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GeneUWG_150657's avatar
GeneUWG_150657
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Nov 29, 2016

Cabling 2 LTM's to one router

I am trying to design a setup like the one below and need some assistance on how to make the connections:

            +----------+
     +------+  Router  +-----+
     |      +----------+     |
     |                       |
     |                       |
     |                       |
     |                       |
+----------+           +-----------+
|   LTM01  +-----------+   LTM02   |
+----------+           +-----------+
     |                       |
     |                       |
     |                       |
     |                       |
     |                       |
     |    +--------------+   |
     +----+ Linux Server +---+
          +--------------+

My questions are:

  1. How do I setup the connection to the upstream router?
    1. Do I tell the router is an LACP LAG or just two independent connections?
    2. Do I do anything special on the LTM's?
  2. How do I setup the connection to the internal Linux server?
    1. Do I tell the server that its a LACP LAG? If not, how do I keep from getting a split route?
    2. Do I do anything special on the LTM's?

For what its worth, the Linux box has fail-open NIC's in it and will be connected to a pair of MLAG'ed switches farther down stream (LACP LAG on the Linux end).

  • You are not really achieving redundancy as there is a single point of failure at the router/server level. I would recommend using a pair of routers and/or a pair of switches instead of the server, if you can make it happen financially.