F3215-HP Load Balancing Module Network Management Command Reference-6PW101

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Usage guidelines
You can configure multiple associations or use the undo command to remove an association from an
interface that serves as the egress of an internal network to the external network.
When the undo nat outbound command is executed to remove an association, the NAT entries
depending on the association are not deleted. They are aged out automatically after 5 to 10 minutes.
During this period, the involved users cannot access the external network whereas all the other users are
not affected.
When an ACL rule is not operative, no new NAT session entry depending on the rule can be created.
However, existing connections are still available for communication.
You can bind an ACL to only one address pool on an interface. An address pool can be bound to
multiple ACLs.
NAPT cannot translate connections from external hosts to internal hosts.
In stateful failover networking, make sure you associate each address pool configured on an interface
with one VRRP group only. Otherwise, the system associates the address pool with the VRRP group
having the highest group ID.
For some devices, the ACL rules referenced by the same interface cannot conflict. That is, the source IP
address, destination IP address, and VPN instance information in two ACL rules cannot be the same. For
basic ACLs (numbered from 2000 to 2999), if the source IP address and VPN instance information in
two ACL rules are the same, a conflict occurs.
Examples
# Configure NAT for hosts on subnet 10.110.10.0/24. The NAT address pool contains addresses
202.110.10.10 through 202.110.10.12. Assume that interface GigabitEthernet 0/1 is connected to the
Internet.
<Sysname> system-view
[Sysname] acl number 2001
[Sysname-acl-basic-2001] rule permit source 10.110.10.0 0.0.0.255
[Sysname-acl-basic-2001] rule deny
[Sysname-acl-basic-2001] quit
[Sysname] nat address-group 1 202.110.10.10 202.110.10.12
# Configure address pool 1.
[Sysname] nat address-group 1 202.110.10.10 202.110.10.12
# Use addresses in address pool 1 as translated addresses and TCP/UDP port information.
[Sysname] interface gigabitethernet 0/1
[Sysname-GigabitEthernet0/1] nat outbound 2001 address-group 1
# Use addresses in address pool 1 as translated addresses without using TCP/UDP port information.
<Sysname> system-view
[Sysname] interface gigabitethernet 0/1
[Sysname-GigabitEthernet0/1] nat outbound 2001 address-group 1 no-pat
# Use the IP address of interface GigabitEthernet 0/1 as translated address.
<Sysname> system-view
[Sysname] interface gigabitethernet 0/1
[Sysname-GigabitEthernet0/1] nat outbound 2001