Qlogic QLA2 Series, Руководство пользователя, Страница: 165 / 348

3–Interactive Commands
FCoE Menu (Command Line Option -cna)
SN0054614-00 K 3-113
----------------------------
DCBX Enable : Enabled
Willing : Enabled
Port Pause Type : Per Priority Pause
SAN Priority COS : 3
----------------------------
ETS
----------------------------
Priority Txt Mode : Bandwidth
SAN Bandwidth Percent
: 50
SAN Unused Bw To LAN : Enabled
LAN Unused Bw To SAN : Disabled
Table 3-13 provides descriptions of the DCBX and enhanced transmission
selection (ETS) settings shown in the preceding example.
Table 3-13. DCBX and ETS Configuration Parameters
Parameter Description
DCBX Enable
When DCBX is enabled, the switch connected to the host over this adapter
port negotiates these port parameter settings. You cannot disable DCBX.
Willing
This read-only parameter is from the switch. You cannot disable Willing.
Port Pause Type
Specifies the default port pause type as either
Standard
or
Per Prior-
ity Pause
. Pause is a frame that controls the flow between transmitter
and receiver, when the transmitter sends data at a higher rate than the
receiver. In such situations, the receiver sends a PAUSE frame to the
transmitter and the transmitter suspends transmission for the specified
time.
„
Standard
applies to all the frames. Standard pause is enabled by
default on the server facing Ethernet ports as well as the network facing
Ethernet ports. This setting affects the connection only when connected
to a peer that is not configured with DCBX protocol.
„
Per Priority Pause
enables you to manage pauses in traffic
according to assigned priorities to CoS frames (for example, on a
per-flow basis). Priority flow control applies to servers with a single
adapter interface, which could carry traffic for LAN, SAN, and IPC. In
this case, SAN traffic is marked with specific COS to identify it as a dis-
tinct flow among other flows (LAN or IPC); you can apply a pause to this
specific COS to assure loss-less SAN frames. When connected to a
DCBX-enabled peer, the pause type is automatically set with per-prior-
ity pause when the peer sends a priority flow control time length value,
regardless of this parameter setting.