Cisco3825 上板载SFP端口的使用问题

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