Cisco3825 上板载SFP端口的使用问题

midea2

　　By bob chen
　　2011．9.22
　　现象：
　　Cisco3825 固化2个GE，1个SFP
　　做配置的时候只能看到Gi0/0和Gi0/1 2个端口，3个口能同时用吗？
　　Table 3. Performance and System Characteristics of the Cisco 3800 Series
　　Description
　　Specification
　　Flash Memory (Compact Flash)
　　64 MB (default), with 128 MB, 256 MB and 512 MB upgrade options
　　System Memory (double data rate synchronous dynamic RAM [DDR-SDRAM] with Error-Correcting Code [ECC])
　　256 MB (default), with 512 MB, 768 MB, and 1 GB upgrade options
　　NME Slots
　　? Cisco 3825: Two NME slots
　　? Cisco 3845: Four NME slots
　　Integrated LAN Ports
　　Two 10/100/1000BASE-T (RJ-45)
　　Integrated HWIC Slots
　　Four
　　Onboard AIM Slots (internal)
　　Two
　　USB Port
　　Two
　　Console Port
　　One (up to 115.2 kbps)
　　Auxiliary Port
　　One (up to 115.2 kbps)
　　Integrated SFP Slots
　　One
　　Redundant Power Supply Support (optional)
　　? Cisco 3825: External AC or AC-IP using Cisco RPS 675 Redundant Power System
　　? Cisco 3845: Internal AC, AC-IP, or DC
　　Phone Power
　　? 360W integrated inline power supply
　　? Cisco 3825: Supports one AC-IP phone power supply for non-redundancy, and Cisco RPS 675 for redundancy
　　? Cisco 3845: Supports one AC-IP phone power supply for non-redundancy, or two for redundancy
　　Rack Mounting
　　19 in. standard and NEBS/ETSI option
　　查思科官网说明
　　板载SFP端口和gi0/0只能二选一复用
　　启用光纤端口配置如下
　　Cisco3825(config)#interface gigabitEthernet 0/0
　　Cisco3825(config-if)#media-type SFP
　　ONBOARD GIGABIT ETHERNET PORTS
　　Q. How many Gigabit Ethernet ports are there on Cisco 3800 Series systems?
　　A. There are two Gigabit Ethernet ports on Cisco 3800 Series systems. Port 1 is a fixed 10/100/1000BASE-T RJ-45. Port 0 can choose between 10/100/1000BASE-T RJ-45 and an SFP module slot. SFP modules are optional.
　　Q. How can I choose between the RJ-45 and SFP module slot in Gigabit Ethernet Port 0?
　　A. A new command-line interface (CLI) allows you to choose between the two media types. The "SFP" option will only come up if there is a SFP module plugged into the slot. RJ-45 is the default.
　　Cisco3825#conf t
　　Enter configuration commands, one per line. End with CNTL/Z.
　　Cisco3825(config)#interface gigabitEthernet 0/0
　　Cisco3825(config-if)#media-type ?
　　rj45 Use RJ45 connector
　　sfp Use SFP connector