11-26-2007 03:08 AM - edited 03-03-2019 07:40 PM
Hi all.
I am deciding the purchase of equipment, and I have a question to finish.
My setup in the following:
7604-RSP720C-P Cisco 7604 Chassis,4-slot,RSP720-3C,PS)
WS-X6748-GE-TX= Cat6500 48-port 10/100/1000 GE Mod: fabric enabled, RJ-45
S763ISK9-12218SXF Cisco 7600-SUP720 IOS IP SERVICES SSH
PWR-2700-AC/4= 2700W AC Power Supply for Cisco 7604/6504-E
And as the next link says, the IPv4 routing is of Up to 450 Mpps** In hardware, where ** is Requires DFC3's.
http://www.cisco.com/en/US/products/hw/modules/ps2797/products_data_sheet09186a0080159856.html
http://www.cisco.com/en/US/products/hw/routers/ps368/products_data_sheet0900aecd8057f3b6.html
My question is about if i need a DFC Card to have IPv4 routing of up 450Mpps or not.
Or like the daugther card is a PFC (RSP 720-3C
), does it need?
12-03-2007 09:37 AM
The DFC3A only supports a total of 224K FIB entries, by default there are 192K IPv4/MPLS and 32K Multicast/IPv6. If you have in your custody a linecard with a DFC3BXL, that will move your routes up to 1024K IPv4. You can achieve this also by using a card that does not have a DFC.
12-03-2007 03:29 PM
Without a DFC, each linecard must put all input packet headers on a central bus so that the PFC on the supervisor can make a forwarding decision. The speed of this central bus limits the total PPS numbers you can achieve in a chassis. If you have all fabric-enabled cards in a chassis with no DFC's, you can get 30M PPS through the chassis. If you have a classic linecard (non-fabric), your performance is lowered to 15M PPS.
If you put a DFC on a linecard, the central bus is no longer needed for forwarding decisions, so it can process up to 48M PPS on packets coming in to it.
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