS 1 and BRAS 2. The working links
are Link1 and Link2, and the protection link is Link3. If Link1 is faulty and Link2 is normal,
the MA5600T/MA5603T/MA5608T can switch services to Link3 by using ARP detection even
though the upstream port on the MA5600T/MA5603T/MA5608T is functioning properly. This
ensures uninterrupted service transmission.
Step 1 Configure VLAN and Layer 3 port IP address for ARP detection.
Run the vlan command to create a smart VLAN for ARP detection.
2. Add an upstream port to the VLAN.
Run the port vlan command to add the working upstream Ethernet port in the protection
group to the VLAN. The protection port in the protection group cannot be added to the
3. Create a Layer 3 interface for the VLAN.
Run the interface vlanif command to create a Layer 3 interface for the VLAN and enter
4. Configure an IP address for the Layer 3 interface in the VLAN.
Run the ip address command to configure an IP address for the Layer 3 interface in the VLAN. Ensure that this IP address is in the same subnet as the IP address of the remote device.
Step 2 Configure ARP detection for the working port in the protection group.
1. Configure ARP detection for the working port in the protection group.
Run the arp-detect command to configure ARP detection for the working port in the
2. (Optional) Configure the times for sending ARP detection packets.
Run the detect-multiplier command to configure the times for sending ARP packets. If
the remote device does not respond to the ARP detection packets sent by the local device (here, the access device) for the specified times, the local device considers ARP detection has timed out.
The waiting time for ARP detection is derived from the following formula: Waiting time = Interval for sending ARP request packets x Times for sending ARP packets. The ARP detection waiting time is also the time taken for triggering a protection switching. The minimum waiting time is 3s (1s x 3). Because the interconnected devices have to process
ARP packets, the device CPU load will increase. The more frequent the packets are sent, the heavier the CPU load.
3. (Optional) Configure the interval for sending ARP detection packets.
Run the min-tx-interval command to configure the interval for sending ARP detection
4. Enable the ARP detection function.
Run the detect enable command to enable the ARP detection function.
Step 3 Configure ARP detection for the protection port in the protection group.
Repeat Step 2(but change the working port to the protection port) to configure ARP detection for the protection port in the protection group.
Step 4 Verify ARP detection configurations at the two ports in the protection group.
Run the display arp-detect command to verify ARP detection configurations, such as the remote
IP address and enable/disable status of ARP detection, at the two ports in the protection group.