Hey Kim, PIM-SM does use the assert messages as well, just the same as PIM-DM does. If you have the CCIE R/S exam cert guide v3 , check out page 609 "similarities between PIM-DM and PIM-SM"
Regards, Joe Astorino CCIE #24347 (R&S) Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com <http://www.ipexpert.com/> _____ From: [email protected] [mailto:[email protected]] On Behalf Of Kim Pedersen Sent: Saturday, May 23, 2009 12:30 PM To: [email protected] Subject: [OSL | CCIE_RS] Fwd: DR and Assert. Hi, Dont know what happened, but now they are behaving the way they should.. When IGMPv2 is used, they use the lowest IP address.. When IGMPv1 is used, the one that becomes DR will become the querier as well... *shrug* But im still not clear about whether or not pim-sm uses any sort of assert messages to figure out which one should send the explicit join to the RP, and thereby forward traffic to the LAN. Thanks, Sincerly, Kim Pedersen On Sat, May 23, 2009 at 5:03 PM, prakash patel <[email protected]> wrote: Please explain me the topology thx _____ From: [email protected] To: [email protected] Subject: Re: [OSL | CCIE_RS] DR and Assert. Date: Sat, 23 May 2009 16:33:35 +0200 CC: [email protected] Hi there, Nope, didnt touch the priority. Only manually asked it to use igmp v1 and therefor expected it to use the pim election to use the dr and be querier. Thanks, Kim Pedersen Sent from my iPhone On 23/05/2009, at 15.52, prakash patel <[email protected]> wrote: Quick hint : did you configure ip pim dr-priority command ? thanks _____ Date: Sat, 23 May 2009 12:07:36 +0200 From: <mailto:[email protected]> [email protected] To: <mailto:[email protected]> [email protected] Subject: [OSL | CCIE_RS] DR and Assert. Hi All, I am trying to tackle my enemy number 1... Multicast. I am a bit confused about when two routers are connected to the same multiaccess network. As far as I understand it, when using PIM-DM, an assert message is being sent out, with the metric (AD + metric) of each router. The one with the best metric wins, in case of a tie, the router with the highest IP wins. Then later on in the material, in the description of PIM-SM, it says it elects a DR, based solely on the highest IP address. This one will be the one that sends a join up the tree towards the RP. Are assert messages not used in PIM-SM at all? and I know from the material that a DR is still being elected in PIM-DM, but it should only be used when IGMPv1 is being used to select the current querier. Is this correctly understood? Also, I have tried a pure PIM-DM network, and used IGMPv1 on my multiaccess-network towards the receiver. However, what happens is that both routers end up sending queriers onto the network, and not the DR elected router as I expected. All in all, a bit confused :) Sincerely, Kim Pedersen -- // Freedom Matters _____ HotmailR has a new way to see what's up with your friends. Check it out. <http://windowslive.com/Tutorial/Hotmail/WhatsNew?ocid=TXT_TAGLM_WL_HM_Tutor ial_WhatsNew1_052009> _____ HotmailR has ever-growing storage! Don't worry about storage limits. Check it out. <http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutori al_Storage1_052009> -- // Freedom Matters -- // Freedom Matters No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.339 / Virus Database: 270.12.31/2116 - Release Date: 05/23/09 07:00:00
