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246
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15
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Flapping Ports

billybong
Beginner
Beginner

Hi Guys would someone be willing look at some ports i have flapping

Vlan 204 is a wireless network & Vlan 110 is CCTV & Door locks 

Port G2/0/3 & G1/1/1 are in the same stack

Sep 22 05:31:43.327: %SW_MATM-4-MACFLAP_NOTIF: Host 1a9a.2b02.2949 in vlan 204 is flapping between port Gi2/0/3 and port Gi1/1/1
Sep 22 06:20:11.027: %SW_MATM-4-MACFLAP_NOTIF: Host 8875.9875.8a7d in vlan 40 is flapping between port Gi1/1/1 and port Gi2/0/5
Sep 22 06:23:56.860: %SW_MATM-4-MACFLAP_NOTIF: Host 8875.9875.8a7d in vlan 40 is flapping between port Gi1/1/1 and port Gi2/0/5

after looking at the topoloy it looks like it being caused by the CCTV or Door locks on vlan 110


VLAN0001 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 97 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0010 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 92 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0020 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0030 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 81 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0040 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0050 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0060 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 81 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0070 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0080 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0090 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0100 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0104 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 81 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0110 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 1028 last change occurred 14:47:33 ago
from GigabitEthernet1/1/2
VLAN0200 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 83 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0202 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0204 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 81 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0210 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 110 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0253 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 81 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0254 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 77 last change occurred 4w0d ago
from GigabitEthernet1/1/2
VLAN0551 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 80 last change occurred 4w0d ago
from GigabitEthernet1/1/2

15 Replies 15

balaji.bandi
VIP Guru VIP Guru
VIP Guru

some security system act or behave odd, is this 2 ports connected to Security door system ? i would ask vendor to investigate, there may be faulty system.

 

BB

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Thanks as always Balaji, its always vlan110 that causes the topology change but sometimes it causes different ports to flap

i make a note of the logs and check in the path what is wrong, also note the MAC address and investigate.

 

BB

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yeah i've been doing that but i'm not getting anywhere

all the mac's lead me back to wireless devices

if you have roaming, we see that messages that is normal (if this is wireless).

 

BB

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Please disable feature mesh of Access Point Wi-Fi, if you use unifi Access Point please uncheck feature use mesh or uncheck use wireless for uplink mode globle setting

billybong
Beginner
Beginner

Thanks Guys but none of the suggestions are helping i'm getting reports of users having to disconnect and reconnect

Is this normal
Sep 22 17:29:11.060: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/11, changed state to up
Sep 22 17:29:12.060: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/11, changed state to up
Sep 22 19:28:44.388: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/12, changed state to down
Sep 22 19:28:45.392: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/12, changed state to down
Sep 22 19:28:48.058: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/12, changed state to up
Sep 22 19:28:49.059: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/12, changed state to up
Sep 22 21:35:19.626: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/12, changed state to down
Sep 22 21:35:20.640: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/12, changed state to down
Sep 22 21:35:23.346: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/12, changed state to up
Sep 22 21:35:24.346: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/12, changed state to up
Sep 23 01:11:24.760: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/9, changed state to down
Sep 23 01:11:25.763: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/9, changed state to down
Sep 23 01:11:28.498: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/9, changed state to up
Sep 23 01:11:29.498: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/9, changed state to up
Sep 23 02:35:56.173: %SW_MATM-4-MACFLAP_NOTIF: Host 1a9a.2b02.2949 in vlan 204 is flapping between port Gi1/1/1 and port Gi2/0/5
Sep 23 02:46:44.581: %SW_MATM-4-MACFLAP_NOTIF: Host 8875.9875.8a7d in vlan 40 is flapping between port Gi1/1/1 and port Gi2/0/5
Sep 23 03:25:48.674: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/12, changed state to down
Sep 23 03:25:49.679: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/12, changed state to down
Sep 23 03:25:52.360: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/12, changed state to up
Sep 23 03:25:53.360: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/12, changed state to up
Sep 23 03:53:50.253: %SW_MATM-4-MACFLAP_NOTIF: Host 8875.9875.8a7d in vlan 40 is flapping between port Gi2/0/5 and port Gi1/1/1
Sep 23 04:08:22.329: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet4/0/9, changed state to down
Sep 23 04:08:23.331: %LINK-3-UPDOWN: Interface GigabitEthernet4/0/9, changed state to down
Sep 23 04:08:25.975: %LINK-3-UPDOWN: Interface GigabitEthernet4/0/9, changed state to up
Sep 23 04:08:26.975: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet4/0/9, changed state to up
Sep 23 06:40:44.690: %SW_MATM-4-MACFLAP_NOTIF: Host 1a9a.2b02.2949 in vlan 204 is flapping between port Gi2/0/5 and port Gi1/1/1
Sep 23 07:40:44.134: %SW_MATM-4-MACFLAP_NOTIF: Host 8875.9875.8a7d in vlan 40 is flapping between port Gi1/1/1 and port Gi2/0/5
Sep 23 07:45:47.809: %SW_MATM-4-MACFLAP_NOTIF: Host 1a9a.2b02.2949 in vlan 204 is flapping between port Gi1/1/1 and port Gi2/0/5
Sep 23 09:18:26.451: %SW_MATM-4-MACFLAP_NOTIF: Host 8875.9875.8a7d in vlan 40 is flapping between port Gi2/0/3 and port Gi1/1/1
Sep 23 09:35:31.416: %SW_MATM-4-MACFLAP_NOTIF: Host 8875.9875.8a7d in vlan 40 is flapping between port Gi1/1/1 and port Gi2/0/3
Sep 23 09:50:28.265: %SW_MATM-4-MACFLAP_NOTIF: Host 8875.9875.8a7d in vlan 40 is flapping between port Gi2/0/5 and port Gi1/1/1

is this normal, not sure you need to tell us, its your network.

most cases if the user turn off the device the ports go up and down, that is normal, you do not like to see that message then you need to disable that feature on the interface.

if the user device connected and you have network intermittent, then you need draw a plan and troubleshoot, where any loops in the network.

by the way, what switch model, what IOS code running,?

 

BB

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Thats the problem i'm not sure how troubleshoot this, the site is remote

First i would draw network diagram, start working from top to bottom or bottom to top of the network.

you need someone onsite to help you, but if you like to keen to resolve this issue, i would go personally rather rely the other person information to fix the issue.

good luck.

BB

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How to Ask The Cisco Community for Help

are you use any 802.1x ?

i don't think so how do i check ?

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