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    Configuring GTP Services on the Control Plane

    To configure a separate address to receive GTP-C packets, you configure services on the router’s loopback address. The following configuration specifies an IPv4 transport address on which GTP control packets other than Create Session request are received for the S5, S8, Gn, and Gp interfaces.

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

    1. Configure an IPv4 address on a loopback interface to specify the address on which GTP-C packets are received.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp control]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 control]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 control]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 control]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 control]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 control]user@host# set echo-interval 65
    7. Specify a forwarding class for outbound control packets.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set forwarding-class assured-forwarding
    8. Specify a Differentiated Services Code Point (DSCP) value in the IP packet header for outbound control packets.
      [edit unified-edge mobile gateways ggsn-pgw MBG1 gtp]user@host# set dscp-code-point 010110

    Published: 2011-11-17