I'm not sure we have enough detail of the scenario to answer the first question... But two options pop into my head... First would be going to the interface and simply changing the network type with "isis network point-to-point" although that has nothing to do with L1 or L2 specific information, but can assist in speeding up detection of failures. The second option may be the fast-flood option which does give specific reference to which PDU types by using "fast-flood l2" under the ISIS routing process configuraiton. *shrug* As for the second question, none of the labs to my knowledge give any reason to have different paths. You are correct that the multicast address family is for RPF information, and if they follow the same path, then technically no, you don't need to have the information in both places. It doesn't hurt, but is not required. HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M #153, JNCIS-ER, CISSP, et al. CCSI/JNCI-M/JNCI-ER VP - Technical Training - IPexpert, Inc. IPexpert Sr. Technical Instructor A Cisco Learning Partner - We Accept Learning Credits! [EMAIL PROTECTED] Telephone: +1.810.326.1444 Fax: +1.810.454.0130 http://www.ipexpert.com _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of VARGAS, Carlos Sent: Monday, November 26, 2007 1:09 PM To: [email protected] Subject: [OSL | CCIE_SP] IS-IS & MSDP/MP-BP Hi all Two questions for anyone can assists me: a) For two routers connected through ethernet, how you would configure for this inquiry? "Configure IS-IS between Rx and Ry to discover quickly the link fail, but no increasing bandwith and CPU use. Between Rx and Ry are flowing only Level 2 PDUs". b) I see in all IPExpert configurations, when MSDP is configured, the same prefix that are publicated on BPG ipv4 unicast address family are configured on BGP ipv4 multicast address family too. I know that it's for RPFcheck, but, my question is we need to put the prefix on both RIBs, or it's only a best practice for this case? Thanks a lot. Carlos Vargas
