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    Configuring GTP Services on the Data Plane

    On a Broadband Gateway, user data is transported through the GTP-U tunnel. To configure a separate address to receive GTP-U packets, you configure services on the router’s loopback interface.

    The following configuration specifies a separate address on which GTP-U packets are received for the S5, S8, Gn, and Gp interfaces, unless overridden at the 3GPP interface level.

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

    1. Configure an IPv4 address on a loopback interface to specify the transport address on which GTP-U packets are received.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp data]user@host# set interface lo0.0 v4-address 10.10.10.1
    2. 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 data]user@host# set n3-requests 6
    3. 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 data]user@host# set t3-response 8
    4. For path management, configure the maximum number of times that the gateway will attempt to send an echo-request message to a peer (SGSN or S-GW).
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp data]user@host# set echo-n3-requests 6
    5. 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 data]user@host# set echo-t3-response 4
    6. 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 data]user@host# set echo-interval 65
    7. Configure the number of seconds that the gateway waits before sending a TEID error message to the peer.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp data]user@host# set error-indication-interval 5

    Published: 2011-11-17