Cripes !!!
Thanx for the reply.
So it looks like we have potential "Spanking Tree"
problems ahead. We are already rolling with Cat
6000/3500 into our new sites, so any old kit goes in
would mean that "spanking Tree" would not be
calculated correctly and could go "Loop the Loop".
Phil.
--- Edward Solomon <[EMAIL PROTECTED]> wrote: > The
costs have recently been altered. This is
> reflected in the Cisco
> Catalyst switch IOS (except the 1900 series).
>
> Link Speed Cost (reratified IEEE spec) Cost
> (previous IEEE spec)
>
-----------------------------------------------------------------------
> 10 Gbps 2 1
> 1 Gbps 4 1
> 100 Mbps 19 10
> 10 Mbps 100 100
>
>
> --
>
> Edward Solomon
> CCNA, CCSI
> Senior I/T Specialist
> Networking Solutions
> IBM Canada Ltd. - Learning Services
> Tel.: (905) 316-3241 Fax: (905) 316-3101
> E-mail: [EMAIL PROTECTED]
> Internet:
>
http://www.can.ibm.com/services/learning/net_internet.html
>
> "Phil Barker" <[EMAIL PROTECTED]> wrote in
> message
>
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Hi,
> > Just happened on this studying for CIT.
> >
> > Looking at how Root bridges calculate their
> respective
> > costs using 10^9/Bandwidth.
> > If the BW = 100Mbit/s then the cost = 10 i.e
> > 10^9/100*10^6 = 10.
> >
> > Presumably if using a Gigabit link to root then
> the
> > cost would be 1.
> >
> > My question is what will happen when Terrabit
> comes on
> > board ? if this answer is < 1. Will the output be
> in
> > floating point notation or will it be rounded to
> the
> > nearest integer ?
> >
> > A cost of root of 0 and a cost to root of 0 could
> be
> > confusing.
> >
> > Can anyone with a lab do a test with an E1/T1 link
> to
> > verify the output ? I would myself but i'm 130
> miles
> > away from my lab.
> >
> > I get E1 = 488.28125 on paper.
> > and T1 = 647.6684 for T1
> >
> > Does the output just show as integer or as a float
> ?
> >
> > Phil.
> >
> >
> >
> >
>
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