Cisco3825 上板载SFP端口的使用问题
By bob chen2011．9.22
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 with Error-Correcting Code )
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
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