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Forum Discussion

jake_macabuag_4's avatar
jake_macabuag_4
Icon for Nimbostratus rankNimbostratus
Mar 26, 2009

Link Controller: Automatic Bandwidth adjustment (CIR)

I have a question. Can LC do automatic bandwidth adjustment or adding of the total of 2 links if one link fails? I'll be setting up 2 Links, Link A and Link B with 2Mbps and 4Mbps respectively. When Link A fails, traffic will be routed to Link B but the available bandwidth of Link B will be increased automatically to 6Mbps to accomodate the total bandwidth link. Traffic should be inbound/outbound. Is LC capable in doing this alone without the use of iRules?

 

 

Thanks for your help.
config
design

3 Replies

  • dennypayne's avatar
    dennypayne
    Icon for Employee rankEmployee
    Mar 26, 2009
    Hi,

     

     

    I think you could effectively do this by setting up costing such that Link A shows "prepaid" up to 2Mbps, Link B is "prepaid" up to 4Mbps, and then has a really high cost from 4-6Mbps so that it never tries to use that unless it absolutely has to (ie, when Link A fails and it doesn't have a choice).

     

     

    Denny
  • jake_macabuag_4's avatar
    jake_macabuag_4
    Icon for Nimbostratus rankNimbostratus
    Mar 30, 2009
    what if it is the 4Mbps link that went down? the 2Mbps link should increase to 6Mbps as well to accomodate the other traffic
  • dennypayne's avatar
    dennypayne
    Icon for Employee rankEmployee
    Mar 30, 2009
    If the 4Mbps side goes down then it would have no choice but to use the 2Mbps link anyway, so the costing wouldn't matter. The costing is not a hard limit, it just tells LC to use the least expensive link in any given situation.

     

     

    Denny