How to troubleshoot bad IP connectivity 2

[nialaman]

I have a G3si R12 with communication manager 3.0. We recently added a new building to the PBX. It now supports 75 IP phones. We currently have 1 c-lan and 1 medpro dedicated for the 75 IP phones. The IP phones are on their own network, separate from the data.

I have received complaints from users who claim that phones would suddenly reboot, the voice quality would go bad ... I looked into vmon and saw lots of packets loses, excessive delay ...

Both C-lan and Medpro are set for auto sync ... is this setting right? Should it be set for 100 Full instead? Can you think of any problems I can take a look @?

 

[Rod25]

Hi,
You have two issues...why are phones rebooting? and voice quality issues. I would fixed the Medpro and Clan to 100m Full. Make a call to an IP phone and do a 'list trace station xxxx', look out for packet loss or jitter.
Is 802.1q enabled on phone?
Ensure that the VLAN TEST = 0
Are your LAN switches configured for QOS

I would try to find out why those phones are rebooting.

 

[phoneguy55]

Not only set your clan and medpro to 100 full, but also set your lan switch to 100 full. They must match, if they don't wierd crap can happen. Also, make sure you are running the latest firmware on your IP interfaces.

 

[nialaman]

Thank you so much guys! I will make the changes you suggested. I will let you know how it goes.

 

[nialaman]

I changed both MedPro and C-LAN to 100 Full ... I have yet to experience the problem I was having.

Thank you

 

[phoneguy55]

Also make sure that the LAN switch ports that your clan and medpro connect to are forced to 100 full. If the are set to auto you will have problems becuase of the mismatch.

They must be the same on both sides

 

[schned99]

In addition to locking to 100/full on the IP boards and data switch ports, make sure you turn off portfast on the data switch ports as well. The IP phones are probably rebooting becuase they loose network connectivity. In addition to updating the firmware on your CLANs and MEDPROs, you should look into updating the firmware on the phones. At 75 phones you probably won't have a problem, but be aware that a single TN2302AP MEDPRO will only support 64 simultanious channels. As long as you don't have G700 or G350 Media Gateways and your not using IP Trunking, this would only become a problem if 64 of your IP phone users decided to make a call.

Statements expressed in this post are my own opinions and should not be considered as the opinion of my employer.

 

[nialaman]

Thank you so much! I appreciate all the help!