350-401 · Question #1012
Refer to the exhibit. What is the effect of these commands on the BR and HQ tunnel interfaces?
The correct answer is C. The keepalives are sent every 5 seconds and 3 retries.. The keepalive 5 3 command configures the tunnel interface to send keepalive messages every 5 seconds and marks the interface down if 3 consecutive keepalives are missed.
Question
Exhibits
Options
- AThe keepalives are sent every 3 seconds and 5 retries.
- BThe tunnel line protocol goes down when the keepalive counter reaches 5.
- CThe keepalives are sent every 5 seconds and 3 retries.
- DThe tunnel line protocol goes down when the keepalive counter reaches 6.
How the community answered
(23 responses)- A4% (1)
- C91% (21)
- D4% (1)
Why each option
The `keepalive 5 3` command configures the tunnel interface to send keepalive messages every 5 seconds and marks the interface down if 3 consecutive keepalives are missed.
This option incorrectly reverses the interval and retries, stating 3 seconds and 5 retries.
This option incorrectly states that the tunnel line protocol goes down after 5 missed keepalives; it goes down after 3 missed keepalives.
The `keepalive <interval> <retries>` command specifies that keepalive messages are sent every `<interval>` seconds, and if `<retries>` consecutive keepalives are missed, the line protocol on the interface will go down. Therefore, `keepalive 5 3` means keepalives are sent every 5 seconds, and 3 retries are allowed before the interface is marked down.
This option incorrectly states that the tunnel line protocol goes down after 6 missed keepalives; it goes down after 3 missed keepalives.
Concept tested: Interface keepalive configuration
Source: https://www.cisco.com/c/en/us/td/docs/ios/dial/configuration/guide/d_dial_keepalive_ps1671_TSD_Products_Configuration_Guide_Chapter.html
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