Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 542)

Platforms supporting breakout TABLE 88
Platform Port configuration QSFP ports
VDX 6740
VDX 6740T
VDX 6740T-1G
48 10G plus 4 40G
VDX 6740T-1G ports can be upgraded from to 10G with
Port Upgrade license.
4 (with 40GbE Port Upgrade license)
VDX 8770-4
VDX 8770-8
12x 40G and 27x40G 12 (12x40G) and 27 (27x40G)
27x40G line card restrictions
The 27x40G line card supports nine port groups of three ports each that you can configure for
Performance or Density operating modes. If a port group is configured for Performance mode, the first
two ports in a group are enabled in Performance mode, but the third port is disabled. If a port group is
set for Density mode, all three ports operate in Density mode. Breakout mode can only be configured
on ports enabled for Performance mode.
For more information on these modes, line card port groups, and instructions for configuring
Performance mode on port groups, refer to the following sections in the Brocade VDX 8770-4
Hardware Reference Manual or Brocade VDX 8770-8 Hardware Reference Manual:
• "27x40 GbE operating modes"
• "Configuring operating modes on 27x40 GbE line cards"
Breakout mode interfaces
The SFP connector ID identifies a physical front-end SFP and has the same meaning as the port ID
used in the interface name. The connector ID infers which interfaces are created or deleted as a result
of the breakout mode change. All interfaces at this connector must be disabled before the command is
accepted. An interface created on an SFP in breakout-enabled mode adds a numeric suffix followed
by a colon to the existing interface name.
This nomenclature identifies that a port is in breakout mode. For example, consider line card 2 port 1
on a node with RBridge ID 3 that has a Quad SFP (QSFP) in breakout disabled mode. If breakout is
then set to enabled, the existing interface Fo 3/2/1 is deleted and four new interfaces —Te 3/2/1:1, Te
3/2/1:2, Te 3/2/1:3 and Te 3/2/1:4— are created. When the interface is deleted, any configuration on
this interface is deleted as well. The new interfaces created have the default port configuration. If
breakout is then set to disabled, the four Te interfaces are deleted and a single Fo interface is created.
The condition in which the command is executed and becomes effective is both line card-dependent
and platform-dependent.
• On chassis systems, if a line card supports only static configuration, then this command is
supported only when the line card is in the power off state, and the mode change is effective only
after the switch is powered on.
• On the Brocade VDX 6740 series platforms, this command is supported only when the interface is
in the shutdown state, and the mode change is effective only after the switch reboots.
• For Brocade 27x40G line cards, breakout mode is supported only on port groups configured in
Performance operating mode and only on the first two 40G ports in those port groups. For more
information, refer to the Brocade 8770 Hardware Reference Manuals under the section on
configuring operating modes for the 27x40 GbE line card.
The table below shows an example of an SFP in breakout mode and its respective interface names.
Breakout mode interfaces
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