Due to a major version change, an engineer must perform a software upgrade on a Cisco Nexus Series switch.
Which two technologies should be implemented to reduce disruptions to the network during the upgrade? (Choose two.)

A. vPC

B. HSRP

C. VDC

D. MLAG

E. PAgP






 

Suggested Answer: AB

vPC leverages both hardware and software redundancy aspects:
ג— vPC uses all port-channel member links available so that in case an individual link fails, hashing algorithm will redirect all flows to the remaining links.
ג— vPC domain is composed of two peer devices. Each peer device processes half of the traffic coming from the access layer. In case a peer device fails, the other peer device will absorb all the traffic with minimal convergence time impact.
Best Practices for HSRP/VRRP and vPC
This section describes best practices for using HSRP (Hot Standby Router Protocol) or VRRP (Virtual Router Redundancy Protocol) with vPC.
HSRP/VRRP active/active with vPC
ג€¢    HSRP (Hot Standby Router Protocol) and VRRP (Virtual Router Redundancy Protocol) are both network protocols that provides high availability for servers IP default gateway.
ג€¢    vPC domain at aggregation layer usually performs L2/L3 boundary so each vPC peer device is configure with interface VLAN (or SVI) and HSRP or VRRP runs on top of this interface.
ג€¢    HSRP and VRRP in the context of vPC have been improved from a functional and implementation standpoint to take full benefits of the L2 dual-active peer devices nature offered by vPC technology.
Reference:
https://www.cisco.com/c/dam/en/us/td/docs/switches/datacenter/sw/design/vpc_design/vpc_best_practices_design_guide.pdf

This question is in 350-601 DCCOR exam 
For getting CCNP Data Center Certificate


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