We have a VM server farm that we just converted from access port connections to trunked connections into our 6509 (we'll call it C). C is connected via trunks to our 2 core switches A and B by gig fiber. Whenever one of the VM servers is rebooted, or a trunk port (all are copper gig) is disconnected then reconnected, for some reason, A and B prune all the VLANs on their trunks to C and data connection is lost for a long enough period of time that our phones cannot register to the CUCM (connected to C) and some other data hits have now been reported. Anyone else run into this?
On trunk ports to network devices should have portfast turned off . To servers it's ok as long as the servers are not running spanning tree . In IOS there is even a command spanning-tree portfast trunk that should be used for servers. You can google vmware and spanning tree for more information .
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.