Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 31

Why do packet loops occur during the configuration of BIDIR-PIM?

Answer options

• A. The network does not support BIDIR-PIM.
• B. The network is partially upgraded to support BIDIR-PIM.
• C. The router has not been configured to advertise itself.
• D. No interface for carrying traffic for multicast groups has been configured.

Correct answer: B

Explanation

Packet loops often occur when the network is only partially upgraded to support BIDIR-PIM, which can lead to miscommunication between routers. The other options do not directly lead to packet loops; for instance, lack of support or interface configuration issues would not inherently cause the looping behavior seen with incomplete upgrades.