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 ...
I learned this new trick from reading an old CCIE book. If you want to keep an interface with up/up status with no cable connected to it, especially for simulation purposes all you have to do is disable the keepalive like so: Router#sh ip int brie Interface IP-Address OK? Method Status Protocol FastEthernet0/0 unassigned YES unset administratively down ...
There are reports of the new iPhone 4 causing wireless issues if you hold the phone properly. Basically, holding it like a normal person. You can read the full article here. http://gizmodo.com/5571171/iphone-4-loses-reception-when-you-hold-it-by-the-antenna-band This is a reader video found on Macrumors forums illustrating something weird. When the guy holds the iPhone in his hands, touching the outside antenna ...
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 ...
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 ...
Today my copy of "Cisco LAN Switching Fundamentals" has arrived. Written by CCIE's David Barnes #6563 and Basir Sakandar #6040. John Tiso CCIE #5162 is credited as contributing author. Now, when you're searching for routing books, you will get hundreds of results. There does seem to be a lack of switching books. Sure, you'll find those ...
