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[ScreenOS] Unable to configure a VPN within a VSYS

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Article ID: KB26847 KB Last Updated: 15 Feb 2013Version: 1.0
Summary:
This article describes the issue of being unable to configure a VPN within a VSYS.
Symptoms:
When trying to configure a new IPsec SA within a VSYS, the firewall generates the following error message:
ISG(VSYS-A)-> set vpn "LAB" gateway  "Juniper" no-replay tunnel idletime 0 proposal "nopfs-esp-3des-md5" "nopfs-esp-3des-sha"

vpn_add(), cannot get vpn id. vpn number might reached limit.VPN: can't be added
VPN: can't be added

Failed command - set vpn "LAB" gateway "Juniper" no-replay tunnel idletime 0 proposal "nopfs-esp-3des-md5" "nopfs-esp-3des-sha"
ISG(VSYS-A)->
Cause:

Solution:
The number of VPNs per VSYS is hard coded. There is a per-Vsys limit on many features to prevent one VSYS from overcoming the rest of the firewall. Some of these limits are configurable and some are not. The number of VPNs per VSYS is one of the paramaters that cannot be configured.

The reason for the per vsys limit is to ensure that no one VSYS uses all of the available VPNs. To check the VPN limit per VSYS, use the get sys-cfg | include vpn command.
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