Frame-Relay Hub Spoke Multipoint Configuration in GNS3

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Basic Frame-Relay Setup in GNS3

Frame-Relay is an older technology which is getting faded out with newer more robust protocols such as MPLS (Multiprotocol Label Switching) and DMVPN (Dynamic Multipoint Virtual Private Network). However, once in awhile you might still come across it or might need to setup a lab where Frame-Relay is involved. Below is a simple Frame-Relay Setup using GNS3:

Step 1) Build your network:

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Command rejected: An interface whose trunk encapsulation is “Auto” can not be configured to “trunk” mode.

Working on setting up a trunk interface on one of my switches, came across an issue that I just resolved. Thought I would share:

When I was first attempting to create a trunk interface I got the following error:

Example(config-if)#switchport mode trunk
Command rejected: An interface whose trunk encapsulation is “Auto” can not be configured to “trunk” mode.

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