Watching the latest emails about DFC cards, i was wondering if the addition of WS-F6700-DFC3BXL cards to WS-X67xx modules would help a 6500/7600 in nay case, when used exclusively as a L2 switch (plus 802.1q tunneling/QoS/ACLs).
According to CCO: The Cisco? Catalyst? 6500 Series Distributed Forwarding Card 3 (DFC3), including WS-F6700-DFC3A (DFC3A), WS-F6700-DFC3B (DFC3B), WS-F6700-DFC3BXL (DFC3BXL), is an optional daughter card for CEF720-based line cards such as WS-X6704-10GE, WS-X6724-SFP, WS-X6748-SFP, and WS-X6748-GE-TX. The DFC3 provides localized forwarding decisions for each line card and scales the aggregate system performance to reach up to 400 mpps. The new DFC3B and DFC3BXL offer enhancements to support Multiprotocol Label Switching (MPLS) and Access Control Entries (ACE) counters on the Cisco 6700 Series line cards. The DFC3BXL also has improved scalability to support one million IPv4 routes and 256-KB NetFlow entries. Does the 400 mpps forwarding performance have any relationship with L2 switching? Can you enable and use netflow on a L2 switch? Something i could think of is probably "better" QoS characteristics. 6509#sh int gi1/1 capabilities | inc Model|QOS Model: WS-X6724-SFP QOS scheduling: rx-(1q8t), tx-(1p3q8t) <- CFC 6509#sh int gi8/1 capabilities | inc Model|QOS Model: WS-X6724-SFP QOS scheduling: rx-(2q8t), tx-(1p3q8t) <- DFC3BXL Also when using non-fabric & fabric modules (yep, i know that's a no), the fabric ones with DFCs use "dCEF/flow through" as a Switching Mode, while the fabric ones without DFCs use "Crossbar/CEF/truncated". Is there any advantage of this on L2 switching? 6509#sh platform hardware capacity system System Resources PFC operating mode: PFC3BXL Supervisor redundancy mode: administratively sso, operationally sso Switching resources: Module Part number Series CEF mode 1 WS-X6724-SFP CEF720 CEF 2 WS-X6724-SFP CEF720 CEF 6 WS-SUP720-3BXL supervisor CEF 8 WS-X6724-SFP CEF720 dCEF 9 WS-X6408A-GBIC classic CEF 6509#sh fabric switching-mode Global switching mode is Truncated dCEF mode is not enforced for system to operate Fabric module is not required for system to operate Modules are allowed to operate in bus mode Truncated mode is allowed, due to presence of DFC, CEF720 module Module Slot Switching Mode 1 Crossbar 2 Crossbar 6 Bus 8 dCEF 9 Bus 6509#sh platform hardware capacity fabric Switch Fabric Resources Bus utilization: current: 0%, peak was 67% at 15:39:57 EET Thu Feb 15 2007 Fabric utilization: Ingress Egress Module Chanl Speed rate peak rate peak 1 0 20G 0% 1% @09:35 15Feb07 1% 26% @16:36 15Feb07 2 0 20G 1% 3% @23:13 13Jun07 1% 1% @15:40 24May07 6 0 20G 0% 11% @06:41 30Mar07 0% 26% @16:36 15Feb07 8 0 20G 0% 26% @16:36 15Feb07 0% 11% @06:41 30Mar07 Switching mode: Module Switching mode 1 truncated 2 truncated 6 flow through 8 compact Is there something else i'm missing? -- Tassos _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/