[AusNOG] Cable length limits?

[John Lindsay]

The length limits are to ensure a collision is detected on a half duplex network if two distant nodes send the smallest allowed packet at exactly the same time. 

When you have a full duplex switched network (no coax, repeaters or hubs) the lengths are no longer critical. Then it's down to the electrical characteristics of the cable and getting the bits from TX to RX reliably. 

John Lindsay

> On 5 Mar 2014, at 8:51 am, "Beeson, Ayden" <ABeeson at csu.edu.au> wrote:
> 
> IIRC the standard maximum channel length is 100m, but they allow for up to 5m patch leads on each end, hence the 90m permanent link limit.
>  
> Thanks,
> Ayden Beeson
>  
> From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of David Beveridge
> Sent: Wednesday, 5 March 2014 9:12 AM
> To: Steve Smalley
> Cc: ausnog at lists.ausnog.net
> Subject: Re: [AusNOG] Cable length limits?
>  
>  
>  
> 
> On Tue, Mar 4, 2014 at 9:37 PM, Steve Smalley <SSmalley at trimblenetworks.com.au> wrote:
> Back when I was learning the ropes I recall being told something similar... 100m limit for cat5 (I don't think c5e was around at the time).  And due to this I tend to stick to it but can't for the sake of me remember exactly who what where when or why.
> 
> Hmm, My recollection is 300ft, which works out to just 91.44 meters. 
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