Cisco 3850 switch- Unable to upload IOS from tftp server
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07-15-2020 02:14 AM
I am trying to upgrade IOS in Cisco 3850 switch from the tftp server.
Currently running IOS Version: (cat3k_caa_universalk9-m) version 03.06.06E
Trying to upgrade to : cat3k_universalk9.16.09.05.spa.bin
When I am trying to copy the iOS from the tftp server using the command " copy tftp: flash: " it started copying but it ends with following error " line time expired "
I am using SSH
Following are the configuration:
Line con 0
exec-timeout 0 0
no exec
line aux 0
transport output none
stopbits 1
Line vty 0 4
access-class 1 in
exec-timeout 0 0
transport input ssh
transport output ssh
line vty 5 15
access-class 1 in
exec-timeout 0 0
transport input ssh
transport output ssh
Please help me with valuable solution
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07-15-2020 02:25 AM
Hi there,
Use a different protocol like SFTP or SCP for file transfers. If you really are stuck using TFTP then increase the transfer block size:
! ip tftp blocksize 8192 !
..and re-attempt the tranfer.
cheers,
Seb.
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07-15-2020 02:48 AM
Thanks for your response. I will try and let you know
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07-16-2020 09:51 PM
I have upgraded the tftp server to tftpd64 4.64 and increased the blocksize of tftp to 4096 still not able to upload the IOS
Please help me with any other suggestion.
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07-16-2020 11:56 PM
Check the tftp server's logs just after the update is attempted.You may find additional info.
M.
-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '
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07-15-2020 02:35 AM
- Also , if you are stuck with TFTP check the tftp server's logs. You may find additional info.
M.
-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '
