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FortiSwitch discovers the FortiGate using CapWap port 5246 and the Capwap process name responsible for FortiSwitch is cu_swtpd
Below is the discovery process on the FortiSwitch.
FortiSwitch# diagnose debug application cu_swtpd -1
00094.011 msgType : 1 DISCOVERY_REQ
00094.012 seqNum : 6
00094.014 msgElemLen : 213
00094.016 flags : 0
00094.020 intf internal, vd:root, opmode:NAT, type:0, mode:1, ifIdx: 23 ip 10.255.1.2 ipv6 ::
00094.022 cw_bmcast_send_intf send 268/268 bytes through intf internal
00094.032 cwAddTimer: CWTMR_DISCOVERY_INTERVAL Id 17 T 1s with fire time 95
00094.034 CWWS_DISCOVERY_enter 531: cwAddTimer DiscoveryInterval success.
00094.041 cw_rx_pktinfo 107B 10.255.1.1:5246 -> 10.255.1.2
00094.057 CAPWAP Control Header Dump:
00094.060 msgType : 2 DISCOVERY_RESP
00094.067 cwWtpProcPlainCtlMsg: received DISCOVERY_RESP from 10.255.1.1/5246
00095.030 CWWS_DTLS_SETUP_enter 1165: cwAddTimer WaitDTLS success.
00095.032 cwDtlsSslInitClient: Client Certificate
00095.763 cwDtlsMsgCbFn: [incoming] TLS 1.2 Handshake [length 5917 (0x171d)], Certificate
00095.961 cwDtlsInfoCbFn State 1001 ret 1 ssl->state 8 StatePtr SSLv3/TLS read server certificate request
00095.963 cwDtlsMsgCbFn: [incoming] TLS 1.2 Handshake [length 12 (0x000c)], ServerHelloDone
00096.045 FSM WTP -> AC (10.255.1.1/5246) State: CWWS_DTLS_SETUP (5) connect 3 live 1 dbg ffffffff Pkts 0 0
00096.057 FSM: old CWWS_DTLS_SETUP(5) ev CWWE_DTLS_PEER_ID_RECV(10) new CWWS_DTLS_AUTHORIZE(6)
00096.066 FSM: old CWWS_DTLS_AUTHORIZE(6) ev CWWE_DTLS_AUTH_PASS(13) new CWWS_DTLS_CONN(7)
00096.075 FSM: old CWWS_DTLS_CONN(7) ev CWWE_DTLS_ESTABLISHED(15) new CWWS_JOIN(9)
00096.077 cwWtpSendJoinReq: sending JOIN REQ msg.
00096.317 FSM: old CWWS_JOIN(9) ev CWWE_JOIN_RESP_RC_SUCC_IMAGE_SAME(23) new CWWS_CONFIG(11)
00096.335 CWWS_CONFIG_enter 1495: cwDelTimer WaitDTLS success.
00096.337 CWWS_CONFIG_enter: ver=FWF60F-v7.4-build2662 major=7 minor=4 opt=1
00096.385 cwWtpSendCfgStatusReq: sending CFG STATUS REQ msg.
00096.565 FSM: old CWWS_CONFIG(11) ev CWWE_CONFIG_STATUS_RESP_SUCC(36) new CWWS_DATA_CHECK(12)
00096.565 FSM: old CWWS_CONFIG(11) ev CWWE_CONFIG_STATUS_RESP_SUCC(36) new CWWS_DATA_CHECK(12)
00096.566 CWWS_DATA_CHECK_enter CONFIG_STATUS_RESP change EchoInterval 30 MaxDiscoveryInterval 5
00096.578 CWWS_DATA_CHECK_enter CONFIG_STATUS_RESP change ReportInterval 30
00096.754 FSM: old CWWS_DATA_CHECK(12) ev CWWE_CHANGE_STATE_EVENT_RC_SUCC(39) new CWWS_RUN(13)
00097.914 FSM WTP -> AC (10.255.1.1/5246) State: CWWS_RUN (13) connect 3 live 1 dbg ffffffff Pkts 0 0
00097.109 FSM: old CWWS_RUN(13) ev CWWE_CFG_UPDATE_REQ_RECV(41) new CWWS_RUN(13)
00097.111 CWWS_RUN_enter CFG_UPDATE_REQ change StatisticsTimer 120
00097.170 CWWS_RUN_enter: sending CFG UPDATE RESP msg.
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