Cisco CRS-1 - Carrier Routing System Router - Page 246

B-2
Cisco CRS-1 Carrier Routing System to Cisco CRS-3 Carrier Routing System Migration Guide
OL-13669-03
Appendix B Cisco CRS-1 to Cisco CRS-3 Upgrade Decision Trees
Figure B-1 Upgrading from Cisco IOS XR software Releases Earlier Than Release 3.8 to
Cisco IOS XR software Release 4.0.1
disk0: 4G
FAT16
2G/2G
rommon2.01
PIE upgrade to
3.8.4/3.9.2
FAT16FAT32
(via CLI)
3.5G/0.5G
rommon2.01
PIE upgrade
to 3.8.4/3.9.2
rommon2.01
PreStaged
Flash or RP
rommon2.01
PreStaged
Flash or RP
rommon2.01
then turboboot
Migrate
to 4G
mandatory
Migrate
to 4G
recommended
disk0: 2G
FAT16
Keep 2G card
Keep FAT16
FPD auto-upgrade
PIE upgrade
to 4.0.1-px
FPD auto-upgrade
PIE upgrade
to 4.0.1-px
FPD auto-upgrade
PIE upgrade
to 4.0.1-px
FPD auto-upgrade
PIE upgrade
to 4.0.1-px
FAT16FAT32
(via CLI)
3.5G/0.5G
FAT16FAT32
(via CLI)
3.5G/0.5G
Package install
FPD upgrade
(reload line cards)
FPD upgrade
(reload line cards)
FPD upgrade
(reload line cards)
disk0: 1G
FAT16
XR<3.8.0
rommon≤1.48
Reload
Before 3.8.0
PIE upgrade
to 4.0.1-px
isn’t supported
246177
Prior to this operation
-create directory in bootflash:
-copy MBI 4.0.1-px image
During operation
-change BOOTVAR
Supported but we
don’t recommend to
keep 2G flash cards
Supported but we don’t
recommend to keep FAT16