Re: 6509 switch ethernet blade port population vs efficiency
Is there a general rule of thumb on how a switch ethernet blade should be populated in relation to getting the best performance per asic/port combination?
If I have a four 10/100 ethernet blades on a 6509 and there are 12 ports per asic on each blade, 140 users, 20 servers and 32 printers.
Would it make any difference how I populate the blades in how efficient the usage/utilization of each port/asic/blade is?
Does it matter if I populate three blades with all workstations and one blade with printers and servers?
Or should there be a printer (low utilization) in each asic/port group?
Should there be an attempt to try and balance the load on each asic/port group?
Are there any guidlines for this type of application?
Firstly, performance aside, it is not a good idea to populate one module with all the servers/printers because if that one module fails then so on effect does your network. Your servers may be dual honed so that may not be so important but i would definitely spread the printers among the worksation modules just so in the event of a module failure there are at least some printers available.
How you populate the blade depends on how much throughput you need and how much throughput the blade provides eg.
WS-X6548-GE-TX with a Sup720 or Sup2 + SFM (Switch fabric Module) = 8Gbps connection to the switch fabric
WS-X6748-GE-TX with a Sup720 = 40Gbps connection to the switch fabric
Each of the above blades has 48 10/100/1000 ethernet ports but they clearly have very different oversubscription rates ie. the 6548 will support 8 devices running at 1Gbps before becoming oversubscribed and the 6748 40 devices.
So it's more a question of the blade capability than the port groups although you should be aware of the port groups and try to spread the load across the ASICs.
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