IBM 2109 Service Guide - Page 22

Ethernet connection, Front panel LED port indicators

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Table 2. Control buttons Control buttons Description Down The Down button scrolls down the command list; or, if the user is changing a numeric display, it decrements the numeric value. Up The Up button scrolls up the command list; or, if the user is changing a numeric display, it increments the numeric value. Tab/Esc The Tab/Esc button tabs through multiple options. When displaying a menu item, pressing the Tab/Esc button reverses through previous commands. If pressed repeatedly, it turns off the front panel display. Enter The Enter button accepts the input and executes the selected function. When entering a number, the Up and Down buttons start in the slow mode and change to the fast mode if either button is held down. Most numbers go to a maximum of 255; for large numbers, it may be faster to use the Down button. Ethernet connection Connecting an existing Ethernet 10BASE-T or 100BASE-T LAN to the switch through the front panel RJ-45 connector gives you access to the internal SNMP agent of the switch and also allows Telnet and Web access for remote monitoring and testing. The IP address is changed using the Ethernet port. Note: The connection is only for Telnet, SNMP agent, and the Web-based server access. This connection uses no fabric connection. Front panel LED port indicators Each switch port has an LED indicator. A properly functioning port with no GBIC installed has no LED light. A yellow port indicator depicts faults and problems. The LED color and flash speed of each port, as described in Table 3, indicates the status of each individual port. Table 3. Front panel LED status indicators Front panel LEDs Definition No light showing No light or signal carrier (no module, no cable) for media interface LEDs. Steady yellow Receiving light or signal carrier, but not yet online. Slow yellow Disabled (as a result of diagnostics or a portDisable command). Flashes every 2 seconds. Fast yellow Error, fault with a port. Flashes every one-half second. Steady green Online (connected with a device over a cable). Slow green Online, but segmented (loopback cable or incompatible switch). Flashes every 2 seconds. Fast green Internal loopback (diagnostic). Flashes every one-half second. Flickering green Online and frames flowing through port. When a GBIC is installed and a cable is connected to a properly functioning fibre-channel device, the LED indicator is a steady green. If a slow green flash is observed, it indicates that the port is seeing light, but cannot make a proper fabric connection. This could indicate that a loop back cable is installed, the fabric is 6 IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide

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Table 2. Control buttons
Control
buttons
Description
Down
The Down button scrolls down the command list; or, if the user is changing
a numeric display, it decrements the numeric value.
Up
The Up button scrolls up the command list; or, if the user is changing a
numeric display, it increments the numeric value.
Tab/Esc
The Tab/Esc button tabs through multiple options. When displaying a menu
item, pressing the Tab/Esc button reverses through previous commands. If
pressed repeatedly, it turns off the front panel display.
Enter
The Enter button accepts the input and executes the selected function.
When entering a number, the Up and Down buttons start in the slow mode and
change to the fast mode if either button is held down. Most numbers go to a
maximum of 255; for large numbers, it may be faster to use the Down button.
Ethernet connection
Connecting an existing Ethernet 10BASE-T or 100BASE-T LAN to the switch
through the front panel RJ-45 connector gives you access to the internal SNMP
agent of the switch and also allows Telnet and Web access for remote monitoring
and testing. The IP address is changed using the Ethernet port.
Note:
The connection is only for Telnet, SNMP agent, and the Web-based server
access. This connection uses no fabric connection.
Front panel LED port indicators
Each switch port has an LED indicator. A properly functioning port with no GBIC
installed has no LED light. A yellow port indicator depicts faults and problems.
The LED color and flash speed of each port, as described in Table 3, indicates the
status of each individual port.
Table 3. Front panel LED status indicators
Front panel LEDs
Definition
No light showing
No light or signal carrier (no module, no cable) for media interface
LEDs.
Steady yellow
Receiving light or signal carrier, but not yet online.
Slow yellow
Disabled (as a result of diagnostics or a
portDisable
command).
Flashes every 2 seconds.
Fast yellow
Error, fault with a port. Flashes every one-half second.
Steady green
Online (connected with a device over a cable).
Slow green
Online, but segmented (loopback cable or incompatible switch).
Flashes every 2 seconds.
Fast green
Internal loopback (diagnostic). Flashes every one-half second.
Flickering green
Online and frames flowing through port.
When a GBIC is installed and a cable is connected to a properly functioning
fibre-channel device, the LED indicator is a steady green. If a slow green flash is
observed, it indicates that the port is seeing light, but cannot make a proper fabric
connection. This could indicate that a loop back cable is installed, the fabric is
6
IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide