Cisco GRS User Manual

•
Multiple non-overlapping address pools can be used in a specified outside VRF mapped to different
inside VRF.
•
Max Outside public pool per CGSE/CGN instance is 64 K or 65536 addresses. That is, if a /16 address
pool is mapped, then we cannot map any other pool to that particular CGSE.
•
Multiple inside vrf cannot be mapped to same outside address pool.
•
While Mapping Outside Pool Minimum value for prefix is 16 and maximum value is 26.
SUMMARY STEPS
1.
configure
2.
service cgn instance-name
3.
service-type nat44 nat1
4.
inside-vrf vrf-name
5.
map [outside-vrf outside-vrf-name] address-pool address/prefix
6.
end or commit
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure
Example:
RP/0/RP0/CPU0:router# configure
Step 1
Configures the instance named cgn1 for the CGN application and
enters CGN configuration mode.
service cgn instance-name
Example:
RP/0/RP0/CPU0:router(config)# service cgn
cgn1
RP/0/RP0/CPU0:router(config-cgn)#
Step 2
Configures the service type keyword definition for CGN NAT44
application.
service-type nat44 nat1
Example:
RP/0/RP0/CPU0:router(config-cgn)#
service-type nat44 nat1
Step 3
Configures an inside VRF named insidevrf1 and enters CGN inside
VRF configuration mode.
inside-vrf vrf-name
Example:
RP/0/RP0/CPU0:router(config-cgn-nat44)#
inside-vrf insidevrf1
RP/0/RP0/CPU0:router(config-cgn-invrf)#
Step 4
Configures an inside VRF to an outside VRF and address pool
mapping.
map [outside-vrf outside-vrf-name] address-pool
address/prefix
Example:
RP/0/RP0/CPU0:router(config-cgn-invrf)# map
outside-vrf outside vrf1 address-pool
Step 5
10.10.0.0/16
Cisco IOS XR Carrier Grade NAT Configuration Guide for the Cisco CRS Router, Release 5.2.x
OL-32659-01 29
Implementing Carrier Grade NAT on Cisco IOS XR Software
Configuring an Inside and Outside Address Pool Map

Cisco GRS Specifications

General

Brand	Cisco
Model	GRS
Category	Network Router
Language	English