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SysTrZ
 Post subject: Switch Help
PostPosted: Wed Jul 18, 2012 1:19 pm 
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Hello

I am still covering for our Network Engineer that is on vacation... One of our sites is logging this on the switch

Code:
*Mar  5 22:06:58.972: %SW_MATM-4-MACFLAP_NOTIF: Host 5c26.0a0e.8a1a in vlan 1 is flapping between port Gi1/0/1 and port Gi1/0/15
*Mar  5 22:06:59.433: %SW_MATM-4-MACFLAP_NOTIF: Host 0026.b9e4.2656 in vlan 1 is flapping between port Gi1/0/1 and port Gi1/0/15
*Mar  5 22:06:59.559: %SW_MATM-4-MACFLAP_NOTIF: Host 000b.0e1d.5440 in vlan 1 is flapping between port Gi1/0/1 and port Gi1/0/15
*Mar  5 22:06:59.679: %SW_MATM-4-MACFLAP_NOTIF: Host e05f.b978.9cb0 in vlan 1 is flapping between port Gi1/0/1 and port Gi1/0/15
*Mar  5 22:06:59.679: %SW_MATM-4-MACFLAP_NOTIF: Host 000f.661f.065b in vlan 1 is flapping between port Gi1/0/15 and port Gi1/0/1
*Mar  5 22:06:59.748: %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d4d.7101 in vlan 1 is flapping between port Gi1/0/15 and port Gi1/0/1
*Mar  5 22:06:59.784: %SW_MATM-4-MACFLAP_NOTIF: Host 5c26.0a80.8e78 in vlan 1 is flapping between port Gi1/0/15 and port Gi1/0/1
*Mar  5 22:06:59.784: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.b9ec.5c9b in vlan 1 is flapping between port Gi1/0/1 and port Gi1/0/26
*Mar  5 22:06:59.784: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.b9ec.5c5f in vlan 1 is flapping between port Gi1/0/1 and port Gi1/0/42
*Mar  5 22:07:12.315: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/39, changed state to down
*Mar  5 22:07:14.323: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/39, changed state to up
*Mar  5 22:07:33.580: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/1, changed state to down
*Mar  5 22:07:34.586: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/1, changed state to down
*Mar  5 22:07:38.225: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/1, changed state to up
*Mar  5 22:07:39.226: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/1, changed state to up
*Mar  5 22:08:59.180: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/1, changed state to down
*Mar  5 22:09:00.187: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/1, changed state to down
*Mar  5 22:09:03.799: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/1, changed state to up
*Mar  5 22:09:04.806: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/1, changed state to up


What could this be? Any help is greatly appreciated
thanks
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Dinger
 Post subject: Re: Switch Help
PostPosted: Wed Jul 18, 2012 1:25 pm 
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What his means is your switch is seeing several MAC addresses coming in from two different ports; this could be a sign of a loop.

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jdsilva
 Post subject: Re: Switch Help
PostPosted: Wed Jul 18, 2012 1:29 pm 
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Or it's a server with a teamed NIC.

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that1guy15
 Post subject: Re: Switch Help
PostPosted: Wed Jul 18, 2012 1:31 pm 
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Many different possibilities. Just depends on your setup and what that mac actually belongs to. Give us more details

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SysTrZ
 Post subject: Re: Switch Help
PostPosted: Wed Jul 18, 2012 1:40 pm 
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So I found out that it is a siple connection...

from the router gi0/0.1 goes to switch stack 2960's. There are a few servers plugged in ports

Gi2/0/1 up up Uplinkl to Router
Gi2/0/2 up up Uplinkl to Wireless MX-8
Gi2/0/3 up up Uplinkl to VOIP
Gi2/0/4 up up Uplinkl to Domain Controller
Gi2/0/5 up up Uplink to DRAC to Domain Conntroler
Gi2/0/6 up up Uplinkl to APP Server
Gi2/0/7 up up Uplink to DRAC to APP Server
Gi2/0/8 up up Uplink to File Server
Gi2/0/9 up up Uplink to DRAC for File Server
Gi2/0/10 up up Uplink to HYPER-V Server
Gi2/0/11 up up uplink to Voice Mail System

the rest of the ports are for end users and look like this

interface GigabitEthernet2/0/40
switchport voice vlan 2
spanning-tree portfast
!
interface GigabitEthernet2/0/41
switchport voice vlan 2
spanning-tree portfast
!
interface GigabitEthernet2/0/42
switchport voice vlan 2
spanning-tree portfast
!
interface GigabitEthernet2/0/43
switchport voice vlan 2
spanning-tree portfast
!
interface GigabitEthernet2/0/44
switchport voice vlan 2
spanning-tree portfast
!
interface GigabitEthernet2/0/45
switchport voice vlan 2
spanning-tree portfast
!

etc ..............

there are 4 switches in this stack
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