[Asterisk-Users] QoS General Question

[Julio Arruda]

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

Geoff Manning wrote:

>Eric Wieling aka ManxPower wrote:
>
>  
>
>>In my experience, for local LAN audio issues, duplex problems are the
>>problem, not LAN traffic.
>>
>>    
>>
>
>Rock on!
>
>I am in half duplex mode:
>
>serv01:~# ethtool eth0
>Settings for eth0:
>        Supported ports: [ MII ]
>        Supported link modes:   10baseT/Half 10baseT/Full
>                                100baseT/Half 100baseT/Full
>                                1000baseT/Half 1000baseT/Full
>        Supports auto-negotiation: Yes
>        Advertised link modes:  10baseT/Half 10baseT/Full
>                                100baseT/Half 100baseT/Full
>                                1000baseT/Half 1000baseT/Full
>        Advertised auto-negotiation: Yes
>        Speed: 100Mb/s
>        Duplex: Half
>        Port: Twisted Pair
>        PHYAD: 1
>        Transceiver: internal
>        Auto-negotiation: on
>        Supports Wake-on: g
>        Wake-on: d
>        Current message level: 0x000000ff (255)
>        Link detected: yes
>
>This could help solve a lot of quality issues.
>
>  
>