From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sat Mar 03 2007 - 13:25:40 ART
You do not need layer 2 reachability between all end-points to have the
routes in the routing table. You can have the routes but not be able to
reach the next hop (i.e. spoke to spoke).
--Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP) bdennis@internetworkexpert.com Internetwork Expert, Inc. http://www.InternetworkExpert.com Toll Free: 877-224-8987 Direct: 775-745-6404 (Outside the US and Canada)
On 3/3/07 6:21 AM, "Kim" <support@isolvesystems.com> wrote:
> Thanks Brian. I got it now. My misunderstanding. I am actually your student > testing out the compatibility you mentioned in the lab. You said that in both > broadcast and non-broadcast, all OSPF router must have layer 2 connectivity to > each other because the DR does not modify the next hop. > > I tested it. In the case R2 is the DR and it did modify the route it received > from R4 to R5. Am I missing anything? > > R2 > O 200.0.0.4 <http://200.0.0.4> [110/65] via 150.50.24.4 > <http://150.50.24.4> , 00:00:25, Serial0/0/0.24 > > R5 > O 200.0.0.4 <http://200.0.0.4> [110/129] via 150.50.100.2 > <http://150.50.100.2> , 00:00:10, Serial0/0/0 > > > > > > > On 3/2/07, Brian Dennis <bdennis@internetworkexpert.com > <mailto:bdennis@internetworkexpert.com> > wrote: >> Point-to-multipoint and broadcast network types are not compatible. >> >> http://www.cisco.com/warp/public/104/26.html#r1 >> >> -- >> >> Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP) >> bdennis@internetworkexpert.com >> >> Internetwork Expert, Inc. >> http://www.InternetworkExpert.com <http://www.internetworkexpert.com/> >> Toll Free: 877-224-8987 >> Direct: 775-745-6404 (Outside the US and Canada) >> >> >> >> On 3/2/07 4:12 PM, "Kim" < support@isolvesystems.com >> <mailto:support@isolvesystems.com> > wrote: >> >>> > I am configuring different Frame Relay and OSPF network types. For some >>> > reason, R5 and R6 do not install andy OSPF routes from R2(DR). >>> > >>> > *Below is the Frame Relay Config.* >>> > R2 >>> > interface Serial0/0/0.24 multipoint >>> > ip address 150.50.24.2 <http://150.50.24.2/> 255.255.255.0 >>> <http://255.255.255.0/> >>> > ip ospf network broadcast >>> > frame-relay map ip 150.50.24.4 <http://150.50.24.4/> 204 broadcast >>> > no frame-relay inverse-arp >>> > >>> > R4 >>> > interface Serial0/0/0 >>> > ip address 150.50.24.4 <http://150.50.24.4/> 255.255.255.0 >>> <http://255.255.255.0/> >>> > encapsulation frame-relay >>> > ip ospf network broadcast >>> > ip ospf priority 0 >>> > frame-relay map ip 150.50.24.2 <http://150.50.24.2/> 402 broadcast >>> > no frame-relay inverse-arp >>> > >>> > R2 >>> > interface Serial0/0/0.256 multipoint >>> > ip address 150.50.100.2 <http://150.50.100.2/> 255.255.255.192 >>> <http://255.255.255.192/> >>> > ip ospf network point-to-multipoint >>> > frame-relay map ip 150.50.100.5 <http://150.50.100.5/> 205 broadcast >>> > frame-relay map ip 150.50.100.6 <http://150.50.100.6/> 206 broadcast >>> > no frame-relay inverse-arp >>> > >>> > R5 >>> > interface Serial0/0/0 >>> > ip address 150.50.100.5 <http://150.50.100.5/> 255.255.255.192 >>> <http://255.255.255.192/> >>> > encapsulation frame-relay >>> > no ip route-cache cef >>> > no ip route-cache >>> > ip ospf network broadcast >>> > ip ospf hello-interval 30 >>> > ip ospf priority 0 >>> > no fair-queue >>> > frame-relay map ip 150.50.100.2 <http://150.50.100.2/> 502 broadcast >>> > no frame-relay inverse-arp >>> > >>> > R6 >>> > interface Serial0/0/0 >>> > ip address 150.50.100.6 <http://150.50.100.6/> 255.255.255.192 >>> <http://255.255.255.192/> >>> > encapsulation frame-relay >>> > ip ospf network broadcast >>> > ip ospf hello-interval 30 >>> > ip ospf priority 0 >>> > no fair-queue >>> > frame-relay map ip 150.50.100.2 <http://150.50.100.2/> 602 broadcast >>> > no frame-relay inverse-arp >>> > >>> > >>> > R2#sho ip ospf neigh >>> > >>> > Neighbor ID Pri State Dead Time Address >>> Interface >>> > 200.0.0.6 <http://200.0.0.6/> 0 FULL/ - 00:01:39 >>> 150.50.100.6 <http://150.50.100.6/> >>> > Serial0/0/0.256 >>> > 200.0.0.5 <http://200.0.0.5/> 0 FULL/ - 00:01:35 >>> 150.50.100.5 <http://150.50.100.5/> >>> > Serial0/0/0.256 >>> > 200.0.0.4 <http://200.0.0.4/> 0 FULL/DROTHER 00:00:36 >>> 150.50.24.4 <http://150.50.24.4/> >>> > Serial0/0/0.24 >>> > >>> > R4#sho ip osp neig >>> > >>> > Neighbor ID Pri State Dead Time Address >>> Interface >>> > 200.0.0.2 <http://200.0.0.2/> 1 FULL/DR 00:00:35 >>> 150.50.24.2 <http://150.50.24.2/> >>> > Serial0/0/0 >>> > >>> > R5#sho ip osp nei >>> > >>> > Neighbor ID Pri State Dead Time Address >>> Interface >>> > 200.0.0.2 <http://200.0.0.2/> 1 FULL/DR 00:01:51 >>> 150.50.100.2 <http://150.50.100.2/> >>> > Serial0/0/0 >>> > >>> > R6#sh ip osp nei >>> > >>> > Neighbor ID Pri State Dead Time Address >>> Interface >>> > 200.0.0.2 <http://200.0.0.2/> 1 FULL/DR 00:01:37 >>> 150.50.100.2 <http://150.50.100.2/> >>> > Serial0/0/0 >>> > R6# >>> > >>> > _______________________________________________________________________ >>> > Subscription information may be found at: >>> > http://www.groupstudy.com/list/CCIELab.html >>> <http://www.groupstudy.com/list/CCIELab.html>
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