3Com CoreBuilder 2500 User Manual - page 149
Administering Multicast Tunnels
11-5
Administering
Multicast Tunnels
A multicast tunnel allows multicast packets to cross several unicast
routers to a destination router that supports multicast routing. A tunnel
has two end points. The local end point is associated with an interface on
the CoreBuilder 2500 router.
When you define the tunnel, specify the associated interface on the local
CoreBuilder 2500 router, specify the IP address of the remote multicast
router, and then specify the characteristics of the tunnel. Tunnel
characteristics are the same as those of an interface. Also specify the IP
address of the remote multicast router.
Not all multicast configurations require a tunnel. The only configurations
that require a tunnel are those that require a connection between two
multicast internetworks through one or more unicast routers.
Displaying Multicast
Tunnels
To display the IP multicast tunnels on the router, from the top level menu
of the Administration Console, enter:
ip multicast tunnel display
This example shows an IP multicast tunnel configuration:
Top-Level Menu
system
ethernet
fddi
atm
bridge
➧
ip
ipx
appletalk
snmp
analyzer
script
logout
interface
route
arp
atmArpServer
➧
multicast
udpHelper
routing
icmpRouterDiscovery
rip
ping
statistics
dvmrp
igmp
interface
➧
tunnel
routeDisplay
cacheDisplay
➧
display
define
remove
Index Local Address Remote Address Metric Threshold RateLimit State
1 158.101.112.204 137.39.229.98 2 255 500
pkts in:320069 pkts out:0
peers 137.39.229.98 (3.8) (0xe)