CAPWAP Controller Discovery Process

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CAPWAP Controller Discovery Process In a controller-based architecture, CAPWAP access points are dependent on a wireless controller to provide the software image, configuration, and centralized control and optionally data forwarding functions. Therefore, it is necessary for the access point to find a list of available controllers with which it can associate.   The following layer 3 CAPWAP discovery options are supported: Broadcast on the local subnet Local NVRAM list of the previously joined controller, previous…

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WLC Discovery via Broadcast

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WLC Discovery via Broadcast original link # http://mrncciew.com/2013/05/04/wlc-discovery-via-broadcast/ As outlined in one of my previous post (AP Registration) there are multiple methods (Broadcast, Static configs, DHCP option 43, DNS) available for a Ligthweight Access Point (LAP) to discover a WLC. In this post we will see how broadcast mechanism can be used for this. After the LAP gets an IP address from the DHCP server, the LAP broadcasts a Layer 3 CAPWAP discovery message on to…

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Cisco Nexus 1000v In Less Than 10 Minutes

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original Post #  http://kendrickcoleman.com/index.php/Tech-Blog/standing-up-the-cisco-nexus-1000v-in-less-than-10-minutes.html A few weeks ago at geek week, I was assigned the task of getting the Cisco Nexus 1000v distributed virtual switch set up. I probably spent a good 4 hours on my first cluster because I had no clue what was going on and I ended up losing my management network and spent lots of time restoring my network to the original vSwitch. I followed TrainSignal’s 1000v Installation training in Pro…

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Cisco Nexus 1000v switch – Part 1

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This 3 part tutorial guide will show you how to install the Cisco Nexus 1000v switch. I’m will be using this image for the install – Nexus1000v.4.2.1.SV1.4.zip which can be downloaded from the Cisco website. The lab setup is as follows: 1 x ESX 4.1, 1 x ESXi 4.1, vCenter Server and Domain Controller. This Cisco Nexus 1000v requires 3 mandatory virtual machine port groups to be setup in vCenter before installing. Control, Packet and…

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Cisco Nexus 1000v Switch Part 2

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  Cisco Nexus 1000v Switch Part 2 1. Now that you have your Cisco Nexus 1000v virtual machine installed, go ahead and power it up. Once it’s powered up, from your management station, open your web browser and browse to the management ip address of your Nexus 1000v that you set in part 1. 2. Click on Launch Installer Application. As a side note, this management station must have Java installed to run the application…

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Cisco Nexus 1000v installation – Part 3

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This is part 3 of the Cisco Nexus 1000v installation tutorials.  1. Let’s log into the Nexus 1000v console and type show module. Here you can see that the Virtual Supervisor Module is active and that the ip address is 192.168.1.80. 2. The first thing we need to do is configure our vlans. 3. Now we need to create a port-profile. This port profile is of type ethernet which means that it is assigned to…

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Cisco Jabber SRND – Notes

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Jabber Desktop Clients – Call Control Cisco Jabber Desktop Clients can operate in one of two modes for call control: Softphone Mode — Using audio and video on a computer When a Jabber Desktop Client is in softphone mode, it is directly registered to Unified CM as a SIP endpoint for audio and video call control functionality, and it is configured on Unified CM as device type Client Services Framework. Deskphone Control Mode — Using…

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Cisco Presence SRND 9 – Notes

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1. The SIP connection between the Cisco IM and Presence Service and Unified CM handles all the phone state presence information exchange. a. Unified CM configuration requires the Cisco IM and Presence Services to be added as application servers on Unified CM and also requires a SIP trunk pointing to the Cisco IM and Presence Service. The address configured on the SIP trunk could be a Domain Name System (DNS) server (SRV) fully qualified domain…

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Distributing Cisco Phone Firmware Options [ Peer File Sharing ]

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  Every once in a while I get asked if there is a better way to distribute firmware to phones across the WAN. The obvious driver is the general performance (or lack thereof) for the standard TFTP approach when handling a large number of requests. This is one of those questions that usually comes up the day before a mass firmware upgrade and then goes to the back burner, only to come up again during the next…

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A correct way to shutdown Cisco Autonomous AP

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An interesting fact – powered over Ethernet autonomous Cisco access point continue to associate clients even if you shutdown the relevant switch port! I recently shutdown the switch port to which a spare access point has been connected, assuming it will stop providing PoE. Few days later my friend’s IT specialist reported their customers have connectivity problems when they approach that particular access point. He also asked if the blue light reflects a working condition. That…

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