A network administrator wants to provide high availability in a data center environment by making sure that there is no reconvergence of Layer 2 and Layer 3 protocols when there is a Layer 3 switch…

The correct answer is C. vPC. vPC (virtual Port Channel) enables two Nexus switches to act as a single logical switch from a downstream device's perspective. When one vPC peer fails, traffic continues flowing through the surviving peer without triggering Spanning Tree reconvergence (Layer 2) or routing…

Advanced Data Center Networks

Question

A network administrator wants to provide high availability in a data center environment by making sure that there is no reconvergence of Layer 2 and Layer 3 protocols when there is a Layer 3 switch failure. Which Cisco Nexus feature fulfills this purpose?

Options

AISSU
BVSS
CvPC
DMEC

How the community answered

(16 responses)

A
6% (1)
B
13% (2)
C
75% (12)
D
6% (1)

Explanation

vPC (virtual Port Channel) enables two Nexus switches to act as a single logical switch from a downstream device's perspective. When one vPC peer fails, traffic continues flowing through the surviving peer without triggering Spanning Tree reconvergence (Layer 2) or routing protocol reconvergence (Layer 3), because the downstream device's port channel simply loses one member link rather than losing its entire uplink. This achieves near-zero failover time with no protocol reconvergence. ISSU (A) is In-Service Software Upgrade, which allows software upgrades without reboots-not failover HA. VSS (B) is a Cisco Catalyst IOS feature for combining two switches, not a Nexus feature. MEC (D) stands for Multichassis EtherChannel, which is a generic concept-vPC is the Nexus-specific implementation that best satisfies the stated requirement.

Topics

#vPC#high availability#Layer 2 reconvergence#Nexus redundancy

Community Discussion

No community discussion yet for this question.

Full 300-320 Practice