Forgot to answer your other question. You can use configure on the interface or under the routing process. It does not make much difference. I guess it is what you feel comfortable with. I have got into the habbit of doing the following
rouer ospf 1 passive-interface default no passive-interface FastEthernet0/0 no passive-interface Serial0/2/0 network 192.168.9.9 0.0.0.0 area 9 network 172.16.90.9 0.0.0.0 area 9 network 172.16.69.2 0.0.0.0 area 0 Concepts 1.) i passive the interfaces by default and manually do no passive-interface for the interfaces i want to run OSPF on. 2.) I use the 0.0.0.0 wild card mask to ensure i dont turn ospf on for an interface that i didnt intend to. 3.) My preference is to configure under the process unless otherwise told so i can do "show run | sec router ospf" and see "Most" of the revalant information. Note that cost , authentication, mtu ignore and other things are interface only commands. Hope that helps Aaron On Sun, Jun 26, 2011 at 10:21 PM, Aaron Moreck <[email protected]> wrote: > Christopher, > > From your first config you put loop back 0 in OSPF area 9 which is > equivalant to the "network 192.168.9.9 area 9" under the ospf process. You > didnt see the E2 route from redistribtuion because the O or OIA will win > over the E2 when being installed in the rib. > > When you went from the interface config to the network statement you onely > did network statements for the serial and fast ethernet not the loop > back. As soon as you did "no ip ospf 1 area 9" on the loop back of router > 9 and didnt put the "network 192.168.9.9 0.0.0.0 area 9 under the process", > the O and OIA routes went away only leaving the E2 route. > > > Aaron > > > On Sun, Jun 26, 2011 at 4:17 PM, Christopher Lemish < > [email protected]> wrote: > >> Guys, >> >> I found an issue when configuring OSPF via the interface as opposed to >> using the network command. Can someone explain why this happened and how we >> should know when to use the "interface OSPF config" vs. the "network cmd >> OSPF config"? >> Summary: When using the interface OSPF cmd, the OE2 route did not show up >> on R5, it showed as an IA route. When I changed my advertisting of R9's >> connected networks (netw 172.16.69.0 0.0.0.255 area 9), it showed up as an >> OSPF OE2 route on R6 and R5. >> >> Here was the test: >> >> //Went through the task, configured my route map, redistributing Loopback >> 0 into OSPF (At this point, I am using "ip ospf 1 area 9" on S0/2/0 & lo0) >> R9(config-if)#do sh run | s ospf|inter >> interface Loopback0 >> ip address 192.168.9.9 255.255.255.255 >> ip ospf 1 area 9 >> interface FastEthernet0/0 >> ip address 172.16.90.9 255.255.255.240 >> ip ospf 1 area 9 >> duplex auto >> speed auto >> interface FastEthernet0/1 >> no ip address >> shutdown >> duplex auto >> speed auto >> interface Serial0/2/0 >> ip address 172.16.69.2 255.255.255.252 >> encapsulation ppp >> ip ospf 1 area 9 >> no fair-queue >> ppp authentication chap >> ppp chap password 7 030D4B0E1E1F245E5A >> interface Serial0/2/1 >> no ip address >> shutdown >> router ospf 1 >> router-id 192.168.9.9 >> log-adjacency-changes >> redistribute connected subnets route-map RedistL0 >> match interface Loopback0 >> R9(config-if)#do sh ip ospf nei >> Neighbor ID Pri State Dead Time Address >> Interface >> 192.168.6.6 0 FULL/ - 00:00:36 >> 172.16.69.1<36%20%20%20%20172.16.69.1> Serial0/2/0 >> >> >> R5(config-router)#do sh ip ro os >> 192.168.9.0/32 is subnetted, 1 subnets >> O IA 192.168.9.9 [110/66] via 172.16.200.6, 00:00:03, FastEthernet0/0 >> //shows up as an IA route >> 172.16.0.0/16 is variably subnetted, 5 subnets, 5 masks >> O IA 172.16.90.0/28 [110/66] via 172.16.200.6, 00:00:03, >> FastEthernet0/0 >> O IA 172.16.69.0/30 [110/65] via 172.16.200.6, 00:00:03, >> FastEthernet0/0 >> 192.168.6.0/32 is subnetted, 1 subnets >> O IA 192.168.6.6 [110/2] via 172.16.200.6, 00:12:25, FastEthernet0/0 >> 192.168.7.0/32 is subnetted, 1 subnets >> O 192.168.7.7 [110/2] via 172.16.200.7, 00:12:45, FastEthernet0/0 >> 192.168.2.0/32 is subnetted, 1 subnets >> O IA 192.168.2.2 [110/65] via 172.16.0.2, 00:11:55, Serial0/1/0 >> >> >> R6(config-router)#do sh ip ro os >> 192.168.9.0/32 is subnetted, 1 subnets >> O 192.168.9.9 [110/65] via 172.16.69.2, 00:02:06, Serial0/2/0 >> //R6 shows it as an internal route >> 172.16.0.0/16 is variably subnetted, 6 subnets, 6 masks >> O 172.16.25.0/24 [110/65] via 172.16.200.5, 00:14:32, >> FastEthernet0/0 >> O 172.16.90.0/28 [110/65] via 172.16.69.2, 00:02:06, Serial0/2/0 >> 192.168.5.0/32 is subnetted, 1 subnets >> O IA 192.168.5.5 [110/2] via 172.16.200.5, 00:14:32, FastEthernet0/0 >> 192.168.7.0/32 is subnetted, 1 subnets >> O 192.168.7.7 [110/2] via 172.16.200.7, 00:14:32, FastEthernet0/0 >> 192.168.2.0/32 is subnetted, 1 subnets >> O IA 192.168.2.2 [110/65] via 172.16.0.2, 00:14:02, Serial0/1/0 >> >> //Changed my config as it is presented in the DSG >> R9(config-if)#int lo0 >> R9(config-if)#no ip ospf 1 area 9 >> R9(config-if)#int s0/2/0 >> R9(config-if)#no ip ospf 1 area 9 >> R9(config-if)# >> *Jun 26 07:52:18.991: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.6.6 on >> Serial0/2/0 from FULL to DOWN, Neighbor Down: Interface down or detached >> R9(config-if)#router ospf 1 >> R9(config-router)#netw 172.16.69.0 0.0.0.255 area 9 >> *Jun 26 07:52:34.575: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.6.6 on >> Serial0/2/0 from LOADING to FULL, Loading Done >> R9(config-router)#netw 172.16.90.0 0.0.0.255 area 9 >> R9(config-router)#do sh ip ospf nei >> //Showing my adjacency after the change >> Neighbor ID Pri State Dead Time Address >> Interface >> 192.168.6.6 0 FULL/ - 00:00:33 >> 172.16.69.1<33%20%20%20%20172.16.69.1> Serial0/2/0 >> >> //Now R6 shows R9's Lo0 as an E2 route >> R6(config-router)#do sh ip ro os >> 192.168.9.0/32 is subnetted, 1 subnets >> O E2 192.168.9.9 [110/20] via 172.16.69.2, 00:00:52, Serial0/2/0 >> //Now R6 & R5 show the route to R9's loopback as OE2 & redistributed >> 172.16.0.0/16 is variably subnetted, 6 subnets, 6 masks >> O 172.16.25.0/24 [110/65] via 172.16.200.5, 00:16:08, >> FastEthernet0/0 >> O 172.16.90.0/28 [110/65] via 172.16.69.2, 00:03:42, Serial0/2/0 >> 192.168.5.0/32 is subnetted, 1 subnets >> O IA 192.168.5.5 [110/2] via 172.16.200.5, 00:16:08, FastEthernet0/0 >> 192.168.7.0/32 is subnetted, 1 subnets >> O 192.168.7.7 [110/2] via 172.16.200.7, 00:16:08, FastEthernet0/0 >> 192.168.2.0/32 is subnetted, 1 subnets >> O IA 192.168.2.2 [110/65] via 172.16.0.2, 00:15:38, Serial0/1/0 >> //Therefore, R5 shows it as an E2 route as well >> >> R5(config-router)#do sh ip ro os >> 192.168.9.0/32 is subnetted, 1 subnets >> O E2 192.168.9.9 [110/20] via 172.16.200.6, 00:01:35, FastEthernet0/0 >> //Now R6 & R5 show the route to R9's loopback as OE2 & redistributed >> 172.16.0.0/16 is variably subnetted, 5 subnets, 5 masks >> O IA 172.16.90.0/28 [110/66] via 172.16.200.6, 00:04:24, >> FastEthernet0/0 >> O IA 172.16.69.0/30 [110/65] via 172.16.200.6, 00:04:24, >> FastEthernet0/0 >> 192.168.6.0/32 is subnetted, 1 subnets >> O IA 192.168.6.6 [110/2] via 172.16.200.6, 00:16:46, FastEthernet0/0 >> 192.168.7.0/32 is subnetted, 1 subnets >> O 192.168.7.7 [110/2] via 172.16.200.7, 00:17:06, FastEthernet0/0 >> 192.168.2.0/32 is subnetted, 1 subnets >> O IA 192.168.2.2 [110/65] via 172.16.0.2, 00:16:16, Serial0/1/0 >> >> >> Thank you, >> Chris >> >> [ >> https://webmail.blackbox.com/owa/attachment.ashx?id=RgAAAABX%2bzrAOIhhTKsGfsmsKM%2fWBwB2C4ufLoSBRKYuefQ4bb5VA1mZRBowAADfnGilB%2fyFQqNTYxhm11nnACriB%2beYAAAJ&attcnt=1&attid0=EADDdQVcpz%2fuS4ZJKn0f1Fuw >> ]< >> http://www.facebook.com/home.php#!/pages/Black-Box-Network-Services-Long-Island-Voice/117226961676137> >> [ >> https://webmail.blackbox.com/owa/attachment.ashx?id=RgAAAABX%2bzrAOIhhTKsGfsmsKM%2fWBwB2C4ufLoSBRKYuefQ4bb5VA1mZRBowAADfnGilB%2fyFQqNTYxhm11nnACriB%2beYAAAJ&attcnt=1&attid0=EAD9HumqwrBlQJ9uJ5SBtEr3] >> <http://linkd.in/gxJOgY> [ >> https://webmail.blackbox.com/owa/attachment.ashx?id=RgAAAABX%2bzrAOIhhTKsGfsmsKM%2fWBwB2C4ufLoSBRKYuefQ4bb5VA1mZRBowAADfnGilB%2fyFQqNTYxhm11nnACriB%2beYAAAJ&attcnt=1&attid0=EADvORIBrgGcT5wWn7hGQlLs] >> <http://twitter.com/bbnslivoice> [ >> https://webmail.blackbox.com/owa/attachment.ashx?id=RgAAAABX%2bzrAOIhhTKsGfsmsKM%2fWBwB2C4ufLoSBRKYuefQ4bb5VA1mZRBowAADfnGilB%2fyFQqNTYxhm11nnACriB%2beYAAAJ&attcnt=1&attid0=EAAXlrLorBo2SZm9%2fk1QYSJt] >> <http://blackboxnetw >> orkslivoice.wordpress.com/> >> ______________________________ >> Christopher Lemish, CCNP/ MCSE >> Network Engineer >> Blackbox Network Services >> Long Island Voice >> 6000 New Horizons Boulevard >> Amityville, NY 11701 >> Mobile: 516-790-1525 >> Email: [email protected]<mailto: >> [email protected]> >> HTTP: www.blackbox.com<http://www.blackbox.com/> >> >> ________________________________ >> This email and any files transmitted with it are confidential and are >> intended for the sole use of the individual to whom they are addressed. >> Black Box Corporation reserves the right to scan all e-mail traffic for >> restricted content and to monitor all e-mail in general. 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