# L2 + L3 Etherchannel

**URL:** https://forum.networklessons.com/t/l2-l3-etherchannel/8139
**Category:** Routing & Switching
**Created:** [September 6, 2019, 3:43am UTC](https://forum.networklessons.com/t/l2-l3-etherchannel/8139 "2019-09-06T03:43:35Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![mfmolett](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/mfmolett/32/816_2.png) [@mfmolett](https://forum.networklessons.com/u/mfmolett)
#### Post date: [September 6, 2019, 3:43am UTC](https://forum.networklessons.com/t/l2-l3-etherchannel/8139/1 "2019-09-06T03:43:35Z")

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I have two 3850 switches connected to each other.

There is a layer 3 port channel and a layer 2 port channel created between SW1 and SW2. I am trying to understand why they setup a L2 and L3 on the switches…one for trunking and one for routing? Wouldn’t it be easier to keep it simple with one port channel and it would be layer 2 ? Is there a best practice ?

ROUTER ------SW1=======SW2

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### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [September 6, 2019, 4:35am UTC](https://forum.networklessons.com/t/l2-l3-etherchannel/8139/2 "2019-09-06T04:35:36Z")

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A post was merged into an existing topic: [Layer 3 Etherchannel](https://forum.networklessons.com/t/layer-3-etherchannel/622)

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### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [September 6, 2019, 4:35am UTC](https://forum.networklessons.com/t/l2-l3-etherchannel/8139/3 "2019-09-06T04:35:37Z")

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