For the last 2 weeks in a row i have reports of connectivity loss at ~540 PM. I have a syslog server that is not showing anything.. The loss seems confined to a 3500XL that has a fiber link to a 4507. All ports on the 3500 are on VLAN1. Some users have hubs/switches but they do not have spanning-tree portfast enabled on those ports.
the syslog shows a few interfaces going up and down but nothing out of the ordinary.
the switch's uptime is over 3 days
the IOS is at the latest 12.0(5) revision of 9/05.
it sounds like it could be related to spanning tree, especially since you say that some of your users are having hubs and switches. If the 4507 is your central switch, make sure that this switch is the root for all your VLANs. You can use the command:
spanning-tree vlan X priority 0
to ensure that. Can you try this and check if the problem persists ?
first of all, I would be very careful with having users attaching switches to the network, this can lead to all sorts of problems, such as loops, or one of the switches becoming root for (a VLAN in) your network.
My thought was that your problem might be caused by somebody either connecting or disconnecting a switch, causing spanning tree to converge...
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.