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  • Only one interface on my 3620 Router?

    I bought a 3620 Router and now I am trying to configure it but donot understand how I can connect this router to two diffirent networks.

    It only have ONE Ethernet 0 port on back of Router. Well this will go to my first switch, but how can I connect the same router with other switch which has diffirent subnetwork?

    I did see one AUI port which has 9 pins on it, is this one can be used for second Ethernet connection?

    Anybody has any idea?

    Thanks,
    Data Sheet

  • #2
    Re: Only one interface on my 3620 Router?

    Hi data,
    what switch you got? well your problem got very easy solution. connect your switch with switch by using cross cable. then connect one of your switch with router. on router ethernet port divide it into two logical interface like this
    Router (config)# int e0
    # int e0.1
    # ip address < first network address connected to 1st switch> <subnet mask>
    #int e0.2
    #ip address < second network connected to 2nd switch addre> <subnet mask>

    on first network clients, assign default gateway address of int e0.1 and on 2nd network clients, assign default gateway address of int e0.2. easy problem solved.
    cheers

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    • #3
      Re: Only one interface on my 3620 Router?

      Really I can do this? huh...how many e0.x I can do this way?
      What this technique called?
      I have 2950 Catalyst switch and One 1900 Catalyst Switch.

      I have three computers, two are attached to 2950 and One is attached to 1900.

      is it really a "dot" after 0?

      Thanks,
      Data Sheet

      Comment


      • #4
        Re: Only one interface on my 3620 Router?

        AFAIK with most IOS revisions you cannot subinterface a Ethernet interface (just FastE or better).

        Yes it's a dot in there. The config example provided is missing the vlan number which you need to have in order for this to work.

        On the switch you'd do something like this:

        int fa0/1
        switchport mode trunk

        On the router it'd be

        int e0
        no shutdown

        int e0.2
        encapsulation dot1q 2
        ip addr 192.168.2.1 255.255.255.0

        int e0.3
        encapsulation dot1q 3
        ip addr 192.168.3.1 255.255.255.0

        You would then place hosts on vlans 2 and 3 with the appropriate IP info.
        Thanks,
        Brian Desmond
        Microsoft MVP - Directory Services
        www.briandesmond.com

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