User Guide

1682 OpenFlow
The desc field in the message contains port information. This field of type
ofp_ port contains the following elements:
1 port_no — Set to the MIB-2 ifIndex field for the port.
2 hw_addr — All ports in the switch have the same MAC address. The
switch reports the lowest MAC assigned to the unit. This address is
typically printed on the MAC address label on the switch.
3 name — A unit/slot/port designation for physical ports and LAGs. The
LAGs are also identified with the symbolic name lag-<n>.
4 config — Always set to 0.
5 state — The OFPPS_LINK_DOWN is set according to the link state for
physical ports and LAGs. The remaining bits are always 0.
6 curr, advertised, supported, peer — These parameters are set to 0.
7 curr_speed – Current port bitrate in kbps.max_speed—Max port bitrate in
kbps
The Dell EMC Networking OpenFlow Hybrid switch reports port statistics in
response to the OFPT_STATS_REQUEST message with type
OFPST_PORT. The port statistics are reported using the structure of type
ofp_port_stats. The packet and byte counters are reported for all interface
types. The only supported error counters are rx_errors and tx_errors. The
remaining error counters are always reported as 0xffffffffffffffff.
Queue Configuration and Status
The Dell EMC Networking OpenFlow Hybrid switch supports eight queues
for each physical port. The LAGs report aggregate statistics for member ports.
The port queues are automatically created by the switch for each physical
port.
The port queues are prioritized, with queue 7 having the highest priority. The
traffic statistics reported for the port queues include OpenFlow traffic and
non-OpenFlow traffic.
The OpenFlow Controller retrieves the list of port queues using the
OFPT_QUEUE_GET_CONFIG_REQUEST message. Only physical ports
and LAGs can be specified in the message.