A network engineer has to decide between a Layer 2 Access Layer (STP-based) and a Layer 3 Access Layer (Routed access) campus design option. Which statement must be considered for a decision to be made?

IT Questions Bank › Category: CCNP › A network engineer has to decide between a Layer 2 Access Layer (STP-based) and a Layer 3 Access Layer (Routed access) campus design option. Which statement must be considered for a decision to be made?

The STP based access option supports spanning VLANs across multiple access switches, whereas the Routed access option does not.
The Routed access option is the best cost-effective solution.
The STP based option does not require FHRP, whereas the Routed access option does.
The Routed access option offers easier troubleshooting than the STP-based option.

Explanation: The Routed access design has a number of advantages over the STP-based design:

No FHRP required – no need for FHRP protocols such as HSRP and VRRP.
No STP required - since there are no L2 links to block, this design removes the need for STP.
Easier troubleshooting - It offers common end-to-end troubleshooting tools (such as ping and traceroute).

The Routed access is an excellent design for many environments, but it has the same limitation as the STP-based design, in which it does not support spanning VLANs across multiple access switches. Additionally, it might not be the most cost-effective solution because access layer switches with Layer 3 routing capability might cost more than Layer 2 switches do.

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