How To Emulate Switches
These methods are not guaranteed to emulate 100% of the switching functions. However, they provide more than 90% of the switching features most network engineers need for CCNA/CCNP preparation. There are many options: GNS3 routers with NM-ESW16 modules GNS3 with Virtual IOS Layer 2 GNS3 with IOU L2 images Unified Networking Lab First, read this post to add IOS images. GNS3 routers with NM-ESW16 modules A router can be equipped with a NM-ESW16 module to fulfill the functions of an EtherSwitch Module. This module provides many layer 2 switch functionnalities. The only type of routers that supports the NM-16ESW EtherSwitch module and is also supported by GNS3 is the Cisco 3725 router. GNS3 with Virtual IOS Layer 2 Nathan Ash has written a clear tutorial for this. For the RAM value, choose something that’s higher than 380 MB then click Next . One thing to mention though. Make sure to choose the right version of Qemu binary when you add the vIOS-L2 image. I have a Windows 7 64 bits a...