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    Configuring GTP Services on a Broadband Gateway

    To configure a MobileNext Broadband Gateway as a GGSN/P-GW and enable GTP services, at minimum, you must configure a loopback interface and IP address on which GTP packets are received. Configuring GTP services on the GGSN/P-GW at the data plane, control plane, or (Gn, Gp, S5, or S8) interface level is optional.

    The following configuration specifies a loopback address on which all GTP packets are received for the S5, S8, Gn, and Gp interfaces.

    Note: To configure a loopback address on which all GTP packets are received, all 3GPP interfaces (S5, S8, Gn, and Gp) must be in the same VRF.

    To configure GTP services on a broadband gateway configured as a GGSN/P-GW:

    1. Configure the maximum number of peer entries for which the gateway stores statistics after the peer is deleted.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set peer-history 1000

      Note: In this configuration example, ggsn-pgw specifies the gateway personality and MBG1 is the logical name of the gateway.

    2. Configure an IPv4 address on a loopback interface to specify the transport address on which GTP-C and GTP-U packets are received for the S5, S8, Gn, and Gp interfaces.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set interface lo0.0 v4-address 10.10.10.1
    3. For tunnel management, configure the maximum number of times that the gateway will attempt to send signaling-request messages to a peer (SGSN or S-GW).
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set n3-requests 6
    4. For tunnel management, configure the time that the gateway waits before resending a signaling-request message when a response to the request has not been received.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set t3-response 8
    5. For path management, configure the maximum number of times that the gateway will attempt to send echo-request messages to a peer (SGSN or S-GW).
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set echo-n3-requests 6
    6. For path management, configure the time that the gateway waits before resending an echo-request message when an echo response to the echo request is not received.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set echo-t3-response 4
    7. For path management, configure the number of seconds that the gateway waits before sending an echo-request message after an echo response is received from the peer.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set echo-interval 65
    8. Configure security trace options for the gateway:
      1. Specify a name for the file that receives the output of the tracing operation.
        [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp traceoptions]user@host# set file gtp_log
      2. Configure the maximum size for the trace file.
        [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp traceoptions]user@host# set size 50m
      3. Configure the level of tracing to match all levels, including error conditions, informational messages, notice messages, verbose messages, and warning messages.
        [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp traceoptions]user@host# set level all
      4. Configure the tracing operation to trace all operations.
        [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp traceoptions]user@host# set flag all

    Published: 2011-11-17