Nebie Cisco 3845 Router Question

Discussion in 'Cisco' started by chazman, Feb 2, 2011.

  1. chazman

    chazman

    Joined:
    Feb 2, 2011
    Messages:
    2
    I have a PC on my internal network (172.16.92.229) identified with a virus. I want to kick it off the network and wait for the helpdesk line to call with connectivity problem. Sounds simple: nope. :trytofly:

    I attempted to set a route for this offending PC (not a company PC, just someone plugged into an RJ45 outlet) and get "inconistent address and mask."

    Here is my existing route (minus my public IP):
    ip local pool dialup 172.16.92.43 172.16.92.47
    ip route 0.0.0.0 0.0.0.0 172.16.92.8
    ip route 10.0.0.0 255.255.255.0 172.16.92.8
    ip route 10.0.2.0 255.255.255.0 172.16.92.8
    ip route 10.1.1.125 255.255.255.255 172.16.92.8
    ip route 10.10.10.0 255.255.255.0 172.16.92.8
    ip route 10.99.2.0 255.255.255.0 172.16.92.8
    ip route 172.17.17.0 255.255.255.0 172.16.92.8
    ip route 172.31.0.0 255.255.255.0 172.16.92.8
    ip route 192.168.92.0 255.255.255.0 172.16.92.8
    ip route 192.168.100.0 255.255.255.0 172.16.92.8

    interface GigabitEthernet0/0
    description Connection to LAN
    ip address 172.16.92.1 255.255.252.0
    duplex auto
    speed auto
    media-type rj45
    negotiation auto
    no keepalive
    no mop enabled

    Is there a better way to kick this PC off my network, if not any ideas on why/how I can resolve the "inconsistent" error would be GREATLY appreciated.

    Thanks ya'll!

    Chazman - newbie
    chazman, Feb 2, 2011
    #1
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  2. chazman

    mbilgrav

    Joined:
    Feb 4, 2011
    Messages:
    3
    you can do a null0 router - i.e route to the "bit bucket"
    ex:
    ip route 169.254.0.0 255.255.0.0 Null0

    But this doesnt really help you much - you want to shutdown the switchport he is in.
    mbilgrav, Feb 4, 2011
    #2
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  3. chazman

    mbilgrav

    Joined:
    Feb 4, 2011
    Messages:
    3
    ups - i forgot to answer your question:

    "inconistent address and mask."
    means that you typed in something like:
    ip route 172.16.92.229 255.255.255.0 172.16.92.8
    This !"network" doesnt match the mask, as this is a host route, the mask are /32 ie 255.255.255.255
    Try this:
    ip route 172.16.92.229 255.255.255.255 Null0
    as per my previouly post

    (btw do you realize all your route statements macth the default route)
    mbilgrav, Feb 4, 2011
    #3
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