3com MSR 20-20 참조 매뉴얼

# Set the maximum number of downstream nodes for a single route in the 
multicast forwarding table of the public instance to 120.

<Sysname> system-view

[Sysname] multicast forwarding-table downstream-limit 120 

# Set the maximum number of downstream nodes for a single route in the 
multicast forwarding table of VPN instance mvpn to 60.

<Sysname> system-view

[Sysname] ip vpn-instance mvpn

[Sysname-vpn-instance-mvpn] multicast forwarding-table downstream-limit 60 

multicast forwarding-table route-limit limit

System view, VPN instance view

limit: Maximum number of route entries in the multicast forwarding table. The 
value ranges from 0 to 900.

Use the multicast forwarding-table route-limit command to configure the 
maximum number of route entries in the multicast forwarding table.

Use the undo multicast forwarding-table route-limit command to restore 
the system default.

By default, the maximum number of route entries in the multicast forwarding 
table is 900.

The system-allowed maximum number varies with different device models. Refer 
to your specific device model.

# Set the maximum number of routing entries in the multicast forwarding table of 
the public instance to 200.

<Sysname> system-view

[Sysname] multicast forwarding-table route-limit 200 

# Set the maximum number of routing entries in the multicast forwarding table of 
VPN instance mvpn to 200.

<Sysname> system-view

[Sysname] ip vpn-instance mvpn

[Sysname-vpn-instance-mvpn] multicast forwarding-table route-limit 200