Multiple 100mb pipes on 100mb switches

Discussion in 'Linux Networking' started by Dave, Jul 30, 2003.

  1. Dave

    Dave Guest

    I know, the subject is confusing so here's my situation:

    I have fiber coming into a Cisco 5500, then routed via a Linux router
    (iptables) and back into another blade on the 5500 where it then feeds
    out to many 2900 switches. We currently have just 100mb service
    feeding in through that fiber but will soon have a second 100mb of
    service from the same provider, giving us a 200mb pipe to them.

    Here's my problem - How can I balance it all when the blades in my
    5500 are only 100mb ports? I can't feed 200mb out of the 5500 into my
    linux box since the cards are all 100mb. My inital thoughts were to
    load balance 2 ports coming out of the 5500 shoot 2 lines back to the
    network. Then the reality of how much that would resemble bubble game
    and duct tape sets in.

    Does anyone have any suggestions, short of either:

    1 - purchasing a blade for the 5500 with gigabit, along with 2 gigabit
    cards for the router
    2 - setting up 2 routers, each handling 100mb of traffic and forcing
    certain machines on the network to feed through a specific one

    Option 1 can get a bit pricey, and option 2 gives me no load balancing
    (would hate to see one router near capacity while the other sits
    nearly unused). Any and all suggestions are appreciated.
    Dave, Jul 30, 2003
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  2. You could try a round robin load balancer in front of the two routers.
    This way you have higher availability and you balance the load.

    Kind regards,

    Anton Bossenbroek, Jul 31, 2003
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