What is "Another clk on Guido configured as primary"

Question

Hi there,
just a short question with this error message.
there is an issue with a 2651XM router, when the first bri(what is on the WIC slot) goes down and try to change the clocking to the next BRI module what is on a NM-HD-2V slot.
The issue happens now, there is many hundreds of error message says "Another clk on Guido configured as primary" and sometimes the router crash, sometimes not.
I like to know what is exactly the Guido (in my understanding this is the SW on the IOS what handle the NM-HD-2V module) and why I can not set the network-clock-select for the bri cards with this router. As per the Command LookupTool it supported since 12.3.11 and I've 12.4 right now. Is this platform can handle network clock selecting with bri's?
thanks in advance!
Gaba

Answer 1

Gaba,
Not 100% sure on this because typically I deploy this with T1/E1. I believe for VWIC BRIs that command cannot be used. Below is a blurb from the network-clock-participate command that goes with the select command.
network-clock-participate
To allow the ports on a specified network module or voice/WAN interface card (VWIC) to use the network clock for timing, use the network-clock-participate command in global configuration mode. To restrict the device to use only its own clock signals, use the no form of this command.
The only VWICs that can participate in network clocking are digital T1/E1 packet voice trunk network modules (NM-HDV), and Fast Ethernet network modules (NM-2W, NM-1FE. and NM-2FE).
As far as the network-clock-select, that might reference WIC based BRI only and not VWIC. The default on that platform is.
Command Default
Cisco 2600 series and Cisco 2600XM
The network clock source is the Advanced Integration Module (AIM) phase-locked loop (PLL) with priority 5, which indicates that the network clock is in free running mode.
Sorry it's not a definite answer to your question but it's how I read it.
Please rate any helpful posts
Thanks
Fred