The direct update from kernel 2.6 to 3.10 is unfortunately not possible. Fresh install the gateways with R80.30 kernel 3.10.
I would proceed as follows on both gateways:
1) Create a snapshot via clish
> add snapshot 8010
> set snapshot export R8010 path /var/log name R8010
2) Download the snapshot via winscp (/var/log/R8010)
3) Export the GAIA config via clish
> save configuration gwconfig.txt
4) Download the config via winscp to your PC
5) Install an new R80.30 gateway with 3.10 kernel
6) Install the latest R80.30 JHF (sk153152)
7) Upload the gwconfig.txt file to the new gateway
8.) Import the config
> set clienv on-failure continue
> load configuration config.txt
> set clienv on-failure stop
> save config
9) Reboot the gateway
10) Creat a new SIC with the gateway via SmartConsole and cpconfig
11) Install the license via SmartConsole
12) You may have to backup and restore some of the usual files on the gateways:
$FWDIR/boot/modules/fwkern.conf -> Firewall stettings
$FWDIR/conf/discntd.if -> Disconnected interfaces
$FWDIR/conf/trac_client_1.ttm -> SecureClient settings
13) Change the version from R80.10 to R80.30 and install the policy
>>> Perform the same steps on the second gateway.
14) Check with cpconfig the CoreXL settings on both gateways. The same core number should be set here.
That should be it:-)
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