I have not had any luck with my questions so far. That is, nobody answers them.
So I quit wasting my time sending questions. But I hope I have better luck this time, because I would like to get an explanation for this one. I don't quite understand part of the answer to Task 4.1 Specifically, I'm referring to the BGP session between R6 & R9. Both Serial Links are active in this case: R6 interface Serial0/0 ip address 144.44.60.6 255.255.255.0 ! interface Serial0/1 ip address 144.44.61.6 255.255.255.0 R9 interface Serial0/0 ip address 144.44.60.9 255.255.255.0 ! interface Serial0/1 ip address 144.44.61.9 255.255.255.0 And are being asked to configure a IBGP session between these two. Since we have 2 links between this pair of Routers, then it would make a lot more sense to establish the BGP session using the Loopbacks, so that we get Load Balancing, correct? Load Bal. is not a requirement in this case, but as far as I know, that's always the Best Practice anyway. However, the solution does NOT do that. Instead, it just creates 2 separate sessions: R6 router bgp 96 neigh 144.44.60.9 remote 96 neigh 144.44.61.9 remote 96 R9 router bgp 200 neigh 144.44.60.6 remote 96 neigh 144.44.61.6 remote 96 Question is: Is there any VALID reason why you are doing this here? Thank you! --- On Mon, 6/8/09, Joe Astorino <[email protected]> wrote: From: Joe Astorino <[email protected]> Subject: Re: [OSL | CCIE_RS] IPE vol2 lab 3 To: "'Bodnar, Edward'" <[email protected]>, "'Bryan Bartik'" <[email protected]> Cc: [email protected] Date: Monday, June 8, 2009, 11:48 AM _filtered #yiv980167237 { font-family:Cambria Math;} _filtered #yiv980167237 { font-family:Calibri;} _filtered #yiv980167237 {margin:1.0in 1.0in 1.0in 1.0in;} #yiv980167237 P.MsoNormal { MARGIN:0in 0in 0pt;FONT-FAMILY:"Times New Roman", "serif";FONT-SIZE:12pt;} #yiv980167237 LI.MsoNormal { MARGIN:0in 0in 0pt;FONT-FAMILY:"Times New Roman", "serif";FONT-SIZE:12pt;} #yiv980167237 DIV.MsoNormal { MARGIN:0in 0in 0pt;FONT-FAMILY:"Times New Roman", "serif";FONT-SIZE:12pt;} #yiv980167237 A:link { COLOR:blue;TEXT-DECORATION:underline;} #yiv980167237 SPAN.MsoHyperlink { COLOR:blue;TEXT-DECORATION:underline;} #yiv980167237 A:visited { COLOR:purple;TEXT-DECORATION:underline;} #yiv980167237 SPAN.MsoHyperlinkFollowed { COLOR:purple;TEXT-DECORATION:underline;} #yiv980167237 P { FONT-FAMILY:"Times New Roman", "serif";MARGIN-LEFT:0in;FONT-SIZE:12pt;MARGIN-RIGHT:0in;} #yiv980167237 P.MsoListParagraph { MARGIN:0in 0in 0pt 0.5in;FONT-FAMILY:"Times New Roman", "serif";FONT-SIZE:12pt;} #yiv980167237 LI.MsoListParagraph { MARGIN:0in 0in 0pt 0.5in;FONT-FAMILY:"Times New Roman", "serif";FONT-SIZE:12pt;} #yiv980167237 DIV.MsoListParagraph { MARGIN:0in 0in 0pt 0.5in;FONT-FAMILY:"Times New Roman", "serif";FONT-SIZE:12pt;} #yiv980167237 SPAN.EmailStyle18 { FONT-FAMILY:"Calibri", "sans-serif";COLOR:#1f497d;} #yiv980167237 .MsoChpDefault { } #yiv980167237 DIV.Section1 { } #yiv980167237 OL { MARGIN-BOTTOM:0in;} #yiv980167237 UL { MARGIN-BOTTOM:0in;} Hey Ed, 1) You need to use this command if you are using Auto-RP in a sparse-mode environment 2) Basically here is the idea -- OK, think about how Auto-RP works, it uses dense mode to propogate the RP information using 224.0.1.39 and 224.0.1.40.....so by design the information is propogated throughout the entire multicast domain. When you use sparse mode, it basically breaks this concept...because you are not requesting the groups you will not get them. What the command does is sort of a "hack." It allows you to use Auto-RP even though you are using sparse mode. Essentially it says "For 224.0.1.39 and 224.0.1.40 I am allowed to use dense mode, for everything else use sparse mode" HTH, Regards, Joe Astorino CCIE #24347 (R&S) Sr. Support Engineer – IPexpert, Inc. URL: http://www.IPexpert.com From: [email protected] [mailto:[email protected]] On Behalf Of Bodnar, Edward Sent: Sunday, June 07, 2009 8:30 PM To: 'Bryan Bartik' Cc: [email protected] Subject: Re: [OSL | CCIE_RS] IPE vol2 lab 3 I have a question about “ip pim autorp listener” 1. When do I need to use this sparce-mode only ? sparce-dense-mode 2. What does this command do. I take it off my configuration and it seems to be working without it. ED, No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.339 / Virus Database: 270.12.54/2158 - Release Date: 06/08/09 06:01:00
