On 4/25/11 8:54 PM, "Ben Pfaff" <[email protected]> wrote: >On Tue, Apr 26, 2011 at 12:43:28AM -0300, Victor Torres wrote: >> As i was studying the queue mechanisms of OpenFlow 1.0, i found out >> that there can be a Max of 8 queues on a single switch, is that true? >> Are there any workarounds for this? >> Anyone knows if OpenVSwitch has the same limitation (don't know if it >> is a protocol issue, or implementation issue)? > >If the OpenFlow 1.0 reference implementation has an 8-queue limitation, >then that is an implementation issue. Open vSwitch does not have a >8-queue limitation. Its limit is closer to 65000 queues per network >device. (However, some reconfiguration costs are linear in the number >of queues, so in practice I would recommend limiting queues to a few >hundred if you can.)
A lot of hardware switching ASICs limit themselves to eight queues and then just map the 3-bit PCP value from the VLAN header into it. As Ben indicated, software switches, like Open vSwitch, don't typically have this limitation. --Justin _______________________________________________ openflow-discuss mailing list [email protected] https://mailman.stanford.edu/mailman/listinfo/openflow-discuss
