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300-370 · Question #152

An engineer ran the debug packet logging enable all command, but only 25 packets are shown and none from the client the engineer wants to see. Which command helps find data that is specific to the…

The correct answer is B. debug packet logging acl lwapp-ip. To effectively filter debug packet logging for a specific client when general logging produces excessive output, an Access Control List (ACL) targeting the client's traffic is required.

WLAN Troubleshooting Methods

Question

An engineer ran the debug packet logging enable all command, but only 25 packets are shown and none from the client the engineer wants to see. Which command helps find data that is specific to the client?

Options

  • Adebug packet logging enable rx
  • Bdebug packet logging acl lwapp-ip
  • Cdebug packet logging enable format
  • Ddebug packet logging acl ip

How the community answered

(34 responses)
  • A
    6% (2)
  • B
    88% (30)
  • C
    3% (1)
  • D
    3% (1)

Why each option

To effectively filter debug packet logging for a specific client when general logging produces excessive output, an Access Control List (ACL) targeting the client's traffic is required.

Adebug packet logging enable rx

debug packet logging enable rx would only filter packets received, not by specific client identity, and would likely still exceed the 25-packet limit with general traffic.

Bdebug packet logging acl lwapp-ipCorrect

The debug packet logging acl lwapp-ip command allows the engineer to apply an Access Control List (ACL) specifically designed to filter traffic by the client's IP address, focusing the debug output on relevant packets encapsulated within the LWAPP or CAPWAP tunnel. This precisely targets the desired client's data, overcoming the default packet limit and noise.

Cdebug packet logging enable format

debug packet logging enable format relates to the output format of the debug logs, not to filtering which packets are captured.

Ddebug packet logging acl ip

debug packet logging acl ip is a generic IP ACL, whereas lwapp-ip implies a more specific context often used in wireless debugging for client traffic within the wireless tunnel.

Concept tested: Cisco wireless controller debug logging filtering

Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-10/cmd-ref/b_cg810/debug_commands.html

Topics

#WLC debug#packet capture#ACL filtering#troubleshooting tools

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