Cisco GRS Configuration Manual page 39

Implementing Carrier Grade NAT on Cisco IOS XR Software
• Multiple non-overlapping address pools can be used in a specified outside VRF mapped to different
• Max Outside public pool per CGSE/CGN instance is 64 K or 65536 addresses. That is, if a /16 address
• 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
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 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 5 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
10.10.0.0/16
OL-32659-01
inside VRF.
pool is mapped, then we cannot map any other pool to that particular CGSE.
Cisco IOS XR Carrier Grade NAT Configuration Guide for the Cisco CRS Router, Release 5.2.x
Configuring an Inside and Outside Address Pool Map
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 CGN NAT44
application.
Configures an inside VRF named insidevrf1 and enters CGN inside
VRF configuration mode.
Configures an inside VRF to an outside VRF and address pool
mapping.
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