3com MSR 20-20 참조 매뉴얼

Use the hello-option neighbor-tracking command to globally disable join 
suppression, namely enable neighbor tracking.

Use the undo hello-option neighbor-tracking command to enable join 
suppression.

By default, join suppression is enabled, namely neighbor tracking is disabled.

pim ipv6 hello-option neighbor-tracking.

# Disable join suppression globally.

<Sysname> system-view

[Sysname] pim ipv6

[Sysname-pim6] hello-option neighbor-tracking 

hello-option override-interval interval

IPv6 PIM view

interval: Prune override interval in milliseconds, with an effective range of 1 to 
65,535.

Use the hello-option override-interval command to configure the global 
value of the prune override interval.

Use the undo hello-option override-interval command to restore the default 
setting.

By default, the prune override interval is 2,500 milliseconds.

hello-option lan-delay (IPv6 PIM view), pim ipv6 hello-option lan-delay and 
pim ipv6 hello-option override-interval.

# Set the prune override interval to 2,000 milliseconds globally.

<Sysname> system-view

[Sysname] pim ipv6

[Sysname-pim6] hello-option override-interval 2000 

holdtime assert interval