Extreme Networks Summit 200-24, Hardware Installation Manual

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Configuring I/O Modules
Extreme Networks Consolidated "i" and "e" Series Hardware Installation Guide 187
GM-16X
3
Module
Figure 103 shows the GM-16X
3
module.
Figure 103: GM-16X
3
module
The GM-16X
3
module has 16 1000BASE-X ports using mini-GBIC (or small form factor pluggable (SFP))
slots.
The GM-16X
3
ports are oversubscribed 4:1 to the Alpine backplane. The module has four groups of four
ports each. Each group multiplexes traffic into a single full-duplex gigabit link to the switch fabric.
To take advantage of this architecture, use a single port in each group before using all of the ports in
any particular group. Table 35 lists the port groups for the GM-16X
3
module.
Populate ports 1, 5, 9, and 13; then ports 2, 6, 10, and 14; then ports 3, 7, 11; and 15, and finally ports 4,
8, 12, and 16.
NOTE
If congestion is detected on a port with flow control enabled, a flow control PAUSE frame is sent out
that port. The PAUSE frame is not sent out on the other ports in the group.
Table 36 lists the number of GM-16X 3 modules you can install in an Alpine chassis.
Table 35: GM-16X 3 port groups
Ports Group
1, 2, 3, 4 1
5, 6, 7, 8 2
9, 10, 11, 12 3
13, 14, 15, 16 4
Table 36: GM-16X
3
configurations supported
Chassis GM-16X 3 Modules
Alpine 3802 1 (or 1 GM-16T
3
module),
installed in slot 1 or slot 2 only
Alpine 3804 4
Alpine 3808 8
GM16X3
Port status LEDs
Module
status LED
Mini-GBIC ports