It's look like:
Shuttle>> setenv gatewayip 192.168.1.1;
Shuttle> tftp 64000000 uImage3.18.1_7; tftp 60500000 uInitrd_w;
Wait GMAC to reset
Wait for PHY reset
PHY is IC+ IP1001LF
Wait for link to come up..........Link up
Wait for auto-negotiation to complete
Link is 1000M
TFTP from server 213.xx.xx.xx; our IP address is 192.168.1.20; sending through gateway 192.168.1.1
Filename 'uImage3.18.1_7'.
Load address: 0x64000000
Loading: *
ARP Resend request
T invalid RARP header
####T T ########T #T T #T #T ###T T ##T T ###T #######T T #T #T #T #T ######T T #T ###T ##T #T ##T T T T ###T #T #T T ##T #T T T T ##T #T T T T #T #T T #T T ##T T #T T T T T #
#T T T T ###T
Retry count exceeded; starting again
TFTP from server 213.xx.xx.xx; our IP address is 192.168.1.20; sending through gateway 192.168.1.1
Filename 'uImage3.18.1_7'.
Load address: 0x64000000
Loading: ##T T #T T ##T ##T T #T T #