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Catalyst 4500 Series cards questions

Hi

I`m buying some refurbished equipment, trying to keep budget down .
Got some questions about some cards for the Catalyst 4500 Series switches.

The WS-X4648-RJ45-E card is overbooked 2:1.
The WS-X4448-GB-SFP card is overbooked 8:1.
Is this meaning backplane limit for these cards is 24/6Gbps, or are interfaces sharing bandwidth in any way, in example interface 1 and 2 sharing 1Gbps FDx when overbooked 2:1, and interface 1 to 8 sharing 1Gbps FDx when overbooked 8:1?
Think it has to be the backplane, but have to be absolute sure here.

Also, the 10GE interfaces are very expensive.
Thinking about using another supervisor engine (SUP7-E) to get some more 10GB interfaces.
Any problems or drawbacks using these as regular aggregation interfaces other than poor port density?

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Disclaimer

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages wha2tsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

Generally, 4500 support 6, 24 or 48 Gbps per slot.  Specifics depend on chassis, supervisor and line card.

Some line cards group certain ports for bandwidth to the fabric; this is usually noted on the data sheets for the line cards.  For example the WS-X4418-GB:

   2 ports of wire-speed 1000BASE-X Gigabit Ethernet uplinks

   16 ports: 4:1 oversubscribed

Your 4648 and 4448, ports aren't noted as being grouped.  I.e. all their ports appear to share the 24 and 6 Gbps, respectively.

Yes, you can use supervisor ports as you wish.  Do note, when using two supervisors, by default, only two 10g ports, per sup, are enabled by default.  You can enable all the ports (with over subscription).

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VIP Expert

Disclaimer

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages wha2tsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

Generally, 4500 support 6, 24 or 48 Gbps per slot.  Specifics depend on chassis, supervisor and line card.

Some line cards group certain ports for bandwidth to the fabric; this is usually noted on the data sheets for the line cards.  For example the WS-X4418-GB:

   2 ports of wire-speed 1000BASE-X Gigabit Ethernet uplinks

   16 ports: 4:1 oversubscribed

Your 4648 and 4448, ports aren't noted as being grouped.  I.e. all their ports appear to share the 24 and 6 Gbps, respectively.

Yes, you can use supervisor ports as you wish.  Do note, when using two supervisors, by default, only two 10g ports, per sup, are enabled by default.  You can enable all the ports (with over subscription).

View solution in original post

Beginner

Exactly what I needed to know

Exactly what I needed to know :)
Thank you very much.