Cisco Router % SEC-6-IPACCESSLOGP Meaning

Network Forensics

Answer Correct answer: C — Some packet-matching logs were missed because the access list log messages were rate limited, or no access list log buffers were available.

What does the part of the log, % SEC-6-IPACCESSLOGP, extracted from a Cisco router represent?

The system was not able to process the packet because there was not enough room for all of the desired IP header options
Immediate action required messages
Some packet-matching logs were missed because the access list log messages were rate limited, or no access list log buffers were available Correct Answer
A packet matching the log criteria for the given access list has been detected (TCP or UDP)

Community Insight

This question tests knowledge of Cisco security log severity levels, specifically distinguishing between a successful match (Level 6) and a logged overflow event.

The Cisco log message % SEC-6-IPACCESSLOGP indicates that packet-matching logs were missed due to rate limiting or buffer unavailability. This page explains the difference between standard access list logging and this specific overflow notification.

Learners often select Option D because they associate IP access logs with detecting packets, failing to recognize the 'P' suffix denotes a missing packet log due to rate limiting.

Community Discussion (3 comments)

aqeel1506 👍 1

Let's break down the options provided: Option A: This describes an issue related to the IP header options and is not related to access list logging. Option B: This generally refers to urgent system messages needing immediate attention, not specifically related to access list logging. Option C: This correctly describes the scenario where some access list log messages were missed due to rate limiting or buffer availability. Option D: This states that a packet matching criteria has been detected, which is true for access list logging, but it does not address the issue of missed logs. Therefore, based on the information provided, the correct answer is C: Some packet-matching logs were missed because the access list log messages were rate limited, or no access list log buffers were available.

aqeel1506 👍 1

The log message % SEC-6-IPACCESSLOGP extracted from a Cisco router typically represents option C: "Some packet-matching logs were missed because the access list log messages were rate limited, or no access list log buffers were available." This log message indicates that the router or firewall device has been configured to log access list matches (packets matching certain criteria defined in access lists), but some of these logs were missed due to rate limiting or because there were no available log buffers to store the logs.

Elb 👍 1

D. https://community.cisco.com/t5/other-network-architecture-subjects/ipaccesslogp-ipaccesslogdp-and-ipaccesslognp/td-p/87575

Comments & Corrections

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Expert Analysis

Why the Answer Is Correct

Option C is correct because the % SEC-6-IPACCESSLOGP message specifically indicates that an access list entry matched a packet, but the log for that packet was not generated because the system was rate-limited or buffers were full. The 'P' in the message ID stands for 'Packet' that was missed.

Why the Other Options Are Wrong

Option A describes IP header processing issues, unrelated to access lists. Option B refers to emergency messages (Level 0), whereas this is informational (Level 6). Option D describes a standard access list log match (%SEC-6-IPACCESSLOG), which does not include the 'P' suffix indicating a missed log.

Community Comment Notes

As Elb noted, community resources confirm that IPACCESSLOGP relates to missed logs. One commenter correctly identified that this message represents missed logs due to rate limiting, contrasting it with the standard match log.

Official Reference

https://www.cisco.com/c/en/us/support/docs/security/firepower-ngfw/213947-Cisco-Firepower-NGFW-System-Log-Messages.html

Exam Strategy

Always check the suffix of Cisco syslog IDs; a trailing letter often modifies the meaning from a standard event to an exception or overflow condition.

Frequently Asked Questions

Why is IPACCESSLOG different from IPACCESSLOGP?

IPACCESSLOG records a matched packet. IPACCESSLOGP records that a match occurred but the log entry itself was dropped due to rate limiting.

How do I fix rate-limited access list logs?

Increase the logging rate limit using the 'logging rate-limit' command or allocate more memory for logging buffers on the router.

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Related Analysis

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