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Configuring NAT to Support Unicast Messaging
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Cisco cBR Series Converged Broadband Routers Application—Voice and Video Configuration Guide
24
Command or Action
ip nat outside
Example:
Router(config-if)# ip nat outside
interface bundle bundle-number
Example:
Router(config-if)# interface bundle
10
ip address ip-address mask secondary
Example:
Router(config-if)# ip address
192.168.18.1 255.255.255.0 secondary
ip nat inside
Example:
Router(config-if)# ip nat inside
exit
Example:
Router(config-if)# exit
ip nat inside source static
ip-multicast-address cable-ip-address
Example:
Router(config)# ip nat inside source
static 224.3.2.1 192.168.18.2
Repeat
Step 2, on page 23
and
page 24
for each cable interface to be
configured for DSG unicast traffic.
end
Example:
Router(config)# end
Advanced-Mode DOCSIS Set-Top Gateway 1.2 for the Cisco CMTS Routers
Purpose
Configures the WAN interface as the "outside"
(public) NAT interface.
Enters interface configuration mode for the
specified interface bundle.
This interface bundle should have
Note
previously been configured for DSG
operations.
Configures the cable interface with an IP address
and subnet that should match the unicast address
being used for DSG traffic. This IP address and its
subnet must not be used by any other cable
interfaces, cable modems, or any other types of
traffic in the cable network.
Configures the cable interface as the "inside"
(private) NAT interface.
Exits interface configuration mode and returns to
global configuration mode.
Maps the unicast IP address assigned to the cable
interface to the multicast address that should be
used for the DSG traffic.
Step 8, on
Exits global configuration mode and returns to
privileged EXEC mode.
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