I was wondering if it is possible to run PIM NBMA and Dense Mode on the hub router in a hub / spoke NBMA topology? I know people generally run PIM NBMA and sparse mode on the hub router in this kind of topology but was curious if PIM NBMA w/ Dense mode is possible.
The PIM NBMA mode is not supported with PIM-DM. The NBMA mode has two important characteristics:
PIM Joins and Prunes are tracked together with the IP address of their sender in the OIL list for a multicast routing table entry. A PIM Join or Prune is therefore always tied to a particular neighbor on an interface, not just to that interface as a whole.
Multicast traffic sent to neighbors that have expressed their interest by a Join message will be encapsulated as unicast at the link layer.
These two characteristics make the PIM NBMA mode especially suited for PIM-SM as it allows to easily track interested neighbors thanks to their Join messages and to find out their link layer address in the appropriate L3/L2 database (IP/DLCI for example).
While technically, the NBMA mode could also be supported for PIM-DM, Cisco does not appear to support it.
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.