WLC: Show run-config [no-ap]

 

If you ever did a show run-config on a WLC with a 100 access points then you know where I am going! 

A show run config [no-ap] will omit the access point information. Why is this important? Well suppose you have a WiSM with a 150 access points joined to a controller do you want to see 400 pages of configs of APs when you only want to see the run-config ? BINGO!

(Cisco_2006_WLC) >show run-config ?

[no-ap]        Display running configuration of controller without AP configuration

Cisco / Intel "E2E" End-2-End Client Enhancements

 

Did you know Cisco and Intel have a joint program called E2E which enhances roaming !? Its called E2E, End-2-End.

A google search yields almost nothing on the technicals of this technology other then what is mentioned in the Cisco deployment guides. As early as Cisco code release 4.0 through 6.0 mentions "E2E".  It states the following:

Enhanced neighbor list request (E2E)—The End-2-End (E2E) specification is a Cisco and Intel joint program that defines new protocols and interfaces to improve the overall voice and roaming experience. It applies only to Intel clients in a Cisco Compatible Extensions environment. Specifically, it enables Intel clients to request a neighbor list at will. When this occurs, the AP forwards the request to the WLC. The WLC receives the request and replies with the current Cisco Compatible Extensions roaming sublist of neighbors for the AP to which the client is associated.

You can do the following commands to determine if your Intel clients are E2E compatible:

(Cisco_2006_WLC) >show client detail <Client Mac Address>

(Cisco_2006_WLC) >show client detail 00:21:6a:11:a8:02

Client MAC Address............................... 00:21:6a:11:a8:02

Client Username ................................. unknown

AP MAC Address................................... 00:1c:b0:06:d2:d0

Client State..................................... Associated

Wireless LAN Id.................................. 1

BSSID............................................ 00:1c:b0:06:d2:d0

Connected For ................................... 3165 secs

Channel.......................................... 11

IP Address....................................... 10.10.0.243

Association Id................................... 2

Authentication Algorithm......................... Open System

Reason Code...................................... 0

Status Code...................................... 0

Session Timeout.................................. 0

Client CCX version............................... 4

Client E2E version............................... 1

QoS Level........................................ Silver

Diff Serv Code Point (DSCP)...................... disabled

802.1P Priority Tag.............................. disabled

WMM Support...................................... Disabled

Power Save....................................... OFF

Current Rate..................................... 54.0

 You can also view this in the gui. 

WIRLESS-->CLIENTS-->DETAIL

Cisco CCIE Wireless Training Offerings from FAST LANE

 

Jerome Henry from Fast Lane has developed the first of its kind, CCIE Wireless Training material labs, workbooks and boot camps. Jerome is the 3rd person to achieve the CCIE Wireless Certification and the first NON-Cisco employee! I'm a big fan of Jerome's. Keep up the great work! If you would like to see Jeromes work, follow his blog on my blogroll call.

Fast Lane CCIE Offerings

Fast Lane is proud to offer expert-level training covering the most coveted Cisco certifications available today, CCIE. Each of our programs are delivered by Cisco Certified Instructors, who also hold the certification for the courses they teach. When you attend our CCIE Wireless Bootcamps, you will be trained by a CCIE Wireless certified instructor. The way we see it, how can you expect to be successful in acquiring your CCIE when you are prepared by an instructor who has not experienced that success? At Fast Lane, you will get the highest-quality training from the most technical instructors teaching today.

As a Cisco Learning Solutions Partner (CLSP), all of the Cisco courses we develop independently must be reviewed and approved via Cisco’s rigid approval process. For example, the CCIE Wireless offerings below have all been approved by Cisco.

Fast Lane’s CCIE Wireless Program

Fast Lane is first to market with a CCIE Wireless Preparation Program. Designed and developed by the first CCIE Wireless (outside of Cisco Systems), our CCIE Wireless offerings include multiple learning products to give you the ultimate training experience. These products are designed to allow you to pick one or all products depending on your needs and learning style. You may choose from either of two five-day instructor-led bootcamps, two Study Guides: “Volume 1: Mastering the Technology” and “Volume 2: Increasing Speed and Skills” (available in April 2010), and a comprehensive set of remote labs that complement the study guides.

Pick from the list below to start your training: 

Pick from the list below to start your training:

• CCIE Wireless Written Bootcamp
• CCIE Wireless Lab Bootcamp
• CCIE Wireless Workbook Package (includes remote labs)
• CCIE Wireless Workbooks
• CCIE Wireless Remote Labs

Cisco CCIE 360 Learning Program

Fast Lane is proud to be Cisco’s only worldwide delivery partner of the CCIE 360 Learning Program.

Recently, Cisco redesigned their Authorized CCIE curriculum into a more engaging set of options that allow you to design a custom learning solution that makes sense for you. This new program is called the Cisco CCIE 360 Learning Program, and includes offerings for the CCIE Routing and Switching Exams (Written and Practical) and the CCIE Voice Exams. The Cisco CCIE 360 Learning Program develops expert-level skills through a structured combination of online learning tools and materials, resources for hands-on practice, access to qualified subject matter experts, and regular feedback and progress assessments. Multiple learning products and services are blended to provide you with a customized learning experience. These high-quality, content-rich programs provide you with the capability to map out a training plan for achieving your CCIE goals. The different components can be matched to your skill level, learning preference, and budget to give you maximum flexibility.

Fast Lane has created both value-priced packages and individual products to help you stay within your budget.

Program Benefits:

• Cisco Authorized learning content aligned to CCIE certification expectations
• Choice of components to fit different learning styles and budgets
• Flexible, 24/7 remote access
• Progress reinforced by frequent learning assessments
• Learning suggestions tailored to assessment performance
• Available worldwide from Cisco’s most trusted CLSP
• Delivered by qualified Certified Cisco Systems Instructors
• Online Learning Management System to manage and track your progress

Program Components:

• Assessment: Take a diagnostic pre-assessment lab to benchmark your knowledge of various networking topics.
• Planning: Based on the pre-assessment, create a learning plan that uses a mix of learning components to focus your efforts.
• Learning: Learn by participating in lessons and lectures, reading materials, and working with peers and instructors.
• Practice: Use the practice exercises to apply the lessons learned on live hardware.
• Mastery: Further measure your understanding of the different approaches to solving network problems by completing knowledge and skill-based assessments.
• Review: Review your work with a mentor and fine tune your skills based on the tips and best practices provided. 

leeched from http://www.fastlaneus.com/article/4717?hl=cciew 

A Milestone Reached: Cisco All Time Wireless Leader Board

 

A while ago my aim was to make the Cisco all time wireless leader board. This week that mile stone was achieved. My efforts here at my80211.com extends to many forums and Cisco netpros is just one of them.

I learned early, in order to stay fresh in technology you need to keep a book in your hand, a pdf on your screen and a forum to contribute. Lets face it, things change and they change fast. Back in the day, we were all known as the "computer guy". Today, you are a wireless guy, a routing+switching guy, security guy, voice guy or a server guy.

Today's technology has made us all specialist, subject matter experts and gurus in our area of expertise. Wireless by far is the smallest group in the industry when compared to routing and switching or security for example. These guys are a dime a doze :). But a good wireless engineer... hard to find and few and far between. 

I truly enjoy sharing and helping others when it comes to their wireless needs. I can recall like it was yesterday when an access point was flopped on my lap and I had no idea what it was or what it really did. It was a little intimidating in fact. Today, designing the RF and wired side for 100-1000 access points is just another day at the office.

If you are new to wireless. I might suggest you squat forums like CWNP and Cisco Netpros on a daily.  You may not have anything to contribute at first. But sit back and take all the questions and answers in. You will be surprised when you are in the field and you are faced with an issue you may have read about in a forum somewhere.

 I hope you find my80211 journey helpful!

Thanks

Meraki Virtual Stumbler

 

This is the first virtual Stumber of it's kind and you don’t have to be connected to the internet for it to work either (FireFox ONLY!). I had a friend call me this evening with a wireless issue and he didn’t have a wifi scanner installed. This is the next best thing! NO APPS OR DRIVERS TO INSTALL!

This virtual stumbler fits the bill for residential and hobbyist wireless users alike! And the price, its right, FREE! So how does it work you ask? Simply visit http://tools.meraki.com/stumbler and it will use your existing wireless card to scan the environment. No applications or drivers to install -- at all "SWEEEEET".

Q: What is the WiFi Stumbler?

A: The WiFi Stumbler is a browser-based wireless scanner tool that detects 802.11 wireless networks and displays useful information about the networks in an easily searchable, intuitive web interface. WiFi Stumbler can be used to optimize wireless network coverage, troubleshoot performance issues, detect rogue APs and perform basic pre-deployment site surveys.

Q: Can I use WiFI Stumbler when I am not connected to the Internet?

A: If your browser supports offline mode (currently only Firefox), then it can load WiFi Stumbler from its offline cache. This means that WiFi Stumbler will work in these browsers even when you are not connected to the Internet, as long as your wireless card is enabled. Simply visit the Stumbler page using Firefox once you are connected to the Internet. The site will ask for permission to use offline storage. Grant this permission, bookmark the page and you can revisit whenever you need to use WiFi Stumbler.

Q: How does the WiFi Stumbler work?

A: WiFi Stumbler captures data about nearby wireless networks from your computer's wireless card and displays it as a web page. It can even work when you are not connected to the Internet if your browser supports offline mode (currently Firefox only).

Q: Why is Stumbler a web-based tool instead of standalone, downloadable software?

A: By running in a browser, there is no need to download software to your computer. This makes it very easy to load and use since no software installation is required. It also can run on either a PC or Mac, unlike most downloadable software applications. In addition, as we will be continually adding new features to Stumbler, you will automatically get the latest version of the tool each time you reload the page.

Q: The WiFi Stumbler doesn't load on my computer/in my browser. Why not?

A: WiFi Stumbler requires Java support and does not currently support Linux. If your browser does not support Java or you are running Linux and you try to load WiFi Stumbler, you will receive an error message in your browser window. Currently, Google Chrome for Mac does not support Java so it will not run WiFi Stumbler. WiFi Stumbler is also currently a beta stage tool; if you encounter other problems getting Stumbler to load, please let us know using the Make a Wish box at the bottom of the page.

Q: Why do some networks appear in gray and others are in dark gray?

A: Networks appearing in light gray were not detected in the latest scan but were detected recently. The last time a network was detected by Stumbler will appear under the "Last Seen" column. If an access point stops broadcasting its SSID (eg. it was unplugged) or local RF interference or environmental obstructions prevent broadcast beacons from reaching your client then the network might "disappear" for a few seconds, in which case it would turn light gray until it is picked up in another scan.

Q: Why don't all of my network broadcast SSIDs appear in the Network List?

A: If an SSID is broadcasting in 5 GHz only and the wireless card in the client on which you are running Stumbler on does not support 5 GHz then the SSID will not appear in the Network List.

Q: What does "Hidden" mean under BSSID name?

A: If a network owner has disabled SSID broadcasting on their network, then the SSID is now "hidden". What that means is that the SSID name is no longer included in the the periodic broadcast beacons from the access point that alert local clients to the network. This is sometimes done as a security measure, as only clients that know the name of the network (or who use "sniffer" software programs) can associate to the network.

Q: Why does the same SSID appear twice with different MAC addresses?

A: If there are multiple access points in a network all broadcasting the same SSID, each AP will appear individually in WiFi Stumbler showing the same SSID. Also, if an access point contains multiple radios that are broadcasting the same SSID, each radio will appear individually in the WiFi Stumbler network list.

http://tools.meraki.com/stumbler

Site Survey Hint: Attach your WiFi Phone to your Survey PC (VoIP Assessment)

 

Having conducted more surveys then a belt will allow notches you start to find ways to improve your survey skill set with accuracy and speed. One of these ways came to me completely by accident one day many years ago at lunch.

If you are new to surveys or perhaps you have a few hundred already under your belt. The common theme to a good active survey is to understand your lowest powered clients and sensitive applications and their limitations. It is also important to understand the environment in which these devices will operate. Then calibrate your survey cards to these lower devices, which can be tricky for someone with limited experience.

There are many decent tools in which you can conduct active site surveys. One of these tools in which I am very familiar with is AirMagnet Surveyor. But never ever assume ANY old wifi card is OK to conduct a survey. In fact, when conducting active surveys you want to use the identical card or one very close to which will be used by your customer.

Example -- If you are surveying for Vocera B2000, Cisco 7921,7925, Ascom i75 deployment you don’t want to roll in with a 200mW card or a crappy chipset and let it run loose!?

When I survey for a Voice assessment I like to use that device during my assessment. Why? Because you know WITHOUT QUESTION how that phone / vocera badge / ascom phone will operate.

When I survey for a Vocera deployment, I will use the badge in survey mode in combination with AirMagnet. I will wear the badge around my neck enter the room, door closed and my back to the door and see what the Vocera badge is telling me. You will be surprised when you see what a pcmcia card reads and what the badge reads! In fact the majority of Vocera deployment failures is due to poor assessments. Thus the reason why Vocera has pulled in the assessment portion for their deployments.

Same holds true for handset deployments with Cisco, Ascom and others. These devices have a site survey mode as well. I will put these devices in site survey mode and use in combination with AirMagnet. Then one day at lunch many years ago I attached my Cisco handset to my laptop! Light bulb went off! What better way to survey and easily see the phones survey readings!

I hope you find this helpful during your surveys as well!

WLC - Cisco LWAPP/CAPWAP QoS Tagging Slide

 

In coming weeks I will share with you a number of QoS labs with LWAPP/CAPWAP and autonomous access points and controllers. In advance to that, I wanted to share this LWAPP/CAPWAP QoS Tagging slide. 

This slide comes from the config guide. 

WLC - Did you know the Cisco WiSM doesn't support CDP!?

 

Did you know that the Cisco WiSM doesnt support CDP (Cisco Discovery Protocol)? Odd, isn't, but it doesn't.

CDP is not supported on the controllers that are integrated into Cisco switches and routers, including those in the Catalyst 3750G Integrated Wireless LAN Controller Switch, the Cisco WiSM, and the Cisco 28/37/38xx Series Integrated Services Router. However, you can use the show ap cdp neighbors detail {Cisco_AP | all} command on these controllers in order to see the list of CDP neighbors for the access points that are connected to the controller. - (Cisco 6.0 Config Guide)

What this means is that if you do a CDP on the CAT that houses the WiSM you won't see the WISMs as
a neighbor. Here is an example of a CAT with WiSMs and the CDP command is entered: 

6509#show cdp neighbors

Device ID        Local Intrfce     Holdtme    Capability  Platform  Port ID

6509LAB1

                 Gig 1/1            166         R S I     6504LAB  Gig 1/1

6509LAB2

                 Gig 1/2            150         R S I     6504LAB  Gig 1/2  

How you can see the WiSMs is with the show module command. See below:

6509#show module

Mod Ports Card Type                              Model              Serial No.

--- ----- -------------------------------------- ------------------ -----------

  1    2  Supervisor Engine 720 (Active)         WS-SUP720-3B        XXXXXXXXXX

  2   16  SFM-capable 16 port 10/100/1000mb RJ45 WS-X6516-GE-TX     XXXXXXXXXX

  3   10  WiSM WLAN Service Module               WS-SVC-WISM-1-K9             XXXXXXXX

  4   10  WiSM WLAN Service Module               WS-SVC-WISM-1-K9             XXXXXXXX

CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204 RELEASED!

 

The new Certified Wireless Security Professional Official Study Guide was released today! If you are looking to brush up on your 802.11 skill set or perhaps you want to pursue the CWSP certification this read is a MUST HAVE in your arsenal of reading!! 

The CWSP PW0-204 is authored by: David D. Coleman (Author), David A. Westcott (Author), Bryan E. Harkins (Author), Shawn M. Jackman (Author). This is an author list of who is who in 802.11 and sure not to disappoint. 

I've had the pleasure to work with Shawn Jackman. You wouldn't find a better teacher, mentor and 802.11 expert in the industry today! 

Jennifer Huber: Lab attempt 02/02/2010 - first go round with the lab

 

If you have dreams of being a Cisco CCIE Wireless Expert and you aren't following Jennifer Huber CWNE#51's blog, then you should be! Jennifer just recently attempted the Cisco CCIE Wireless Lab this week. This was her first attempt.

At last count only 17 folks have passed the CCIE Wireless Lab. Just to give you an idea, San Jose is booked till August 2010!! 

Jeniffer Huber's Blog Post:

http://jenniferhuber.blogspot.com/

Well, I suppose I should put a few words together about my first experience at sitting for a Cisco CCIE Lab.  I didn't expect to pass, considering that there isn't any formalized training available for the wireless lab like there is for all the other CCIE tracks.  I scored a 60, and needed an 80 to pass.  I signed up for the next exam right after checking my score, and the earliest available date is was in August, so I booked the date.

I was glad that someone recommended that I bring ear plugs - they were a godsend since the CCIE Pod 01 I had was right next to the racks of equipment.  I had originally thought the ear plugs were so you didn't hear any one elses' freak out..  I couldn't hear anything over the noise of the rack w/o them & was glad for the quiet they provided.

I lost some time trying to figure out which shortcut on the desktop led to the PC that would let me web into the controllers once I'd gotten them initially configured.. I guess I should have asked about that sooner instead of waiting till after lunch.  I really didn't like the way the tasks were laid out in the book.  I felt that the information I needed was scattered around within the text, and the key pieces of information could have been laid out more clearly.  I guess that is part of the point of the lab though - and I need to come up with a way to lay out the information I'll need for all the configuration before I start.  I spent a lot of time flipping back and forth through the diagrams and scenarios looking for naming conventions and vlan numbers when if I had made my own "spreadsheet" it would have been one stop shopping.

Now that I know what I'm up against, I have drawn up a better plan of attack.  I have to be *much* quicker at the CLI of IOS APs and for WLCs.  I couldn't have anticipated how little time I'd have to complete each task correctly within the 8 hours allotted for the lab.

packetlife.net - 802.11 Reference Sheet

 

If you haven't visited packetlife.net then what are you waiting for !? Great site for the IT novice and professional. Focusing on routing and switching and they offer an impressive lab for FREE! Yes, i said FREE. 

Jeremy @ packetlife.net did a great job on these IEEE 802.11 quick reference sheets. These will certainly help in your journey with 802.11. Perhaps you are studying for your CWNA, CWSP or one of the many Cisco wireless certs. These reference sheets will not disappoint. In fact, you cant beat the price, FREE. These print out in color beautifully.   Jeremy Stretch did a great job putting these together. 

LINK: http://www.packetlife.com/media/library/4/IEEE_802.11_WLAN.pdf



Cisco – Cisco vs Aruba Client Density test with 802.11n

 

Cisco released another video on youtube.com. Where they conducted client density testing with a Cisco 1142s against Aruba's AP-105 and AP-125. The test was conducted with 2.4 GHz non-bonded and 5 GHz with channel bonding. Although, I would have liked more details on how the test were conducted and were the results consistent.

This video explains competitive WLAN high density test results assessing Cisco's AP1140, Aruba's AP-105 and AP-125 in the area of bandwidth fairness. For this test, each 802.11n Access Point was loaded up with 60 Intel 802.11n clients all attempting to download data simultaneously. Throughput per client was assessed using VeriWave's WaveAgent software which generated downstream TCP traffic.

Link: http://www.youtube.com/watch?v=Z5LLg6aky6A

Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) LEDs

 

Something you need to know if you plan to take any level of Cisco wireless certifications and more importantly in the field is the status LEDs on the Cisco Wireless CB21.

Easy way to remember:

Alternate blinking; think of SCANNING back and forth looking for a network

Both LEDs blinking slowly; means connected. Think of a pulse 

Both LEDs blinking fast; transfer data

The 2 other status LEDs you need to worry about are the POWER SAVE indications. Only the GREEN indicator is used.  

 

Airmagnet / Fluke SpectrumXT

 

If you've been under a rock or locked at the office then you may have missed the new Spectrum announcment offering from Airmagnet / Fluke. Its called the SpectrumXT.  I've always said, "An engineer without a spectrum card, is a carpenter without his hammer" - George Stefanick

Spectrum cards are $$$ and are often out of reach of some folks. AirMagnet made an early attempt with the Intel 5300 spectrum offering. I wasn't really a big fan of this offering, but customers who had a price point seen this as an attractive alternative to the higher price Cisco / Cognio offering. 

 

I haven't personally tested the SpectrumXT yet; I did say YET! But i already like the form factor, USB. If you haven't noticed PCs are being manufactured without PCMCIA slots making the Cognio offering a bit challenging to work with. Of course you can purchase the extension, but its pretty darn ugly and hangs like 10 feet out from your PC just waiting for something to hit your $3,000 card! 

And as you would expect, SpectrumXT integrates into Survey PRO and WiFi Analyzer PRO.

Early reviews from industry experts are favoring the SpectrumXT. 

 

Marcus Burton article @ CWNP
http://www.cwnp.com/community/articles/fluke_competes_with_cognio.html

AirMagnet Link
http://www.airmagnet.com/products/spectrum_xt/ 

What is the difference between a Cisco 1141 and 1142 Access Point?

 

You hear the term; Cisco 1140 series access points. So why do they call it series ? Because there are "2" models of 1140 series access points.

Cisco 1141 is a single band 2.4 GHz access point. This model doesnt support the 5 GHz band.

802.11g/n Controller-based AP; Int Ant; FCC Cfg

Cisco 1142 is a dual band 2.4 GHz / 5 GHz access point.

802.11a/g/n Controller-based AP; Int Ant; FCC Cfg

If you are deploying just 2.4 GHz 802.11g/n and have no furture need for the 802.11a/n band, then

you may want to consider the cost savings by ordering the 1141 model.

WLC - Configure Administrator User Names and Passwords in CLI

 

How to add / delete /change a user in the WLC via the CLI and apply your permissions.

To add a new user with READ or READ/WRITE permissions. First drop into the CLI of the WLC. Next, lead with the following:

CONFIG MGMTUSER  <ADD> <USERNAME> <PASSWORD> <READ-WRITE or READ-ONLY>

You have other options such as delete, description, and password.

(Cisco-2006) >config mgmtuser ?

add            Creates a local management user.
delete         Delete an existing management user.
description    Sets the description for a management user.
password       Configures a password for a management user.

When you add a user you have 3 permissions:

(Cisco-2006) config>mgmtuser add username password ?

read-write      Creates a management user with read-write access.
read-only        Creates a management user with read-only access.
lobby-admin    Creates a management user with lobby ambassador priviledges.

If you need to change the password of an existing user lead with the following:

CONFIG MGMTUSER  <PASSWORD> <USERNAME><PASSWORD>

To display your existing users use the show mgmtuser command:

(Cisco-2006) >show mgmtuser
User Name                 Permissions    Description
-----------------------   ------------   --------------------------------
cisco                     read-write
george                  read-write
lobby                    lobby-admin

NOTE -- User Names and Passwords are CASE SENSITIVE

WLC How to enable webmode (HTTP) or secureweb (HTTPS)

 

Enabling / Disabling HTTP or HTTPS on a Cisco WLC is simple. Keep in mind, if you enable/disable HTTPS you need to do a WLC reboot (ouch for you change control folks!). 

Enable HTTP 

(Cisco-2006) >config network webmode enable

DISABLE HTTP

(Cisco-2006) >config network webmode disable

ENABLE HTTPS

(Cisco-2006) >config network secureweb enable

You must reboot for the change to take effect.

DISABLE HTTPS

(Cisco-2006) >config network secureweb disable

You must reboot for the change to take effect.

SHOW WEB MODE STATUS

(Cisco-2006) >show network summary

RF-Network Name............................. test

Web Mode.................................... Enable

Secure Web Mode............................. Enable

Secure Web Mode Cipher-Option High.......... Disable

Secure Web Mode Cipher-Option SSLv2......... Enable

Secure Shell (ssh).......................... Enable

Telnet...................................... Enable

Ethernet Multicast Mode..................... Disable   Mode: Mcast  0.0.0.0

Ethernet Broadcast Mode..................... Disable

IGMP snooping............................... Disabled

IGMP timeout................................ 60 seconds

User Idle Timeout........................... 300 seconds

ARP Idle Timeout............................ 300 seconds

ARP Unicast Mode............................ Disabled

Cisco AP Default Master..................... Disable

Mgmt Via Wireless Interface................. Enable

WLC How to enable webmode (HTTP) or secureweb (HTTPS)

IKEA - LACKRack (DATA RACK)

 

Interesting product by IKEA. I like it ... If your a geek like me and need to make a fashion statement or maybe you are looking for an inexpensive rack solution here it is -- LACKRack. Ill be checking out my local IKEA next week to see what the LACKRack has in store for me...

Looking to build a home data center? Look no further than you local IKEA store. Computer hobbyists are adapting the Swedish furniture chain’s LACK side table to house servers and switches, creating a LACKRack. It turns out that the space between the table’s legs is 19 inches, the same width as a

 standard slot in a data center server rack.

The LACKRack was first displayed at the eth0 Winter 2010 computer conference last weekend in Wieringerwerf, the Netherlands. The eth0 team has posted a guide to building your own unit by using wood screws to affix server rack mounts to the legs of the table. The tables are stackable and modular, so can be assembled in a variety of configurations. 

There’s also the LACKRack “Enterprise Edition,” which uses a longer LACK coffee table – and as  with any enterprise product, has a premium price as a result. The eth0 site suggests that Google engineers may have been the first to affix gear to LACK tables. 

Looking to build a home data center?

Look no further than you local IKEA store. Computer hobbyists are adapting the Swedish furniture chain’s LACK side table to house servers and switches, creating a LACKRack. It turns out that the space between the table’s legs is 19 inches, the same width as a standard slot in a data center server rack.

The LACKRack was first displayed at the eth0 Winter 2010 computer conference last weekend in Wieringerwerf, the Netherlands. The eth0 team has posted a guide to building your own unit by using wood screws to affix server rack mounts to the legs of the table. The tables are stackable and modular, so can be assembled in a variety of configurations.

There’s also the LACKRack “Enterprise Edition,” which uses a longer LACK coffee table – and as  with any enterprise product, has a premium price as a result. The eth0 site suggests that Google engineers may have been the first to affix gear to LACK tables.

Leeched from DataCenter

WLC Change Command Prompt

 

You may already be very familiar with changing the host / prompt name of a Cisco Router or Switch. Config T --> hostname --> abc123

The CLI command in Airespace OS to change the command prompt is ---  Config --> Prompt --> abc123

Example –

(WiSM-slot3-1) >config prompt ?|

<prompt>       Enter system prompt up to 64 case sensitive characters

 

** NOTE ** My WLC is running 6.0.188.0  -- If you “config prompt ?” states “

<prompt>       Enter system prompt up to 64 case sensitive characters.”

HOWEVER if you read the 6.0 Config Guide, page 2-24 states –“ The system prompt can be any alphanumeric string up to 31 characters. You can change it by entering the config prompt command.”

Personally, I don’t think I ever had a switch/router name more then 15 or 18 characters. 

I tested it and you can go up to 64 !

(1111111111111111111111111111111111111111111111111111111111111111) >config prompt 1111111111111111111111111111111111111111111111111111111111111111a

Input is too long!

(1111111111111111111111111111111111111111111111111111111111111111) >config prompt 1111111111111111111111111111111111111111111111111111111111111111

Bugs: CSCtd66943 - WCS 6.0.170.0 Shows Incorrect AP Duplex

 

I wanted to share a recent bug I just encountered with WCS. I’m running WLC code 6.0.188.0 and WCS 6.0.170.0. In WCS if you drill down to the access point and look under CDP neighbor tab the duplex is reported as half-duplex.  I double checked the switch and the access point and it was set to FULL.

 Reportedly this is fixed in the next version of WCS, not yet released. 6.0.178 .0 and 7.0.87.0.

 CSCtd66943 Bug Details

WCS: Reports incorrect duplex mode for CDP neighbor of an AP

Symptom: WCS reports incorrect duplex mode for CDP neighbor of an AP Conditions: WCS - 6.0.170.0 WLC - 6.0.182.0 Workaround: None at this time. Problem Description: The WCS GUI reports incorrect duplex mode for CDP neighbor of an AP. From Monitor --> Access points --> Click on an AP --> Click on the 'CDP neighbors' tab. The duplex mode for the CDP neighbor is reported as 'half-duplex'. Verifying directly on the neighbor's CLI it's configured for full-duplex.