Oversubscribed.... Yes... Likelyhood of it causing an
issue... Near none.... I doubt that you will see the
day that your network produces that much bandwidth to
cause this to happen... Also remember that half your
network sits on one switch (65) and the rest on the
other... so even if you were fully used up, nearly
half your traffic would be on the same 65 (which has a
32gbps back-plane) Put some SNMP monitors on your LAN
and you'll probably see that 95% of the time none of
the interfaces are over 10mbps.
Moe.
--- ciscosis <[EMAIL PROTECTED]> wrote:
> Hello all,
>
> Can anyone advise/help with this?
>
> Recently we installed a switched network using the
> Cisco collapsed core
> model.
> Our core/distribution switches are 2 cat 6506's
> connected to each other
> via a gbit etherchannel providing 2 gbits of
> bandwidth between the core
> switches.
> Our trunk links from the core are fast etherchannel
> cat 5 providing 200 mbts
> of bandwidth to each access switch.
> We have 5x cat 5500's providing access points into
> the network for our end
> stations. Each access switch has approximately 50
> end stations connected and
> each end station has a full duplex 100mbits switched
> connection.
>
> My maths is petty shaky but does this not mean that
> each trunk link from
> each access switch should ideally be capable of
> providing 50x100mbits 3D
> 5Gbits - 20% for the 20/80 rule 4GBits of
> bandwidth?
> which, If I am correct means our trunk links are
> hugely over subscribed!!
>
> Show proc returns an average CPU utilization on the
> access switches of give
> or take 8%
> The cores show approx 2%
> Show traffic returns very low peak traffic stats
> (all switches less than
> 8%)
> response times are very good.
>
> now for the question .... should I be concerned? If
> my maths is correct why
> such low traffic/CPU stats, is there a command on
> the switches to see how
> much bandwidth is being used on the trunks?
>
> TVMIA
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> _________________________________
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>
>
> _________________________________
> FAQ, list archives, and subscription info:
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=====
_____________________________________________
Moe Tavakoli
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