Cisco Systems CISCO1841-HSEC/K9-RF manual Summary of Cisco 1800 Series LED Indicators

Chapter 2 Overview of Cisco 1800 Series Routers (Modular)

Hardware Features

•Boot/NVRAM—Serves two functions. It stores the ROM monitor, which allows you to boot an operating system software image from flash memory. It also stores the system configuration file and the virtual configuration register.

Table 2-3lists the memory specifications for Cisco 1800 series routers.

Table 2-3 Router Memory Specifications for the Cisco 1841 Router

Description	Specification
SDRAM	128 MB, expandable to 384 MB; default is 128 MB
Flash memory	32, 64, or 128 MB; default is 32MB
Boot/NVRAM	2/4 MB flash memory

Note SDRAM and the flash memory are user-upgradable, but the boot/NVRAM is permanently soldered to the router’s motherboard and is not upgradable.

Table 2-4 Router Memory Specifications for the Cisco 1861 ISR

Description	Specification
DRAM	512 MB
Flash memory	128 MB

LED Indicators

Table 2-5summarizes the LED indicators for the Cisco 1841 router that are located in the router bezel or chassis, but not in the interface cards.

For descriptions of the LEDs in the interface cards, see Cisco Interface Card Installation Guide.

		Table 2-5	Summary of Cisco 1800 Series LED Indicators
		LED		Color	Description	Location:
		SYS PWR		Green	Router has successfully booted and the software is functional.	Front
					This LED blinks while booting or in the ROM monitor.
		SYS ACT		Green	Blinking when any packets are transmitted or received on any	Front
					WAN or LAN, or when monitoring system activity.
		CF		Green	On when flash memory is busy. Do not remove the CompactFlash	Back
					memory card when this light is on.
		FDX (FE 0/0)		Green	On indicates full-duplex operation. Off indicates half-duplex	Back
					operation.
		100 (FE 0/0)		Green	On indicates a 100-Mbps link. Off indicates a 10-Mbps link.	Back
		Link (FE 0/0)		Green	On when the router is correctly connected to a local Ethernet	Back
					LAN through Ethernet port 0.
		FDX (FE 0/1)		Green	On indicates full-duplex operation. Off indicates half-duplex	Back
					operation.
	Cisco 1800 Series Routers (Modular) Hardware Installation Guide
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