Enabling Ip Multicast Routing; Configuring Multicast Static Routes - 3Com MSR 50 Series Configuration Manual

Enabling IP Multicast
Routing
c
n
Configuring Multicast
Static Routes
The minimum TTL value required for a multicast packet to be forwarded
■
The maximum number of downstream nodes for a single route in a multicast
■
forwarding table
The maximum number of routing entries in a multicast forwarding table
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Enabling IP multicast routing in the public instance
Follow these steps to enable IP multicast routing in the public instance:
To do...
Enter system view
Enable IP multicast routing
Enabling IP multicast routing in a VPN instance
Follow these steps to enable IP multicast routing in a VPN instance:
To do...
Enter system view
Create a VPN instance and
enter VPN instance view
Configure a route
distinguisher (RD) for the VPN
instance
Enable IP multicast routing
CAUTION: IP multicast does not support the use of secondary IP address
segments. Namely, multicast can be routed and forwarded only through primary IP
addresses, rather than secondary addresses, even if configured on interfaces.
For details about primary and secondary IP addresses, refer to
Configuration" on page
For details about the ip vpn-instance and route-distinguisher commands, refer
to "MPLS L3VPN Configuration" on page
Based on the application environment, a multicast static route has the following
two functions:
Changing an RPF route. If the multicast topology structure is the same as the
■
unicast topology in a network, the delivery path of multicast traffic is the same
as in unicast. By configuring a multicast static route, you can change the RPF
route so as to create a transmission path that is different from the unicast
traffic transmission path.
Creating an RPF route. When a unicast route is interrupted, multicast traffic
■
forwarding is stopped due to lack of an RPF route. By configuring a multicast
static route, you can create an RPF route so that a multicast routing entry is
created to guide multicast traffic forwarding.
Follow these steps to configure a multicast static route:
Configuring Multicast Routing and Forwarding
Use the command...
system-view
multicast routing-enable
Use the command...
system-view
ip vpn-instance
vpn-instance-name
route-distinguisher
route-distinguisher
multicast routing-enable
623.
1459.
1103
Remarks
-
Required
Disabled by default
Remarks
-
-
Required
No RD is configured by
default.
Required
Disabled by default
"IP Addressing