Good testing, Thanks for posting back! On Mon, Jul 27, 2009 at 7:31 AM, jmangawang <[email protected]> wrote:
> Brian, your thought was correct. > > I just tested this using 4 routers in a string: R1 - R2 - R3 - R4 > > R1 is the mrm sender, R2 is the mrm manager, R3 is the RP/mapping > agent, R4 is the mrm receiver. > > With the "ip pim spt-threshold infinity" option set, R4 only showed > the (*,G) mroute entries, but R1, R2, and R3 all showed (S,G) mroute > entries with R1 as sender. > > But with bidirectional PIM, all 4 routers only show (*,G) mroute entries. > > Without bidirectional or spt-threshold infinity, all 4 routers show > (S,G) mroute entries. > > On Sun, Jul 26, 2009 at 2:44 PM, Bryan Bartik<[email protected]> wrote: > > Good point Jason. I think the task is hinting at using Bi-directional > PIM. > > Disabling the SPT switchover would force all the receivers downstream of > the > > RP to stay on the RP tree (*, G). My only concern is if there is host > > between the RP and the Source. With SPT threshold set to zero, would the > > router between the source and RP still pull from the SPT?...haven't > tested > > it, but might be something to look into. > > > > On Sun, Jul 26, 2009 at 12:10 PM, jmangawang <[email protected]> > wrote: > >> > >> Ok, I'd just like a little clarification on another solution after > >> just having gone through this myself. > >> > >> My solution was to configure "ip pim spt-threshold infinity" on all > >> participating routers. When I did a "show ip mroute" while the MRM > >> test was running (from next task), I did not see any (S,G) entries, > >> only (*,G) entries except on the sender's table. On a whim, I removed > >> the "ip pim spt-threshold infinity" command from all routers, then > >> enabled "ip pim bidir-enable" on each, configured the RP to send out > >> bidir, and re-ran MRM. My "show ip mroute" tables looked identical > >> with the exception that every entry had "bidir" in it. > >> > >> And finally, I removed all instances of "bidir" and "spt-threshold" > >> and just ran everything normal, and the mroute tables DID show (S,G) > >> entries, like I'd expect them too. > >> > >> So, would the "ip pim spt-threshold infinity" command been an > >> acceptable solution for this? > -- Bryan Bartik CCIE #23707 (R&S), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com
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