Setting the hello interval
To check the connectivity of a tunnel, the LAC and LNS regularly send each other hello packets. On receipt of a hello packet, the LAC or LNS returns a response packet. If the LAC or LNS receives no hello response packet from the peer within a specific period of time, it retransmits the hello packet. If it receives no response packet from the peer after transmitting the hello packet three times, it considers the L2TP tunnel is down and tries to re-establish a tunnel with the peer.
To set the hello interval:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter L2TP group view. | l2tp-group group-number | N/A |
3. Set the hello interval. | tunnel timer hello hello-interval | Optional. 60 seconds by default. |