Technical data

ServerIron ADX NAT64 Configuration Guide 31
53-1002444-02
Stateless NAT64 static mapping configuration
3
DRAFT: BROCADE CONFIDENTIAL
• Stateless NAT64 packet fragmentation configuration: This topic describes the options available
for handling packet fragmentation in a stateless NAT64 gateway.
Basic stateless NAT64 static mapping configuration
A basic NAT64 gateway configuration uses a statically defined mapping table to make IPv4
resources available to IPv6 clients. The mapping table defines a one-to-one relationship between
an IPv4 address and an IPv6 address. In a stateless NAT64 configuration that uses static mapping,
all entries in the mapping table are configured manually.
The basic tasks required to configure a ServerIron ADX for basic NAT64 translation using static
mapping of IPv6 and IPv4 addresses include the following:
• “Configuring stateless NAT64 IPv6 prefixes for static mappings” on page 31
• “Configuring stateless NAT64 static mappings” on page 31
Configuring stateless NAT64 IPv6 prefixes for static mappings
The NAT64 gateway uses a NAT64 IPv6 prefix to create a synthesized IPv6 address to represent
IPv4 resources to the IPv6 network.
Use the nat64 ipv6-prefix command to specify the IPv6 prefix. In a stateless NAT64 configuration,
you must include the stateless parameter. Enter a command such as the following:
ServerIron ADX(config)# nat64 ipv6-prefix 2001:db8:8000::0/96 stateless
Syntax: [no] nat64 ipv6-prefix <prefix/length> [inject-static-route] stateless
The <prefix/length> variable specifies the IPv6 prefix that will be used by the ServerIron ADX when
operating as a NAT64 gateway. Currently, the only supported prefix length is 96.
The stateless operand is required for stateless NAT64 gateway configurations. Only one IPv6 prefix
can be designated as stateless using this option.
In advanced static mapping configurations, the inject-static-route option can be used to advertise a
route to mapped IPv4 addresses to the IPv6 network. For more information, refer to “Configuring
static NAT64 IPv6 prefixes with route injection” on page 33.
Configuring stateless NAT64 static mappings
In static NAT64 configurations, use the nat64 map command to specify the IPv4 address of a
resource and map that IPv4 address to the IPv6 address of a client. Enter a command such as the
following:
ServerIron ADX(config)# nat64 map 201.1.1.100 2001:db8:8000::100
Syntax: [no] nat64 map <ipv4-address> <ipv6-address>
The <ipv4-address> variable specifies the IPv4 address for the IPv4-IPv6 mapping. The
<ipv6-address> variable specifies an IPv6 address for the IPv4-IPv6 mapping.
NOTE
A maximum of 1024 entries is supported in the mapping table. Entries can be defined manually
using the nat64 map command or dynamically using real-time or prefetched dynamic mappings. For
more information, refer to “Populating the NAT64 mapping table” on page 30.