Hi,
If I want to load balance 2 or more STM1 links, what options are available? What are the trade-offs of these configurations.
I know that for NxT1, you could either use packet-by-packet based load sharing, and destination based load sharing. Are these also applicable to STM1 links?
How do I configure the router (I think it is a 7500 series) to do packet-by-packet load sharing and destination based load sharing.
Your time, effort and suggestions will be greatly appreciated Jaco Versfeld
packet by packet potentially uses bandwidth better, but may re-order packets (and some applications dont like this).
per destination (or any of the other hashing based schemes) force any 1 source / destination flow to go over a single link, so any 1 conversation is limited to the speed of a single link. Also if you only have a small number of conversations, then load balancing may be very uneven.
Note that you can do such things at layer2 using MLPPP, or at layer 3 if you use a routing protocol that can install multiple equal cost routes to the same destination, and set it up to do so.
might be - but packet by packet is likely to saturate the CPU before you load up the link.
i suggest you use CEF
Note that a VIP is not going to handle 2 STM-1s, so put the 2 interfaces in different VIPs
may make more sense to buy a more modern router that has hardware acceleration to get high thruput at a reasonable cost- personally i like the
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