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Catalyst 6500 Series Switch Module Installation Guide
78-15725-02
Chapter 1      Product Overview
Gigabit Ethernet Switching Modules
The WS-X6516-GBIC module has enhanced QoS features. The QoS port 
architecture (Rx/Tx) for this module is 1p1q4t/1p2q2t.
The WS-X6516-GBIC module has a single fabric channel interface. The 
switching module is upgradable to support distributed forwarding by installing an 
optional Distributed Forwarding Card (WS-F6K-DFC).
Figure 1-31 16-Port Gigabit Ethernet Switching Module (WS-X6516-GBIC)
The front panel LEDs are described in Table 1-6 on page 1-47.
16-Port Gigabit Ethernet Switching Module (WS-X6516A-GBIC)
The 16-port Gigabit Ethernet switching module (WS-X6516A-GBIC) provides 
16 switched, full-duplex Gigabit Ethernet ports that you can configure with any 
combination of 1000BASE-SX, LX/LH, and ZX GBICs, copper GBICs, or 
CWDM GBICs. (See Figure 1-31.)
Note CWDM GBICs are used with the CWDM Passive Optical System. For more 
information on the CWDM Passive Optical System, refer to the Installation Note 
for the CWDM Passive Optical System.
The WS-X6516A-GBIC module has enhanced QoS features. The QoS port 
architecture (Rx/Tx) for this module is 1p1q4t/1p2q2t. The module has 1 MB per 
port buffers.
The WS-X6516A-GBIC module has a single fabric channel interface. The 
switching module is upgradable to support distributed forwarding by installing an 
optional Distributed Forwarding Card (WS-F6K-DFC).
44315
16 PORT GIGABIT ETHERNET
WS-X6516-GBIC
2
S
T
A
T
U
S
LIN
K
LIN
K
1
12
4
LIN
K
LIN
K
3
34
6
LIN
K
LIN
K
5
56
8
L
IN
K
LIN
K
7
78
10
LIN
K
L
IN
K
9
910
12
L
IN
K
LIN
K
11
11
12
14
LIN
K
L
IN
K
13
13 14
16
L
IN
K
L
IN
K
15
15 16