Method of preserving symmetrical routing in a communication...

Details Method of preserving symmetrical routing in a communication... Method of preserving symmetrical routing in a communication...

2007-06-12

2007-06-12

Wiley, David (Department: 2143)

Electrical computers and digital processing systems: multicomput

Multiple network interconnecting

C709S240000, C370S401000

Reexamination Certificate

active

10317652

ABSTRACT:
A method of preserving symmetrical routing in a communication system comprising a server farm connected to the Internet by an Internet access router IAR. The server farm includes at least two customer cabinets each having a WEB server, and at least two firewalls. The firewalls use Virtual Router Redundancy Protocol (VRRP) to set up a primary firewall that supports communication between a customer server and an Internet user. The IAR selects the firewall to be used as being the firewall corresponding to the interface having the lowest weight in a routing table. The cost assigned to each interface associated with a firewall is automatically generated, at the initial time, according to the priority assigned by the VRRP protocol to said interface associated with said firewall.

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Berthaud, J. et al. “Method of Preserving Symmetrical Routing in a Communication System Based Upon a Server Farm”, IBM Patent Application, IBM Docket No. FR920010019US1, Filed concurrently with this application.

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