Hi Arne, When you enter the mls qos 10g-only command, a supervisor engine with both 1-Gigabit and 10-Gigabit Ethernet uplink ports reallocates the interface queue capacity to improve the performance of its 10-Gigabit Ethernet ports. The reallocation is possible only in 10g-only mode, in which the supervisor engine's 1-Gigabit Ethernet ports are not used. In the normal mode, when all supervisor engine ports are active, the queue structure is 2q4t on receive and 1p3q4t on transmit. In 10g-only mode, the queue structure is 8q4t on receive and 1p7q4t on transmit.
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_m2.html#wp1041041 Andras On Sat, Nov 26, 2011 at 5:30 PM, Arne Larsen / Region Nordjylland <[email protected]> wrote: > Hi all > > > Can someone explain exactly what the vss command mls qos 10g-only does. > I know it changes queuing and buffer mechanism, but I'm a bit astonished by > the impact. > We had a problem on a datacenter where we uses a VSS144 setup. > We have both vss links on the supervisior modules. > The problem was between Xen provisionings servers and Xen client hosts. The > Xen client OS that is streamed to the client, had retransmissions. > After enabling the command all works fine. > We are talking max 3Gb certain rate. Can this really overrun the vss-links ?? > > /Arne > > _______________________________________________ > 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/
