Dear all,
After trying an upgrade to the new 2.9.31 routing-test we decided again to downgrade to the last ‘half stable’ ospf in 2.9.27
But after downgrade ospf stopped in working properly without changing anything in configuration.
after a lot of try and errors i found out that the ‘routing filters’ where still inside the configuration with same syntax than before the upgrade, but don’t do anything anymore. manually deleting and retyping them didn’t suceed as well.
the only solution i found out, was re-updating to 2.9.31 with all it’s new routing trouble.
hope anybody knows a fix for this issue…
/system backup probably wouldn’t work as I think that backs up the raw configuration data (so any corruption is likely to remain intact within the backup), whereas /export reproduces the text commands you would need to type to reconfigure the device as it currently stands.
Or you could backup the configuration while it “works” on 2.9.31, and then NetInstall 2.9.27 on there while ONLY keeping the license and NOT the config (brand-new clean install of .27). Then restore your config.
If there is something lurking in the configuration that got changed under .31 so that it won’t work with previous versions after a downgrade, I would expect that either doing a “clean install” or a “system reset” would fix it.