Troubleshooting Tip: Exceptional table in hyperscale FortiGate

[kyozloveyou_FTNT]

Description	This article describes the function of the exceptional table and how to check the counters.
Scope	FortiGate with Hyperscale enabled.
Solution	In the hyperscale environment, there is an exceptional table. The exceptional table shows the count of exceptional packets. The exceptional packet refers to ICMP unreachable, MTU too large (fragmentation required) messages, and other types of packets across the ICMP, TCP, and UDP protocols. The exceptional table can be checked by running the following command: HOSTNAME (global) # fnsysctl cat /proc/net/np7/excp SSE_TTLCHKF (4 ):5513 SSE_FRAGPKT (6 ):108 IHP_L4CHKFAIL (22 ):182 IHP_L4APSFAIL (25 ):11673 PLE_NOT_SYN (72 ):7833870 L2P_FRAG_EXCP (80 ):589841 L2P_SSE_INFO_FAIL (82 ):140367 icmp_err_handle_nr:1301097 icmp_err_sess_search_nr:1114049 icmp_err_sess_cb_nr:1114049 icmp_err_sess_miss_nr:244502 icmp_err_sent_nr:1033041 icmp_err_fast_nr:60796 icmp_err_pkt_drop_nr:268056 large_pkt_count_nr:17 large_pkt_sess_search_nr:17 large_pkt_sess_cb_nr:17 large_pkt_processed_nr:17 frag_pkt_count_nr:589841 frag_pkt_process_nr:301721 frag_pkt_xmit_nr:288103 ttl_check_fail_handle_nr:5513 sess-stats: 3168/429598 Note: The counters will keep increasing until the FortiGate reboots.