Cisco CRS-1 - Carrier Routing System Router

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Cisco CRS-1 Carrier Routing System to Cisco CRS-3 Carrier Routing System Migration Guide
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Chapter 2 Downgrading Your Cisco CRS-3 Carrier Routing System Router Back to a Cisco CRS-1 Carrier Routing
System Router
Downgrading your Cisco CRS-3 Carrier Routing System 16-Slot Line Card Chassis Back to a Cisco CRS-1 Carrier
Routing System 16-Slot Line Card Chassis
| 23 | Up | Up | Up | 1 1 | |
| 24 | Up | Up | Up | 1 1 | |
| 25 | Up | Up | Up | 1 1 | |
| 26 | Up | Up | Up | 1 1 | |
| 27 | Up | Up | Up | 1 1 | |
| 28 | Up | Up | Up | 1 1 | |
| 29 | Up | Up | Up | 1 1 | |
| 30 | Up | Up | Up | 1 1 | |
| 31 | Up | Up | Up | 1 1 | |
+------------------------------------------------------------------------+
Location: 0/5/CPU0
Asic Instance: 1
Fabric Destination Address: 21
Retry period: 0 sec
Link Active bitmap (1=up,0=down): 0xffffffff
+------------------------------------------------------------------------+
|Link #|Driver state | FSDB state |Barrier state|Up (Drv Barr)| Errors |
+------------------------------------------------------------------------+
| 0 | Up | Up | Up | 2 2 | |
| 1 | Up | Up | Up | 2 2 | |
| 2 | Up | Up | Up | 2 2 | |
| 3 | Up | Up | Up | 2 2 | |
| 4 | Up | Up | Up | 1 1 | |
| 5 | Up | Up | Up | 1 1 | |
| 6 | Up | Up | Up | 1 1 | |
| 7 | Up | Up | Up | 1 1 | |
| 8 | Up | Up | Up | 1 1 | |
| 9 | Up | Up | Up | 1 1 | |
| 10 | Up | Up | Up | 1 1 | |
| 11 | Up | Up | Up | 1 1 | |
| 12 | Up | Up | Up | 1 1 | |
| 13 | Up | Up | Up | 1 1 | |
| 14 | Up | Up | Up | 1 1 | |
| 15 | Up | Up | Up | 1 1 | |
| 16 | Up | Up | Up | 1 1 | |
| 17 | Up | Up | Up | 1 1 | |
| 18 | Up | Up | Up | 1 1 | |
| 19 | Up | Up | Up | 1 1 | |
| 20 | Up | Up | Up | 1 1 | |
| 21 | Up | Up | Up | 1 1 | |
| 22 | Up | Up | Up | 1 1 | |
| 23 | Up | Up | Up | 1 1 | |
| 24 | Up | Up | Up | 1 1 | |
| 25 | Up | Up | Up | 1 1 | |
| 26 | Up | Up | Up | 1 1 | |
| 27 | Up | Up | Up | 1 1 | |
| 28 | Up | Up | Up | 1 1 | |
| 29 | Up | Up | Up | 1 1 | |
| 30 | Up | Up | Up | 1 1 | |
| 31 | Up | Up | Up | 1 1 | |
+------------------------------------------------------------------------+
Downgrading the Next Legacy Node
Now that plane 0 has been successfully downgraded, we should go back the repeat it for the next plane.
Follow steps 3.1.4 Administratively Disable the Fabric Plane. to 3.1.11 Verify Fabric Link Connectivity
for the next plane, until all 8 planes in the system are downgraded to CRS-1.