350-401 · Question #256
Refer to the exhibit. Which two effects of this configuration are true? (Choose two)
The correct answer is B. It sets the TTL for discovery messages to 60 hops. E. It configure the router as the rendezvous point.. This configuration snippet (e.g., ip pim send-rp-announce Loopback0 scope 60) sets the TTL for RP announcement messages to 60 hops and explicitly configures the router to act as a Rendezvous Point.
Question
Exhibits
Options
- AIt creates an administratively scoped boundary for ACL 60.
- BIt sets the TTL for discovery messages to 60 hops.
- CIt prevent the device from falling back to dense mode.
- DIt sets announcement interval to 60 seconds.
- EIt configure the router as the rendezvous point.
How the community answered
(50 responses)- A14% (7)
- B78% (39)
- C2% (1)
- D6% (3)
Why each option
This configuration snippet (e.g., `ip pim send-rp-announce Loopback0 scope 60`) sets the TTL for RP announcement messages to 60 hops and explicitly configures the router to act as a Rendezvous Point.
While an ACL might be used to define RP group-lists, the `scope 60` in `send-rp-announce` specifically refers to the TTL of the announcement messages, not an ACL for administrative scoping.
The `scope 60` parameter in the `ip pim send-rp-announce` command specifies the Time-to-Live (TTL) for the RP-Announce messages, limiting their propagation to 60 hops.
The configuration is for PIM Sparse Mode; preventing a fallback to dense mode (PIM-DM) is usually controlled by other factors like `ip pim sparse-dense-mode` or the presence of an RP, not directly by this command.
The announcement interval is typically a configurable parameter, but `scope 60` refers to TTL, not the announcement interval. The command for interval would be `ip pim rp-announce-interval`.
The `ip pim send-rp-announce` command is used on the router that *is* the Rendezvous Point (RP) to announce its address and the group ranges it serves to the mapping agent, thereby explicitly configuring it as the RP.
Concept tested: PIM RP announcement and scope
Source: https://www.cisco.com/c/en/us/td/docs/ios/ipmulti/configuration/guide/imc_cfg_pim_send_rp_announce_v2_v3.html
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