Technical data

36 ServerIron ADX NAT64 Configuration Guide
53-1002288-02
Route injection NAT46
3
DRAFT: BROCADE CONFIDENTIAL
Figure 13 shows a typical IPv4-only client to IPv6 resource topology configured with router
adjacency relationships on both the IPv4 and IPv6 sides of the ServerIron ADX. In this
configuration, routes defined by the IP4 prefix and IPv6 prefix are advertised to the adjacent
routers and distributed to the respective networks using the routing protocol configured. To
accomplish this redistribution you must configure the routing protocol on your ServerIron ADX with
a redistribute static command.
FIGURE 13 NAT64 Route injection
.
For more details about how to configure routing protocols on a ServerIron ADX, see the following
chapters in the ServerIron ADX Switch and Router Guide:
• Configuring OSPF
• Configuring IPv6 Dynamic Routing
• Configuring IS-IS (IPv4)
• Configuring IPv6 IS-IS
• Configuring BGP4 (IPv4
• Configuring BGP4+
NAT46 Route injection example
The following example configures a ServerIron ADX with NAT46 for route injection into OSPF with
the following required details:
• an IPv6 address is configured: VLAN 1 is configured with VE 7 which has an IPv6 address
(2001:db8:8000::1)
• OSPF and OSPFv6 are configured for static route redistribution
• The IPv4 side is configured as OSPF Area 0 and the IPv6 side is configured as OSPF Area 1
• The nat64 ipv4-prefix command is configured with the inject-static-route option.
• The nat64 ipv6-prefix command is configured with the inject-static-route option which
specifies the ve 7 interface.
• The nat64 map command is configured to map IPv4 address 100.1.1.100 to IPv6 address
2001:db8:8000::100
In a NAT46 configuration, a route to the entire subnet defined by the nat64 ipv4-prefix is not
injected into the routing table. Only the IPv4 addresses for routes that are mapped are injected. In
this example, that means that only a route to 100.1.1.100 will be distributed into the IPv4 network.
In cases where the nat64 dns-dynamic-learning command is used, routes for all IPv4 addresses
that are learned are distributed.
ServerIron ADX
with NAT46
Router
IPv4-only Client
IPv4
NAT64 IPv6 Prex: 2001:db8::
NAT64 IPv4 Prex: 100.1.1./32
IPv6 address:
2001:11::
IPv6-only Server
IPv4 address:
192.0.2.1
Router