1768 CHAPTER 104: L2TP CONFIGURATION COMMANDS
Use the undo tunnel timer hello command to restore the default.
By default, the interval is 60 seconds.
You can set different hello intervals for the LNS and LAC.
Example # Set the hello interval to 99 seconds.
<Sysname> system-view
[Sysname] l2tp-group 1
[Sysname-l2tp1] tunnel timer hello 99