About L.K.

L.K. · 10-14-2020

SymptomsCUCM Cluster with either:Dedicated TFTP nodes (TFTP1 & TFTP2, Primary & Secondary)Only certain nodes within cluster running TFTP services.Requirements to upgrade specific device phone models with new firmware load version.DiagnosisLimit loadi...

L.K. · 01-09-2020

Kindly assist me with the below.When installing a new firmware file on a CUCM cluster should I always install it on the PUB and TFTP subscribers, or can I simply install it on the TFTP subscribers?I will be using the cop install method. Our PUB does ...

L.K. · 11-25-2020

It has to be enabled for the phone. This can be set on the device (phone) level, common phone profile, or enterprise phone configuration sections. Useful link: https://www.cisco.com/c/en/us/support/docs/smb/collaboration-endpoints/cisco-ip-phone-8800...

L.K. · 11-25-2020

Do you have a DRS available?- I do not recall if it will let you, but you may want to try run DRS from a SUB and possibly use that. I have done this process a couple times before, once using the guide, and once with help of Cisco TAC. It worked fine ...

L.K. · 11-25-2020

UC (CUCM/VOIP) over VPN may not be the optimal experience. I've only seen clients use this as a backup/fallback method if primary links (MPLS, Fiber, OC3, etc...) go down. Depending on the size of the site you may run into quality/registration issues...

L.K. · 10-14-2020

Recently have been seeing a similar scenario. Phone randomly flood DHCP server with requests, almost like DDOS, while already configured and assigned an IP. Phone continues to function and does not lose registration. Multiple models and firmware load...

L.K. · 10-14-2020

Experiencing similar issues recently. Multitude of phone models, 7842, 8861, etc......Besides firmware update, what was the solution for some that have experienced this?

Member Since	‎01-09-2020 05:29 AM
Date Last Visited	‎05-23-2021 05:02 PM
Posts	12
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CUCM Upgrading Device Load (Phone Firmware) on TFTP Nodes Only

Upgrading Phone Firmware: Is Install on PUB Required vs Only Nodes Running TFTP?

Re: 8861 Bluetooth

Re: Restore Publisher from subscriber

Re: CUCM over VPN

Re: cisco phone sending multiple dhcp request

Re: Cisco 7937 and DHCP Check-in