BCM 1000 VOIP & PEC CARDS

[TWISTEDAPP]

I have a BCM 1000 running 3 voip sets and 2 IP trunks (soon to go to 4). The problem that I'm having is that the IT guy says that the BCM is flooding his network and he loses the internet connection? He unplugs the BCM and his connection is restored, however, when gets on site he says the led for that port on the switch is blinking solidly? I've never had any problems before like this? Any ideas or directions to check? Thanks!

 

[biv343]

Could be a bad NIC, duplicate IP address, or any number of things.

A packet sniffer like Ethereal in line with the BCM will help identify exactly what is happening.

 

[TWISTEDAPP]

Could it be that there is only 4 PEC I cards instead of 2 PEC III cards?

 

[MagnaRGP]

Shouldn't make a difference.

VoIP traffic consists of LOTS of small packets versus data traffic's large packets. I would suspect that the network is incapable of handling the flow.

What type of equipment (make and model)is in place? I'd bet there is a hub involved. That would explain why he loses his connection. A hub can't handle that type of traffic and will begin to cause collisions at about 30% utilization.

 

[TWISTEDAPP]

I'll check later today on the equipment, but I know it's not a hub. He has switches with VPN tunnels between branches & IP sets. What implications do the PEC cards have? The documentation usually spec's PEC III's for anything above 2.5 so although it works, I thought it might be satisfactory for smaller office situations with light voice mail and maybe one IP?

 

[MagnaRGP]

PECs are the hardware that contain the DSP resources. PEC IIIs have more resources in them than PEC Is. If a PEC was bad, it would impact your VM/AA as well.

Get a list of ALL devices between the BCM and the internet gateway.