Tag Archives: Cisco

ESXi Host Hardware System Board Status on Cisco UCS

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After running the Cisco UCS servers for a period of time, their System Event Log can begin fill up and present as a very generic error within ESXi. This occurred on four ESXi servers that were upgraded approximately the same time. While the logging will continue, it is quite a nuisance to view within vCenter. Even more so with the lack of flash to HTML5 support on the older UCS CIMC modules, like the ones running this blog. Thanks to CLI access, it can still be remediated.

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Signing a Certificate in Cisco IOS for CUBE with TLS + SRTP

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With the drive of unified communications to cloud based connectivity, a Session Border Controller (SBC) can play an important part in supporting a migration from premise equipment.  Some gateway manufactures provide a convenient Graphical User Interface (GUI), others still focus on leveraging a command line interface (CLI).  This overview will step through the generation and signing of the certificates that would be used for Tranport Layer Security (TLS) for both signaling and media within a Cisco Unified Border Element (CUBE).

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Collaboration’s Transformation

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I recently was having a discussion with a peer around Collaboration, the Spark to Webex updates, and how it has changed overtime.  A bit of reminiscence from previous versions of the Collaboration strategies and the direction they are going prompted me to create this entry.  Lets take a look at Collaboration’s past, present, and future and assess how your organization has adopted.

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Cisco and Microsoft UC Integration: Part 1 – Intradomain Federation Messaging

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Working through many conversations with customers has lead to example the steps required to complete some Microsoft and Cisco integrations within the Unified Communications (UC) space.  For the scope of this exercise, the Skype for Business and Jabber endpoints using the same domain will be enabled for direct messaging only communication.  This is the first post in an intended mini-series referencing the integration as well as user experiences.

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Cisco Push Notifications for iOS and Jabber

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With the recent release of Cisco UC products, an additional feature has been delivered.  Jabber messages, both internal and Mobile and Remote Access (MRA) connected, can now be delivered through Apples cloud-based Push Notification Service.  While this may not peak everyones interest, it is a prelude to enabling the same functionality for other communication channels.

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Upgrade to Expressway 8.8.1 Breaks MRA

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After completing an upgrade to Expressway 8.8.1, it was noticed that Mobile and Remote Access (MRA) suddenly stopped working.  After some searching and log files, it was found to be a DNS PTR record issue.  The  implemented “feature” that required the Expressway-E DNS PTR resolution had only been implemented as a requirement in version 8.8.1.

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Cisco CUCM DRS Backup Failure with OpenSSH

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With the release of OpenSSH v6.7, weaker ciphers have been disabled.  Cisco CUCM has not updated the weaker ciphers used within CUCM as of v11.  This causes issues with backups to the OpenSSH versions in the latest distributions.  This post walks through the identification of the issue and the correction used in the CollabBackups appliance.

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Cisco Unified Communications Licensing Install and Rehost

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I currently have some UC 10.x and 11.x licensing that is purchased and used for demonstrations.  With the recent purchase of the 11.x licenses, a Prime License Manager (PLM) server was stood up to manage the multiple clusters using multiple versions of the CUCM platform. This post walks through the process of standing up a stand-alone PLM server, pulling licenses from the Cisco licensing website, and the rehosting of licenses from a legacy license manager.

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