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