안녕하세요.

눈팅만하다가 장애가 발생해서 글 남기게 되네요.

네트워크는 완전 초짜라서 조언 부탁드리고자 합니다.

cisco3650 을 L3로 사용 중인데요.

네트워크 장애가 있다는 접수를 받아서 스위치 로그를 보니까 무슨 이유에선지

M-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/4 and port Gi0/8
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/8
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/4 and port Gi0/8
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/4
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/6
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/4
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/4
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/8
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/6
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/6
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/8
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/8
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/6
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/6
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/6
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/6
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/8
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/8
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/2
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/6 and port Gi0/2
33w0d: %LINK-3-UPDOWN: Interface GigabitEthernet0/22, changed state to up
33w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/22, changed state to up
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/8 and port Gi0/4
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/4 and port Gi0/8
33w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/22, changed state to down
33w0d: %LINK-3-UPDOWN: Interface GigabitEthernet0/22, changed state to down
33w0d: %LINK-3-UPDOWN: Interface GigabitEthernet0/22, changed state to up
33w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/22, changed state to up
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/4 and port Gi0/6
33w0d: %SW_MATM-4-MACFLAP_NOTIF: Host 90e2.ba13.ca40 in vlan 1 is flapping between port Gi0/2 and port Gi0/6

이런 로그가 남았습니다.

2 4 6 8 포트는 IBM 서버 4포트 티밍으로 묶여있는 포트인데 이것끼리 MAC충돌이 났다고 보면 될까요??

루핑이라고 하나요?

현장에서 직접 증상을 목격한게 아니라서 너무 답답합니다.

한번 이러더니 증상이 재발되지 않고 정상작동하고 있습니다.

이럴때는 어떤 것을 어떻게 점검해봐야 할까요?? 완전 초짜인데 원인을 알아내야하는 상황이라서

썩은 동앗줄이라도 당겨 보고 싶은 마음입니다 흑흑흑

아래는 3650 스위치 셋팅값인데요 내부망입니다.

원인을 유추할 정보가 될까 싶어 이것도 같이 올려봅니다.

cisco_SW#show running-config
Building configuration...

Current configuration : 2976 bytes
!
! Last configuration change at 06:01:12 UTC Thu Feb 5 2015 by cisco
! NVRAM config last updated at 06:01:13 UTC Thu Feb 5 2015 by cisco
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname cisco_SW
!
enable secret 5 $1$JWWH$FY4E.avuWdXgog/PG2Iu80
enable password 7 01100F175804
!
no aaa new-model
clock timezone UTC 9
system mtu routing 1500
ip subnet-zero
no ip domain-lookup
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface GigabitEthernet0/1
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/2
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/3
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/4
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/5
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/6
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/7
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/8
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/9
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/10
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/11
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/12
 storm-control broadcast level 70.00 60.00

interface GigabitEthernet0/13
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/14
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/15
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/16
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/17
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/18
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/19
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/20
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/21
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/22
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/23
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/24
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/25
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/26
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/27
 storm-control broadcast level 70.00 60.00
!
interface GigabitEthernet0/28
 storm-control broadcast level 70.00 60.00
!
interface Vlan1
 ip address 192.17.25.243 255.255.255.0
!
ip default-gateway 192.17.25.1
ip classless
ip http server
!
!
control-plane
!
default-value exec-character-bits 8
!
line con 0
line vty 0 4
 password 7 110A1016141D
 logging synchronous
 login
 length 0
line vty 5 15
 login
!
end

제가 무엇을 점검해봐야 할까요?? ㅜㅜ 조언 부탁드리겠습니다.