This got me curious, so I did a bit of digging. http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_data_sheet09186a00801dce34.html
WS-X6704-10GE - 16MB port buffers WS-X6708-10G-3CXL - 200 MB port buffers http://www.cisco.com/en/US/prod/collateral/routers/ps368/data_sheet_c78-49152.html 7600-ES+4TG3CXL - 512MB port buffers On Tue, Mar 31, 2009 at 4:37 PM, Jason Lixfeld <[email protected]> wrote: > Looks like the 6708 isn't as bad as we think. > > On 2009-03-31, at 4:12 PM, Richard A Steenbergen <[email protected]> wrote: > >> On Tue, Mar 31, 2009 at 10:01:24AM +0200, Gergely Antal wrote: >>> >>> I meant that you can not push 40G out of a 6704 >>> even with a dfc attached to it.But you can do it with a 6708 >>> with 1:1 subscription. >> >> Worse, some days you can't even get 7G in from a single port on a 6704 >> with the other 3 ports unused. We routinely have problems with ingress >> interface overruns or egress interface output queue overflows on 6704 >> in that traffic range, and DFC doesn't make any difference. >> >> It seems like it is head of line blocking, and TAC's only answer is >> "those things have no buffers, buy a 6708". The problem can usually be >> worked around by changing the way traffic is being mapped between the >> ports. For example, the one that seems to be the absolute worst case is >> "in one port and out the other on the same fabric channel", i.e. in port >> 1 and out port 2 or the same thing on 3/4. >> >> -- >> Richard A Steenbergen <[email protected]> http://www.e-gerbil.net/ras >> GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC) >> _______________________________________________ >> cisco-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/cisco-nsp >> archive at http://puck.nether.net/pipermail/cisco-nsp/ >> > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
