IPSEC Multiple Modems on same Subnet

Discussion in 'Cisco' started by derSchweiz, Jan 28, 2007.

  1. derSchweiz

    derSchweiz Guest

    Hi,

    I want to setup multiple modems to aggregate bandwith between two sites
    using Cisco CEF Per-Packet and IPSEC crypto maps. I have 5 cable modems,
    which are connected to a switch, each of them on its own VLAN, and a 802.1q
    trunk that runs from the switch to Cisco router, to get virtual interfaces
    to access the modems. Same setup at both sites.

    What could I do if the ISP assigns IP addresses that are on the same subnet
    to each of these modems? i.e. 5 IP addresses are all in the 24.1.2.0/24
    subnet? If I try to assign these addresses to the interfaces of the router,
    it will show an error saying that addresses overlap. Is there a easy way
    around this problem? Maybe some sort of NAT to hide the external addresses?


    Any help appreciated.

    Thanks in Advance!
    derSchweiz, Jan 28, 2007
    #1
    1. Advertising

  2. derSchweiz

    derSchweiz Guest

    In other words would this work? Will there be any complications when setting
    up IPSEC tunnels using this configuration?

    24.1.2.1----<NAT>---10.0.0.0/30---[RouterA-Virtual Interface fa0/0.1]
    24.1.2.2----<NAT>---10.0.0.4/30---[RouterA-Virtual Interface fa0/0.2]
    24.1.2.3----<NAT>---10.0.0.8/30---[RouterA-Virtual Interface fa0/0.3]
    24.1.2.4----<NAT>---10.0.0.12/30---[RouterA-Virtual Interface fa0/0.4]
    24.1.2.5----<NAT>---10.0.0.16/30---[RouterA-Virtual Interface fa0/0.5]



    "derSchweiz" <> schrieb im Newsbeitrag
    news:JiWuh.814501$5R2.299282@pd7urf3no...
    > Hi,
    >
    > I want to setup multiple modems to aggregate bandwith between two sites
    > using Cisco CEF Per-Packet and IPSEC crypto maps. I have 5 cable modems,
    > which are connected to a switch, each of them on its own VLAN, and a
    > 802.1q trunk that runs from the switch to Cisco router, to get virtual
    > interfaces to access the modems. Same setup at both sites.
    >
    > What could I do if the ISP assigns IP addresses that are on the same
    > subnet to each of these modems? i.e. 5 IP addresses are all in the
    > 24.1.2.0/24 subnet? If I try to assign these addresses to the interfaces
    > of the router, it will show an error saying that addresses overlap. Is
    > there a easy way around this problem? Maybe some sort of NAT to hide the
    > external addresses?
    >
    >
    > Any help appreciated.
    >
    > Thanks in Advance!
    >
    derSchweiz, Jan 28, 2007
    #2
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. This Old Man
    Replies:
    4
    Views:
    668
    This Old Man
    Oct 20, 2003
  2. iwhite
    Replies:
    3
    Views:
    915
    Walter Roberson
    Nov 15, 2005
  3. Vass

    Subnet a subnet mask?

    Vass, Aug 26, 2005, in forum: Computer Support
    Replies:
    1
    Views:
    719
  4. Replies:
    16
    Views:
    4,732
  5. Replies:
    5
    Views:
    1,095
    Walter Roberson
    Jan 18, 2007
Loading...

Share This Page