Turning off MAC address learning on a switch will turn it into a "hub" without the interface collisions.
-----Original Message----- From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Carlos Alvarez Sent: Tuesday, June 17, 2014 3:55 PM To: VoiceOps (voiceops at voiceops.org) Subject: Re: [VoiceOps] Adtran Help
We have a standard "kit" that goes to sites when there are issues. It has a hub (real hub, not switch), a cheap manageable switch with a spanned port, and a Linux netbook with packet capture set up on it. This lets anyone with even marginal tech knowledge install it easily and start capturing.
The hub is problematic for voice quality, obviously, but can be useful to see broken network packets and junk that a switch may not pass. We once found a network segment that was flooded with some kind of non-standard packets from a SCADA type device which weren't being passed through the switch.
On Tue, Jun 17, 2014 at 1:46 PM, Gavin Henry <ghenry at suretec.co.uk> wrote:
On 17 June 2014 21:16, Carlos Alvarez <caalvarez at gmail.com> wrote:
Our methodology for packet captures is to put an independent machine on a spanned port and capture on that. Then it doesn't matter what the devices are doing, you get a true network picture.
Same here or agents on the systems pushing SIP captures to a Homer instance.
-- Kind Regards,
Gavin Henry.
Do you know we have our own VoIP provider called SureVoIP? See http://www.surevoip.co.uk
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