Appendix A Troubleshooting
Reading the LEDs
Reading the LEDs
The following sections describe the LEDs on the router.
•Chassis LEDs
•T1/E1 Interface LEDs
Chassis LEDs
Table
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| LED |
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| Location | Description |
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| Copper GE Ports (from GE/FE Quad PHY) Contain Two LEDs each |
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| Solid Green |
| PHY | Link with no activity |
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| L |
| FLASH Green |
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| Link with activity |
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| Off |
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| No link |
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| Green |
| PHY | Speed 1000 |
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| S |
| Off |
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| off |
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| T1/E1 ports contain Two LEDs each |
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| Alarm |
| Off |
| WP2 | Not configured |
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| AL |
| Yellow |
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| Alarm Condition |
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| Active |
| Off |
| WP2 | Out of Service / Not configured |
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| C |
| Green |
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| Carrier Condition |
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| Copper GE (from Quad combo PHY) ports contain Two LEDS each |
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| Solid Green |
| PHY | Link with no activity |
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| L |
| FLASH Green |
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| Link with activity |
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| Off |
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| No link |
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| Green |
| PHY | Speed 1000 |
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| S |
| Off |
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| off |
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| System LED |
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| System |
| Off |
| HP | No power or unit not |
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| Alternating |
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| POST in progress |
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| Green/Off |
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| Solid Green |
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| System Healthy (normal |
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| operation) |
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| Solid Red |
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| System Faulty |
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| SFP LED |
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| SFP |
| Orange |
| HP | Link and Active Indicator |
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| Off |
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| Not Enabled |
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| Cisco ASR 901 10G Series Aggregation Services Router Hardware Installation Guide |
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