Switches with support for NetFlow and Fast Ethernet SFP?

[michaelbs]

Hi,

we are looking into replacing an old Cisco 2950 Switch by a new model that should support NetFlow and the ability to use Fast Ethernet Single Mode SFPs (GLC-FE-100LX). Is there a model offered by Cisco that can be used with this configuration? At first I thought a WS-C3560X-24T-S with the C3KX-SM-10G Service Module could work but unfortunately it seems that the service module only supports GbE SFPs.

If not, could we use a router instead and use it as switch only? Actually the only thing we want achive is to use aquire netflow statistics for our uplink port to the Internet.

Thanks
Michael

[Michael Patterson]

The 2960-X supports sampled NetFlow and lists single mode fiber support on this page:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12995/data_sheet_c78-728232.html

[michaelbs]

Thank you, but the 2960-X only seems to support the GLC-GE-100FX which is multi mode fiber:

http://www.cisco.com/en/US/docs/interfaces_modules/transceiver_modules/compatibility/matrix/OL632702.html

We also need full NetFlow since we need to account traffic, as to my understanding sampled NetFlow cannot be used for that since not everything is captured.

[sathvik k v]

Hi,

Cisco 3750 supports GLC-GE-100FX but to my knowledge netflow is not supported. Would suggest to use Cisco-4500 which would meet your requirements.

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/20ew/configuration/guide/nfswitch.html

http://www.cisco.com/en/US/docs/interfaces_modules/transceiver_modules/compatibility/matrix/OL632702.html

			Minimum Software Release Required
Platform	Switch or Module	Transceiver Model	Catalyst Operating System	Cisco IOS Release
Catalyst 4500 series	WS-X4248-FE-SFP	GLC-FE-100FX GLC-FE-100LX GLC-FE-100BX-D GLC-FE-100BX-U	—	12.2(25)SG
		GLC-FE-100EX GLC-FE-100ZX	—	12.2(53)SG8
	WS-X4640-CSFP-E WS-4624-SFP-E WS-X4612-SFP-E	GLC-GE-100FX	—	15.1(1)SG

Regards,

Sathvik K V

[michaelbs]

Hi Sathvik,

thank you, I think the Cisco 4500 is too expensive for us. Do you know if it is possible to somehow throttle a GbE SFP to 100mbps? We are currently using a dark fibre to our ISP where the fibre teminates on a 100mbps SX SFP. In our buliding we use a media converter that converts from fibre to copper. We now don't want to use the media converter anymore and therefore need a switch that allows us to connect the fibre directly, which as to my understanding is only possible if we use a 100mbps SX SFP as well. Unfortunately most switches don't seem to support 100mbps SX SFPs and NetFlow together.

Thanks
Michael