Being that said, I turned to Reddit to see if I was missing something. Ithought it was the flapping but as yoou said before it is just a hint and not an error The Problem is that i dont know the device of that mac 0800. I have about 4 to 5 different mac-adresses so far so shouldn't take to long. How I can solve my problem? Does anyone have any ideas? Determine what is connected to those ports. The rest is just ranting. I have seen bad port flaps with crappy punchdowns or patch cables.
As an update to this, it seems all ports have mysteriously stopped flapping as of now, but I am still monitoring it. Otherwise the switch will see the mac on different ports and that's a huge no-no. My question: Can you tell me the reason why my switch is telling me that there is another Mac flapping between this ports? In addition, traffic is heavy on some interfaces, and there are a large number of broadcast packets. Spanning tree timers are different, but you may have tuned them. Please look at things that cause ports to go down. Obviously the first thing was to eliminate a L2 loop, we have looked into this many times, rebuilding diagrams from scratch using both cdp and physical tracing and we absolutely cannot find a loop anywhere.
Without port configs and interface stats there isn't much to go on. The wikiHow Tech Team also followed the article's instructions, and validated that they work. It seems to be happening on the 3650, but not happening on the 4948. Is this access layer, distribution layer, or what? I agree with snowbirdie, check interfaces and layer 1 issues. Designated root has priority 1, address 3c08. Then look at whatever is connected to that port. To learn more, see our.
It would be intermittent if the laptop is taken from the desk and carried around by the user when away from their usual workplace, using only the wi-fi at those times. The trunks are configured with the Juniper side being active and Cisco being passive. I attached a quick scetch of the network that is affected to clarify quickscheme. You can't find the client Mac address from a remote server. Depending on how logging was set up. Lay some groundwork for us.
This may be caused by someone plugging in a hub or dumb switch into multiple ports. Another thing you should look into as well while you are investigating your potential network loop. How are the servers connected to the switches? In all other area it is also working with this kind of mac flap. It's part of the client-roam process. Also, 22 does not seem to be much of a regular interval here, just one of the intervals.
I need to figure out why i have this timeouts for this devices. Think from the perspective of the switch port X is the port directly attached to server. Rule 4: No Low Quality Posts. This is probably caused by a layer-2 loop. Unfortunately, you may need physically check things out. Open the System Settings from the Dashboard.
It wasn't until people started shooting off ideas that you offered more feedback. Check the times too - looks like times between up and down are ~22 seconds. Hello, What should be the behavior in the below case. When I connect a sender and a receiver to switch B, after a little bit, and seemingly at random, I will get a message on the console of switch B saying some mac address on vlan 50 is flapping between the port configured as the trunk and the multicast sender. You should investigate how the switches are connected, both directly and indirectly. I then looked at Show Run and checked to make sure there was no configuration issues. You exceed the threshold for the 3650, but not for the 4948.
This router provides the internet access to guest. Running arbitrary debugs is a wicked bad idea on production equipment. Is it always the same access ports tripping port security? They could be windows hosts rebooting based on some admin's scripting or some bundle of cables being compressed every time someone walks over a section of floor. Not sure about the times, I will look into that. The new backbone is still some years off so for the good of everyone we need to work together to reduce this. One of the switches is a 3650, and the other is a 4948. I am sorry if I bothered you in any way.
We've been having an issue for the last few weeks on a relatively small network. Every router is different, but most will have a status page somewhere in the configuration showing currently-connected devices. The interface is put into the errdisabled state if it flaps more than five times in 10 seconds. So, ping with host A: Host A ping 192. Designated root has priority 1, address 3c08. If you aren't running spanning-tree, turn it on.
Does that 3750X act as your default gateway as well? There are two or three common causes that we see. Does that narrow it down any? Pick one, and troubleshoot it as a representative port. The connections are listed in the left frame. They are helping you - give them everything that you've done that may be pertinent. That could be an indication of a serious problem like a loop and the switch is letting you know about it.