Cisco Systems IGX 8400 Manual De Usuario
Trunk Cards 4-3
Common Alarms, Controls, and Indicators
Trunk Operating Modes
IGX trunk cards operate in either simple gateway or cell forwarding mode. Simple gateway supports
service interworking, which lets Frame Relay connections terminate at ATM endpoints. For a
description of simple and complex gateways, service and network interworking, tiered networks,
trunks, ATM protocols, and cell and header formats, refer to the Cisco Systems Overview.
service interworking, which lets Frame Relay connections terminate at ATM endpoints. For a
description of simple and complex gateways, service and network interworking, tiered networks,
trunks, ATM protocols, and cell and header formats, refer to the Cisco Systems Overview.
Trunk Card Maintenance
Trunk cards require no maintenance except for replacement after a confirmed failure.
Loopback Test
A trunk loopback test runs when an ATM trunk detects an integrated alarm. The loopback test
indicates if the line or the card is faulty. A loopback test “pass” means the line is faulty, so a line
alarm is subsequently indicated. A loopback test “fail” means the card is faulty. If the card is faulty,
a switch occurs to an available Y-cable equipped redundant card.
indicates if the line or the card is faulty. A loopback test “pass” means the line is faulty, so a line
alarm is subsequently indicated. A loopback test “fail” means the card is faulty. If the card is faulty,
a switch occurs to an available Y-cable equipped redundant card.
Common Alarms, Controls, and Indicators
Front cards and back cards have faceplates with indicator LEDs. Most cards have both a green Active
LED and a red Fail LED at the bottom of the faceplate. For definitions of the port status LEDs on a
back card, refer to the section that describes the back card. Table 4-3 describes the common card
status indicators for LEDs.
LED and a red Fail LED at the bottom of the faceplate. For definitions of the port status LEDs on a
back card, refer to the section that describes the back card. Table 4-3 describes the common card
status indicators for LEDs.
Note
In slots where no back card exists, a blank faceplate must reside to block Electromagnetic
Interference (EMI) and Radio Frequency Interference (RFI) and to ensure correct air flow.
Table 4-3
Common Card Status Indicators
Indicators
Status
Meaning
Fail
ON Steady
Indicates an error occurred. First, reset the card with the resetcd f
command. If the LED comes on again, call the TAC.
command. If the LED comes on again, call the TAC.
Fail
Blinking
On an NPM in a redundant system, this combination indicates that
the card is being updated.
the card is being updated.
Active
ON steady
When steadily on, this combination indicates the card is active and
carrying traffic or processing data.
carrying traffic or processing data.
Active
ON momentarily
When momentarily on, indicates the card executed a self-test.
BOTH
OFF
Indicates the card is either part of a redundant pair and is in standby
or is not being used at all.
or is not being used at all.
BOTH
ON
Indicates the card failed but remains active because no standby card
is available. One or more lines failed, but others remain active.
is available. One or more lines failed, but others remain active.