Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual download pdf (Page 18)

6 ServerIron ADX NAT64 Configuration Guide

53-1002444-02

NAT64 and NAT46 implementation details

DRAFT: BROCADE CONFIDENTIAL

NOTE

Because the ICMP checksum mechanism in IPv6 is different than the IPv4 checksum mechanism,

ICMP fragmentation is currently not supported, and all fragmented ICMP packets received on either

the IPv6 or IPv4 side are dropped. Counters keep track of the number of fragmented ICMP packets

dropped.

NOTE

When an IPv4 host sends multiple fragments with UDP checksum 0, the translation of those packets

from IPv4 to IPv6 is not supported.

Installing NAT64 on a previously configured ServerIron ADX

If a ServerIron ADX was previously configured for server load balancing (SLB), any server

configuration statements must be removed prior to creating any NAT64 configuration, and the

device must be rebooted.

This can be done by either of the following methods:

• Option 1: Use the no form of each complete server command to remove each configuration

statement or section in a granular fashion. Write the configuration to memory and then reload.

• Option 2: Completely erase the entire configuration with the erase startup-config command

and then reload without saving the configuration.

References

• RFC 6144: Framework for IPv4/IPv6 Translation

• RFC 6145: IP/ICMP Translation Algorithm

• RFC 6146: Stateful NAT64: Network Address and Protocol Translation from IPv6 Clients to IPv4

Servers

• RFC 6147: DNS64: DNS Extensions for Network Address Translation from IPv6 Clients to IPv4

Servers

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Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 18