Command Reference Guide

3Com Router 5000 Family and Router 6000 Family spt-switch-threshold ● 135
Command Reference
spt-switch-threshold
Purpose Use the spt-switch-threshold command to set the packet rate threshold when
the PIM leaf router switches from the RPT to the SPT.
Use the undo spt-switch-threshold command to restore the default setting.
Syntax spt-switch-threshold { traffic-rate | infinity } [ group-policy
acl-number [ order order-value] ]
undo spt-switch-threshold { traffic-rate | infinity } [ group-policy
acl-number ]
Parameters traffic-rate
Switch rate threshold from the RPT to the SPT in Kbps.
Valid values are 0 to 65535.
If not specified, the default switch threshold value is 0
(that is, switching starts when the RPT receives the first
data packet).
infinity
Indicates never to switch to SPT.
acl-number
Number of basic IP ACL, defining the range of a
multicast group. Valid values are 2000 to 2999.
order-value
Order of the newly added or refreshed group-policy in
the group-policy table. Valid values are 1 to 99.
Example Set the threshold value to 4 kbps. If the transmission rate from the source to the
multicast group is higher than the value, the router will switch to the SPT toward the
source.
<3Com> system-view
[3Com] multicast routing-enable
[3Com] pim
[3Com-pim] spt-switch-threshold 4
Add a new group-policy, with ACL number of 2010, threshold value of 100, and
order number of 1.
[3Com] spt-switch-threshold 100 group-policy 2010 order 1
View This command can be used in the following views:
■ PIM view
Description Use the order command to regulate the order of the group-policy. In addition, the
system chooses SPT switch threshold according to the order of group-policy, which is
more flexible and increases efficiency.