Ok Thanks Tony. I will come back to you with detailed information.
Regards, Thirumavalavan Consultant -----Original Message----- From: Tony Li [mailto:[email protected]] Sent: Thursday, December 29, 2011 3:14 PM To: Thirumavalavan Periyannan Cc: Acee Lindem; [email protected] Subject: Re: [OSPF] Clarification of DR & BDR Processing in OSPFV3 This list is intended for discussing spec issues and is probably not the best place to debug the problem. I suggest you contact the developer for the other implementation. If you're unaware of who the developer is, then if you can tell us the OS and version that you're trying to work with, we may be able to direct you. Tony On Dec 28, 2011, at 10:19 PM, Thirumavalavan Periyannan wrote: > Hi Acee, > > I used distribution list to drop the routing update packet (coming > from DR) only with this destination address "ALLSPFRouters" at Backup > designated router and BDR received (without dropping) a routing update > packet with destination address ALLDRouters > > And I checked the routing table; Expected route is not installed in routing table that means BDR couldn't process the update packet with destination address as "ALLDRouters" > > Regards, > Thirumavalavan > Consultant > <image001.gif> > > From: Acee Lindem [mailto:[email protected]] > Sent: Tuesday, December 27, 2011 11:54 PM > To: Thirumavalavan Periyannan > Cc: <[email protected]> > Subject: Re: [OSPF] Clarification of DR & BDR Processing in OSPFV3 > > Hi Thirumalvalavan, > See inline. > On Dec 27, 2011, at 6:46 AM, Thirumavalavan Periyannan wrote: > > > Hi All, > > I have a doubt in DR and BDR process in OSPFV3. > > " AllDRouters: > This multicast address has been assigned the value FF02::6. > Both the Designated Router and Backup Designated Router must be > prepared to receive packets destined to this address. Certain > OSPF protocol packets are sent to this address during the > flooding procedure." > > RFC says, DR & BDR must be prepared to receive packets destined to > FF02::6, Here is that Prepared means to say BDR needs to process the packet with destination address FF02::6 (ALLDRouters)? > > Yes. This is somewhat implementation and network interface type specific but it implies that the packet will be received and passed to the OSPFv3 instance's receive queue. > For example, on ethernet this implies that packets sent the Multicast MAC 33:33:00:00:00:06. > > > > In CISCO routers, BDR is not processing the packet with destination address "ALLDRouters". > But the same BDR when it receives an update packet with destination address as "ALLSPFRouters", it is processing the packet. > > The receiving OSPFv3 router should process all packets addressed to FF02::6. I'd advise you turn on some debugs on the both the sending and receiving OSPFv3 routers to determine whether or not the packet is being rejected. > > Hope this helps, > Acee > > > > So I want a clarification of the above lines in the standard. > > Regards, > Thirumavalavan > Consultant > > > _______________________________________________ > OSPF mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/ospf _______________________________________________ OSPF mailing list [email protected] https://www.ietf.org/mailman/listinfo/ospf
