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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Server Redundancy
[email protected] ("Jason Robertson") writes: > If you go out and spend a few thousand you can also get Allied Telesyn > L2-L4 products that now support Load Balancing. Actually the rapier > 24i is about $2000 Canadian. (I'd have to check the VAR pricing) how much would i have to pay to not have that extra powered box between my data and my customers? oh, i forgot, it's zero, isn't it? re: > > Using outboard appliances for "server load balancing" is unnecessary, > > and it adds more powered boxes (thus decreasing theoretical reliability). > > > > If your upstream router can speak OSPF and is made by either Cisco or > > Juniper then it will implement ECMP (equal cost multipath). If you put > > your "service address" on lo0 as an alias, and you run Zebra or GateD > > on the "service hosts" which possess that alias address, then each such > > host will appear to be a router toward the service address as a "stub host" > > and your upstream routers will dtrt wrt flow hashing for udp or tcp traffic > > (that is, the udp/tcp port number will figure into the hash function, so > > you won't multipath your tcp sessions.) > > > > This is how f-root has worked for years. Look ma, no appliances. -- Paul Vixie
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