11-29-2010 01:48 AM - edited 03-16-2019 02:09 AM
Hello,
I remarked some strange behaviour with packet drops between 2 ip phones.
Those phones (cisco 6941) are connected on the same switch and have no problems but on the switch I see Hic up in Jiiter & lost/drop packects” every 3 minutes in communication.
I suppose this is default behavior ?
How to explain ?
Kind regards,
Kurt
11-29-2010 04:25 AM
What model switch? How are you seeing the lost packets?
11-29-2010 04:51 AM
Hello Jonathan,
I see it on the phone parameters itself. No dropped packets on the switches.
receiver lost packets: every 3 minutes 2 packets.
Kind regards,
Kurt
11-29-2010 05:00 AM
Kurt,
is there an actual issue as a result of these packets? does it actually effect your calls (quality of RTP stream?).
I know I am not actually answering your question, but if there is no effect, I wouldnt worry about it.
Unless you want to set up like wireshark or ethereal to get a more indepth view on what packets are being dropped and where they are coming from.
R.,
11-29-2010 05:06 AM
Thx for the update.
No impact on the calls but it's a large customer (17000 phones) and they are complaining sometimes about the voice quality. And they want every bit to be explained....:-)
11-29-2010 10:22 AM
Same issue happens for same codec?
G722
G711
G729
Any QoS configured?
If you swap switch port same issue?
Other model connected to same switch show same behavior?
Thanks
12-01-2010 03:08 AM
Hi,
It's for all the phones (also on different switches).
Also with a different type of phone.
Codec is always G711 on LAN
Kurt
03-22-2011 05:17 AM
We have exactly the same problem, where every 3minutes (and we're talking exactly) we lose RTSP packets and users get 2secs of silence.
The routers all report no lost data, and we're stumped!
Our CoLo provider recently toggled speed negotiation and duplex from auto to fixed and back, and the problem seemed to clear for a few days, now it's back.
Does anyone know of any processes that occur every 3minutes in Cisco kit?
Our two devices at a 3020 switch and an 1801 used as a firewall (not using ADSL, just FA0<->VLAN1).
Cheers,
Jason
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide