Junos s/w push from USB

KERN_ARP_ADDR_CHANGE: arp info overwritten for 10.10.60.40 from 00:1a:a1:ef:98:42 to 84:b5:9c:2e:1b:48
ugen0.4: <Generic> at usbus0
umass1: <Generic Mass Storage, class 0/0, rev 2.00/1.00, addr 4> on usbus0
umass1:  SCSI over Bulk-Only; quirks = 0x4101
umass1:1:1: Attached to scbus1
da1 at umass-sim1 bus 1 scbus1 target 0 lun 0

da1: <Generic Flash Disk 8.07> Removable Direct Access SPC-2 SCSI device
da1: Serial Number E1257CDD
da1: 40.000MB/s transfers
da1: 7680MB (15728640 512 byte sectors: 255H 63S/T 979C)
da1: quirks=0x2<NO_6_BYTE>
KERN_ARP_ADDR_CHANGE: arp info overwritten for 10.10.10.1 from 84:b5:9c:2e:1b:48 to 00:1a:a1:ef:98:42
KERN_ARP_ADDR_CHANGE: arp info overwritten for 10.10.10.1 from 00:1a:a1:ef:98:42 to 84:b5:9c:2e:1b:48

root@3400-:RE:0% ls /dev/

da1s1

root@3400-:RE:0% mount -t msdos /dev/da1s1 /var/tmp/usb
mount: Using "-t msdosfs", since "-t msdos" is deprecated.
root@3400-:RE:0%
root@3400-:RE:0% pwd
/var/home/joash

root@3400-:RE:0%
root@3400-:RE:0% cd /var/tmp/usb/
root@3400-:RE:0% ls
               junos-arm-32-15.1X53-D57.3.gz
root@3400-:RE:0% cp junos-arm-32-15.1X53-D57.3.gz /var/tmp/
root@3400-:RE:0% exit

> request system software add /var/tmp/junos-arm-32-15.1X53-D57.3.gz validate