CCNP Data Center Question of the Week: Aggregation Layer

Which three are characteristics of the aggregation layer of a Cisco Data Center Unified Fabric network? (Choose three.)

A. no packet filtering
B. QoS – policing
C. Voice, data, and wireless convergence
D. Scalable routing protocols
E. Provides redundant default gateways using FHRP
F. QoS – classification and queuing
G. Routing manipulation and filtering
H. Aggregates end users

Reveal Answer

Answer: B, E and G.

Cisco recommends a three layered model for the data Center, for scalability and reliability. The three layers are Access, Aggregation and Core. The aggregation layer is the L3 and L2 boundary for the data center infrastructure. In common designs, the aggregation layer is also the connection point for data center firewalls and other services. Thus, it consolidates L2 traffic in a high-speed packet switching fabric and provides a platform for network- based services at the interface between L2 and L3 in the data center. Typically, the aggregation layer is made up of two or more switches and is the demarcation point for the VLANs facing into the access layer and the path into the core. This is where we would run our FHRP (like HSRP or VRRP); routing and layer 3 filtering would be applied; and where QoS policy would be applied.

 

Related Courses
DCUCI – Data Center Unified Computing Implementation v5.0
DCUFI – Implementing Cisco Data Center Unified Fabric v5.0
DCUCD – Designing Cisco Data Center Unified Computing v5.0
DCUFD – Designing Cisco Data Center Unified Fabric v5.0
DCUCT – Troubleshooting Cisco Data Center Unified Computing v5.0
DCUFT – Troubleshooting Cisco Data Center Unified Fabric v5.0

Related Certification
CCNP Data Center

CCNP Data Center Question of the Week Series

• CCNP Data Center Question of the Week: Cisco Technology
• CCNP Data Center Question of the Week: Aggregation Layer

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