[Asterisk-Users] QoS General Question

[Michiel van Baak]

On 14:35, Tue 09 Aug 05, Geoff Manning wrote:
> Julio Arruda wrote:
> > Half duplex by itself doesn't hurt (depends in number of calls and etc
> > really, but anyway...)
> > What is a killer for VOIP is duplex mismatch.
> > If you have autonegotiation enabled, and your peer (the switch ?) has
> > autoneg off, and 100/Full-duplex hard coded, you WILL have a duplex
> > mismatch.
> > And this is as per the spec
> > 
> 
> We'll have only about 5 or 6 concurrent ulaw/alaw calls. And the server is
> on the LAN with all the other workstations.
> 
> Here is my output of ifconfig where you can see alot of collisions.
> 
> eth0      Link encap:Ethernet  HWaddr 00:13:20:17:DA:84
>           inet addr:172.16.64.15  Bcast:172.16.255.255  Mask:255.255.240.0
>           inet6 addr: fe80::213:20ff:fe17:da84/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:45521263 errors:0 dropped:0 overruns:0 frame:247
>           TX packets:46135708 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:70538 txqueuelen:1000
>           RX bytes:1261961045 (1.1 GiB)  TX bytes:1711703099 (1.5 GiB)
>           Interrupt:177
> 
We had the same, till we replaced the switch with a new
Cisco 2950. Now we have no collisions nor errors after 300
days of uptime. 
Check the cables, switch and NIC.

Michiel