Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 20
- Page / 149
- Table of contents
- BOOKMARKS
Rated. / 5. Based on customer reviews
8 ServerIron ADX NAT64 Configuration Guide
53-1002444-02
Stateful NAT64 overview
2
DRAFT: BROCADE CONFIDENTIAL
The DNS64 server provides the IPv6 client with a synthesized IPv6 address which enables the IPv6
client to reach the IPv4 resource. The synthesized IPv6 address consists of the 96-bit NAT64 IPv6
prefix concatenated to the IPv4 destination address of the IPv4 resource and represents that IPv4
resource to the IPv6 network.
The ServerIron ADX is configured as a stateful NAT64 gateway. The NAT64 gateway strips the IPv6
prefix from the synthesized destination address and forwards the packet to the resource using an
IPv4 address selected from its IPv4 NAT address pool as the source address. Because the state is
maintained, packets returned from the IPv4-only resource to the IPv6-only client are able to use the
same session to perform the required reverse translation.
Two key components must be configured on the NAT64 gateway in order to allow communication
between IPv6 clients and IPv4 resources: a NAT64 IPv6 prefix and an IPv4 NAT address pool.
• NAT64 IPv6 prefix: The DNS64 server concatenates the NAT64 IPv6 prefix to the IPv4 source
address to create the synthesized IPv6 destination address which represents the IPv4
resource to the IPv6 network.
• IPv4 NAT address pool: The NAT64 gateway selects an IPv4 address from the IPv4 NAT address
pool to use as the source address for packets it forwards to the IPv4 resource.
Operation of stateful NAT64
The following steps describe the operation of stateful NAT64 translation for the environment shown
in Figure 1.
1. The IPv6 client sends a query to the DNS64 server for the address of the resource
“www.brocadetest.com”.
2. As shown in Figure 2, the DNS64 server responds to the client’s query with a synthesized IPv6
address (2001:db8:80::100.1.1.1) that represents the IPv4 resource to the IPv6 network.
Notice that this synthesized IPv6 address is composed of a user-configured 96-bit IPv6 prefix
(2001:db8:80::) and the IP address of the IPv4-only server (100.1.1.1).
FIGURE 2 IPv6 client to DNS64 server communication
3. The IPv6 client sends a packet with the source address of the IPv6 client (2001:db8:ccc::1) to
the synthesized IPv6 destination address (2001:db8:80::100.1.1.1) that was obtained from
the DNS64 server.
4. The NAT64 gateway strips away the NAT64 IPv6 prefix from the synthesized IPv6 destination
address that was sent from the IPv6-only client and sets the remaining IPv4 address
(100.1.1.1) as the new destination address.
DNS64 Server
IPv6 Client
IPv6
www.brocadetest.com
2001:db8:80::100.1.1.1
- 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
Related products and manuals for Network switches Brocade Communications Systems ServerIron ADX 12.4.00
(16 pages)
(82 pages)© 2020, manymanuals.com. All rights reserved. | 0.725 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals