300-320 · Question #30
Which option can be implemented to manipulate the election of PIM DR to force multicast traffic to a certain path?
The correct answer is C. Assign a higher PIM DR priority to the PIM DR interface. PIM DR (Designated Router) election on a multi-access segment is determined first by the highest DR priority, and then by the highest IP address if priorities are equal. The default priority is 1. To force a specific router to win the DR election and thus control which path…
Question
Which option can be implemented to manipulate the election of PIM DR to force multicast traffic to a certain path?
Options
- AAssign a lower PIM DR priority to the PIM DR interface.
- BAssign a lower IP address to the PIM DR interface.
- CAssign a higher PIM DR priority to the PIM DR interface.
- DIncrease the cost on the PIM DR interface.
How the community answered
(36 responses)- A8% (3)
- B3% (1)
- C81% (29)
- D8% (3)
Explanation
PIM DR (Designated Router) election on a multi-access segment is determined first by the highest DR priority, and then by the highest IP address if priorities are equal. The default priority is 1. To force a specific router to win the DR election and thus control which path multicast traffic takes, assign it a higher DR priority value. Assigning a lower priority (A) would make it less likely to win. Assigning a lower IP address (B) would also disadvantage a router (IP is used only as a tiebreaker). Increasing the interface cost (D) affects SPF/routing metrics, not PIM DR election.
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