In an effort to keep from getting too vendor specific on nanog I'll respond to you offline. My initial response to Alex was aimed at giving him something else to consider from a "gotcha" perspective along with his other requirements. Rodney On Mon, Apr 26, 2004 at 03:50:45PM -0400, jlewis@lewis.org wrote:
On Mon, 26 Apr 2004, Rodney Dunn wrote:
That's the most common deployment mistake I see made with the 75xx nowadays. People want to move to dCEF to get added feature capability or either run a new feature that requires dCEF and they don't consider the extra load on the VIP CPU's that is required.
Does dCEF use much more CPU on the VIPs or just memory (to store the fowarwarding table on the VIP)? My experience has been that a 7500 with RSP4's and VIP2-50's (with dCEF) will handle much more packet forwarding than a 7206VXR NPE300...but with full BGP routes, you need at least 64mb (preferably 128mb) on the VIPs or you can't use dCEF. Not using dCEF largely defeats the purpose of using a 7500, doesn't it?
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