This config was working fine until we tried to uprgade the IOS. The SR520 was VPN'ing into a UC520.
I have an SR520W Ethernet to Ethernet router, we upgraded the software to 12.4.24.T2, the docs said it works for this platform, and after the reload it never came back up and we ended up in the ROMMON prompt. Apparently, something went wrong, yikes. The error was no boot file found or something like that. Anyway, we TFTPD'd 4.24.T2 back onto the router and it booted with that. We fortunately backed up our config using CCA, so we reloaded that, and then two things occurred, the Router would not longer get a DHCP address for the WAN side, and the WWLAN never turned on.
The original IOS was 12.4.15.something, so we reloaded 12.4.15.XZ2, and the WWLAN came back but, the WAN port still does not want to get a DHCP IP address. Also, the CCA complained that the remote VPN was "modified outside of CCA and would have to be removed by CCA and redone if we wanted to use CCA, so we removed that as well.
What IOS should we use (recommended) on this router; the docs state the entire above are ok.
How do we get the WAN port to grab a DHCP address again? PCs on that same side work fine.
Is there some issue in the backup and restore process that would rub-out the WWLAN, WAN, and VPN info in the router?
Please advise as now we have lost a phone at a remote sight...