These log messages refer to the GRE (GRE events) category.
2.25.1. failed_to_setup_gre_tunnel (ID: 02200001)
- Default Severity
- WARNING
- Log Message
- Failed to setup open tunnel from <local_ip> to <remote_ip>
- Explanation
- Unable to setup GRE tunnel with endpoint.
- Firewall Action
- drop
- Recommended Action
- Check CONN usage and local routing.
- Revision
- 1
- Parameters
- local_ip
remote_ip
2.25.2. gre_bad_flags (ID: 02200002)
- Default Severity
- WARNING
- Log Message
- GRE packet with bad flag(s). Packet dropped
- Explanation
- Received GRE packet with a bad flag combination.
- Firewall Action
- drop
- Recommended Action
- Check GRE endpoint configuration.
- Revision
- 1
- Context Parameters
- Packet Buffer
2.25.3. gre_bad_version (ID: 02200003)
- Default Severity
- WARNING
- Log Message
- GRE packet with bad version (not 0). Packet dropped
- Explanation
- Received GRE packet with bad version.
- Firewall Action
- drop
- Recommended Action
- Check GRE endpoint configuration.
- Revision
- 1
- Context Parameters
- Packet Buffer
2.25.4. gre_checksum_error (ID: 02200004)
- Default Severity
- WARNING
- Log Message
- GRE packet with checksum error. Packet dropped
- Explanation
- Received GRE packet with checksum errors.
- Firewall Action
- drop
- Recommended Action
- Check network equipment for errors.
- Revision
- 1
- Context Parameters
- Packet Buffer
2.25.5. gre_length_error (ID: 02200005)
- Default Severity
- WARNING
- Log Message
- GRE packet length error. Packet dropped
- Explanation
- Received GRE packet with length error.
- Firewall Action
- drop
- Recommended Action
- Check GRE endpoint configuration.
- Revision
- 1
- Context Parameters
- Packet Buffer
2.25.6. gre_send_routing_loop_detected (ID: 02200006)
- Default Severity
- WARNING
- Log Message
- Routing loop detected. GRE packet send failed
- Explanation
- Routing loop to the GRE endpoint detected.
- Firewall Action
- drop
- Recommended Action
- Check local routing.
- Revision
- 1
- Context Parameters
- Packet Buffer
2.25.7. unmatched_session_key (ID: 02200007)
- Default Severity
- WARNING
- Log Message
- Received GRE packet with unmatched session key. Packet dropped
- Explanation
- Received GRE packet with unmatched session key.
- Firewall Action
- drop
- Recommended Action
- Check GRE session key settings on the remote gateway.
- Revision
- 1
- Parameters
- session_key
- Context Parameters
- Packet Buffer
2.25.8. gre_routing_flag_set (ID: 02200008)
- Default Severity
- WARNING
- Log Message
- Received GRE packet with routing flag set. Packet dropped
- Explanation
- Received GRE packet with unsupported routing option enabled.
- Firewall Action
- drop
- Recommended Action
- Check GRE configuration on remote gateway.
- Revision
- 1
- Context Parameters
- Packet Buffer
cOS Core 15.00.01 Log Reference Guide
