发明名称 |
NETWORK ADDRESS TRANSLATION WITH GATEWAY LOAD DISTRIBUTION |
摘要 |
Gateway and NAT services to a single host or large number of hosts on a local network using a redundancy group having gateway devices. A pool of unique IP addresses are partitioned into address blocks, one of which is assigned to a gateway device. Using the unique IP addresses in its assigned address block, the gateway device translates local IP addresses of hosts on a local network to unique IP addresses from the gateway device's assigned address block for host packets destined for outside networks and creates a mapping of the translation. The gateway device notifies other gateway devices in the redundancy group of the mapping. A master mapping database or a local mapping database is updated whenever one of the gateway devices performs a translation. In the event that one of the gateway devices ceases forwarding of outgoing packets for a host using the gateway device's virtual MAC address, that virtual MAC address is re-assigned to an operating gateway device in the redundancy group to permit continued forwarding of the host's packets destined for outside networks. |
申请公布号 |
EP1609293(B1) |
申请公布日期 |
2016.07.06 |
申请号 |
EP20040758406 |
申请日期 |
2004.03.25 |
申请人 |
CISCO TECHNOLOGY, INC. |
发明人 |
SATAPATI, SURESH;WILSON, IAN, HERBERT;MCLAGGAN, DOUGLAS |
分类号 |
H04L29/12;H04L29/06;H04L29/08 |
主分类号 |
H04L29/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|