VLAN Trunk Protocol (VTP) is a Cisco-proprietary protocol used to replicate VLANs using Layer 2 trunk frames to other switches. It is a method to ease administration by selecting a switch to be configured as a VTP server. VLANs are configured on the VTP server and then replicated to other connected switches, called VTP clients….
[youtube http://youtu.be/uU1CRuuSBQo] A trunk will allow multiple VLANs to transport between switches. Trunk ports can be configured in two ways, the Cisco proprietary Inter-Switch Link, ISL, or with the standard IEEE 802.1Q Personally, I don’t use ISL and you shouldn’t either. But lets understand its differences with 802.1Q. Inter-Switch Link (ISL) ISL is Cisco proprietary in…
[youtube http://youtu.be/ppjHhL5lh3k] VLAN configuration is an objective for CCNP SWITCH 642-813 and CCNA 200-120. The following tutorial goes over the objectives: Implement VLAN based solution, given a network design and a set of requirements (CCNP SWITCH 642-813) Describe how VLANs create logically separate networks and the need for routing between them (CCNA 200-120) Configure and verify…
You get very excited once you get your own physical lab of routers and switches going. You just can’t wait to start managing and configuring switchport security, spanning-tree, etc. And then you get tired of having to move the console cable from one switch to the other. And you don’t have the ability to play…
Putty is a widely used, free, tool to SSH/Telnet/Console/etc into a network device. I can’t recall how many times I’ve burned myself because I fat-fingered the keyboard and then lost my connection to the network device or misconfigured an interface and not realize it for a couple of days. Or what if you wanted to…
When working in CLI there are different modes you can work in. Depending on the mode, you will have specific commands available to you. User Exec SDG-SWITCH> This is the mode you begin with when you start a session using Telnet, SSH, or consoled into the switch. There are only a subset of commands available…
We dig in deeper into the operations of a switch in the CCNP SWITCH Official Certification Guide. The CAM table is one of the fundamental operations of a switch. It’s not only important for the 642-813 SWITCH exam but it’s important to know for working on the job. The CAM table, or content addressable memory table,…
VLANs are in every network environment. Whether you’re configuring end-to-end or local VLANs you are segmenting the network into logical groups. Before getting into the configuration of a VLAN, there are some best practices to be aware of: Avoid using VLAN 1. Put unused ports on an unused VLAN. I like to use VLAN 999….
