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12 ServerIron ADX NAT64 Configuration Guide
53-1002288-02
Configuring NAT64 for IPv6-only client to IPv4 resource
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DRAFT: BROCADE CONFIDENTIAL
The <end-IPaddress> variable specifies the IPv4 address at the end of the NAT64 pool range. This
value should be the highest numbered IPv4 address in the range.
The prefix length option uses the CIDR prefix value specified by the <prefix-length> variable to
distinguish the portion of the IPv4 address that will be used for all IPv4 addresses in the pool. For
example, you can use “24” for the length of the CIDR prefix.
The port-pool-range option enables NAT64 redundancy. A value of 2 specifies a higher priority of
the NAT IP than a value of 1. A value of 2 also indicates that source ports allocated for the NAT IP
are from the higher range.
The inject-static-route option injects the <start-IPaddress> /<prefix-length> subnet route into
routing table which is then advertised to the adjacent router. This option is described in detail in
“Route injection NAT64” on page 13.
NOTE
If the ServerIron ADX runs out of Stateful NAT64 NAT pool ports or session entries, then a new
connection request should be dropped silently.
Enabling a ServerIron ADX to delete sticky sessions
You can configure a ServerIron ADX to delete a sticky session and select a new NAT64 pool IPv4
address if a pool in sticky session mode does not have available ports. This is configured as shown.
ServerIron ADX(config) nat64 nat-sticky-delete
Syntax: [no] nat64 nat-sticky-delete
If the NAT pool IP in a sticky session runs out of available ports, and a new IPv6 client connection
request arrives, then with this command the ServerIron ADX deletes the existing sticky session,
selects a new NAT pool IP and creates a new sticky session for this IPv6 client/NAT pool IP pair. Any
existing sessions from this IPv6 client will continue to exist, however all new connections will use
the new sticky session thus created."
Disabling sticky behavior
You can disable sticky behavior and select new NAT pool IP each time for an IPv6 client. This is
configured as shown.
ServerIron ADX(config) nat64 disable-sticky
Syntax: [no] nat64 disable-sticky
Enabling connection logging
You can enable connection logging to the syslog as shown.
ServerIron ADX(config) nat64 connection-log
Syntax: [no] nat64 connection-log