> The pps limit of EARL7 is packet size agnostic, only headers are > transmitted. And actually it's not EARL7 that craps out at ~30Mpps, > it's the bus, the bus is fully saturated with pushing packets > for EARL7 to do it's lookup. > > I think it's like 32btes per cycle, IP is 2 cycles and MPLS is > 3 cycles (since it needs IP if you do ECMP). Bus is 62.5MHz, I think. > So from this we'd arrive at: > > (62.5*1000000)/2/1000000 = 31.25Mpps IP > (62.5*1000000)/3/1000000 = 20.83Mpps MPLS > > This of course assumes that bus will only have headers for lookup, > that is, you don't have classic LC's that use bus for transferring > data.
ok, so if its just the headers that go to the PFC, when using CEF-720 LCs without DFCs, and IPv4 only traffic (no MPLS, no IPv6), then it looks like the 'sh catalyst6000 traffic-meter' is more true to the real load that the box can handle than I originally thought. Of course you need to watch the fabric channel load as well for the actual data going through. cheers anton _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
