46 PowerConnect B-Series FCX Configuration Guide53-1002266-01Configuring basic port parameters2 Chassis-based and Stackable devicesNOTEThe following procedure applies to Stackable devices and to Chassis-based 100/1000 Fiberinterface modules only. The CLI syntax for enabling and disabling 100BaseFX support on thesedevices differs than on a Compact device. Make sure you refer to the appropriate procedures.PowerConnect devices support the following types of SFPs for 100BaseFX:• Multimode SFP – maximum distance is 2 kilometers• Bidirectional single mode SFP – maximum distance is 10 kilometers• Long Reach (LR) – maximum distance is 40 kilometers• Intermediate Reach (IR) – maximum distance is 15 kilometersNOTEConnect the 100BaseFX fiber transceiver after configuring both sides of the link. Otherwise, thelink could become unstable, fluctuating between up and down states.To enable support for 100BaseFX on an fiber port or on a Stackable switch, enter commands suchas the following.PowerConnect(config)# interface ethernet 1/6PowerConnect(config-if-1/6)# 100-fxThe above commands enable 100BaseFX on port 6 in slot 1.Syntax: [no] 100-fxTo disable 100BaseFX support on a fiber port, enter the no form of the command. Note that youmust disable 100BaseFX support before inserting a different type of module In the same port.Otherwise, the device will not recognize traffic traversing the port.Changing the Gbps fiber negotiation modeThe globally configured Gbps negotiation mode is the default mode for all Gbps fiber ports. Youcan override the globally configured default and set individual ports to the following:• Negotiate-full-auto – The port first tries to perform a handshake with the other port toexchange capability information. If the other port does not respond to the handshake attempt,the port uses the manually configured configuration information (or the defaults if anadministrator has not set the information). This is the default.• Auto-Gbps – The port tries to perform a handshake with the other port to exchange capabilityinformation.• Negotiation-off – The port does not try to perform a handshake. Instead, the port usesconfiguration information manually configured by an administrator.To change the mode for individual ports, enter commands such as the following.PowerConnect(config)# interface ethernet 1 to 4PowerConnect(config-mif-1-4)# gig-default auto-gigThis command overrides the global setting and sets the negotiation mode to auto-Gbps for ports 1– 4.Syntax: gig-default neg-full-auto | auto-gig | neg-off
