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200-301 · Question #1173

SIP-based Call Admission Control must be configured in the Cisco WLC GUI. SIP call-snooping ports are configured. Which two actions must be completed next? (Choose two.)

The correct answer is C. Enable Media Session Snooping on the WLAN. D. Set the QoS level to platinum for voice traffic.. To complete SIP-based Call Admission Control (CAC) configuration on a Cisco WLC after setting SIP snooping ports, Media Session Snooping must be enabled on the WLAN, and the QoS level for voice traffic must be set to Platinum.

Submitted by chen.hong· Mar 5, 2026

Question

SIP-based Call Admission Control must be configured in the Cisco WLC GUI. SIP call-snooping ports are configured. Which two actions must be completed next? (Choose two.)

Options

  • ASet the QoS level to silver or greater for voice traffic.
  • BConfigure two different QoS roles for data and voice traffic.
  • CEnable Media Session Snooping on the WLAN.
  • DSet the QoS level to platinum for voice traffic.
  • EEnable traffic shaping for the LAN interface of the WLC.

How the community answered

(42 responses)
  • A
    7% (3)
  • B
    2% (1)
  • C
    76% (32)
  • E
    14% (6)

Why each option

To complete SIP-based Call Admission Control (CAC) configuration on a Cisco WLC after setting SIP snooping ports, Media Session Snooping must be enabled on the WLAN, and the QoS level for voice traffic must be set to Platinum.

ASet the QoS level to silver or greater for voice traffic.

While QoS is essential, 'silver or greater' is too vague; for real-time voice traffic, the highest priority QoS level, Platinum, is specifically recommended to meet strict latency and jitter requirements.

BConfigure two different QoS roles for data and voice traffic.

While configuring different QoS roles for data and voice traffic is a general QoS best practice, it's not the *next specific action* directly tied to enabling SIP-based CAC for voice *on the WLAN* as per Cisco WLC configuration.

CEnable Media Session Snooping on the WLAN.Correct

Media Session Snooping (also known as SIP Call Snooping) needs to be explicitly enabled on the WLAN itself, in addition to configuring the SIP ports, for the WLC to actively monitor and process SIP call signaling to manage CAC.

DSet the QoS level to platinum for voice traffic.Correct

For optimal voice quality and to ensure CAC properly prioritizes and manages voice calls, Cisco best practices and configuration guides typically specify setting the QoS profile for voice traffic to 'Platinum' on the WLAN.

EEnable traffic shaping for the LAN interface of the WLC.

Traffic shaping might be applied for bandwidth management in certain network scenarios, but it is not a direct or required step immediately following SIP call-snooping port configuration for enabling SIP-based Call Admission Control on the WLC.

Concept tested: Cisco WLC SIP-based Call Admission Control (CAC) configuration

Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-0/configuration/guide/b_cg80/b_cg80_chapter_010000.html#concept_AC4E8D4F0A4A4858B35A86E931980373

Topics

#Cisco WLC CAC#SIP CAC#WLAN QoS#Media Session Snooping

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