Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
nat overlap-address map-index overlappool-startaddress temppool-startaddress pool-
length length [ inside-vpn-instance inside-vpn-instance-name ]
Twice NAT is configured.
The overlapping address pool and temporary address pool contain consecutive IP addresses. The
lengths of the two address pools are the same, and up to 255 IP addresses can be configured in
each of the two address pools.
Up to 8 mapping entries between the overlapping address pool and the temporary address pool
can be configured.
When the VPN instance in the NAT mapping is deleted, the twice NAT configuration is also
deleted.
----End
5.3.12 Checking the Configuration
After NAT is configured, you can view information about NAT.
Procedure
l Run the display nat alg command to check whether the NAT ALG function is enabled.
l Run the display nat address-group [ group-index ] [ verbose ] command to check the
configuration of the NAT address pool.
l Run the display nat dns-map [ domain-name ] command to check information about DNS
mapping.
l Run the display nat outbound [ acl acl-number | address-group group-index |
interface { Ethernet } interface-number.subnumber ] command to check information
about outbound NAT.
l Run the display nat overlap-address { map-index | all | inside-vpn-instance inside-vpn-
instance-name } command to check information about twice NAT.
l Run the display nat server [ global global-address | inside host-address [ vpn-instance
vpn-instance-name ] | interface interface-type interface-number.subnumber ] command to
check the configuration of the NAT server.
l Run the display nat static [ global global-address | inside host-address [ vpn-instance
vpn-instance-name ] | interface interface-type interface-name ] command to check the
configuration of static NAT.
l Run the display nat mapping table { all | number } command to view the NAT mapping
table information or number of entries in the table.
----End
Huawei AR150&200 Series Enterprise Routers
Configuration Guide - IP Service 5 NAT Configuration
Issue 02 (2012-03-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
116
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