2 Replies Latest reply on Dec 27, 2018 9:59 AM by jayh

    Point to Point configuration for Comcast Cable Help

    hanpaver New Member

      So here is my problem.  I can ping from my laptop (172.16.0.5) to all the router inter faces in Router 1 & 2 and to the Workstation on the other side (172.16.10.6).  I can ping from Workstation (172.16.10.6) to all router interfaces in Router 2 & 1.  But that is it, I cannot ping Laptop (172.16.0.5).  I am attaching both configs & a Network Diagram

        • Re: Point to Point configuration for Comcast Cable Help
          melgumby New Member

          I think that your problem is that you are using a supernet and thereby causing an overlap of networks . ie 255.255.254.0 if the network is 172.16.10.0 the host would be 10.1 thru 172.16.11.254.

           

          Mel

          • Re: Point to Point configuration for Comcast Cable Help
            jayh Hall_of_Fame

            You have some duplicate static routes that don't look right.

             

            On MAINP2PTMV remove:

            ip route 0.0.0.0 0.0.0.0 172.16.1.254

            ip route 172.16.10.0 255.255.254.0 172.16.10.1

             

            On TMVP2PMain remove:

            ip route 172.16.10.0 255.255.254.0 172.16.10.1

             

            What is the default gateway of your laptop?

             

            On the layer 3 switch do you have the following static route? If not, you should.

             

            ip route 172.16.10.0 255.255.254.0 172.16.0.23

             

            Your "Network" document shows a /23 mask of 255.255.254.0 for VLANs 1 and 2, subnets 172.16.0.x and 172.16.1.x. These should be /24 or 255.255.255.0. The configuration on eth 0/1 of MAINP2PTMV is correct so this may just be a documentation error, but all interfaces on all devices on these two VLANs and subnets should be /24.

             

            There is also something odd that you have multiple layer 2 VLANs 11, 15,19, 23, and 27 for the same layer 3 subnet 172.16.10.x/23 and multiple layer 2 VLANs 13, 17, 21, and 25 for the same layer 3 subnet 172.16.12.x/23. I'm not sure what you're trying to accomplish here.