Users Guide

This functionality to set the uplink speed is available from the CLI or the CMC interface when the
Aggregator functions as a simple MUX or a VLT node, with all of the uplink interfaces configured to be
member links in the same LAG bundle. You cannot configure the uplink speed to be set as 40 GbE if the
Aggregator functions in programmable MUX mode with multiple uplink LAG interfaces or in stacking
mode. This is because CMC is not involved with the configuration of parameters when the Aggregator
operates in either of these modes, with the uplink interfaces being part of different LAG bundles.
After you restart the Aggregator, the 4-Port 10 GbE Ethernet modules or the 40GbE QSFP+ port that is
split into four 10GbE SFP+ ports cannot be configured to be part of the same uplink LAG bundle that is
set up with the uplink speed of 40 GbE. In such a condition, you can perform a hot-swap of the 4-port 10
GbE Flex IO modules with a 2-port 40 GbE Flex IO module, which causes the module to become a part
of the LAG bundle that is set up with 40 GbE as the uplink speed without another reboot. The Aggregator
supports native 40 GbE mode for QSFP ports only in simple MUX mode and stacking mode of operation.
In stacking mode, the base 40 GbE module ports are used for stacking and native 40 GbE uplink speed is
enabled for only the QSFP+ ports on the optional 2-Port 40-Gigabit Ethernet QSFP+ FlexIO modules.
The following table describes the various speeds in different Aggregator modes. If a 4x10G SFP+ or a
4x10BASE-T module is plugged in and 40 GbE mode is configured, it is in error-disabled state.
Table 21. Speeds in Different Aggregator Modes
Module Type Standalone
10G mode
Standalone
40G Mode
Stacking 10G
Mode
Stacking
40G mode
VLT 10G
Mode
VLT 40G
Mode
Base module 10G 40G 40G (HiGig) 40G
(HiGig)
40G (Native) 40G
(Native)
Optional
module (2
40GbE)
10G 40G 10G 40G 10G 40G
Optional
modules (4
10GbE)
10G Error 10G Error 10G Error
FC module 10G 10G 10G 10G 10G 10G
To configure the uplink speed of the member interfaces in a LAG bundle to be 40 GbE Ethernet per
second for the Aggregator that operates in standalone, stacking, or VLT mode, perform the following
steps:
Specify the uplink speed as 40 GbE. By default, the uplink speed of the LAG bundle is set as 10 GbE.
You cannot configure the uplink speed if the Aggregator operates in programmable MUX mode. The
stack-unit unit-number iom-mode [stack | standalone | vlt] 40G command is
available in the CMC interface and the CLI interface.
CONFIGURATION
stack-unit unit-number iom-mode [stack | standalone | vlt] 40G
You can use the show system stack-unit unit-number iom-uplink-speed command to view
the uplink speed of the LAG bundles configured on the Flex IO modules installed on the Aggregator. The
value under the
Boot-speed field in the output of the show system stack-unit command indicates
the uplink speed that is currently effective on the LAG bundles, whereas the value under the Next-Boot
field indicates the uplink speed that is applicable for the LAG bundle after the next reboot of the switch.
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Stacking