350-801 · Question #435
An engineer configures Class-Based Weighted Fair Queuing, but must still configure Low Latency Queuing to prioritize voice audio traffic and guarantee 5 Mbps of bandwidth. Which Cisco IOS command…
The correct answer is C. priority 5000. To configure Low Latency Queuing (LLQ) and guarantee 5 Mbps bandwidth for voice traffic within a class map, the priority command followed by the bandwidth in kilobits per second must be used.
Question
An engineer configures Class-Based Weighted Fair Queuing, but must still configure Low Latency Queuing to prioritize voice audio traffic and guarantee 5 Mbps of bandwidth. Which Cisco IOS command must be run in the voice class map?
Options
- Apriority
- Bpriority 5
- Cpriority 5000
- Dpriority level 5
How the community answered
(32 responses)- A6% (2)
- B3% (1)
- C88% (28)
- D3% (1)
Why each option
To configure Low Latency Queuing (LLQ) and guarantee 5 Mbps bandwidth for voice traffic within a class map, the `priority` command followed by the bandwidth in kilobits per second must be used.
The `priority` command without a bandwidth value enables priority queuing but does not guarantee a specific bandwidth.
`priority 5` would reserve 5 kilobits per second, not 5 megabits per second.
The `priority` command in a class map reserves a strict amount of bandwidth for traffic matching that class, ensuring low latency. To guarantee 5 Mbps, which is 5000 kilobits per second, the command `priority 5000` is the correct syntax.
`priority level` is not the correct syntax for specifying bandwidth in LLQ configuration within a class map.
Concept tested: Cisco IOS LLQ bandwidth configuration
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_con_pshq/configuration/15-mt/qos-con-pshq-15-mt-book/qos-con-pshq-llq.html
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