300-710 · Question #208
An engineer is investigating connectivity problems on Cisco Firepower for a specific SGT. Which command allows the engineer to capture real packets that pass through the firewall using an SGT of 64?
The correct answer is A. capture CAP type inline-tag 64 match ip any any. To capture real packets associated with a specific Security Group Tag (SGT) on a Cisco Firepower device, the correct command syntax involves specifying "type inline-tag" followed by the SGT value. This command allows the engineer to filter and capture traffic directly related…
Question
An engineer is investigating connectivity problems on Cisco Firepower for a specific SGT. Which command allows the engineer to capture real packets that pass through the firewall using an SGT of 64?
Options
- Acapture CAP type inline-tag 64 match ip any any
- Bcapture CAP match 64 type inline-tag ip any any
- Ccapture CAP headers-only type inline-tag 64 match ip any any
- Dcapture CAP buffer 64 match ip any any
How the community answered
(22 responses)- A77% (17)
- B5% (1)
- C14% (3)
- D5% (1)
Why each option
To capture real packets associated with a specific Security Group Tag (SGT) on a Cisco Firepower device, the correct command syntax involves specifying "type inline-tag" followed by the SGT value. This command allows the engineer to filter and capture traffic directly related to SGT 64 for troubleshooting connectivity issues.
The command `capture CAP type inline-tag 64 match ip any any` correctly specifies an inline-tag capture, which is used to filter and capture packets based on their Security Group Tag (SGT). The `type inline-tag` keyword indicates that the following number, `64`, is the SGT to match, allowing the engineer to isolate and analyze traffic associated with that specific SGT.
The syntax `capture CAP match 64 type inline-tag ip any any` is incorrect because `type inline-tag` must precede the SGT value.
While `headers-only` is a valid option for packet capture, the primary issue is the SGT matching syntax, which is correctly formed in option A, and this option adds an unnecessary restriction.
The syntax `capture CAP buffer 64 match ip any any` is incorrect; `buffer` is a keyword to specify buffer size, not for matching an SGT, and it's misplaced in the command for SGT filtering.
Concept tested: Cisco Firepower packet capture with SGT filtering
Source: https://www.cisco.com/c/en/us/td/docs/security/firepower/70/cli/fxos-cli-guide-70/packet-capture.html#Cisco_Reference.dita_065e75ce-9391-4299-826f-99827018c1b6
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