312-49v11 practice question 5 of 25

Mia, a network administrator, is reviewing the logs of a Cisco router after noticing some performance degradation in her network. While examining the…

Mia, a network administrator, is reviewing the logs of a Cisco router after noticing some performance degradation in her network. While examining the logs, she encounters a particular message that states: “The system was not able to process the packet because there was not enough room for all of the desired IP header options.” Mia needs to identify which mnemonic in the Cisco IOS logs corresponds to this specific issue. Which of the following log mnemonics should Mia look for to find this message?

Answer options

A: %SEC-4-TOOMANY Correct answer

B: %IPV6-6-ACCESSLOGP

C: %SEC-6-IPACCESSLOGP

D: %SEC-6-IPACCESSLOGRL

Correct Answer:

A. %SEC-4-TOOMANY

Explanation

Cisco IOS message SEC-4-TOOMANY is generated when a packet’s IP header cannot accommodate all requested options; the router drops the packet and logs the cited text. The mnemonic for this alert in the log therefore is %SEC-4-TOOMANY.

Why Incorrect

%IPV6-6-ACCESSLOGP Logs IPv6 ACL permit events, unrelated to IP header option size. %SEC-6-IPACCESSLOGP IPv4 ACL permit logging; no relation to header-option length. %SEC-6-IPACCESSLOGRL Indicates ACL logging rate-limiting, not header option processing.

References

1. Cisco Systems. “Cisco IOS 12.4 System Message Guide – SEC Messages

” message SEC-4-TOOMANY

https://www.cisco.com/.../security/message/security.html#wp177848 (describes text and mnemonic).

2. Cisco Press. Clark & Hamilton

Cisco IOS in a Nutshell

2nd ed.

O’Reilly

2004

p. 241 (lists SEC-4-TOOMANY definition).

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