200-155 · Question #155
Where do all Layer 3 interfaces exist until they are assigned to another VRF?
The correct answer is C. the default VRF. This question asks about the default assignment of Layer 3 interfaces in a network device configuration context, specifically concerning Virtual Routing and Forwarding (VRF).
Question
Where do all Layer 3 interfaces exist until they are assigned to another VRF?
Options
- Athe management VRF
- Bthe admin VRF
- Cthe default VRF
- DVRF 0
How the community answered
(39 responses)- B5% (2)
- C92% (36)
- D3% (1)
Why each option
This question asks about the default assignment of Layer 3 interfaces in a network device configuration context, specifically concerning Virtual Routing and Forwarding (VRF).
The management VRF is a specific, isolated VRF instance dedicated to management traffic and is not where all Layer 3 interfaces are initially placed.
An 'admin VRF' is not a standard or commonly recognized term for the default VRF in network device configurations.
In network devices that support Virtual Routing and Forwarding, all Layer 3 interfaces are by default part of the global routing table. This global table is commonly referred to as the default VRF, where interfaces reside until explicitly assigned to a different user-defined VRF instance.
While some internal implementations might use an ID like 'VRF 0,' the standard and universally recognized term for the initial VRF where all unassigned interfaces reside is the 'default VRF' or the global routing table.
Concept tested: Default VRF assignment for Layer 3 interfaces
Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/16-12/configuration_guide/ip_routing/b_1612_ip_routing_9300_cg/configuring_vrfs.html
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