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ServerIron ADX NAT64 Configuration Guide 9
53-1002444-02
Basic stateful NAT64 configuration
2
DRAFT: BROCADE CONFIDENTIAL
5. The NAT64 gateway also dynamically selects an IPv4 address (192.0.2.1) from the IPv4 NAT
address pool (192.0.2.1–192.0.2.10) and uses that address as the source address for the
packet that is sent to the IPv4 resource.
In a stateful configuration, the NAT64 gateway keeps track of all its connections.
6. When a return packet destined for the IPv6 client arrives at the NAT64 gateway, the NAT64
gateway translates that packet’s IPv4 destination address (192.0.2.1) to the client’s IPv6
address (2001:db8:ccc::1) and the IPv4 resource’s source address (100.1.1.1) to the
synthesized IPv6 address (2001:db8:80::100.1.1.1).
Figure 3 illustrates stateful NAT64 translation.
FIGURE 3 Stateful NAT64 translation
NOTE
If the ServerIron ADX receives an IPv6 packet that contains a protocol other than TCP, UDP, or
ICMPv6 in the last Next Header field of the IPv6 header, then the packet is discarded silently.
Basic stateful NAT64 configuration
The steps required for basic stateful NAT64 configuration include the following:
• “Configuring stateful IPv6 prefixes” on page 9
• “Configuring basic IPv4 NAT address pools” on page 10
Advanced configuration options are described later in the chapter.
NOTE
If you are configuring NAT64 on a system that has had a previous SLB configuration, refer to
“Installing NAT64 on a previously configured ServerIron ADX” on page 6.
Configuring stateful IPv6 prefixes
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 IPv4 address of an IPv4 resource.
Stateful NAT64 translation
IPv6 Client
IPv6 address = 2001:db8:ccc::1
IPv4 Server
IPv4 address = 100.1.1.1
NAT64 Gateway
Source IP =2001:db8:ccc::1
Dest. IP = 2001:db8:80::100.1.1.1
Source IP = 192.0.2.1
Dest. IP = 100.1.1.1
Source IP = 2001:db8:80::100.1.1.1
Dest. IP = 2001:db8:ccc::1
Source IP = 100.1.1.1
Dest. IP = 192.0.2.1
- 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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