Cisco Catalyst 6840 Series Hardware Installation Manual page 24

SFP and SFP+ Transceiver Module Ports
Catalyst 6840-X-LE-40G
Figure 8: 10G native port numbering
Table 5: Port mapping for Catalyst 6840-X-LE
10-Gigabit ports
1, 2, 3, and 4
5, 6, 7, and 8
9, 10, 11, and 12
13, 14, 15, and 16
17, 18, 19, and 20
21, 22, 23, and 24
25, 26, 27, and 28
29, 30, 31, and 32
33, 34, 35, and 36
37, 38, 39, and 40
40-Gigabit native ports
41
42
9
To configure 10G ports to function as 40G ports, you need to use adapter cables that connect four 10G
SFP+ ports of the switch on one end to a 40G QSFP port of the switch on the other end.
10
To configure 40G ports to function as 10G ports, you need to use Cisco QSFP to four SFP+ Active
Optical Breakout Cables that connect a 40G QSFP port of the switch on one end to four 10G SFP+ ports
of the switch on the other end.
Catalyst 6840-X Switch Series Hardware Installation Guide
12
Configurable 40-Gigabit ports
51
52
53
54
55
56
57
58
59
60
Configurable 10-Gigabit ports
43, 44, 45,, and 46
47, 48, 49, and 50
Product Overview
9
10