04-17-2024 04:55 AM
Apr 16 04:14:35.390: %SW_MATM-4-MACFLAP_NOTIF: Host 001b.0907.fe0e in vlan 11 is flapping between port Gi1/1/1 and port Gi1/1/2Apr 16 04:14:35.390: %SW_MATM-4-MACFLAP_NOTIF: Host 001b.0907.fe0e in vlan 11 is flapping between port Gi1/1/1 and port Gi1/1/2
Solved! Go to Solution.
04-17-2024 11:18 PM
And the vlan12 bpdu is sent only not recieve.
So these three SW not recieve root SW bpdu and it elect new Root SW this mac flapping and make your SW not stable.
Now check SW connect to these three SW (wrong root bridge and I am sure it these three SW connect to each other in chain) if SW connect to these SW recieve bpdu or not.
MHM
04-18-2024 12:03 AM
After Ring is on, we have to check, but issue has been same
then check show spanning tree VLAN 11 ROOT ID CHANGE
VLAN0011
Spanning tree enabled protocol ieee
Root ID Priority 32779
Address 5ce1.76b0.1c00
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32779 (priority 32768 sys-id-ext 11)
Address 5ce1.76b0.1c00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 15 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi1/0/1 Desg FWD 19 128.1 P2p
Gi1/0/2 Desg FWD 19 128.2 P2p
Gi1/0/3 Desg FWD 19 128.3 P2p
Gi1/0/5 Desg FWD 19 128.5 P2p
Gi1/0/6 Desg FWD 19 128.6 P2p
Gi1/0/9 Desg FWD 19 128.9 P2p
Gi1/0/10 Desg FWD 19 128.10 P2p
Gi1/0/12 Desg FWD 19 128.12 P2p
Gi1/0/25 Root FWD 4 128.25 P2p
Gi1/0/28 Desg FWD 4 128.28 P2p
04-18-2024 12:36 AM
Hello
Gi1/1 Desg FWD 4 128.1 P2p Peer(STP)
Gi1/2 Root FWD 4 128.2 P2p Peer(STP)
Fa1/2 Desg FWD 19 128.4 P2p
Fa1/3 Desg FWD 19 128.5 P2p
Fa1/4 Desg FWD 19 128.6 P2p
If the above is from your core switch, then its NOT the STP root for all the vlans (11) and its connected to a switch(s) that is not running RSTP
Post the following from the core switch and its connected switches:
sh cdp neighbours
sh interface trunk
sh vlan brief
sh spanning-tree root
sh spanning-tree vlan 11
04-18-2024 12:50 AM
Thanks for support
issue has been resolved
05-14-2024 06:29 PM
How did u resolve it I am facing same issue?
05-14-2024 09:30 PM
Make new post it is better
MHM
05-16-2024 08:09 PM
All switches letest IOS update
05-16-2024 08:22 PM
Fixing native vlan mismatches solved the issue for me
04-18-2024 12:59 AM
No thanks to me lol..
Glad issue is solved' the rstp is compatible with stp but in ring I will do more check why this happened.
Have a nice day
MHM
04-18-2024 03:35 AM
hello MHM
mac flapping issue is resolved, but all switches ping is high latency
04-18-2024 08:12 AM
Wait for at least 5hours then try ping.
Note that mac flapping stop but still mac not clear for some interface.
So wait until mac is aged and remove and then check
MHM
06-03-2024 02:25 AM
Hello..
Issue has been same please help me
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