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  • one-way audio - routing issue

    Hi, folks, I'm experiencing one-way audio on (2) IP265s connected via VPNs (Adtran 2054s, not using ST VPN Concentrator). While running a telnet session to my SG switch I noticed the following events popping up, both of which reference the network address of my two VPN networks. I believe I have a routing issue but am not sure what's being reflected by these events.

    INFO: src=System, eventid=0xc100006c , str=(Route dest 192.168.0.10 gate 192.168.10.240 flags 17 Added 3+ min ago: Deleted)

    INFO: src=System, eventid=0xc100006c , str=(Route dest 192.168.20.20 gate 192.168.10.240 flags 17 Added 3+ min ago: Deleted)

    I also ran the routeShow command and the result is below:

    ROUTE NET TABLE
    destination gateway flags Refcnt Use Interface
    ----------------------------------------------------------------------------
    0.0.0.0 192.168.10.254 3 0 723268 fei0
    192.168.10.0 192.168.10.201 101 0 0 fei0
    ----------------------------------------------------------------------------

    ROUTE HOST TABLE
    destination gateway flags Refcnt Use Interface
    ----------------------------------------------------------------------------
    127.0.0.1 127.0.0.1 5 0 0 lo0
    192.168.0.10 192.168.10.240 17 1 1 fei0
    192.168.20.20 192.168.10.240 17 0 0 fei0
    -------------------------------------------------------------------------

    Any guidance would be greatly appreciated.

    Thanks

  • #2
    I see the default gateway is different than the hop to your main voice network (an ICMP redirect occured).

    What does the network look like?

    Comment


    • #3
      The SG switch is behind a layer 3 Dell switch which is configured wirh VLANs. The gateway on the SG is set to the VLAN gateway on the Dell switch (192.168.10.254). The Adtran VPN device has a private IP of 192.168.10.240. Also, we're using SIP trunks with an Ingate firewall and Ingate tech support says they aren't seeing any RTP traffic getting to the Ingate.

      Thanks!

      Comment


      • #4
        What subnet does the Ingate live on? What subnet does the Adtran at your HQ live on?

        What are the routes set to on all of your devices?

        Comment


        • #5
          My guess is this is a routing issue. We'll want to look at your routing policy. You also should disable ICMP redirects on your Dell switch & adtran.

          I can't remember if the Dell's support it (they are a lower end switch... enterprise grade switches do support it).

          Comment


          • #6
            Everything is on the 255.255.255.0 subnet. Below are the routes configured on the Dell switch.

            Network Address Subnet Mask Next Hop IP
            0.0.0.0 0.0.0.0 192.168.10.205
            192.168.120.0 255.255.255.0 192.168.10.0
            192.168.130.0 255.255.255.0 192.168.10.0
            192.168.0.0 255.255.255.0 192.168.10.240
            192.168.20.0 255.255.255.0 192.168.10.240

            And here's what's configured on the Adtran:

            Destination Mask Next Hop Dist Type
            0.0.0.0 0.0.0.0 63.144.33.225 1 Static
            63.144.33.224 255.255.255.224 0.0.0.0 0 Connected
            192.168.10.0 255.255.255.0 0.0.0.0 0 Connected

            Comment


            • #7
              Originally posted by lockga View Post
              Everything is on the 255.255.255.0 subnet. Below are the routes configured on the Dell switch.

              Network Address Subnet Mask Next Hop IP
              0.0.0.0 0.0.0.0 192.168.10.205
              192.168.120.0 255.255.255.0 192.168.10.0
              192.168.130.0 255.255.255.0 192.168.10.0
              192.168.0.0 255.255.255.0 192.168.10.240
              192.168.20.0 255.255.255.0 192.168.10.240

              And here's what's configured on the Adtran:

              Destination Mask Next Hop Dist Type
              0.0.0.0 0.0.0.0 63.144.33.225 1 Static
              63.144.33.224 255.255.255.224 0.0.0.0 0 Connected
              192.168.10.0 255.255.255.0 0.0.0.0 0 Connected

              Actually, you have multiple subnets. 255.255.255.0 (24 bit mask) just defines the size of each network.

              Your routing isn't configured properly.

              First of all: 192.168.120.0 255.255.255.0 192.168.10.0
              192.168.130.0 255.255.255.0 192.168.10.0

              Points to 0, that's not a correct hop. It should specify the appropriate gateway. I am not sure what 120/130 networks are for in your environment.

              Next, your Adtran needs to be aware of any networks it needs to reach. Since you aren't running any type of routing protocol (OSPF) on your network, you need to define this on every device that has a default next hop that is not another internal device.

              I am not sure how your ingate is setup but depending on the subnet it is on (if it is not voice), you'll need to update your routing policies.

              Did you have a partner help you implement this solution? Your network VAR should really be in here helping your understand your design and properly implementing routing in your environment.

              Comment


              • #8
                Chris, thanks for the input. I figured it was a routing issue but as you can tell my routing expertise is limited. Based on your analysis it sounds like my next step is to bring someone in with the expertise to sort things out and correct the routing issues. I appreciate you taking the time to provide feedback on this!

                Comment

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