Exactly what does this do?
ip pim sparse-dense-mode
Can someone point me to the link that would have the best documentation on these cisco commands.
The 'ip pim sparse-dense mode' command enables PIM to operate in sparse or dense mode, depending on the multicast group. When you enable sparse-dense mode, the interface is treated as dense mode if the multicast group is in dense mode. If the group is in sparse mode, the interface is treated in sparse mode. You must have a rendezvous point (RP) if the interface is in sparse-dense mode and you want to treat the group as a sparse group.
The RP could be configured:
- manually (ip pim rp-address)
- dinamically with AutoRP (Cisco solution, it works in sparse-dense mode, or in sparse-mode with 'autorp listener' feature)
- dinamically with BSR code (standard, it works in sparse mode)
for more informations: