Enabling periodic gateway probe
You can configure the MFF device to detect gateways periodically for the change of MAC addresses. This feature is supported by MFF manual mode and MFF automatic mode.
The time interval for sending gateway probes is 30 seconds. To get a gateway's MAC address, MFF in automatic mode uses the IP and MAC addresses of the first DHCP snooping entry corresponding to the gateway as the sender IP and MAC addresses of an ARP request, and sends the ARP request to the gateway. (In manual mode, MFF uses the IP and MAC addresses of the ARP snooping entry corresponding to the gateway.) After that, MFF will always use this entry to detect the gateway's MAC address, unless the entry is removed. If the entry is removed, MFF will look for another entry; if no other entry is found for the gateway, information about the gateway is removed.
To enable periodic gateway probe:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter VLAN view. | vlan vlan-id | N/A |
3. Enable periodic gateway probe. | mac-forced-forwarding gateway probe | Disabled by default. |