Configuring An Ip Multicast Boundary - Cisco WS-CBS3032-DEL Software Configuration Manual

Chapter 45 Configuring IP Multicast Routing
Beginning in privileged EXEC mode, follow these steps to limit how long an sdr cache entry stays active
in the cache. This procedure is optional.
Command
Step 1 configure terminal
Step 2
ip sdr cache-timeout minutes
Step 3 end
Step 4 show running-config
Step 5 copy running-config startup-config
To return to the default setting, use the no ip sdr cache-timeout global configuration command. To
delete the entire cache, use the clear ip sdr privileged EXEC command.
To display the session directory cache, use the show ip sdr privileged EXEC command.

Configuring an IP Multicast Boundary

Administratively-scoped boundaries can be used to limit the forwarding of multicast traffic outside of a
domain or subdomain. This approach uses a special range of multicast addresses, called
administratively-scoped addresses, as the boundary mechanism. If you configure an
administratively-scoped boundary on a routed interface, multicast traffic whose multicast group
addresses fall in this range can not enter or exit this interface, thereby providing a firewall for multicast
traffic in this address range.
Note Multicast boundaries and TTL thresholds control the scoping of multicast domains; however, TTL
thresholds are not supported by the switch. You should use multicast boundaries instead of TTL
thresholds to limit the forwarding of multicast traffic outside of a domain or a subdomain.
Figure 45-7
address range 239.0.0.0/8 on all routed interfaces at the perimeter of its network. This boundary prevents
any multicast traffic in the range 239.0.0.0 through 239.255.255.255 from entering or leaving the
network. Similarly, the engineering and marketing departments have an administratively-scoped
boundary of 239.128.0.0/16 around the perimeter of their networks. This boundary prevents multicast
traffic in the range of 239.128.0.0 through 239.128.255.255 from entering or leaving their respective
networks.
OL-13270-06
Purpose
Enter global configuration mode.
Limit how long an sdr cache entry stays active in the cache.
By default, entries are never deleted from the cache.
For minutes, the range is 1 to 4294967295.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
shows that Company XYZ has an administratively-scoped boundary set for the multicast
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
Configuring Optional Multicast Routing Features
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