Unanswered Question
Nov 26th, 2007
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Welcome to the Cisco Networking Professionals Ask the Expert conversation. This is an opportunity to get an update on the 4500-E Switch with Cisco experts Sam Lim and Laleh Masnavi. Laleh Masnavi is a technical marketing engineer in the Gigabit Systems Business Unit of Cisco. She is currently leading the Early Field Trial program on the Cisco Catalyst 4500 Series product line and is responsible for increasing productivity and enabling best-in-class marketing processes and practices. She is responsible for the enterprise and commercial marketing segments, with her main focus on security. Previously, Laleh was a customer support engineer in the Enhanced Technical Assistance Center and High Touch Technical Support group. There she was a focal engineer for various accounts, including Microsoft MSN, T-Mobile, and USAA. She led the customer support efforts mainly for LAN switching as well as routing. Sam Lim is a technical marketing engineer with Cisco's Gigabit Switching Business Unit. In addition to having overall responsibility for the system-level solution definition and outbound technical marketing for all Gigabit switching products, Sam leads technical marketing efforts for the data center market. Previously he was with the Optical Transport Business Unit working as an engineer and as a technical marketing engineer.

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Overall Rating: 3.4 (12 ratings)
steve0miller Mon, 11/26/2007 - 11:53
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What is the minumum wattage power supplies you would need in order to support 15.4W simultaneously on every port in a fully loaded chassis?


samlim Tue, 11/27/2007 - 18:09
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Hi Steve,

To get a fully loaded 10 slot chassis to support POE, you need to use the 1400W DC-P power supply with an external DC power source.



andrew.burns Tue, 11/27/2007 - 05:15
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Regarding QoS on the 4500-E, what would you say are the main differences between the new platform and the old one?

Also, are there any plans to rationalise the QoS configuration across different platforms? That's not strictly a 4500-E question but I have concerns that were we to include some of these chassis into a mainly 6500 environment we'd have trouble replicating a PFC-oriented QoS design onto a 4500-E. Have you any advice to offer on this?



samlim Tue, 11/27/2007 - 18:07
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Hi Andrew,

The 4500-E now is MQC compliant, it has 8 queues versus 4 before, and the queue sizes are dynamically assigned as well as configurable.

I believe both the 6500 and 4500 are MQC compliant so they should function in a similar fashion.



mogli Thu, 11/29/2007 - 12:52
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do the cat4500-e chassis support the supervisor 2? we have to increase the number of ports in our wiring closets (from 4503 to 4506-E) but we don't want to change the supervisor module (if possible ;-).

kind regards

samlim Thu, 11/29/2007 - 18:03
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Yes, you can use all the classic Supervisors in the E-series chassis. We have made a deliberate effort to make it backward compatible thus provide you with investment protection.



mogli Fri, 11/30/2007 - 05:15
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thank's for your fast reply. so i can use my classic supervisor 2's running CatOS...?


samlim Fri, 11/30/2007 - 11:03
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Unfortunately CatOS has been EOS for a long time. We are backward compatible only to IOS classic supervisors. In the Sup 2 family, that would be Sup-2+, Sup-2+TS, and Sup-2+10GE



jmprats Fri, 11/30/2007 - 00:17
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Hi, we have a catalyst 6009 with two supervisor 1A, all the system have reached the End of Support status. Then, some questions:

- Are the catalyst 6009 modules compatible with catalyst 4500-E?

- In terms of performance, throughput and capabilities, it could be a good change “downgrade” to a catalyst 4500-E?

- What are the main differences between the two platforms?


samlim Mon, 12/03/2007 - 15:53
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The Cat6000 switch and the Cat4500-E are two different switches offered by Cisco and the modules are not interchangeable. The Cat4500-E offers 320Gbps switching capacity and 250Mpps throughput with Supervisor 6-E. Since both switches are FCS'ed, you may obtain the datasheets and compare.

Hope this helps.


evarnavsky Fri, 11/30/2007 - 00:30
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Hello dear all.

I have a question about the the switching performance for 4510R-E.

According to the data sheet.

the switching performance is 320 Gbps.

Just have a look and follow some computations for the 4510R-E with Supervisor Engine 6-E:

Slot 1 = 24Gb (E-card)

Slot 2 = 24Gb (E-card)

Slot 3 = 24Gb (E-card)

Slot 4 = 24Gb (E-card)

Slot 5 = 20Gb (Supervisor Engine)

Slot 6 = 0 Gb (Redundant Supervisor Engine) Am I right?

Slot 7 = 24Gb (E-card)

Slot 8 = 6 Gb (classic-card)

Slot 9 = 6 Gb (classic-card)

Slot 10= 6 Gb (classic-card)


24Gb x 5 = 120Gb(E-cards)

20Gb x 1 = 20Gb(Supervisor Engine)

6 Gb x 3 = 18Gb(classic-card)

So I have got 120 + 20 + 18 = 158Gb (or 316Gb in full-duplex), but not 320 Gbps.

Where are the rest 4Gb?

Can you help?

Regards, Eugene

ccbootcamp Mon, 12/03/2007 - 00:05
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console port has been upgraded to do 4Gb...

lol (sorry, couldnt resist!)

samlim Mon, 12/03/2007 - 15:55
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Hello Eugene,

The 2 Gig full-duplex or 4 Gig half-duplex comes from the bandwidth to the CPU.

Hope this helps.


csctjp152 Wed, 12/05/2007 - 09:54
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Why does the new Sup6-E supervisor engine within the 4500E series NOT support net flow?

lmasnavi Wed, 12/05/2007 - 12:00
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Hi Tom,

The Supervisor Engine 6-E hardware is not capable of supporting NetFlow, therefore it will never support it.

However, Supervisor Engine V-10GE supports NetFlow, and it works in the 4500-E series chassis.

For more information about 4500-E series with CenterFlex technology, please visit the following links:




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