ERSPAN solves a voice recording issue we see a lot in properly structured campus networks. A lot of Voice recording solutions require SPAN to be configured to replicate traffic to a server. In an IP world with IP Phones this is tricky as you either have lots of voice recorders local to each switch or end up with VLAN trunks everywhere.
ERSPAN is a good workaround for this (however I have not tested it so far) but it seems to only be available on the Catalyst 6500/7600 platform. In a lot of deployments we have Catalyst 3560/3750 switches installed at the edge supporting IP phones and it is here we would like to configure SPAN with the destination being a server in the data centre. Unfortunately the network between them consists of several Layer-3 hops so we can't trunk a RSPAN VLAN back.
Is there anything in the roadmap for ERSPAN on the stackable Catalysts?
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.