Verify the floating IP

Verify the floating IPΒΆ

This section describes how to verify the floating IP on an MX Series router and a virtual router.

The floating IP verification process is as follows:

  1. Verify a route propagation to the gateway.
  2. Ping next hop.
  3. Verify flow on the vRouter.
  4. Verify duplicated floating IPs.

To verify a route propagation on the vMX/vSRX routers:


Use the Junos CLI during the verification procedure.

  1. Log in to the vsrx1 router.

  2. Run the following command:

    root@vsrx1> run show route table public.inet.0

    Example of system response:

    public.inet.0: 8 destinations, 13 routes (8 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both          *[Static/5] 4w6d 22:49:22
                        > to via ge-0/0/0.0   *[Direct/0] 4w6d 22:49:22
                        > via ge-0/0/0.0   *[Local/0] 4w6d 22:49:22
                          Local via ge-0/0/0.0
    <floating_ip0>/32  *[BGP/170] 4w3d 00:41:07, MED 100, localpref 200, from
                          AS path: ?
                        > via gr-0/0/0.32769, Push 40
                        [BGP/170] 3w3d 00:30:48, MED 100, localpref 200, from
                          AS path: ?
                        > via gr-0/0/0.32769, Push 40
  3. In the output of the previous command, find the floating IP address that you want to debug.

  4. Run the following command to output details of the floating IP in question. For example:

    root@vsrx1> show route <floating_ip0>/32 detail
  5. Ping the floating IP in question using the following command:

    root@vsrx1> ping <floating_ip0> routing-instance public count 10

To check a route exchange on the Mirantis OpenContrail controller nodes:

  1. Validate the presence of the routing instance for each virtual network in the following sample system:

  2. Using the link from the previous step, find public network with floating IP pool.

  3. Using the same link, find and click the public:inet.0 table.

  4. On the opened page, find and click a floating IP that you want to check. For example:


For a detailed MX troubleshooting procedure, see: Troubleshoot the vMX router.

To verify forward and reverse flow on a vRouter

The OpenContrail vRouter is located on the compute cmp nodes. Use the following steps to troubleshoot the OpenContrail user issues related to service chaining, communication issues between virtual machines, between two virtual networks, and so on.

  1. Log in to any compute node of your MCP cluster. For example, cmp002.

  2. Run the following command:

    flow -l | grep '<floating_ip>\|'

    Example of system response:

     Index                Source:Port/Destination:Port                      Proto(V)
    492152<=>1500364      <floating_ip>:792                                   1 (5)
    (Gen: 1, K(nh):83, Action:F, Flags:, QOS:-1, S(nh):83,  Stats:487/519142,
    1500364<=>492152                                   1 (5)
    (Gen: 1, K(nh):83, Action:F, Flags:, QOS:-1, S(nh):35,  Stats:487/519142,

For a detailed forward and reverse flow troubleshooting procedure, see: Troubleshoot a VM forward and reverse flow.