Which protocol will not adhere to the design requirement of the control plane being either separated or combined within a virtualization technology?

The correct answer is B. STP. Answer B (STP) is correct. Spanning Tree Protocol operates per-VLAN but does not support true virtualization of its control plane in the way that other protocols do. In a virtualized network (e.g., using VRFs or VDCs), STP cannot be neatly separated into isolated virtual instance

Advanced Enterprise Campus Networks

Question

Options

AFHRP
BSTP
CCEF
DNSF with SSO

How the community answered

(41 responses)

A
12% (5)
B
49% (20)
C
34% (14)
D
5% (2)

Explanation

Answer B (STP) is correct. Spanning Tree Protocol operates per-VLAN but does not support true virtualization of its control plane in the way that other protocols do. In a virtualized network (e.g., using VRFs or VDCs), STP cannot be neatly separated into isolated virtual instances or cleanly combined - it leaks across virtualization boundaries because it is inherently a Layer 2 broadcast-domain-wide protocol. FHRP (A) supports virtualization through virtual router groups mapped to VRFs. CEF (C) is a forwarding mechanism that works within VRF-aware environments. NSF with SSO (D) supports stateful failover in virtualized contexts. STP is the protocol that does not cleanly comply with control plane virtualization design requirements.

Topics

#network virtualization#control plane separation#STP#FHRP

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