3com MSR 20-20 참조 매뉴얼

switch-delay: MDT switching delay in seconds, namely the delay time for multicast 
traffic to be switched from the share-MDT to the switch-MDT, in the range of 3 to 
60.

Use the multicast-domain switch-delay command to configure the MDT 
switching delay.

Use the undo multicast-domain switch-delay command to restore the 
system default.

By default, the MDT switching delay time is 5 seconds.

# Set the MDT switching delay to 20 seconds in VPN instance mvpn.

<Sysname> system-view

[Sysname] ip vpn-instance mvpn

[Sysname-vpn-instance-mvpn] multicast-domain switch-delay 20 

multicast-domain switch-group-pool switch-group-pool { mask | mask-length } 
[ threshold threshold-value | acl acl-number ] *

VPN instance view

switch-group-pool: The start address of the switch-group-pool, in the range of 
224.0.1.0 to 239.255.255.255.

mask: Mask for addresses in the switch-group-pool, in the range of 
255.255.255.0 to 255.255.255.255, meaning the switch-group-pool contains 1 
to 256 group addresses.

mask-length: Mask length for addresses in the switch-group-pool, in the range of 
24 to 32, meaning the switch-group-pool contains 1 to 256 group addresses.

threshold-value: Traffic rate threshold that will trigger MDT switching, in units of 
kbps. The effective range is 0 to 4194304.

acl-number: Advanced ACL number, in the range of 3000 to 3999. An advanced 
ACL is used to define the (S, G) entry or entries to which the configured MDT 
switching condition will apply. If you do not specify an ACL, the configured MDT 
switching condition will apply to all (S, G) entries.

Use the multicast-domain switch-group-pool command to configure the 
address range of the switch-group-pool and the switching condition.

Use the undo multicast-domain switch-group-pool command to restore the 
system default.