[Asterisk-Users] re hardware requirement - asterisk

[Sean Cheesman]

well, it does say SIMPLEX in the fxp0 flags section.  I don't honestly
know if this means it's negotiated half duplex, or something beyond
that....  10baseT is capable of running full duplex, although this
requires a NIC capable of is, as well as a switch that can do FD.  And
regarding the 1% comment, the benefit with full duplex comes in to play
with collisions, not so much traffic amounts.

-----Original Message-----
From: Chris Albertson [mailto:chrisalbertson90278 at yahoo.com] 
Sent: Thursday, January 15, 2004 12:40 PM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] re hardware requirement - asterisk



--- "dkwok at iware.com.au" <dkwok at iware.com.au> wrote:
> I have just checked the Openbsd box on the if interface.
> 
> 
> fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>          address: 00:02:55:30:54:28
>          media: Ethernet autoselect (100baseTX full-duplex)
>          status: active
>          inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
>          inet6 fe80::202:55ff:fe30:5428%fxp0 prefixlen 64 scopeid 0x1
> xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>          address: 00:01:02:78:11:e8
>          media: Ethernet autoselect (10baseT)
>          status: active
>          inet 203.219.167.126 netmask 0xfffffffc broadcast 
> 203.219.167.127
>          inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2
> 
> For fxp0, the internal interface although the nic can do full-duplex 
> it seems to me that it is only running simplex!!

Why do you think it is running simplex.  I read the above and see where
it says "(100baseTX full-duplex)"

I don't think 10BaseT can run full duplex.  I could be wrong but I don't
think so.

But why does it matter?  A single VOIP connection will not even use 1%
of a simplex 10BaseT.  Simplex 100BaseT should be able to handle dozens
and dozens of calls



> Same for xl0, the external interface. It is running 10BaseT but again 
> it is simplex.
> 
> Does that affect my voip performance? Is it true that every step of 
> the way the network has to be full-duplex?
> 
> David Kwok
> 

=====
Chris Albertson
  Home:   310-376-1029  chrisalbertson90278 at yahoo.com
  Cell:   310-990-7550
  Office: 310-336-5189  Christopher.J.Albertson at aero.org
  KG6OMK

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