Are you saying that you're altering the OpenFlow protocol so that it can specify VLAN tags larger than two bytes? And modifying a switch so that it can match and probably insert and remove these larger VLAN tags? (If so, I'd have thought that using VXLAN would be an easier way or that using an extension would be cleaner, but that's another issue.)
So you're getting an error from the switch saying that it thinks you've sent it a flow-mod with the emergency flag *and* timeouts set, which isn't allowed. Assuming that you're not trying to set an emergency flow, the most likely explanation here is that the flow-mod is either being constructed wrong or parsed wrong. If you're modifying the match structure to accommodate larger VLAN tags, make sure you've modified it the same way on both the switch and controller. -- Murphy On Feb 1, 2015, at 3:35 AM, AMER <amer7...@hotmail.com> wrote: > Dear all > > I am using POX carp > I am receiving this error > > [00-00-00-00-00-02 143] Error: header: > [00-00-00-00-00-02 143] Error: version: 1 > [00-00-00-00-00-02 143] Error: type: 1 (OFPT_ERROR) > [00-00-00-00-00-02 143] Error: length: 76 > [00-00-00-00-00-02 143] Error: xid: 719 > [00-00-00-00-00-02 143] Error: type: OFPET_FLOW_MOD_FAILED (3) > [00-00-00-00-00-02 143] Error: code: OFPFMFC_BAD_EMERG_TIMEOUT (3) > [00-00-00-00-00-02 143] Error: datalen: 64 > [00-00-00-00-00-02 143] Error: 0000: 01 0e 00 48 00 00 02 cf 00 10 00 1f 00 > 00 00 00 |...H............| > [00-00-00-00-00-02 143] Error: 0010: 00 00 00 00 00 00 00 00 00 00 4e 6f 6e > 65 00 00 |..........None..| > [00-00-00-00-00-02 143] Error: 0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 > 00 00 00 |................| > [00-00-00-00-00-02 143] Error: 0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 > 03 00 00 |................| > INFO:openflow.of_01:[00-00-00-00-00-01 144] closed > INFO:openflow.of_01:[00-00-00-00-00-02 143] closed > > I am trying to extend the vlan header size, sorted almost all errors but > finally I am facing this and I do not understand it. > > Best regards, > Amer > > Eng Amer Alghadhban > COE > SANS-GCFW > CEH, SCNP, CCNA
