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Menus Reference Manual: Load FLASH Set-Up Menu
The TFTP Load Flash operation may be aborted by re-connecting to the console of the router and choosing the Abort
Load option from the Load FLASH Set-Up menu. This will cause the router to reset and return to normal operations
operating from the existing software.
Considerations:
When the router is placed in Network (TFTP) load mode, the router will restart and then remain idle.
In the following diagram of a cluster of routers, when upgrading the three routers in the diagram, the upgrade order
should be Router C, then Router B, and finally Router A.
A TFTP software load to router Router C would be performed as follows:
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Using TFTP, get config.txt from each router and save.
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Telnet to Router C. Enter the ID or alias of Router B in the Network (TFTP) option to put Router C in
Network Load mode. When Router C restarts in Network Load mode, the connection to "Router B" will be
re-established only if autocall is enabled on router B.
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The TFTP transfer of the upgrade code may now be performed from the PC to Router C. Once
Router C has completed programming the flash and has restarted in operational mode, the connection to
Router B will be re-established only if autocall is enabled on router B.
Once router C is operating with the new software, the PC may be used to reload the config.txt file back to Router C.
Repeat for Router B, then again for Router A. Perform the Router B upgrade using the ID or alias of Router A.
Router A upgrades would not require a remote site ID as the PC used for TFTP transfers is located on the same
LAN as Router A.
Link 1
Router B
Link 2
Router A
Router C
23
PC used for
TFTP transfers
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