Configuring STP interoperability between Dell and Cisco Switches
Consider the following network diagram: – Dell OS10 Cores in VLT mode. – Cisco Switches running IOS-V…
Cisco
Configuring Cisco Unity Connection OAuth2 for Office 365 Integration
Microsoft have recently deprecated basic authentication in Exchange Online (Office 365) and in doing so require all…
How To Stack a Cisco 3850/9300 Catalyst Switch
OK long time no post. That’s my bad. I have been busy rolling out Cisco Catalyst switching…
Troubleshooting SIP/2.0 488 Not Acceptable Media
Last week I had an interesting issue with one of our SIP Voice circuits. Calls to a…
Migrating Cisco IP Phones Between CUCM Clusters
I’m currently in the midst of migrating two old CUCM clusters (8.6.x, 9.1.x) to a new 12.5…
How to Configure a Cisco Call Manager Inter Cluster Trunk
Im currently assigned a project merging two old CUCM clusters (8.x and 9.x) into a new 12.5.x…
Configuring Cisco Unity Connection with Office 365
Happy New Year everyone! I’ve had a nice break from work and the blog over the holidays…
Troublshooting %VOICE_IEC-3-GW: SIP: Internal Error (1xx wait timeout): IEC=1.1.129.7.65.0
So this one was a doozy! I get a call from helpdesk advising me that some voip…
Setting up a Linux Network Probe with Cisco RSPAN
In this tutorial I will go over the steps to setup an Ubuntu network probe hosted on…
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