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Configuring the Policy Functions for the Carrier Grade NAT
DETAILED STEPS
Command or Action
Step 1
configure
Example:
RP/0/RP0/CPU0:router# configure
Step 2
service cgn instance-name
Example:
RP/0/RP0/CPU0:router(config)# service
cgn cgn1
RP/0/RP0/CPU0:router(config-cgn)#
Step 3
service-type nat44 nat1
Example:
RP/0/RP0/CPU0:router(config-cgn)#
service-type nat44 nat1
Step 4
alg pptpAlg
Example:
RP/0/RP0/CPU0:router(config-cgn-nat44)#
alg pptpAlg
Step 5
end or commit
Example:
RP/0/RP0/CPU0:router(config-cgn)# end
or
RP/0/RP0/CPU0:router(config-cgn)# commit
Cisco IOS XR Carrier Grade NAT Configuration Guide for the Cisco CRS Router, Release 5.2.x
40
Implementing Carrier Grade NAT on Cisco IOS XR Software
Purpose
Enters global configuration mode.
Configures the instance named cgn1 for the CGN application and enters
CGN configuration mode.
Configures the service type keyword definition for NAT44 or DS-Lite
application.
Configures the pptp ALG on the CGN instance.
Saves configuration changes.
• When you issue the end command, the system prompts you to
commit changes:
Uncommitted changes found, commit them before exiting
(yes/no/cancel)?
[cancel]:
◦ Entering yes saves configuration changes to the running
configuration file, exits the configuration session, and returns
the router to EXEC mode.
◦ Entering no exits the configuration session and returns the
router to EXEC mode without committing the configuration
changes.
◦ Entering cancel leaves the router in the current configuration
session without exiting or committing the configuration
changes.
• Use the commit command to save the configuration changes to
the running configuration file and remain within the configuration
session.
OL-32659-01
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