A network team is designing a PIM-SM domain with multiple candidate RPs. They need a mechanism that automatically distributes RP information to all routers and provides redundancy if the active RP fails. They prefer a standards-based approach that does not rely on a proprietary protocol. Which mechanism should they choose?

Configure static RP on every router.

Use Bootstrap Router (BSR) with candidate RPs.

A Cisco-only enterprise network is implementing PIM-SM. The team wants to use Auto-RP for RP discovery because they are familiar with it. However, they notice that Auto-RP uses multicast to distribute RP information, and PIM is not yet fully operational. What is a common prerequisite to ensure Auto-RP works?

Enable PIM-DM on all interfaces to flood Auto-RP messages.

Use BSR instead because Auto-RP is not reliable.

Disable IGMP snooping on all switches to allow Auto-RP multicast to reach all routers.

Configure a static RP for the Auto-RP groups (224.0.1.39 and 224.0.1.40) on all routers.

In a PIM-SM network, a receiver is receiving a video stream via the shared tree. The network administrator wants to reduce latency by switching to the shortest-path tree as soon as the first packet arrives. Which configuration achieves this?

Disable PIM-SM and use PIM-DM for this group.

Set the SPT threshold to 'infinity' to force immediate switchover.

Set the SPT threshold to 0 on the last-hop router.

Configure the RP to send a join toward the source on behalf of the receiver.

A network has two routers connected to the same Ethernet segment. Both routers are forwarding the same multicast group to that segment, causing duplicate traffic to hosts. What should you configure or rely on to ensure only one router forwards the multicast stream?

Enable PIM assert on the interface; the routers will elect a single forwarder.

Configure a lower RPF check on one router.

Use PIM-DM and rely on the flood-and-prune behavior to stop duplicates.

Increase the IGMP query interval on one router.

A switch receives a multicast frame destined to MAC address 01:00:5e:0a:01:02. The switch has IGMP snooping enabled. How does the switch forward this frame?

It floods the frame to all ports in the VLAN because the MAC address is unknown.

It forwards the frame only to ports that have joined the corresponding multicast group, based on the IGMP snooping table.

It drops the frame because multicast MAC addresses are not routable.

It forwards the frame only to the router port that connects to the multicast source.

CCIE Enterprise Infrastructure

Domain 1Objective 6

Multicast CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 8)

Part of the Network Infrastructure domain, which accounts for 30% of the CCIE-ENTERPRISE-INFRASTRUCTURE exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~15–24 in this domain), expect 3–4 from this objective — we provide 40 practice questions to prepare you well beyond it. (estimate)

40questions here

8free pages

12concepts

30%of the exam

Questions 36–40

36application · medium
A network team is designing a PIM-SM domain with multiple candidate RPs. They need a mechanism that automatically distributes RP information to all routers and provides redundancy if the active RP fails. They prefer a standards-based approach that does not rely on a proprietary protocol. Which mechanism should they choose?
Select an answer first
37application · medium
A Cisco-only enterprise network is implementing PIM-SM. The team wants to use Auto-RP for RP discovery because they are familiar with it. However, they notice that Auto-RP uses multicast to distribute RP information, and PIM is not yet fully operational. What is a common prerequisite to ensure Auto-RP works?
Select an answer first
38application · medium
In a PIM-SM network, a receiver is receiving a video stream via the shared tree. The network administrator wants to reduce latency by switching to the shortest-path tree as soon as the first packet arrives. Which configuration achieves this?
Select an answer first
39application · medium
A network has two routers connected to the same Ethernet segment. Both routers are forwarding the same multicast group to that segment, causing duplicate traffic to hosts. What should you configure or rely on to ensure only one router forwards the multicast stream?
Select an answer first
40application · medium
A switch receives a multicast frame destined to MAC address 01:00:5e:0a:01:02. The switch has IGMP snooping enabled. How does the switch forward this frame?
Select an answer first

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Multicast CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 8)

Questions 36–40

In a PIM-SM network, a receiver is receiving a video stream via the shared tree. The network administrator wants to reduce latency by switching to the shortest-path tree as soon as the first packet arrives. Which configuration achieves this?

A network has two routers connected to the same Ethernet segment. Both routers are forwarding the same multicast group to that segment, causing duplicate traffic to hosts. What should you configure or rely on to ensure only one router forwards the multicast stream?

A switch receives a multicast frame destined to MAC address 01:00:5e:0a:01:02. The switch has IGMP snooping enabled. How does the switch forward this frame?

Keep studying — Network Infrastructure