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For more information on configuring breakout mode, refer to the
Trunking
Network OS supports Brocade trunks (hardware-based link aggregation groups, or LAGs). These trunks are dynamically formed
between two adjacent devices with connected interswitch link (ISL) ports unless trunking is disabled on connecting ports. Traffic is evenly
distributed along all links in a trunk. For more information on Brocade Trunking and enabling and disabling trunking, refer to the
"Configuring Brocade VCS Fabrics" chapter in the
Trunking is supported on GbE interface ports of all line cards.
Port groups
Port groups are established for trunking on supported line cards. To successfully form a trunk from line card ports to another device,
select ports from same line card port group and configure each port to operate at the same speed. Following are trunk and port group
specifications for supported line cards:
∙
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.
Trunking two 40 GbE ports
To form an 80 Gbps trunk between two 40 GbE QSFP transceivers on a 40 GbE line card for an ISL connection, use the following
steps:
1.
Configure each QSFP interface in breakout mode, as if you were connecting four separate 10GE transceivers, then reboot the
line card.
2.
Use a crossover MTP or MPO 40GE (12-strand) OM3/OM4 Fibre to connect the QSFPs to each other.
For more information on Brocade Trunking and configuring breakout mode, refer to the following:
∙
"Configuring SFP Breakout Mode" in the
∙
"Brocade Trunks" in the
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.
20
Network OS Administrator's Guide .
Network OS Layer 2 Switching Configuration Guide
Network OS Administration Guide
Network OS Administrator's Guide .
Product Overview
Brocade VDX 8770-4 Hardware Installation Guide
53-1002563-10
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