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Nexus 3000 may fail to upgrade with 7.0(x) images with MD5Sum mismatch error
Only following platforms are susceptible to this issue N3K-C3064PQ-10GX N3K-C3132Q-40GX N3K-C3172TQ-10GT N3K-C3172PQ-10GE N3K-C3048TP-1GE Also, this issue is seen only when the switch is upgrading from 6.x to 7.x • e-USB needs to have a disk geometry of greater than 48 sectors/track as below N3K(config)# run bash fdisk -l /dev/sda | grep sectors 161 heads, 63 sectors/track, 1038 cylinders
In order to recover this device, tftp boot the image from loader prompt to 7.x image first and then downgrade to 6.x 1) break into loader prompt by Ctrl-L if the switch is in boot cycle 2) set ip ipaddress netmask 3) set gw gateway_ipaddress 4) boot tftp://tftp_server_ip/nxos.7.0.3.Ix.y.bin (boot 7.0.x release via tftp boot from loader) 5) write erase 6) write erase boot 7) copy _config startup-config 8) install all kickstart bootflash:n3000-uk9-kickstart.6.0.2.U6.x.bin system bootflash:n3000-uk9.6.0.2.U6.x.bin no-save bios-force (downgrade to 6.0.(2)U6(x))
This is not a hardware issue. http://www.cisco.com/c/en/us/support/docs/field-notices/642/fn64233.html
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