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…
Read MoreJabber 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…
Read More1. 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…
Read MoreEvery 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…
Read MoreAn 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…
Read MoreMore and more Enterprises come to a decision to deploy Cisco Nexus switches in their corporate data centers. One of the main design considerations relates to Cisco 2200 Fabric Extenders (FEX) connectivity topology. To provide high availability Cisco Nexus 5500 series switches support different options to connect FEXes (all are based on a Virtual Port Channel feature): Straight-Through, where every FEX is connected to a single N5K (Active/Active and Active/Passive servers); Dual-Homed, where each FEX…
Read MoreUnderstanding Cisco Auto Archive Feature to Backup Configuration File Posted by Elvin Arias on Oct 30, 2013 10:16:18 AM One of the most important tasks of a network administrator is to backup the network configuration files of every Cisco device periodically. This periodicity is dictated and established by the organization policies. Frequency could be every week, every fifteen days or every month depending on the needs of the organization. The importance of the configuration files…
Read MoreFirmware Version 10.1(1) for Cisco Desktop Collaboration Experience DX650 The 10.1(1) firmware image within the installation program supports the SIP protocol for the following Cisco Unified Devices: Cisco Desktop Collaboration Experience DX650 This firmware version is supported on Cisco Unified Communications Manager 7.1(5), 8.5(1), 8.6(2) and above. Release Notes and documentation For a list of Resolved Problems and Known Problems with this firmware version, you can obtain the Cisco Desktop Collaboration Experience DX650 Firmware…
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Wireshark Cheet Sheets Download the Wireshark Cheet Sheats# Wireshark_Display_Filters tcpdump
Read MoreDisplayFilters Wireshark uses display filters for general packet filtering while viewing and for its ColoringRules. The basics and the syntax of the display filters are described in the User’s Guide. The master list of display filter protocol fields can be found in the display filter reference. If you need a display filter for a specific protocol, have a look for it at the ProtocolReference. Examples Show only SMTP (port 25) and ICMP traffic: tcp.port eq…
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Introduction Cloud computing services have grown exponentially in