Model: ASG320
Firmware version: 7.501
operation mode: HA
Existing Site-to-site VPN / IPSec stops working.
Under "Site-to-site VPN" the status-light is red
and it shows "Error: No connection".
Under "Support, Tools, Ping Check" I can ping the
remote VPN-Gateway.
The connection between the two VPN-Gateways
is working and there are no other paketfilters between them.
When I go under "Site-to-site VPN, IPSec" and "disable, wait, enable"
the broken VPN-connection, it is not going to work again.
Other "Site-to-site VPNs" work fine.
When I switch to the other ASG (Management, High Availability, Shutdown),
all "Site-to-site VPNs" are working again.
The problem comes back after a few days.
Different "Site-to-site VPNs" with different remote VPN-Gateways
(ASG 7.501 or Juniper SSG-140) stop working and are not resettable.
One assumption is, that massive network load (backupjobs) generate
this problem. There were high peaks under "Reporting, Network Usage"
before the VPN-problem once occured.
In the logfiles I could not find a hint till now.
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