3/24/2023 0 Comments Gns3 cisco switches![]() The familiar commands from the global configuration mode of the router are available to configure VLANs and VLAN Trunking Protocol (VTP) settings. Multiple VLANs travel across a single link using a trunking protocol such as the industry standard 802.1Q or the Cisco-proprietary Inter-Switch link (ISL). VLANs allow broadcast domains to be isolated to specific ports across a number of switches in a layer 2 topology. S0(config)#interface range fastethernet 1/0 - 15 Use the switchport command to make the ports switched (rather than routed) ports, Let's get started with the basics of the layer 2 network.Ĭonfiguring the NM-16ESW for Switch-mode Operation In all of the examples, I will be working with the following topology using the Advanced Enterprise Services version of 12.4(15)T7, In this post, I will show how a Cisco c3725 with an NM-16ESW module can be configured to perform specific layer 2 functions such as Spanning Tree Protocol (IEEE, but not Rapid STP or Multipe STP ), VLANs, VLAN Trunking, VLAN Trunk Protocol (VTP). There are ways to perform some of the important features of the layer 2 network that managed switches provide when working with a routed (layer 3) network in GNS3. GNS3 and Dynamips are not good testing and training platforms for the CCNA, CCNP, or CCIE switching topics and not good tools for any IT training courses that need to cover switching related exam objectives. Why is this? Cisco has designed a number of application specific integrated circuits (ASICs) that have not been reversed engineered by the Dynamips team or anyone else in the community to create a viable software emulation. ![]() To clarify one thing at the beginning, there is no version of dynamips or GNS3 currently that has the capability of running a Cisco Switch IOS image. ![]()
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