Which types of Cisco ASR 5000 services are needed for communication between a Serving Gateway and Packet Data Network Gateway?

Question

Options

• AEGTP and SGW
• BEGTP and GTPU
• CSGW and GTPU
• DGTPU and PGW

• A
  10% (6)
• B
  83% (48)
• C
  3% (2)
• D
  3% (2)

Explanation

Option B is correct because communication between an SGW and PGW on the Cisco ASR 5000 requires two distinct service types: EGTP (Evolved GTP) handles the GTP-C control plane signaling - session establishment, modification, and deletion - while GTPU handles the GTP-U user plane, tunneling actual subscriber data packets across the S5/S8 interface. Both services must be configured together to support full SGW-PGW communication.

Why the distractors fail:

• A (EGTP and SGW) and C (SGW and GTPU): SGW is a network node, not an ASR 5000 service type - you configure an SGW service on the box, but it isn't the service bridging SGW-to-PGW communication.
• D (GTPU and PGW): Same issue - PGW is a network node/role, not a service type used to facilitate inter-node transport.

Memory tip: Think "Control + Data = EGTP + GTPU" - EGTP owns the signaling handshake (C-plane), GTPU owns the data tunnel (U-plane). Whenever a question asks what links two EPC nodes on the ASR 5000, you need both planes covered, and the node names (SGW, PGW) are never the answer since they identify what is communicating, not how.

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