300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and ServicesDemo

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QuestionQ163

Infrastructure Services

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Refer to the exhibit. Jitter on the link between R101 and R201 was tested for voice traffic over port 16384 without the control communication on port 1967. Which command enables R201 to receive RTT for the configured IP SLA?

  • A ip sla responder tcp-connect port 1967
  • B ip sla responder udp-echo ipaddress 2.2.2.2 port 16384
  • C ip sla responder udp-echo ipaddress 1.1.1.1 port 16384
  • D ip sla responder auto-register 1.1.1.1
Explanation

The IP SLA operation on R101 uses control disable, so it skips the default control-port handshake and sends UDP jitter probes directly to the destination IP and port configured in the operation — R201's own interface address, 2.2.2.2, on port 16384. For R201 to reply to these probes, its ip sla responder udp-echo command must listen on that same address and port that R101 is actually targeting.

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