User's Manual

Configuring GRE, NAT, RIPSO, and BFE Services
2-60
308625-14.00 Rev 00
Using Site Manager
You must configure an IP interface on the router before enabling NAT
synchronization. If none are configured, you cannot enable synchronization. If an
IP interface already exists, you will be prompted to select that interface as the
synchronized router ID.
To enable NAT synchronization, complete the following tasks:
Setting the Synchronized Router ID
The synchronized router ID is used by NAT peer routers to detect valid or
duplicate TCP connections between peers. If a router receives a connection
request from a router not included in its list of synchronized peers, it rejects the
request and terminates the TCP connection. If an update is a duplicate, the router
ignores it.
This value can be any integer and must be unique for each router in a
synchronized configuration. Enter the value in the dotted-decimal format of an IP
address. A router IP address can be used as the ID. When you enable
synchronization, NAT software automatically uses the IP address of a configured
IP interface.
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose
Protocols
.
The Protocols menu opens.
2. Choose
IP
. The IP menu opens.
3. Choose
NAT
. The NAT menu opens.
4. Choose
Global
. The NAT Base Group Record window
opens.
5. Set the
Synchronization
parameter to
Enable
. Click on
Help
or see the
parameter description on page A-10.
6. Click on
OK
. If at least one IP interface is configured,
you are prompted to accept that interface
as the synchronized router ID.
7. Click on
Yes
. You return to the Configuration Manager
window.