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12 ServerIron ADX NAT64 Configuration Guide
53-1002444-02
Advanced stateful NAT64 configuration
2
DRAFT: BROCADE CONFIDENTIAL
Figure 4 shows a typical IPv6-only client to IPv4 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 IPv6 prefix and IPv4 NAT address pool are advertised to the adjacent routers and
distributed to the respective networks using the routing protocol configured.
FIGURE 4 NAT64 route injection
.
NOTE
For details about how to configure routing protocols on a ServerIron ADX, refer to 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)”,
and “Configuring BGP4+”.
Configuring stateful IPv6 prefixes with route injection
In a stateful NAT64 configuration, the DNS64 server uses an IPv6 prefix to create a synthesized
IPv6 address which represents an IPv4 resource to the IPv6 network. This synthesized IPv6
address consists of two parts: an IPv6 prefix and the actual IPv4 address of an IPv4 resource.
Advanced NAT64 configurations can use static route injection to inject a route to IPv4 resources
that are mapped to the subnet defined by the IPv6 prefix into an IPv6 routing table, which is then
advertised to the adjacent IPv6 router.
To specify an IPv6 prefix and a route to the subnet defined by that prefix, enter a command such as
the following:
ServerIron ADX(config)# nat64 ipv6-prefix 2001:db8:8000::/96 inject-static-route
In the example, an IPv6 prefix (2001:db8:8000::) is defined that specifies the IPv6 subnet. The
inject-static-route option is used to specify the route to this subnet that will be injected into the
local routing table.
Syntax: [no] nat64 ipv6-prefix <prefix/length> [inject-static-route]
The <prefix/length> variable specifies the NAT64 IPv6 prefix that will be used by the ServerIron
ADX when operating as a NAT64 gateway. Currently, the only supported prefix length is 96.
NOTE
A maximum of eight NAT64 IPv6 prefixes can be configured.
IPv6 Router
IPv4
IPv4 Router
IPv6-only Client ServerIron ADX
with NAT64
NAT64 Prefix:
2001:db8: 8000::/96
NAT64 IPv4 address pool
192.0.2.1 - 192.0.2.10
IPv4-only Server
- ServerIron ADX 1
- Document History 2
- Contents 3
- About This Document 9
- Command syntax conventions 10
- Notice to the reader 11
- Related publications 11
- Getting technical help 11
- NAT64 and NAT46 Overview 13
- Stateless NAT46 translation 14
- Protocol support 15
- NAT64 fragmentation support 17
- References 18
- Stateful NAT64 Configuration 19
- Operation of stateful NAT64 20
- 53-1002444-02 23
- Enabling connection logging 28
- Displaying NAT64 information 31
- Displaying NAT64 translations 32
- Displaying NAT64 statistics 33
- Displaying NAT64 resources 37
- Stateless NAT64 Configuration 39
- Operation of stateless NAT64 40
- High availability for NAT64 52
- Clearing NAT64 information 53
- Stateless NAT46 Configuration 55
- Operation of stateless NAT46 56
- High availability for NAT46 67
- Displaying NAT46 information 68
- Clearing NAT46 information 69
- Access Control Lists 71
- Rule-based ACLs 72
- Default ACL action 74
- ACL IDs and entries 74
- Configuring rule-based ACLs 77
- Modifying rule-based ACLs 85
- Reordering ACLs 86
- Applying ACLs to interfaces 87
- Adding comments to named ACLs 89
- ACL logging 94
- Displaying ACL log entries 95
- Clearing the ACL statistics 97
- Throttling the fragment rate 98
- DRAFT: BROCADE CONFIDENTIAL 100
- Enabling strict TCP mode 101
- Enabling strict UDP mode 102
- ACLs and ICMP 103
- Numbered ACLs 104
- Named ACLs 105
- • Enable the strict TCP mode 107
- IPv6 Access Control Lists 109
- Configuration notes 110
- Processing of IPv6 ACLs 110
- Configuring IPv6 ACLs 111
- IPv6 ACL syntax 114
- Syntax Description 116
- Displaying IPv6 ACLs 118
- Logging IPv6 ACLs 119
- Network Address Translation 121
- Configuring NAT 122
- Configuring static NAT 123
- Configuring dynamic NAT 123
- Enabling IP NAT 124
- NAT configuration examples 125
- IP NAT with VIP overlap 129
- Translation timeouts 130
- Stateless static IP NAT 132
- IP NAT redundancy 133
- Displaying NAT information 144
- Displaying NAT translation 147
- Displaying VRRPE information 148
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