splitting ATM PVC between different routers

Discussion in 'Cisco' started by Cleetus Awreetus, Apr 19, 2006.

  1. Bear with me and see if this makes sense. I have an ATM OC3 port adapter
    interface on a 6509. I have two PVCs off this OC3. It's Verizon ATM
    service. I provide connectivity to two separate locations through this
    interface. I'm trying to figure out if there's a way for me to somehow
    extend one of the PVCs to another router, a 7507 ( have ATM interfaces for
    it), in particular. I need to keep the one PVC homed off the 6509, but I
    need the other PVC somehow extended to the 7507 because it needs to be
    behind a different security enclave and subject to different security
    policy. I just don't have the ATM experience/knowledge to know exactly
    if/how this can be done. Any advice appreciated. Thanks.

    Cleetus Awreetus, Apr 19, 2006
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  2. Cleetus Awreetus

    Merv Guest

    You should be able to terminate the PVC on the 6509 using an
    sub-interfaces something like:
    int ATM x/0/0
    no ip address
    logging event subif-link-status

    interface ATM x/0/0.10 point-to-point
    description PVC #1
    bandwidth xxx
    ip address
    pvc PVC_1 1/10
    protocol ip x.x.x.x broadcast
    vbr-nrt 1536 1536 1
    encapsulation aal5snap

    interface ATM x/0/0.20 point-to-point
    description PVC #2
    ip address
    pvc PVC_2 1/20
    protocol ip y.y.y.y broadcast
    vbr-nrt 1536 1536 1
    encapsulation aal5snap

    You coul then route the other groups traffic thru the second PVC.

    If they want to secure the traffic they they could use GRE& IPSEC to
    tunnel their traffic
    Merv, Apr 20, 2006
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  3. These two PVCs are already in production and they're terminated with the
    sub-interfaces just like you've described. Take PVC #2 for example. I need
    to somehow extend that PVC so it terminates on another router.

    Cleetus Awreetus, Apr 20, 2006
  4. You need an ATM switch, like the LS1010 or 8510 inserted ahead of the
    6509. One with at least 3 OC3c ports. One for the inbound, two for
    the outbound.

    You map the one PVC to go out one interface, and the other to go out
    the other interface in the switch. No problem.

    Cost may be an issue that will make you rethink your desire to do this.
    You won't be able to do it with the gear you have now.
    Doug McIntyre, Apr 20, 2006
  5. Cleetus Awreetus

    Merv Guest

    Discuss your issue with your carrier to see what solutions they can

    Also discuss the approach of you just routing the traffic from 7507 (
    without using theri ATM interfaces) to the second PVC. As I indicated
    earlier they could create a secure tunnel and have it transported over
    your infrastructure.
    Merv, Apr 20, 2006
  6. Cleetus Awreetus

    awrightus Guest

    Ah, I have an old 5513 with a ls1010 with adequate atm interfaces
    that's not doing anything. I'll give that a try. Thanks.

    awrightus, Apr 20, 2006
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