200-301 · Question #993
Refer to the exhibit. A multivendor network exists and the company is implementing VoIP over the network for the first time. Which configuration is needed to implement the neighbor discovery protocol
The correct answer is B. SW1(config)#no cdp run. In a multivendor network, Cisco Discovery Protocol (CDP) is proprietary, so disabling it is a necessary step to ensure proper neighbor discovery across different vendor equipment or to transition to a vendor-neutral protocol.
Question
Refer to the exhibit. A multivendor network exists and the company is implementing VoIP over the network for the first time. Which configuration is needed to implement the neighbor discovery protocol on the interface and allow it to remain off for the remaining interfaces?
Exhibits
Options
- ASW1(config)#lldp run
- BSW1(config)#no cdp run
- CSW1(contig)#lldp enable
- DSW1(config)#no cdp enable
How the community answered
(27 responses)- A7% (2)
- B74% (20)
- C4% (1)
- D15% (4)
Why each option
In a multivendor network, Cisco Discovery Protocol (CDP) is proprietary, so disabling it is a necessary step to ensure proper neighbor discovery across different vendor equipment or to transition to a vendor-neutral protocol.
`lldp run` enables LLDP globally, which is useful in a multivendor network but does not address the need to manage other discovery protocols, especially if CDP is still active globally.
In a multivendor network, Cisco Discovery Protocol (CDP) is a proprietary Layer 2 protocol. Disabling CDP globally with `no cdp run` ensures that only vendor-neutral discovery protocols, like LLDP, are used, aligning with the multivendor requirement and providing a foundation for selective protocol implementation.
`lldp enable` is typically an interface-specific command in Cisco IOS; using it in global config context (`contig`) is syntactically questionable or incomplete for enabling LLDP globally.
`no cdp enable` is an incorrect command syntax for disabling CDP globally or on an interface; the correct global command is `no cdp run`.
Concept tested: Multivendor network compatibility (CDP vs LLDP)
Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_55_se/configuration/guide/scg/swcdp.html
Topics
Community Discussion
No community discussion yet for this question.