Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 233

Chapter 18 Connecting Cisco EtherSwitch Service Modules
Table 18-2 Port Speed and Duplex
Port Function
Speed
Duplex
SFP Modules
The Cisco EtherSwitch service module supports Gigabit Ethernet SFP modules for fiber-optic
connections. These laser optical transceiver modules are field-replaceable, and you can insert them into
an SFP module slot. You use fiber-optic cables with LC connectors to connect to an SFP module. You
can use the SFP modules for gigabit uplink connections to other devices.
The SFP modules support 850- to 1550-nm nominal wavelengths.
The Cisco StackWise EtherSwitch service module and the 48-port Cisco EtherSwitch service module
have one or two SFP module slots into which you can install these SFP module types:
•
•
•
•
•
•
For more information about SFP modules, see the Cisco Network Modules Hardware Installation Guide
at the following URL:
http://www.cisco.com/en/US/products/hw/modules/ps2797/products_module_installation_guide_book
09186a00802d2910.html
OL-2485-20
Explanation
The operating speed of the switch port. You can choose Auto (autonegotiation) if the
connected device can negotiate the link speed with the switch port.
The default settings are:
Auto for the external 10/100-Mbps Fast Ethernet ports
•
Auto for the external Gigabit Ethernet RJ-45 (10/100/1000-Mbps) ports
•
• 1000 Mbps for the SFP module ports
The duplex mode of the switch port. Choose from one of the following:
Auto (autonegotiation) if the connected device can negotiate with the switch
•
Full (full duplex) if both devices can send data at the same time
•
Half (half duplex) if one or both devices cannot send data at the same time
•
The default settings are:
• Auto for the external 10/100-Mbps Fast Ethernet ports
• Auto for the external Gigabit Ethernet RJ-45 (10/100/1000-Mbps) ports
• Full for the 1000-Mbps ports (SFP)
You cannot set the port to half duplex if the port speed is set to Auto.
Note
1000BASE-CWDM
1000BASE-LH
1000BASE-LX
1000BASE-SX
1000BASE-T
1000BASE-ZX
Cisco EtherSwitch Services Modules
Cisco Network Modules Hardware Installation Guide
18-7