L2 versus L3 on your WAN

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Tags:
L2 Switches
L3 Switches
Layer 2
Layer 3
Network Security Policies
Networking security
WAN
Wide Area Networks
We are running Comcast Fiber between sites.  I was wondering what the best practice is for using Layer 2 or Layer 3 across the link.  We current use both.  Are there security reasons for doing one versus the other?  Also interested in hearing general thoughts on it.

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Always Layer 3 links are better when using for the WAN, first and foremost you can make sure the traffic is encrypted and secured, if you have multiple VLANs then the link should be a trunk link (if layer 2 link is used) where as if you use a layer 3 link then you can route the required VLANs only. Layer 3 links are easy to toubleshoot compared to layer 2, with layer 3 the security options are more comparedf to layer 2 links, Access list works better with layer 3 link, you can use radius servers as well.

Cheers

Yasir

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