SatLink VSAT User Guide
Publication no. 101557
Copyright © 2009 – STM Group, Inc.
Page 74 (160)
15. Routing of Multicast Traffic
The STM SatLink VSAT can be configured to route multicast traffic from the LAN to the return channel
(to the Hub). User privilege level 2 is required for configuring the multicast routing.
To set up static routing of a multicast group from the LAN to the satellite interface, use the CLI command
ip addroute <IP group address> <subnet mask> <ifnum>. Where IP group address is
the IP multicast address that shall be routed from the Ethernet LAN to the Hub,
subnet mask is the net
mask for this routing entry, and
ifnum is the interface number (always set this to 3 = Satellite Interface).
Example:
# ip addroute 224.0.2.2 255.255.255.255 3
The command in the example will set up a route for the multicast group with the IP address 224.0.2.2 to
the satellite interface (to the Hub). The MAC address used on the return link will be calculated according
to RFC 1112.
To view the defined multicast routes use the CLI command
ip show -mcast.
Example:
# ip show -mcast
IP Multicast Routing Table
RouteAddress AddressMask IfIndex
224.0.0.2 255.255.255.255 1
224.0.2.2 255.255.255.255 3
Subnetwork internal multicast groups on the LAN will show up in the multicast route table
(e.g., LAN internal multicast traffic generated by Windows Network neighbourhood, etc.).
Such traffic will have the
IfIndex set to 1.
To delete multicast routes use the CLI command
ip delroute <IP group address> <subnet mask> <ifnum>
.
Example:
# ip delroute 224.0.2.2 255.255.255.255 3
Will delete the static route of the multicast group with the IP address 224.0.2.2 from the Ethernet LAN to
the satellite interface (Hub).
Enter the CLI command
save config to save the return link multicast configuration.
To Next Page
Loading...