The ACL is fine. The priority value should be swapped so that it uses 10 on R2 and 20 on R7. This is just another lesson in how CCIE¹s can make typo¹s. I¹m fixing it up in our Proctor Guide now.
Cheers, Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP Sr. Technical Instructor - IPexpert, Inc. URL: http://www.IPexpert.com Telephone: +1.810.326.1444 Fax: +1.810.454.0130 Mailto: [email protected] From: Carlos Valero <[email protected]> Date: Thu, 9 Jul 2009 17:19:29 -0700 (PDT) To: <[email protected]>, Joe Astorino <[email protected]> Subject: Re: [OSL | CCIE_RS] Vol 3, Lab 2, Task 5.1 (Multicast) Made a little mistake on the requirements section. The second part should be like this: Configure R7 to announce candidacy as an RP for Groups: - First octet = 225 or 227 - Second octet less than 128 - Priority = 20 Originally I wrote Priority = 10 But the solution it is being configured with Priority = 10 - ip pim rp-candidate l1 group-list 51 prio 10 That's exactly the source of my confusion. Why is R7 configuration based on R2's requirements and vice-versa? --- On Thu, 7/9/09, Carlos Valero <[email protected]> wrote: > > From: Carlos Valero <[email protected]> > Subject: Re: [OSL | CCIE_RS] Vol 3, Lab 2, Task 5.1 (Multicast) > To: [email protected], "Joe Astorino" <[email protected]> > Date: Thursday, July 9, 2009, 7:26 PM > > Hello, > > I think I need some help with this task. > It seems to be quite simple, but to me the solution seems to be backwards and > I'm very confused and stock! > > Requirements: > > Configure R2 to announce candidacy as an RP for Groups: > - First octet = 225 or 227 > - Priority = 10 > > Configure R7 to announce candidacy as an RP for Groups: > - First octet = 225 or 227 > - Second octet less than 128 > - Priority = 10 > > Solution: > > R2: > > access-list 51 permit 225.0.0.0 0.255.255.255 > access-list 51 permit 227.0.0.0 0.255.255.255 > > ip pim rp-candidate l1 group-list 51 prio 20 > ip pim bsr-candidate l1 > > R7: > > access-list 51 permit 225.0.0.0 0.127.255.255 > access-list 51 permit 227.0.0.0 0.127.255.255 > access-list 51 permit 225.0.0.0 0.127.255.255 > access-list 51 permit 227.0.0.0 0.127.255.255 > > ip pim rp-candidate l1 group-list 51 prio 10 > ip pim bsr-candidate l1 > > This seems to be backwards to me! > > That is, the requirements state that R2 should have a Priority = 10 and > R7 should have a Priority = 20 > > But it is configured backwards! R2 = 20 and R7 = 10! > > Needless to say, the ACL also seem to be backwards to me! > > Obviously, there is something that I'm missing here. > And frankly I don't know what it is. > > I hope somebody can help. > > Did I mention that Multicast is my less favorite topic? > Actually I should say that I almost hate it :-( > > > > > > > > > --- On Wed, 7/8/09, Joe Astorino <[email protected]> wrote: >> >> > > > > -----Inline Attachment Follows----- > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
