Hi Everyone I'm trying to connect a Cisco Router (FastEthernet - 10/100Mbps) to an SFP (1000base-T) in Cisco Nexus 5K but it doesn't work. I can an error message "Ethernet1/30: Configuration does not match the port capability". Can someone point me in the right direction, please. Switch1# show int ethernet 1/30 capabilities Ethernet1/30   Model:                 N5K-C5548UP-SUP   Type (SFP capable):    1000base-T   Speed:                 1000,10000   Duplex:                full   Trunk encap. type:     802.1Q   Channel:               yes   Broadcast suppression: percentage(0-100)   Flowcontrol:           rx-(off/on),tx-(off/on)   Rate mode:             none   QOS scheduling:        rx-(6q1t),tx-(1p6q0t)   CoS rewrite:           no   ToS rewrite:           no   SPAN:                  yes   UDLD:                  yes   Link Debounce:         yes   Link Debounce Time:    yes   MDIX:                  no   Pvlan Trunk capable:   yes   TDR capable:           no   Port mode:             Routed,Switched   FEX Fabric:            yes   POE capable:           no Switch1# show int ethernet 1/030 transceiver Ethernet1/30     transceiver is present     type is 1000base-T     name is CISCO-METHODE     part number is SP7041-E     revision is E     serial number is MTC1631053P     nominal bitrate is 1300 MBit/sec     Link length supported for copper is 100 m     cisco id is --     cisco extended id number is 4 Switch1(config-if)# speed ?   100    100Mb/s   1000   1Gb/s   10000  10Gb/s   auto   Auto negotiate speed Switch1# config t Enter configuration commands, one per line.  End with CNTL/Z. Switch1(config)# interface Ethernet1/30 Switch1(config-if)#   speed 100 ERROR: Ethernet1/30: Configuration does not match the port capability. Switch1# show version Cisco Nexus Operating System (NX-OS) Software TAC support: http://www.cisco.com/tac Copyright (c) 2002-2011, Cisco Systems, Inc. All rights reserved. The copyrights to certain works contained herein are owned by other third parties and are used and distributed under license. Some parts of this software are covered under the GNU Public License. A copy of the license is available at http://www.gnu.org/licenses/gpl.html. Software   BIOS:      version 3.5.0   loader:    version N/A   kickstart: version 5.0(3)N2(1)   system:    version 5.0(3)N2(1)   power-seq: Module 1: version v1.0              Module 3: version v2.0   uC:        version v1.2.0.1   SFP uC:    Module 1: v1.0.0.0   BIOS compile time:       02/03/2011   kickstart image file is: bootflash:/n5000-uk9-kickstart.5.0.3.N2.1.bin   kickstart compile time:  6/13/2011 6:00:00 [06/13/2011 21:43:33]   system image file is:    bootflash:/n5000-uk9.5.0.3.N2.1.bin   system compile time:     6/13/2011 6:00:00 [06/13/2011 23:33:42] Hardware   cisco Nexus5548 Chassis ("O2 32X10GE/Modular Universal Platform Supervisor")   Intel(R) Xeon(R) CPU         with 8299528 kB of memory.   Processor Board ID FOC160160JN   Device name: Switch1   bootflash:    2007040 kB Kernel uptime is 583 day(s), 19 hour(s), 37 minute(s), 0 second(s) Last reset   Reason: Unknown   System version: 5.0(3)N2(1)   Service: plugin   Core Plugin, Ethernet Plugin Regards, Ram ... View more