I need to design the network for a campus having around 20 different location/buildings and these connect to the centralized data center where 6513 switches are working in VSS with 2T supervisor engine.
Access switches considered as 2960 and its a POE+ to support IP telephony and CCTV.
At distribution we are planning to use 3750 or 4500 depending on the load of the systems.i
Single mode fiber is used between distribution to core and L2 link between Access and Distribution is multimode and makes etherchannel of two redundant links
I need to calculate the load on the core switch when all the systems are active (Data,IP telephony,IPTV, CCTV,BMS)
Need some documents for bandwidth calculation based on the users of different systems and load on the core and distribution switch by considering trunk links as single and ether channel.
Lets say for example 1000 user for Data and 500 for IP telephony and 400 for other systems
(IPTV,CCTV,BMS). How the load calculation will be done on the distribution and core switch so that the network will not break down.
i dont have any answers regarding your question, but perhaps i want to share my experience.
in designing network, capacity planning is quite difficult, so normally we make design based on some assumptions, which those statistic numbers belongs to. so in the early page of my design proposal/presentation slide, i always write this assumptions.
but after it becomes production network, some variables are changing, for example the user behavior. how the user use their network defines the traffic characteristic.
and some times those assumptions that we made are wrong, then everybody blame the design or the designer
but for me, i always say to my self that there is no so called wrong design, its just that we fail to make some assumptions. and these assumptions should be made by the designer and the user.
We are using VSS with 2T supervisor engine and each distribution switch has redundant link form core and its combined as MEC( multi chasis etherchannel)
I calculated the Bandwidth for all systems as per this calculation in mega bits.
IPTV IPT IPVS Internet
20mb 0.25mb 10mb 2mb
lets say 48 port switch has 10 connections from each systems then total load on the access switch is 345 mb and 3750G-12S has the Bandwidth aggregation up to 16 Gbps through 10 Gigabit EtherChannel technology, 8 Gbps through Gigabit EtherChannel technology.
If i consider the 1 GB link between access and distribution then bandwidth aggregation is 8 gbps and it can support around 20 access switches (2960 48 ports POE+)
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