DRAG DROP
Drag the network characteristic on the left to the design method on the right which will best ensure redundancy at the building distribution layer.
Select and Place:
Explanation/Reference:
Explanation:
Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches
-> Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches
Layer 2 between distribution and access layers, with a Layer 2 link between the distribution switches
-> FHRP for convergence, no VLANs span between access layer switches across the distribution switches
VSS -> Convergence (FHRP) is not an issue
The following are recommended best practices at the distribution layer:
. Use First-Hop Redundancy Protocols. Hot Standby Router Protocol (HSRP) or Gateway Load Balancing Protocol (GLBP) should be used if you implement Layer 2 links between the Layer 2 access switches and the distribution layer.
. Use Layer 3 routing protocols between the distribution and core switches to allow for fast convergence and load balancing.
. Use the distribution switches to connect Layer 2 VLANs that span multiple access layer switches.
. Use Virtual Switching System (VSS) to eliminate the use of STP and the need for HSRP.
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 3
