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Hello,

We have a WS-26-400-AC set with two ports as part of an LACP link. Traffic stopped flowing over the link and I found this in the peer's(Arista) logs.

Code: Select all

 May 23 12:33:23 localhost Lldp: %LLDP-5-NEIGHBOR_TIMEOUT: LLDP neighbor with chassisId 5064.d12a.d074 and portId "Port 25" timed out on interface Ethernet49
May 23 12:33:23 localhost Lldp: %LLDP-5-NEIGHBOR_TIMEOUT: LLDP neighbor with chassisId 5064.d12a.d074 and portId "Port 26" timed out on interface Ethernet51
May 23 12:42:00 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId 5064.d12a.d074 and portId "Port 25" added on interface Ethernet49
May 23 12:42:00 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId 5064.d12a.d074 and portId "Port 26" added on interface Ethernet51
May 23 12:44:00 localhost Lldp: %LLDP-5-NEIGHBOR_TIMEOUT: LLDP neighbor with chassisId 5064.d12a.d074 and portId "Port 25" timed out on interface Ethernet49
May 23 12:44:00 localhost Lldp: %LLDP-5-NEIGHBOR_TIMEOUT: LLDP neighbor with chassisId 5064.d12a.d074 and portId "Port 26" timed out on interface Ethernet51
May 23 12:45:02 localhost CROND[31510]: (root) CMD (/etc/cron.hourly/logrotate)
May 23 12:46:49 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId 5064.d12a.d074 and portId "Port 25" added on interface Ethernet49
May 23 12:46:49 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId 5064.d12a.d074 and portId "Port 26" added on interface Ethernet51
May 23 12:48:32 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet49, changed state to down
May 23 12:48:33 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet51, changed state to down
May 23 12:48:33 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-Channel1 (Link to PoE distribution switch), changed state to down
May 23 12:48:33 localhost Stp: %SPANTREE-6-INTERFACE_DEL: Interface Port-Channel1 has been removed from instance MST0
May 23 12:48:34 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet51, changed state to up
May 23 12:48:34 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet49, changed state to up
May 23 12:48:41 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId ec13.b202.5762 and portId "Port 25" added on interface Ethernet49
May 23 12:48:41 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId ec13.b202.5762 and portId "Port 26" added on interface Ethernet51
May 23 12:48:42 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-Channel1 (Link to PoE distribution switch), changed state to up
May 23 12:48:42 localhost Stp: %SPANTREE-6-LOOPGUARD_CONFIG_CHANGE: Loop guard enabled on port Port-Channel1.
May 23 12:48:42 localhost Stp: %SPANTREE-6-INTERFACE_ADD: Interface Port-Channel1 has been added to instance MST0
May 23 12:48:43 localhost Stp: %SPANTREE-6-MSTP_REGION_BORDER_CLEARED: MSTP region border cleared on Port-Channel1
May 23 12:48:43 localhost Stp: %SPANTREE-6-INTERFACE_STATE: Interface Port-Channel1 instance MST0 moving from discarding to learning
May 23 12:48:43 localhost Stp: %SPANTREE-6-INTERFACE_STATE: Interface Port-Channel1 instance MST0 moving from learning to forwarding
May 23 12:48:54 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet49, changed state to down
May 23 12:48:54 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet51, changed state to down
May 23 12:48:54 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-Channel1 (Link to PoE distribution switch), changed state to down
May 23 12:48:54 localhost Stp: %SPANTREE-6-INTERFACE_DEL: Interface Port-Channel1 has been removed from instance MST0
May 23 12:49:08 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet51, changed state to up
May 23 12:49:09 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet49, changed state to up
May 23 12:49:22 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet49, changed state to down
May 23 12:49:23 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet51, changed state to down
May 23 12:49:23 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet49, changed state to up
May 23 12:49:25 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet51, changed state to up
May 23 12:49:38 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId ec13.b202.5762 and portId "Port 25" added on interface Ethernet49
May 23 12:49:38 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId ec13.b202.5762 and portId "Port 26" added on interface Ethernet51
May 23 12:49:39 localhost Ebra: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-Channel1 (Link to PoE distribution switch), changed state to up
May 23 12:49:39 localhost Stp: %SPANTREE-6-LOOPGUARD_CONFIG_CHANGE: Loop guard enabled on port Port-Channel1.
May 23 12:49:39 localhost Stp: %SPANTREE-6-INTERFACE_ADD: Interface Port-Channel1 has been added to instance MST0
May 23 12:49:39 localhost Stp: %SPANTREE-6-MSTP_REGION_BORDER_CLEARED: MSTP region border cleared on Port-Channel1
May 23 12:49:39 localhost Stp: %SPANTREE-6-INTERFACE_STATE: Interface Port-Channel1 instance MST0 moving from discarding to learning
May 23 12:49:39 localhost Stp: %SPANTREE-6-INTERFACE_STATE: Interface Port-Channel1 instance MST0 moving from learning to forwarding
May 23 12:50:08 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId 0000.0000.d074 and portId "Port 25" added on interface Ethernet49
May 23 12:50:08 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId 0000.0000.d074 and portId "Port 26" added on interface Ethernet51
May 23 12:51:09 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId 0000.0000.0000 and portId "Port 25" added on interface Ethernet49
May 23 12:51:09 localhost Lldp: %LLDP-5-NEIGHBOR_NEW: LLDP neighbor with chassisId 0000.0000.0000 and portId "Port 26" added on interface Ethernet51
May 23 12:51:38 localhost Lldp: %LLDP-5-NEIGHBOR_TIMEOUT: LLDP neighbor with chassisId ec13.b202.5762 and portId "Port 25" timed out on interface Ethernet49
May 23 12:51:38 localhost Lldp: %LLDP-5-NEIGHBOR_TIMEOUT: LLDP neighbor with chassisId ec13.b202.5762 and portId "Port 26" timed out on interface Ethernet51
May 23 12:52:47 localhost Lag+LacpAgent: %LACP-4-PARTNER_CHURN: LACP Partner Churn Detected on Ethernet49
May 23 12:52:47 localhost Lag+LacpAgent: %LACP-4-PARTNER_CHURN: LACP Partner Churn Detected on Ethernet51
May 23 12:52:50 localhost Lag+LacpAgent: %LACP-4-ACTOR_CHURN: LACP Actor Churn Detected on Ethernet49
May 23 12:52:50 localhost Lag+LacpAgent: %LACP-4-ACTOR_CHURN: LACP Actor Churn Detected on Ethernet51

I rebooted the WS-26-400-AC in order to get things back up and running before I looked at it's logs I don't have them to post here.

Thanks,
Richard

Please ensure you're on the latest firmware as there has been some major fixes regarding STP and LACP in the recent past that might be causing what you're seeing here.

It was running 1.5.8

System
------
Current Time: 05/26/2021 13:33:29
Uptime: 257972.484375 seconds
CPU Usage: 56%
Memory Usage: 62.19 MB
Firmware Version: 1.5.8
Model: WS-26-400-AC
Board Rev: B

show lag
Port AID SID Priority Received Transmitted Unknowns Illegals Port State
---- ----- ----- -------- ----------- ----------- ----------- ----------- ----------
1 0 0 32768 0 0 0 0 Not active
2 1 0 32768 0 0 0 0 Not active
3 2 0 32768 0 0 0 0 Not active
4 3 0 32768 0 0 0 0 Not active
5 4 0 32768 0 0 0 0 Not active
6 5 0 32768 0 0 0 0 Not active
7 6 0 32768 0 0 0 0 Not active
8 7 0 32768 0 0 0 0 Not active
9 8 0 32768 0 0 0 0 Not active
10 9 0 32768 0 0 0 0 Not active
11 10 0 32768 0 0 0 0 Not active
12 11 0 32768 0 0 0 0 Not active
13 12 0 32768 0 0 0 0 Not active
14 13 0 32768 0 0 0 0 Not active
15 14 0 32768 0 0 0 0 Not active
16 15 0 32768 0 0 0 0 Not active
17 16 0 32768 0 0 0 0 Not active
18 17 0 32768 0 0 0 0 Not active
19 18 0 32768 0 0 0 0 Not active
20 19 0 32768 0 0 0 0 Not active
21 20 0 32768 0 0 0 0 Not active
22 21 0 32768 0 0 0 0 Not active
23 22 0 32768 0 0 0 0 Not active
24 23 0 32768 0 0 0 0 Not active
25 24 256 32768 257776 266301 0 0 Active
26 24 256 32768 257776 266301 0 0 Active

MST Section deleted.

Code: Select all

 {
 "Config_Version": 53,
 "IPv4_Mode": "Static",
 "IPv4_Address": "10.75.0.248",
 "IPv4_Netmask": "255.255.255.0",
 "IPv4_Gateway": "10.75.0.254",
 "IPv4_Primary_DNS": "100.127.255.249",
 "IPv4_Secondary_DNS": "100.127.255.248",
 "IPv6_Enable": true,
 "IPv6_Mode": "SLAAC",
 "IPv6_Address": "",
 "IPv6_Gateway": "",
 "IPv6_Primary_DNS": "",
 "IPv6_Secondary_DNS": "",
 "Switch_Name": "PoE-SW-1-T0",
 "NTP_Zone": "America\/Toronto (EST5EDT,M3.2.0,M11.1.0)",
 "Switch_Location": "",
 "GPS_Latitude": "",
 "GPS_Longitude": "",
 "Credentials_Console_Login": true,
 "RADIUS_Enable": false,
 "RADIUS_Host": "",
 "RADIUS_Port": "1812",
 "RADIUS_Secret": "",
 "SSH_Enable": true,
 "SSH_Port": "22",
 "SSH_Allow_Passwords": true,
 "SSH_Allow_Telnet": false,
 "SSH_Keys": [
 ],
 "SNMP_Server_Enable": true,
 "SNMP_Server_Community": "xxxxxx",
 "SNMP_Server_Contact": "",
 "SNMP_Server_Location": "",
 "SNMP_Server_Version_1": false,
 "SNMP_Server_Version_2c": true,
 "Syslog_Enable": true,
 "Syslog_Host": "10.30.0.231",
 "Syslog_Port": "514",
 "Syslog_Exclude": "",
 "Syslog_Buffer_Size": "128",
 "Syslog_Log_Logins": true,
 "Syslog_Log_Name": true,
 "SMTP_Enable": false,
 "SMTP_Host": "",
 "SMTP_Port": "25",
 "SMTP_Username": "",
 "SMTP_Password": "",
 "SMTP_Secure": false,
 "SMTP_Address": "",
 "SMTP_From_Address": "",
 "SMTP_Local_Hostname": "",
 "NTP_Enable": true,
 "NTP_Host": "pool.ntp.org",
 "STP_Enable": true,
 "STP_Version": "MSTP",
 "STP_Max_Age": "20",
 "STP_Hello_Time": "2",
 "STP_Forward_Delay": "15",
 "STP_Priority": "32768",
 "STP_LAG_Enable": true,
 "Storm_Control_Broadcast": "512",
 "Storm_Control_Multicast": "None",
 "Storm_Control_Unicast": "None",
 "Storm_Control_Loop_Protection": true,
 "Storm_Control_Pause_Frame": true,
 "PingWatchdogs": [
 ],
 "PortBounces": [
 ],
 "AccessControls": [
 ],
 "HTTPS_Enable": true,
 "HTTPS_Port": "443",
 "HTTPS_Allow_HTTP": false,
 "HTTPS_HTTP_Port": "80",
 "AggregationMode_DestinationMAC": false,
 "AggregationMode_SourceMAC": false,
 "AggregationMode_SourceDestinationIP": true,
 "AggregationMode_SourceDestinationPort": true,
 "Tarpit_Enable": true,
 "Tarpit_Attempts": "5",
 "Tarpit_Delay": "60",
 "Discovery_Ubiquiti": true,
 "Discovery_Cisco": true,
 "Discovery_LLDP": true,
 "Auto_Backup_TFTP_URL": "",
 "Power_Hibernate_Voltage": "9",
 "Power_Wakeup_Voltage": "10",
 "Power_Warning_Voltage": "11",
 "Options_IGMP_Snooping": true,
 "Options_MAC_Aging": "300",
 "QoSRules": [
 ],
 "Options_Language": "en",
 "Serial_Mode": "Console",
 "Serial_TCP_Port": "502",
 "Serial_Baud_Rate": "115200",
 "Serial_Parity": "N",
 "Serial_Data_Bits": "8",
 "Serial_Stop_Bits": "1",
 "Email_Alerts_Link_Change": true,
 "Email_Alerts_Flow_Control": true,
 "Email_Alerts_DC_Power": true,
 "Email_Alerts_Fans": true,
 "Email_Alerts_PoE": true,
 "Email_Alerts_LACP": true,
 "Discovery_Discovery_Tab": true,
 "Discovery_Broadcast_On_Protocols": true,
 "Switch_Revert_Timer": "300",
 "Applied": true,
 "MSTP_Name": "",
 "MSTP_Revision": 0,
 "ERPS": [
 ],
 "MEPs": [
 ],
 "Ports": [
 {
 "Number": 1,
 "Name": "LINK-T0-T1",
 "Enable": true,
 "Link": "Auto",
 "PoE": "48VH",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "1",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 2,
 "Name": "LINK-T0-T5",
 "Enable": true,
 "Link": "Auto",
 "PoE": "48VH",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "2",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 3,
 "Name": "LINK-T0-T16",
 "Enable": true,
 "Link": "Auto",
 "PoE": "48VH",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "3",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 4,
 "Name": "Port 4",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "4",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": false,
 "Updated_MTU": true
 },
 {
 "Number": 5,
 "Name": "Port 5",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "5",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": false,
 "Updated_MTU": true
 },
 {
 "Number": 6,
 "Name": "Port 6",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "6",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": false,
 "Updated_MTU": true
 },
 {
 "Number": 7,
 "Name": "LINK-T0-T1-B",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "7",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 8,
 "Name": "LINK-T0-T2",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "8",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 9,
 "Name": "LINK-T0-T6",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "9",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 10,
 "Name": "LINK-T0-T29",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "10",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 11,
 "Name": "LINK-T0-T34",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "11",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 12,
 "Name": "Port 12",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "12",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 13,
 "Name": "Port 13",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "13",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 14,
 "Name": "Port 14",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "14",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 15,
 "Name": "Port 15",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "15",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 16,
 "Name": "Port 16",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "16",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 17,
 "Name": "Port 17",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "17",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 18,
 "Name": "SECTOR-03-T0",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "18",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 19,
 "Name": "SECTOR-00-T0",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "19",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 20,
 "Name": "LINK-T0-T23",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "20",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 21,
 "Name": "SECTOR-01-T0",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "Generate",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "21",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 22,
 "Name": "",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "22",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 23,
 "Name": "SECTOR-02-T0",
 "Enable": true,
 "Link": "Auto",
 "PoE": "24V",
 "FlowControl": "Generate",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "23",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 24,
 "Name": "",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "None",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "24",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 25,
 "Name": "Port 25",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "Both",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "25",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 },
 {
 "Number": 26,
 "Name": "Port 26",
 "Enable": true,
 "Link": "Auto",
 "PoE": "Off",
 "FlowControl": "Both",
 "Multicast": true,
 "MTU": "1528",
 "TxLimit": "",
 "RxLimit": "",
 "STP": true,
 "STPPriority": "128",
 "STP_Path_Cost": "",
 "Stats": true,
 "Isolation": false,
 "AllowedVLANs": "",
 "DHCP_Snooping": false,
 "Shutdown_Voltage": "",
 "Restart_Voltage": "",
 "Priority": "26",
 "Shutdown_Time": "",
 "Startup_Time": "",
 "Boot_Start_Delay": "",
 "Updated_SFP2": true,
 "QoSSched": "Strict",
 "PoE_Smart": true,
 "Updated_MTU": true
 }
 ],
 "LACP": [
 {
 "Port": 1,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 2,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 3,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 4,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 5,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 6,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 7,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 8,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 9,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 10,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 11,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 12,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 13,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 14,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 15,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 16,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 17,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 18,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 19,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 20,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 21,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 22,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 23,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 24,
 "Enable": false,
 "Key": "",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 25,
 "Enable": true,
 "Key": "256",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 },
 {
 "Port": 26,
 "Enable": true,
 "Key": "256",
 "Role": "Active",
 "Timeout": "Fast",
 "Priority": "32768"
 }
 ],
 "VLANs": [
 {
 "ID": "75",
 "Name": "Management",
 "Enable": true,
 "PortSettings": "TTTTTTUTTTTTTTTTTTTTTTTTTT",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": false
 },
 {
 "PortSettings": "EEEEEEETEEEEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0-T2",
 "ID": "6",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "EEEEEEEETEEEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0-T6",
 "ID": "7",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "EETEEEEEEEEEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0-T16",
 "ID": "10",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "ETEEEEEEEEEEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0-T5",
 "ID": "11",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "EEEEEEEEEUEEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0-T29",
 "ID": "12",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "TEEEEEEEEEEEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0 - T1",
 "ID": "500",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "EEEEEETEEEEEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0 - T1-B",
 "ID": "506",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "EEEEEEEEETEEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0-T29",
 "ID": "515",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "EEEEEEEEEEEEEEEEETTTTTTTTT",
 "Enable": true,
 "Name": "Client Traffic",
 "ID": "80",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "EEEEEEEEEEEEEEEEETTTTTTTTT",
 "Enable": true,
 "Name": "Client Management",
 "ID": "74",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 },
 {
 "PortSettings": "EEEEEEEEEETEEEEEEEEEEEEETT",
 "Enable": true,
 "Name": "OSPF Routing T0 - T34",
 "ID": "518",
 "IPv4_Enable": false,
 "IPv4_Address": "",
 "IPv4_Netmask": "",
 "IPv6_Enable": false,
 "IPv6_Address": "",
 "IGMP_Querier": true
 }
 ],
 "Mirror": {
 "Port": "None",
 "RemoteHost": "",
 "Filter_MAC": "",
 "Filter_IP": "",
 "Ports": [
 ]
 },
 "Auto_Backup_Enable": false
 }

 

OK I see, based on your configuration this might have been what occurred:
viewtopic.php?f=17&t=6290&p=33166&hilit=STP#p33166

Basically, it's probably not really an LACP/LAG issue, but an STP+VLAN one. But it will only become pronounced occasionally due to random chance from timing in the network, which of course make's it a pain to track down. As long as it's safe, the solution then is to just disable STP on those ports in the LAG.