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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter34 Configuring IP Multicast Routi ng Configuring Optional Multicast Routing Features
Figure34-4 Administratively-Scoped Boundaries
You can define an administratively-scoped boundary on a routed interface for multicast group addresses.
A standard access list defines the range of addresses affected. When a boundary is defined, no multicast
data packets are allowed to flow across the boundary from either direction. The boundary allows the
same multicast group address to be reused in different admi nist rat ive domains.
The IANA has designated the multicast address range 239.0.0.0 to 239.255.255.255 as the
administratively-scoped addresses. This range of addresses can then be reused in domains ad ministered
by different organizations. The addresses would be considered local, not globally unique.
Beginning in privileged EXEC mode, follow these steps to set up an administratively-scoped boundary.
This procedure is optional.
45154
Company XYZ
Engineering Marketing
239.128.0.0/16
239.0.0.0/8
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 access-list access-list-number {deny |
permit} source [source-wildcard]Create a standard access list, repeating the command as many times as
necessary.
•For access-list-number, the range is 1 to 99.
•The deny keyword denies access if the conditions are matched. The
permit keyword permits access if the conditions are matched.
•For source, enter the number of the network or host from which the
packet is being sent.
•(Optional) For source-wildcard, enter the wildcard bits in dotted
decimal notation to be applied to the source. Place ones in the bit
positions that you want to ignore.
Recall that the access list is always terminated by an implicit deny
statement for everything.
Step3 interface interface-id Specify the interface to be configured, and enter interface configuration
mode.
Step4 no shutdown Enable the port, if necessary. By default, UNIs are disabled, and NNIs
are enabled.
Step5 ip multicast boundary
access-list-number Configure the boundary, specifying the access list you created in Step 2.
Step6 end Return to privileged EXEC mode.