04-22-2017 06:03 AM
Is it a pass through GRE or a GRE tunneling on the firewall itself?
For pass through GRE use d"debug flow basic " with proper flow filters.
For Gre generic tunneling, please use " debug gt gre " option
Hope it helps your requirement.
04-22-2017 06:14 AM
Looking through the ScreenOS 6.3 Concepts and Examples guide, the only mention of using GRE is when bound to tunnel interfaces on the device. So I believe you only can use this with GRE over IPSEC as a result.
Senior IP Engineer - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP)
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