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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