IPv4 data center support for IPv4 and IPv6 visitors

摘要

A network element (NE) comprising a processor configured to transmit a message to a domain names system (DNS) server, wherein the message comprises a virtual service internet protocol (VSIP) version six (VSIPv6) address corresponding to a service associated with an internet protocol version four (IPv4) address. Also disclosed is a method comprising associating a remote host internet protocol (IP) version six (IPv6) address with a private IPv4 address in a stateful binding table, and associating a local service IPv4 address with a local service VSIPv6 address in a stateless binding table.

主权项

1. A network element (NE) comprising:
a transmitter and a receiver, wherein the transmitter and the receiver communicate with a first Internet protocol version six (IPv6) remote host, a domain names system (DNS) server via an IPv6 network, and an internet protocol version four (IPv4) service via an IPv4 network; a processor coupled to the transmitter and the receiver, wherein the processor:
transmits, via the transmitter, a message to the DNS server to support domain name resolution for the IPv4 service, wherein the message comprises a virtual service internet protocol (VSIP) version six (VSIPv6) address corresponding to the IPv4 service;receives, via the receiver, a first IPv6 packet from the first IPv6 remote host, wherein the first IPv6 packet comprises a source address set to an IPv6 address of the first IPv6 remote host;dynamically allocates an IPv4 address for the first IPv6 remote host from a private IPv4 address pool to facilitate communication between the first IPv6 remote host and the IPv4 service; andcreates a sessionless binding between the allocated IPv4 address and the IPv6 address of the first IPv6 remote host independent of any communication session between the first IPv6 remote host and the IPv4 service; and a memory coupled to the processor, wherein the memory comprises a binding table storing a sessionless binding entry comprising the allocated IPv4 address and the IPv6 address of the first IPv6 remote host, and wherein the NE is a dual stack load balancer operable in a datacenter aggregation network, the dual stack load balancer comprising the transmitter, processor, receiver, and memory.