Purpose
Command or Action
Exits interface configuration mode and returns to Privileged
EXEC mode.
end
Example:
Router(config-if)#
end
Step 7
Configuring a Standard IP Access List for Multicast Group Filtering
This section describes how to configure a standard IP access list so that non-DOCSIS devices, such as DSG
set-top boxes, can access only the authorized multicast group addresses and DSG tunnels.
This procedure assumes a basic knowledge of how access lists use an IP address and bitmask to determine
the range of IP addresses that are allowed access. For full details on configuring access lists, see the
documents listed in the
Additional References, on page 35
.
Tip
Procedure
Purpose
Command or Action
Enters global configuration mode.
configure terminal
Example:
Router#
configure terminal
Step 1
Creates an access list specifying that permits access
to the specific multicast address that matches the
specified
group-ip-address
and
mask
.
access-list access-list permit
group-ip-address
[
mask
]
Example:
Router(config)#
access-list 90 permit
228.1.1.1
Step 2
Configures the access list that denies access to any
multicast address that matches the specified
group-ip-address
and
mask
.
access-list access-list deny
group-ip-address
[
mask
]
Example:
Router(config)#
access-list 90 deny
224.0.0.0 15.255.255.255
Step 3
Configures the access list so that it denies access
to any IP addresses other than the ones previously
configured.
access-list access-list deny any
Example:
Router(config)#
access-list 90 deny
any
Step 4
Cisco cBR Series Converged Broadband Routers Application
—
Voice and Video Configuration Guide
27
Advanced-Mode DOCSIS Set-Top Gateway 1.2 for the Cisco CMTS Routers
Configuring a Standard IP Access List for Multicast Group Filtering
