1 Reply Latest reply on May 23, 2012 7:41 AM by mcummisky

    I have multipe NICs on my server that each sit in a different subnet, routing issues

    mcummisky

      I have multipe NICs on my server that each sit in a different subnet.  Each of these subnets are in a vlan that has access to a range of loopbacks on the edge device.  I do this by using persistent routes on the NPM server.  I do not have default gateways on the NICS

       

      Example

       

      Nic 1 - 172.16.31.0 / 29

      nic 2 -  172.16.31.40 /29

      nic 3 - 172.16.31.240 /28

       

      Route example on server

       

      route add -p 1.0.0.0 mask 255.255.255.0 172.16.31.5  - this is nic 1

      route add -p 1.0.1.0 mask 255.255.255.0 172.16.31.46 - this is nic 2

      route add -p 1.0.2.0 mask 255.255.255.0 172.16.31.243 - this is nic 3

       

      The polling works perfectly fine, it sees my device and interfaces.  The problem is when i look at the logs and start seeing ACL denies on the router.

       

      Lets say i look at a cisco router that has the loopback 1.0.1.3 address.  NPM should use the NIC2 address to route to this device.  It does do that, but i also see port 137 come in sourced from all other NIC ip addresses.  Of course, my ACL's are knocking them down at the edge, but i believe this is causing unwanted traffic on the network.

       

       

      Does anybody have a fix for this?