The chassis contains 16/24/32/40 ports of 10-Gigabit Ethernet SFP+ or 100BASE-FX fiber-optic transceiver modules. All ports support 1-Gigabit SFP, 10-Gigabit SFP+, or 100BASE-FX fiber-optic SFP modules with two 40-Gigabit uplink ports on selected switch models.

The ports also support Cisco Trust Security (CTS) and virtual switch link (VSL) and can operate as an Instant Access (IA) Parent in both 1-Gigabit, 10-Gigabit modes and 40-Gigabit modes.

The SFP and SFP+ transceiver modules provide copper or fiber-optic connections to other devices. These transceiver modules are field-replaceable and provide the uplink interfaces when installed in an SFP module slot. The SFP transceiver modules have LC connectors for fiber-optic connections or RJ-45 connectors for copper connections.

For a list of supported SFP and SFP+ modules, see the switch data sheet: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6800-series-switches/datasheet-c78-734470.html.

The odd-numbered ports are on the upper row and the even-numbered ports on the lower row. The following figures show how the ports and the LEDs are numbered on different switch models. This section also explains the port mapping between 10-Gigabit and 40-Gigabit ports.

Catalyst 6816-X-LE

Table 2. Port mapping for Catalyst 6816-X-LE

10-Gigabit ports	Configurable 40-Gigabit ports5
1, 2, 3, and 4	17
5, 6, 7, and 8	18
9, 10, 11, and 12	19
13, 14, 15, and 16	20

⁵ 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.

Catalyst 6832-X-LE

Table 3. Port mapping for Catalyst 6832-X-LE

10-Gigabit ports	Configurable 40-Gigabit ports 6
1, 2, 3, and 4	33
5, 6, 7, and 8	34
9, 10, 11, and 12	35
13, 14, 15, and 16	36
17, 18, 19, and 20	37
21, 22, 23, and 24	38
25, 26, 27, and 28	39
29, 30, 31, and 32	40

⁶ 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.

Catalyst 6824-X-LE-40G

Table 4. Port mapping for Catalyst 6824-X-LE

10-Gigabit ports	Configurable 40-Gigabit ports 7
1, 2, 3, and 4	35
5, 6, 7, and 8	36
9, 10, 11, and 12	37
13, 14, 15, and 16	38
17, 18, 19, and 20	39
21, 22, 23, and 24	40
40-Gigabit native ports	Configurable 10-Gigabit ports 8
25	27, 28, 29, and 30
26	31, 32, 33, and 34

⁷ 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.

⁸ 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-LE-40G

Table 5. Port mapping for Catalyst 6840-X-LE

10-Gigabit ports	Configurable 40-Gigabit ports 9
1, 2, 3, and 4	51
5, 6, 7, and 8	52
9, 10, 11, and 12	53
13, 14, 15, and 16	54
17, 18, 19, and 20	55
21, 22, 23, and 24	56
25, 26, 27, and 28	57
29, 30, 31, and 32	58
33, 34, 35, and 36	59
37, 38, 39, and 40	60
40-Gigabit native ports	Configurable 10-Gigabit ports10
41	43, 44, 45,, and 46
42	47, 48, 49, and 50

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.

The chassis has two power supply slots that accept either AC-input or DC-input power supplies, or one of each. The chassis is delivered with power supplies pre-installed in the power supply slots. If only one power supply is ordered, then a blank cover is installed in the empty power supply slot, which must remain installed if a power supply is not installed.

The management port is a 10/100/1000 copper Ethernet port directly connected to the route processor. The switch also has a fibre port that can be used as the Ethernet Management port. It supports TFTP image downloading, network management, SNMP, Telnet, and SSH connections. Flexible NetFlow export is not supported on the management port. The management port is isolated from other ports in the system in a dedicated management VRF; it is not part of the EARL forwarding logic. The management port provides direct access to the CPU, even when the system is heavily loaded.

The management port is a Layer 3 port in host mode, and only accepts traffic that terminates on the router. This port does not route packets between itself and other ports. The port processes only the following packet types and properly enqueues them:

• Address Resolution Protocol (ARP)

• IPv4 unicast

• IPv6 unicast

• Cisco Discovery Protocol (CDP)

• Link Layer Discovery Protocol (LLDP)

The Mini USB 2.0 Type B console port functions as a second console connection to the route processor. The USB console port connection uses a Mini USB 2.0 cable. The USB console interface speed is same as the RJ-45 console interface speed.

Windows computers require a driver for the USB port. Before using the USB port, you must download the required driver to your computer from https://software.cisco.com/download/release.html?mdfid=282979369&softwareid=282855122&release=3.1

By default, USB-prefer mode is enabled for the port; but it can be overridden using the command-line interface (CLI). When this port is in the USB-prefer mode, the RJ-45 console port will be disabled, if both the ports are connected. For more information on using the CLI to configure the USB console interface, see the Catalyst 6500 Software Configuration Guide.

The USB 2.0 Type A port (disk0) is the only external storage interface for this switch. The port is connected to the route processor, which allows the Cisco IOS software to access the port. The port supports Cisco USB flash drives with capacities from 128 MB to 8 GB (USB devices with port densities of 128 MB, 256 MB, 1 GB, 4 GB, and 8 GB are supported). Cisco IOS software provides standard file system access to the flash device: read, write, erase, and copy. The software also provides the ability to format the flash device with a FAT file system (FAT32 and FAT16).

The console port is an RJ-45 port that provides universal asynchronous receiver/transmitter (UART) support to access the route processor with a serial console running at 9600 baud rate with 8 bits for data, no parity bit, and 1 stop bit.

This recessed access button is used to reset the system. Pressing the button brings down the route processor.

The fan tray is responsible for cooling the entire chassis and interfacing with environmental monitors to trigger alarms when conditions exceed thresholds. The fan tray supports Online Insertion and Removal (OIR).

The fan tray contains four high-efficiency fans with variable speed settings and thermal sensors. If one fan fails, the speed of the others is increased and a minor alarm is triggered. If a major fan tray failure occurs, the system is shut down. The individual fans are not field replaceable; the entire fan tray must be replaced in the event of a major fan tray failure. See Removing the Fan Tray for additional information about the fan.

You can use the switch LEDs to monitor switch activity and performance. You can also monitor the status of the fan tray assembly, and the power supplies.