Think of it this way. Each routing protocol is basically seperate from each other. When you put distribute-lists in, you're telling *that protocol only* what to announce or accept, for that protocol only. So by putting the distribute-list under the 'router rip' process, you're telling RIP to take any OSPF 1 routes, and send them out in RIP. But that will not affect anything in the OSPF process itself. If you want to announce RIP routes into OSPF, you need to add distribute-lists into the 'router ospf 1' process. Make sense? Ken
________________________________ From: [email protected] on behalf of Di Bias, Steve Sent: Sun 10/16/2011 12:03 AM To: [email protected] Subject: [OSL | CCIE_RS] convoluted logic Hey Experts! It's really not that difficult but I'm trying to understand Cisco's convoluted logic with the following commands/scenario. Let's say we are doing mutual redistribution between OSPF and RIP on R1 (and possibly some other redistribution point as well) - For the sake of sanity we'll just look at the commands on R1. The main focus here is the "distribute-list RIP-ROUTES out ospf 1" which causes some confusion for me. router rip redistribute ospf 1 metric 3 distribute-list RIP-ROUTES out ospf 1 ip access-list standard RIP-ROUTES deny 10.10.10 0.0.0.255 deny 10.10,11.0 0.0.0.255 permit any >From the looks of it this command would prevent the 10 dot networks from being >advertised over to OSPF, however the opposite seems to be true. In other words >this command seems to control what RIP receives in from OSPF. This to me is convoluted and kind of gives me a headache. Can someone shed some light as to why it's this way and why I would use it? Thanks! UHS Confidentiality Notice: This e-mail message, including any attachments, is for the sole use of the intended recipient (s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution of this information is prohibited. If this was sent to you in error, please notify the sender by reply e-mail and destroy all copies of the original message. _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com *** Exempla Confidentiality Notice *** The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any other dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me immediately by replying to the message and deleting it from your computer. Thank you. *** Exempla Confidentiality Notice *** _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
