Another thing to note is there were no routing loops in this network when I began the ticket. Marko had the same situation on the video solution but expressed several times that a topology change could trigger a routing loop depending on how the network converged based on where redistribution was configured. No where while working on this ticket have I seen output from 'debug ip routing' that would indicate I had a routing loop.
As for Marko's recommendations on tagging everything - check the route-maps in my earlier email. They match Marko's example in the video solution (and the redistribution vLecture) 100% aside from the naming convention. On Fri, Sep 24, 2010 at 9:01 PM, Jay Taylor <[email protected]> wrote: > Yes and none of the route-map statements going from EIGRP to OSPF actually > set the tag to 110. Your RIP to OSPF route-map is the same thing... nothing > sets the tag to 110. > > > > On Fri, Sep 24, 2010 at 8:58 PM, Jason Maynard > <[email protected]>wrote: > >> I am not following (sorry) >> >> >> >> Did you read the full route-maps from my original post? >> >> >> >> >> >> >> >> *From:* Jay Taylor [mailto:[email protected]] >> *Sent:* September-24-10 8:51 PM >> *To:* Jason Maynard >> *Cc:* Mark Beynon; [email protected] >> >> *Subject:* Re: [OSL | CCIE_RS] VOL3-LAB5 - Ticket6 >> >> >> >> With this route-map applied everywhere OSPF is redistributed into EIGRP no >> routes will ever be tagged with 110. >> >> On Fri, Sep 24, 2010 at 8:47 PM, Jason Maynard <[email protected]> >> wrote: >> >> Lets analyze one example and I will explain where I am coming from >> >> >> >> OSPF into EIGRP >> >> >> >> route-map O-E deny 10 >> >> match tag 90 (ensures that any route tag anywhere else that matches 90 >> will not be redistributed) >> >> ! >> >> route-map O-E permit 20 >> >> match tag 110 (If I have tagged this elsewhere match it, for example the >> E-O route-map) >> >> set tag 110 (ensure the tag remains and is not overwritten to allow me >> to make decisions elsewhere is needed) >> >> ! >> >> route-map O-E permit 25 >> >> match tag 120 (If I have tagged this elsewhere match it) >> >> set tag 120 (ensure the tag remains and is not overwritten to allow me >> to make decisions elsewhere is needed) >> >> ! >> >> route-map O-E permit 30 >> >> set tag 90 (anything else left must be EIGRP so tag it so I can use the >> tag elsewhere to make decisions) >> >> >> >> If I am wrong in my logic please correct me. >> >> >> >> >> >> >> >> *From:* Mark Beynon [mailto:[email protected]] >> *Sent:* September-24-10 6:33 PM >> *To:* Jason Maynard >> *Cc:* [email protected] >> >> >> *Subject:* Re: [OSL | CCIE_RS] VOL3-LAB5 - Ticket6 >> >> >> >> Hi jason, I don't have access to the work book right now, but I would >> suggest there is something omiss with your o-e route map... Please correct >> if I'm wrong! >> >> >> >> You start by denying tag 90, good, no eigrp going in to eigrp. >> >> >> >> You then match ospf tag, and reset ospf tag? Liitle unsure on this, >> wouldn't expect you to have ospf routes already tag as ospf routes within >> ospf, but can see is possible. Usually expect this as a catch all last entry >> with out the match command. Expect you may have two ospf islands for >> example.. >> >> >> >> You then pass through rip, all fine. >> >> >> >> But you then at the bottom of your route map, match everything else known >> in ospf, and tag it as eigrp?? I would expect this to be where you set tag >> 110... >> >> Same concern on your e-o route map >> >> >> Sent from my iPhone >> >> >> On 23 Sep 2010, at 15:20, Jason Maynard <[email protected]> wrote: >> >> Nothing shows on any device (debug ip routing is running) >> >> >> >> I really appreciate your feedback as to whether the approach is good and >> whether or not I should of done things differently. >> >> >> >> Thanks >> >> >> >> >> Jason Maynard >> >> >> >> >> ------------------------------ >> >> *From:* Marko Milivojevic <[email protected]> >> *To:* Jason Maynard <[email protected]> >> *Cc:* Jason Maynard <[email protected]>; "< >> [email protected]>" <[email protected]> >> *Sent:* Thu, September 23, 2010 9:31:48 AM >> *Subject:* Re: [OSL | CCIE_RS] VOL3-LAB5 - Ticket6 >> >> I'm in the class just now. I will have to read through the lab and your >> solution to see. >> >> >> >> Are there any loops in the network? If not, your solution must be OK. >> >> >> >> -- >> >> Marko Milivojevic - CCIE #18427 >> >> Senior Technical Instructor - IPexpert >> >> >> >> Free CCIE Training: http://bit.ly/vLecture >> >> >> >> Mailto: [email protected] >> >> Telephone: +1.810.326.1444 >> >> Community: http://www.ipexpert.com/communities >> >> >> >> :: Sent from my phone. Apologies for errors and brevity. :: >> >> >> On Sep 23, 2010, at 12:15, "Jason Maynard" <[email protected]> >> wrote: >> >> Hey guys I can really use some feedback >> >> >> >> Marko and/or Tyson can you please provide some feedback? >> >> >> >> Thanks!! >> >> >> >> *From:* [email protected] [mailto: >> [email protected]] *On Behalf Of *Jason Maynard >> *Sent:* September-22-10 9:27 PM >> *To:* [email protected] >> *Subject:* [OSL | CCIE_RS] VOL3-LAB5 - Ticket6 >> >> >> >> >> >> Hey guys can you confirm whether my route-map works and ensures not loops >> could form. The DSG has allot less configuration but I know Marko has >> mentioned in his lectures that tags just ensure that loops cannot for even >> if routing protocols have mechanisms to prevent them. (Marko, I hope I have >> this right and if not I am sure you will correct me :P ) >> >> >> >> Redistribution and ensure that there is no LOOPs >> >> >> >> *R4* >> >> *__* >> >> * * >> >> *Protocols EIGRP and OSPF* >> >> >> >> route-map O-E deny 10 >> >> match tag 90 >> >> ! >> >> route-map O-E permit 20 >> >> match tag 110 >> >> set tag 110 >> >> ! >> >> route-map O-E permit 25 >> >> match tag 120 >> >> set tag 120 >> >> ! >> >> route-map O-E permit 30 >> >> set tag 90 >> >> ! >> >> route-map E-O deny 10 >> >> match tag 110 >> >> ! >> >> route-map E-O permit 20 >> >> match tag 90 >> >> set tag 90 >> >> ! >> >> route-map E-O permit 25 >> >> match tag 120 >> >> set tag 120 >> >> ! >> >> route-map E-O permit 30 >> >> set tag 110 >> >> >> >> *R7* >> >> *__* >> >> *Protocols EIGRP and OSPF and RIP* >> >> >> >> route-map O-E deny 10 >> >> match tag 90 >> >> ! >> >> route-map O-E permit 20 >> >> match tag 110 >> >> set tag 110 >> >> ! >> >> route-map O-E permit 25 >> >> match tag 120 >> >> set tag 120 >> >> ! >> >> route-map O-E permit 30 >> >> set tag 90 >> >> ! >> >> route-map E-O deny 10 >> >> match tag 110 >> >> ! >> >> route-map E-O permit 20 >> >> match tag 90 >> >> set tag 90 >> >> ! >> >> route-map E-O permit 25 >> >> match tag 120 >> >> set tag 120 >> >> ! >> >> route-map E-O permit 30 >> >> set tag 110 >> >> ! >> >> route-map R-O deny 10 >> >> match tag 110 >> >> ! >> >> route-map R-O permit 20 >> >> match tag 120 >> >> set tag 120 >> >> ! >> >> route-map R-O permit 25 >> >> match tag 90 >> >> set tag 90 >> >> ! >> >> route-map R-O permit 30 >> >> set tag 120 >> >> ! >> >> route-map O-R deny 10 >> >> match tag 120 >> >> ! >> >> route-map O-R permit 20 >> >> match tag 110 >> >> set tag 110 >> >> ! >> >> route-map O-R permit 25 >> >> match tag 90 >> >> set tag 90 >> >> ! >> >> route-map O-R permit 30 >> >> set tag 120 >> >> ! >> >> route-map E-R deny 10 >> >> match tag 120 >> >> ! >> >> route-map E-R permit 20 >> >> match tag 90 >> >> set tag 90 >> >> ! >> >> route-map E-R permit 25 >> >> match tag 110 >> >> set tag 110 >> >> ! >> >> route-map E-R permit 30 >> >> set tag 120 >> >> ! >> >> route-map R-E deny 10 >> >> match tag 90 >> >> ! >> >> route-map R-E permit 20 >> >> match tag 120 >> >> set tag 120 >> >> ! >> >> route-map R-E permit 25 >> >> match tag 110 >> >> set tag 110 >> >> ! >> >> route-map R-E permit 30 >> >> set tag 90 >> >> >> >> >> >> *R9* >> >> *__* >> >> * * >> >> *Protocols EIGRP and RIP* >> >> >> >> route-map E-R deny 10 >> >> match tag 120 >> >> ! >> >> route-map E-R permit 20 >> >> match tag 90 >> >> set tag 90 >> >> ! >> >> route-map E-R permit 25 >> >> match tag 110 >> >> set tag 110 >> >> ! >> >> route-map E-R permit 30 >> >> set tag 120 >> >> ! >> >> route-map R-E deny 10 >> >> match tag 90 >> >> ! >> >> route-map R-E permit 20 >> >> match tag 120 >> >> set tag 120 >> >> ! >> >> route-map R-E permit 25 >> >> match tag 110 >> >> set tag 110 >> >> ! >> >> route-map R-E permit 30 >> >> set tag 90 >> >> >> >> >> >> >> >> _______________________________________________ >> 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 >> >> >> > >
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