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Cisco 6807 Packet Per Second Calculation

Hi,

 

I have customer requested for a core switch which is capable of supporting 5 billion packets per second, hence we proposed Cisco Nexus 7K series switches. Later on we are forced to propose Cisco 6807 series due to budget constraints. Now the customer is looking for the packet per second calculation to justify the proposed 6807 series will not be oversubscribed.

 

Below is the scenario

 

Total No of access switches  - 34 x C9300-48-P-A

Each access switch shall connect to core switch using 2 x 10 Gig uplink

 

Core Sw

 

Core switch model - 2 x C6807-XL

Sup - 1 x  VS-S2T-10Gig

Line Card – 2 x C6800-32P10G

 

Cisco documents says that the throughput for the line card is 120 MPPS, we made below calculation

 

S.No

No of
Access Switches

No of
Uplink

Total Access switch Bandwidth
(Gbps)

Total Access switch Bandwidth in bits per second

 Bits to Byte Conversion
8 bits = 1 bytes per second

 Frame Size

 PPS
Total bytes / MTU

 MPPS
Total bytes / MTU

1

18

18

180

180,000,000,000

22,500,000,000

84

267,857,142.9

267.9

2

16

16

160

160,000,000,000

20,000,000,000

84

238,095,238.1

238.1

 

Are we oversubscribed here???Kindly clarify.

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