There are a lot of articles out there on the web for Cisco's 3750 switches. However, there is no promise that those blogs will continue to stay up, so I've decided to create my own blog with my own experiences with Cisco's 3750-E's and 3750-X switches with many tips along the way! I decided to break ...

According to TechRepublic.com, SonicWALL's CSSA edges out Cisco's CCNA coming in at 5 and 6 respectively. I covered the CSSA course earlier this year that you can read here: SonicWALL CSSA I've honestly felt the last couple of years, Cisco has branched out a bit too far, this allowed other competitors into the market. With the recent downsizing ...

I recently came across this discussion and thought I'd shed some light. A user wants to deny all traffic outbound a specific interface. Let's say it is ethernetO. The best way to test this is to create an ACL and apply it to your interface outbound, and ping out from an internal device. You won't ...

This is a review of Implementing Cisco Switched Networks (SWITCH) Foundation Learning Guide. Written by CCIE's Richard Froom CCIE# 5102 and Erum Frahim CCIE# 7549 and Balaji Sivasubramanian. This is an excellent book on switching fundamentals. It clearly explains VLAN's, how and where to use them. How the old 80/20 rule is now 20/80. Security topics ...

You can learn all you want about ACL's until you're blue in the face, but what if the traffic never traverses an interface? How do you control traffic within a VLAN? That's where VACL's come in. VLAN access-lists can handle packets within a VLAN since there are no actual IN/OUT direction to be applied as you ...

In this lab, we're going to take a look at autosensing the LMI signaling protocol. As we've seen in Lab#01, you need this to be correct in order to bring the link up. We'll start with the frame relay switch configuration. FRAME RELAY SWITCH RTR-3620#config t RTR-3620(config)#frame-relay switching RTR-3620(config)#int s1/1 RTR-3620(config-if)#encapsulation frame-relay RTR-3620(config-if)#clock rate 64000 RTR-3620(config-if)#frame-relay intf-type dce RTR-3620(config-if)#end RTR-3620#sh run int s1/1 Building configuration... Current configuration ...

In this lab, we're going to hit two birds with one stone. We're going to learn how to configure Cisco routers for frame relay, as well as the configuration for the actual frame relay switch. The frame relay switch will be a regular router. In this case, it's going to be a 3620 router that ...

Here's another lab from Dave Hucaby. As always, please try to do them yourself before looking at the possible answers below: http://dhucaby.wordpress.com/2010/06/15/scenario-2-securing-a-trunk/ Dave's original question: Today’s scenario involves securing a trunk between two switches… A user PC A is located on Switch A with the interface configuration shown in the diagram below. A different user PC X is located ...

In another lab created by Dave Hucaby, we look at playing with VLAN trunking and mixing and matching native vlan's and what the effects of doing so are. As always, you can view his original lab here: http://dhucaby.wordpress.com/2010/06/11/new-scenario-vlan-trunking-1/ Here is his original question: Here’s a new scenario to think about. I haven’t built it in a lab yet, ...

This blog is going to be an attempt to lab up one of David Hucaby's lab scenarios that he posted here: http://dhucaby.wordpress.com/2010/06/04/ccnp-switch-planning-topics/ I'm going to include as much detail as possible so you can follow every step of the way. Since I don't have all the equipment in David's scenario, I'm going to be modifying the ...