router backup config to tftp server shows 0 kbytes
Hello, Quite recently we changed our tftp server for voice g/w backups to another server running win 7. We are using tftp32 as tftp client and a rule has been added under windows firewall. Files are backingup to the new server but for most of the gateways the size of that files are 0kb......but some gateways are backingup correctly.
We have tested in around 40 gateways....in that only 4 or 5 gateways are backing up correctly. Any comments ?
The router by default will use the IP address nearest to the TFTPSERVER.
So the router could have say 4 addresses
! loopback 0 desc ** ALWAYS UP FOR MANAGEMENT ETC *** ip add 10.100.100.100 255.255.255.255 ! int fas 0/0 desc *** LAN TO CORE SW A *** ip add 172.16.1.100 255.255.255.0 ! int fas 0/1 desc *** LAN TO CORE SW B *** ip add 172.16.1.200 255.255.255.0 ! int ser 0/0/0 desc *** WAN LINK TO HQ BUILDING *** ip add 192.168.100.254 255.255.255.252 !
Lets say the Ip route to the TFTPSERVER is via the SER 0/0/0 port to the HQ building.
The router will use IP address 192.168.100.254 as it source for TFTP transaction.
The TFTPSERVER may not be able to ping or IP route to 192.168.100.254 but can route/ping say the loopback address 10.100.100.100
You would overcome this on the router by adding the following command in the global config:-
! ip tftp source-interface loop 0 !
Have a look at what address you think you should be using to source you TFTP packets. Make sure the TFTPSERVER can ping that address. add the config line to suit and retest
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