On 7/10/2010 2:21 PM, Emmanuel Noobadmin wrote:
I've been reading that it's possible to set up a system with multiple NIC to provide redundant internet connectivity such that it will switch to a secondary connection if the primary ISP fails.
Is it possible in a similar way to setup redundant LAN routing? I read that it is possible to aggregate/bond multiple NIC to stackable switches that support link aggregation and redundancy. But if only simple switches are available, is something like this possible?
e.g. System A eth0 -> lan switch/router 1 eth1 -> lan switch/router 2
System B eth0 -> lan switch 1 eth1 -> lan switch 2
Then somehow specify that, if lan switch 1 fails, the two systems will switch to using switch 2 so that in case of a switch failure, the network continues to remain operational.
Yes. You can do it. I've done it before. All you need is the right choice of bonding mode . You set up bond0 for eth0 and eth1 and it 'just works'. To make it more robust, cross-connect the two switches as well.