Cisco 2960-48TC - Catalyst Switch Supplementary Manual
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© 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 2 Introduction Why is network power consumption important? How can we measure it? How much power do Ethernet switches consume?
Cisco 2960-48TC - Catalyst Switch, © 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 3 Network Power Consumption Customers calculating total cost of ownership need to factor in power consumption. Likewise, power consumption contributes to a company’s carbon footprint. Miercom was commissioned by Cisco to measure power consumption in Ethernet switches Power Consumption Examples 33 watts is the power consumed by a ceiling fan at average speed. 60 watts is the power required to light an incandescent bulb. 80 watts is the power consumed by an average PC.
Cisco 2960-48TC - Catalyst Switch, © 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 4 Miercom Measures Power Consumption Cisco ® Catalyst 2960 48TC-L Cisco Catalyst 2960G-48-TC-L Cisco Catalyst-3750G-48PS Nortel BayStack 5510-48T HP ProCurve 2650 Cisco Catalyst 3560E-48PD Cisco Catalyst-3750E-48PD-F 3Com 5500G-E HP ProCurve 3500yl-48G Device Under Test 5% and 100% throughput traffic generated Frame size sequence: 64, 128, 256, 512, 1024, 1280, and 1518 bytes Layer 2 and Layer 3 tested 1GE and 10GE tested KillAWatt is u measure the power consumption for each device under test. Traffic Generator sed to KillAWatt
Cisco 2960-48TC - Catalyst Switch, © 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 5 Results: 100% Throughput Power Consumption at 100% 37 56 122 129 142 143 161 205 212 Fast Ethernet GE, no PoE Up to 10 Gig + PoE HP ProCurve 2650 Cisco 2960G Nortel Baystack 5510 Cisco 3560-E Cisco 3750E Cisco 3750-G 3Com 5500 G-E ProCurve 3500yl Cisco ® 2960
Cisco 2960-48TC - Catalyst Switch, © 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 6 Results: Layer 2 Switches Power Consumption of Layer 2 switches at 100% 0 20 40 60 80 100 120 140 Cisco WS-C2960 HP Procurve 2650 Cisco WS-C2960G Supports Gigabit Ethernet The Cisco ® WS-C2960G supports Gigabit Ethernet. The other switches support only Fast Ethernet, which results in increased power consumption.
Cisco 2960-48TC - Catalyst Switch, © 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 7 Results: Layer 3 Switches Power Consumption of Layer 3 switches at 100% 0 50 100 150 200 250 Nortel Baystack 5510 Cisco ® 3560-E Cisco 3750ECisco 3750-G 3Com 5500G-E HP3500yl Supports Gig E 10/100/1000. Stackable Supports up to 10 Gig - Stackable Supports up to 10 Gig - Fixed
Cisco 2960-48TC - Catalyst Switch, © 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 8 Results: Layer 3 for Cisco, HP, and 3COM Layer 3: Cisco ® 3750-E vs. HP 3500yl vs. 3Com 5500GE Cisco3750ECuUplinks100% Cisco3750EFiberUplinks100% Cisco3750E2x10GBUplinks100% HP3500yl‐48Cuuplinks100% HP3500ylfiberuplinks100% HP3500yl2x10GBUplinks100% 3Com5500G‐ECuUplinks100% 3Com5500G‐EFiberUplinks100% 140 160 180 200 220 240 Power Consumption (Watts) Cisco ® switches consume 33% less power than 3Com and HP switches 3C
Cisco 2960-48TC - Catalyst Switch, © 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 9 Results: “E Series” Improvements Layer 3: Cisco ® 3750-E vs. 3750-G Series 170 Cisco 3750-E Cu Uplinks 100% 165 130 135 140 145 150 155 160 Power Consumption (Watts) Cisco 3750-E 2x10G Uplinks 100% Cisco 3750-G Fiber Uplinks 100% Cisco 3750-E Fiber Uplinks 100% 125 Cisco 3750-G Cu Uplinks 100% 120 64 128 256 512 1024 1280 1518 Packet Size (Bytes)
© 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 10 Observation Financial Saving Power per switch 212 W Power in a 3-switch rack 636 W Heat dissipated in BTU (1 W = 3.41 BTU) 2168.76 BTU Power consumed in cooling 1 BTU 0.105 W Power consumed for cooling 227.71 W Total power consumed by switch 863.71 W Cost per Kwh 10 cents Cost per day $2.07
Cisco 2960-48TC - Catalyst Switch, © 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicC97-404-735-00 11 More use for energy expense Run a PC and a 3750E at the cost of a HP 3500yl ! Environmental Benefits Reduce your Co2 emission by 55 ton. Decrease your carbon footprint Observation Continued Financial Saving…
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