From: gladston@br.ibm.com
Date: Mon Aug 09 2004 - 11:54:51 GMT-3
Dear KOON,
I understood your point. The problem is this statement from Cisco
(http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123newft/123t/123t_4/gtautorp.pdf)
"
By default, PIM dense mode fallback is enabled. That is, a multicast group in the absence of rendezvous point (RP) information will fall to dense mode, regardless of the interface mode configuration.
However, if all of the interfaces in a VRF are configured with PIM sparse mode, no dense mode fallback is achieved by default. If all of the interfaces are already configured as sparse, even though the group mode falls to dense mode, the traffic does not get flooded (due to the sparse characteristic of the interface). But the established flows might be torn down and the state of the network could become indeterministic. The main advantage of no dense mode fallback in this case would be deterministic behavior
"
I undertood that it says it will fallback by default if the interface is configude with sparse-dense-mode, but it will not fallback if the interface is configured with sparse-mode. Or it does refer specifically to VRF?
I am trying to simulate it and see the results.
Any comments?
This archive was generated by hypermail 2.1.4 : Fri Sep 03 2004 - 07:02:35 GMT-3