cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Cisco Community Designated VIP Class of 2020

207
Views
0
Helpful
3
Replies
Highlighted
Beginner

Is a L3 switch able to receive a WAN link? if the WAN circuit presentation is ethernet?

 

Hi experts,

The question is if a L3 switch is able to receive a WAN link which is Ethernet, at the same way than a router?

 

3 REPLIES 3
Rising star

It can, as can an L2 switch.

It can, but the most common issue with doing this is that only the really high-end L3 switches support NAT. So, unless you plan to run everything on the switch with public addressing, that limitation is likely going to be a problem.

VIP Expert

DisclaimerThe Author of this

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

To add to what Jody has already posted, L3 switches often lack features commonly found on routers.  Often such features are WAN related.  Jody mentioned one common WAN feature, NAT, but they might also lack certain hardware resources, such as sufficient capacity to take one or more full Internet route tables.

Even when running across MetroE clouds, often LAN L3 switches are still a bit "weak", for such usage, which is why Cisco has a series of MetroE switches.

The forgoing doesn't mean you cannot use a LAN L3 switch, just you need to be careful matching what the switch can do with your WAN feature needs.

Beginner

Thanks to all, appreciate

Thanks to all, appreciate your comments :D

CreatePlease to create content
Content for Community-Ad
FusionCharts will render here