Extreme 3802 Installation Guide
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
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.
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.
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