From: Anderson Nery Vilas Boas (andervb@yahoo.dk)
Date: Tue Dec 06 2005 - 19:49:28 GMT-3
Andrew come on ,
Don't let me on the dark . The fact is I cannot configure BSR or RP or static RP in the other routers , I just can have 1 bsr and 1 rpcanditade.
My dobut was if this was possible:
"without a RP, multicast will attempt to run as dense
mode. If dense mode is allowed to run over your interfaces then
multicast traffic will run in this manner"" so if I use spase-dense mode ok .
You told me yes. great!
next :
When I will stop the question definetly you said :
"How many
ways can I configure multicast to keep it from falling back into dense
mode? There is more than one way to do this ;-)"
You let me curious , I know some wayst to do not let it back to dense mode , but the question do not says: "you must not use dense mode".
So if I cannot configure either auto-rp or bsr in anymore router , I think that as you told me like as the service won't stop ( even it uses just dense)- I think it answers the question.
But just to finish , in you opinion , what more ways do you have in mind to accomplish it?
ps: this tricky question starts to be really interesting.
best regards,
"Andrew Lissitz (alissitz)" <alissitz@cisco.com> skrev:
I think the best way to answer this is with 2 to 3 routers. Do debugs
on the routers for BSR and PIM information. Keep this setup simple and
configure the candidate RP and candidate BSR on separate routers.
When the BSR no longer receives any messages from any routers wanting to
be the RP, you will see some changes. The BSR can not tell other
routers about the RP if it does not know about the RP itself.
When the BSR receives messages from RPs you will also see some
interesting activities. When other routers receive this BSR information
... you will see this in your debugs and show commands.
Your answer; yes without a RP, multicast will attempt to run as dense
mode. If dense mode is allowed to run over your interfaces then
multicast traffic will run in this manner.
I think a better question to ask or eventually investigate is: How many
ways can I configure multicast to keep it from falling back into dense
mode? There is more than one way to do this ;-)
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