h3c s5024PV2-EI 非工作时间ping延时出现周期性变高

有一台h3c的接入交换机，型号是h3c s5024PV2-EI，版本是version 5.20.99, Release 1105，机器只设置一个管理vlan和一个接入vlan，1-23口是access，24口是上联口trunk。

现在发现问题是一到非工作时间（中午休息，或者下午下班后）。这台交换机就开始，反反复复的，ping延时高的同时cpu占用率也高，持续4-5分钟。中间正常4-5分钟，然后又接着ping值延时高，现象一直重复，直到工作时间自动恢复正常。

中间也设置过1-23口（接入口）的广播包预制10%，问题依旧出现。

出问题时候也试过 先一半接口shutdown，此方法找不出问题，先down1-16,口，会出问题，再down17-23口，还是会出问题。甚至有时候1-23接口全down，还是出现问题

另外发现，这台交换机只要输入命令sa保存时候就会比较慢，保存同时ping值也会高，不知道跟断断续续ping值高有没有关系。

请问老师，该如何排障？

<2lou-2>display cu

#

 version 5.20.99, Release 1105

#

 sysname 2lou-2

#

 domain default enable system

#

 ipv6

#

 telnet server enable

#

 port-security enable

#

 password-recovery enable

#

vlan 1

 arp detection enable

#

vlan 112

#

vlan 250

#

domain system

 access-limit disable

 state active

 idle-cut disable

 self-service-url disable

#

user-group system

 group-attribute allow-guest

#

local-user admin

 password cipher $c$3$EkhzOhFEh59+WPOOlD32QaWsr0DwDZyU

 authorization-attribute level 3

 service-type telnet

 service-type web

#

 stp mode rstp

 stp enable

#

interface NULL0

#

interface Vlan-interface250

 ip address 192.168.250.17 255.255.255.0

#

interface GigabitEthernet1/0/1

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/2

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/3

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/4

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/5

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#               

interface GigabitEthernet1/0/6

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/7

 port access vlan 112

 broadcast-suppression 10

 multicast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/8

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/9

 port access vlan 112

 broadcast-suppression 10

 multicast-suppression 10

 unicast-suppression 15

 stp edged-port enable

#               

interface GigabitEthernet1/0/10

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/11

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/12

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/13

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/14

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/15

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/16

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/17

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/18

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/19

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/20

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/21

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/22

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/23

 port access vlan 112

 broadcast-suppression 10

 stp edged-port enable

#

interface GigabitEthernet1/0/24

 port link-type trunk

 port trunk permit vlan all

 broadcast-suppression 20

 arp detection trust

#

interface GigabitEthernet1/0/25

 arp detection trust

#

interface GigabitEthernet1/0/26

 arp detection trust

#

interface GigabitEthernet1/0/27

 arp detection trust

#

interface GigabitEthernet1/0/28

 arp detection trust

#

 ip route-static 0.0.0.0 0.0.0.0 192.168.250.250

#

 snmp-agent

 snmp-agent local-engineid 383030303633413236353133373042414546463142443932

 snmp-agent community read lhkj

 snmp-agent sys-info version v2c

 snmp-agent target-host trap address udp-domain 192.168.5.35 params securityname lhkj v2c

#

 dhcp enable

#

 arp detection validate dst-mac ip src-mac

#

 load xml-configuration

#

user-interface aux 0

user-interface vty 0 15

 authentication-mode scheme

#

return

<2lou-2>