27x40 gbe operating modes, Table 2 – Brocade VDX 8770-4 Hardware Reference Manual User Manual
Page 27
Brocade VDX 8770-4 Hardware Reference Manual
7
53-1002563-04
Brocade VDX 8770-4 line cards
1
•
For the 48x10 GbE line card, up to 8 ports are allowed per trunk. Select ports from octet port
groups consisting of ports 1-8, 9-16, 17-24, 25-32, 33-40, and 41-48.
•
For the 48x10G-T line card, up to 16 ports are allowed per trunk. Select ports from three port
groups consisting of ports 1-16, 17-32, and 33-48.
•
For the 12x40 GbE line card, up to two 40GbE ports are allowed per trunk when these ports
are configured in breakout mode to provide 10GbE interfaces. Select ports from six port
groups consisting of 40GbE ports 1-2, 3-4, 5-6, and 7-8, 9-10, and 11-12.
•
For the 27x40 GbE line card, 40GbE ports must be configured in breakout mode to provide
10GbE interfaces for trunking. There are nine port groups consisting of 40GbE ports 1-3, 4-6,
7-9, 10-12, 13-15, 16-18, 19-21, 22-24, and 25-27. The following rules apply to configuring
breakout mode and trunking on ports in these groups:
-
You must configure a port group in Performance operating mode. Breakout mode is not
supported on ports configured in Density (default) operating mode.
-
When the port group is in Performance mode, you can only configure the first two ports in
the port group in breakout mode, since the third port in the group is disabled. Hence,
trunking is only supported on the first two ports in the port group.
NOTE
For more information on Performance and Density operating modes, refer to
operating modes on 27x40 GbE line cards”
27x40 GbE operating modes
The 27x40 GbE line card supports nine port groups of three ports each that you can configure for
Performance or Density operating modes.
•
Performance mode - Because the line card is oversubscribed and cannot support the 40 Gbps
line rate on all 27 ports, you can configure Performance mode to achieve 40 Gbps rate for up
to 18 ports. When a port group is configured In Performance mode, the third port in the port
group is persistently disabled, but the remaining two ports operate at up to 40 Gbps to achieve
the 80 Gbps maximum rate for the port group. QSFP breakout mode is only supported on ports
configured in Performance mode.
•
Density mode - This is the default mode for all the port groups. In this mode, all the three
ports are enabled in each group, but cannot support the 40 Gbps maximum rate. If this
mode is configured on all port groups, 27 total ports are available for use.
Configure Performance or Density mode for individual port groups using Network OS commands
(refer to the Network OS Command Reference).
For configuring operation modes, ID numbers are assigned to each port group sequentially from
port 1 through 27 as shown in the
TABLE 2
27x40 GbE line card port groups
Port Group ID
Port Numbers
1
1-3
2
4-6
3
7-9
4
10-12