Joca wrote

The switch loses only management, all forward traffic continues smoothly , and if you enable snmp, ~ 90% use cpu.

Hardware Version	T1700G-28TQRev2
Firmware Version	2.0.1 Build 20180206 Rel.60432(Beta)

 

1	2018-12-10 17:08:18	NETIF	level_5	Line protocol on Interface Vlan4084, changed state to up.
2	2018-12-10 17:08:17	LinkScan	level_5	Te1/0/25 changed state to up.
3	2018-12-10 17:08:17	NETIF	level_5	Line protocol on Interface Vlan4084, changed state to down.

 

Generally the switch will have the high CPU usage when the switch needs to handle that data of SNMP, STP and so on. If the hign CPU usage is only for a period of time, then it's normal.

 

When you lose the management of the switch, if you can access the switch through console port, you can check the log and the swtich's status. Maybe can see more detail. You also can try to disable some features that take up the CPU, such as LACP, Loop detection and so on. Check if the situation will be better. You also can ask TP-Link Support for help.

Actual Config.cfg;

!T1700G-28TQRev2
#
#
 vlan 3998
 name "CLI_A"
 #
 vlan 4084
 name "GERENCIA4084"
 #
 vlan 4091
 name "CLI_B"
 #

#
 switch 1 provision T1700G-28TQRev2
 ip igmp snooping
 ip route 0.0.0.0 0.0.0.0 10.12.255.254
 user name admin privilege admin secret 5 $1$B0B2B>B8G9E6J4J6D2H8D9@=D9H/A>L2$'}./
 ip ssh server
 hostname "SW_ALIANCA00"
 location "POP-CLICK.COM"
 contact-info "ADMIN"
 system-time ntp UTC-03:00 10.12.255.254 139.78.100.163 12

#
interface vlan 4084
 ip address 10.12.255.113 255.255.255.0
 description "GERENCIA4084"
 
#
interface gigabitEthernet 1/0/1
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/2
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/3
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/4
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/5
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/6
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/7
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/8
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/9
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/10
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/11
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/12
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/13
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/14
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/15
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/16
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/17
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/18
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/19
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/20
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/21
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/22
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/23
 jumbo
 shutdown

#
interface gigabitEthernet 1/0/24
 jumbo
 switchport general allowed vlan 4084 untagged
 no switchport general allowed vlan 1
 switchport pvid 4084

#
interface ten-gigabitEthernet 1/0/25
 description "DST_SW_NZM00"
 jumbo
 switchport general allowed vlan 3998,4084,4091 tagged
 no switchport general allowed vlan 1
 switchport pvid 4084

#
interface ten-gigabitEthernet 1/0/26
 description "DST_CLI"
 jumbo
 switchport general allowed vlan 3998,4091 tagged
 no switchport general allowed vlan 1

#
interface ten-gigabitEthernet 1/0/27
 jumbo

#
interface ten-gigabitEthernet 1/0/28
 jumbo

#
#
 

You configuration looks very simple. But many ports are disable. Please make sure that those ports do not need to be used. : )

Cannot find the function that take up the CPU usage. Suggest to contact TP-Link support for help.