it is tony since the FA address is set. review the FA address requirement for non-zero field. it is under the router ospf process on router R6.
________________________________________ From: Tony Singh [[email protected]] Sent: Thursday, June 20, 2013 3:27 PM To: Elie Raad Cc: Marko Milivojevic; OSL Routing and Switching Subject: Re: [OSL | CCIE_RS] OSPF Q Elie is the 3.3.65.5 address in the global rib, if it isn't then the LSA won't be considered for installation into the global rib from my testing... -- BR Tony Sent from my iPad On 20 Jun 2013, at 08:23, Elie Raad <[email protected]> wrote: > R4#sh ip ospf data external 5.5.5.5 > > OSPF Router with ID (4.4.4.4) (Process ID 1) > > Type-5 AS External Link States > > Routing Bit Set on this LSA > LS age: 767 > Options: (No TOS-capability, DC) > LS Type: AS External Link > Link State ID: 5.5.5.5 (External Network Number ) > Advertising Router: 1.1.1.1 > LS Seq Number: 80000002 > Checksum: 0xE0A6 > Length: 36 > Network Mask: /32 > Metric Type: 2 (Larger than any link state path) > TOS: 0 > Metric: 20 > Forward Address: 0.0.0.0 > External Route Tag: 0 > > Routing Bit Set on this LSA > LS age: 340 > Options: (No TOS-capability, DC) > LS Type: AS External Link > Link State ID: 5.5.5.5 (External Network Number ) > Advertising Router: 6.6.6.6 > LS Seq Number: 80000002 > Checksum: 0x2601 > Length: 36 > Network Mask: /32 > Metric Type: 2 (Larger than any link state path) > TOS: 0 > Metric: 20 > Forward Address: 3.3.65.5 > External Route Tag: 0 > traceroute 5.5.5.5 nu > 1 3.3.24.2 88 msec > 3.3.34.3 68 msec > 3.3.24.2 28 msec > 2 3.3.36.6 68 msec > 3.3.12.1 92 msec > 3.3.36.6 64 msec > The result is that OSPF is not using the FA address in this case even it is > set > > this is what i meant :) > > > R1 and R6 are ASBR > > > ________________________________ > From: Marko Milivojevic [[email protected]] > Sent: Wednesday, June 19, 2013 7:09 PM > To: Elie Raad > Cc: Saleh Batouq; OSL Routing and Switching > Subject: Re: [OSL | CCIE_RS] OSPF Q > > Well, you are mixing in two things here :-). The thread was originally about > the non-NSSA area. That's what I was answering about. > > In a case of the NSSA area, behavior is slightly different. NSSA ASBR will > set FA as the IP field to one of its own IP addresses advertised in OSPF > (preference given to Loopback). When the translating ABR creates Type 5 LSA, > this information will be preserved, allowing fo the optimal routing to the > ASBR. > > -- > Marko Milivojevic - CCIE #18427 (SP R&S) > Senior CCIE Instructor / Managing Partner - IPexpert > > > On Tue, Jun 18, 2013 at 10:55 PM, Elie Raad > <[email protected]<mailto:[email protected]>> wrote: > I mean in scenario where we have 2 Exits to O E1/E2 routes , OSPF will choose > to Replace the Advertising Router Attribute to the highest Router-id Value > between Both . in that case OSPF will route toward the one that is matched > inside the Advertising router value, this can cause sometimes sub-optimal > routing issue. > If the Forwarding Address value is set than OSPF will route toward the Fa > address field regardless of the one who did the T 7/5 Translation ensuring > Optimal path selection. > > what if this same route has been advertised but now with the Advertising > router field set and the Fa field Set. and there is no Type 7/5 Translation > since we Satisfied the below conditions for setting the FA to non-zero. the > question is what will OSPF choose as a next hope to get this route > installated in the RIB? > > > > > Regards, > > Elie Raad | Network and Systems Administrator > American University of Science and Technology > [email protected]<mailto:[email protected]> | Office: +961-1-218716 Ext: 396 > Office Hours: Mon- Fri 9:00 am-16:00 pm UTC+02:00 > ________________________________ > From: Marko Milivojevic [[email protected]<mailto:[email protected]>] > Sent: Tuesday, June 18, 2013 11:27 PM > To: Elie Raad > Cc: Saleh Batouq; OSL Routing and Switching > > Subject: Re: [OSL | CCIE_RS] OSPF Q > > What would OSPF use as next-hop where? > > -- > Marko Milivojevic - CCIE #18427 (SP R&S) > Senior CCIE Instructor / Managing Partner - IPexpert > > > On Tue, Jun 18, 2013 at 11:09 AM, Elie Raad > <[email protected]<mailto:[email protected]>> wrote: > What will ospf use as a next hop , the advertising router ip address or the > fa address > > Ignore any typos, sent from mobile device. > > On Jun 18, 2013, at 19:17, "Marko Milivojevic" > <[email protected]<mailto:[email protected]>> wrote: > > > Yes it is :-) > > On an ASBR that redistributes the route: > > 1) next-hop must be known by OSPF (enabled on the interface, or a more > specific OSPF route to it) > 2) exit interface for the next-hop must not be passive > 3) exit interface must be broadcast or non-broadcast > > If those are satisfied, redistributed route will have non-zero FA and FA will > be the next-hop of the redistributed route. > > -- > Marko Milivojevic - CCIE #18427 (SP R&S) > Senior CCIE Instructor / Managing Partner - IPexpert > > > On Mon, Jun 17, 2013 at 11:13 PM, Saleh Batouq > <[email protected]<mailto:[email protected]>> wrote: > I would also like to know!!! > > Best Regards, > > Saleh > > On Tue, Jun 18, 2013 at 9:22 AM, Elie Raad > <[email protected]<mailto:[email protected]>> wrote: > >> Hi Guys , >> >> is it possible to set the FA Address to non-zero for an O E1/E2 route? >> >> >> >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com<http://www.ipexpert.com> >> >> Are you a CCNP or CCIE and looking for a job? Check out >> www.PlatinumPlacement.com<http://www.PlatinumPlacement.com> >> >> http://onlinestudylist.com/mailman/listinfo/ccie_rs >> > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com<http://www.ipexpert.com> > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com<http://www.PlatinumPlacement.com> > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > > > _______________________________________________ > 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 > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ 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? 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