From: Zukque (zukque@gmail.com)
Date: Fri Dec 23 2005 - 23:53:11 GMT-3
Brian,
Sure OSPF is more intelligent that I am.
By my understanding, I think that OSPF tracks his database and see's this
route 3.3.3.0/24 is known via this advertising-router 183.1.0.3
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
2.2.2.0 183.1.0.2 1499 0x80000010 0xF7D8 0
3.3.3.0 183.1.0.3 466 0x80000001 0xEBEF 0
And to get to this ASBR he need another peace of information found in the
Summary Lsa
Summary ASB Link States (Area 3)
Link ID ADV Router Age Seq# Checksum
183.1.0.3 183.1.0.2 246 0x80000003 0xF191
So, (just thinking out laud here) like in BGP he need to know the next-hop.
And because router3 is the owner of the route, R4 knows that to get to R3
the best path is via S0 because 183.1.0.3 is reachable via 183.1.0.2, that
is directly connected to S0 (is like a recursive operation, from a recursive
information)??
I'm correct or I am missing something?
Thanks for your Help
On 12/23/05, Brian Dennis <bdennis@internetworkexpert.com> wrote:
>
> To answer your question, ask yourself this. How does R4 select one path
> over another to reach the 3.3.3.0/24 E2 route? More specifically what is
> the decision process that OSPF goes through on R4 to decide which path to
> take to reach the ASBR (R3 in this case) that is redistributing the
> 3.3.3.0/24 route into OSPF?
>
>
>
> HTH,
>
>
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> 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)
> ------------------------------
>
> *From:* Zukque [mailto:zukque@gmail.com]
> *Sent:* Friday, December 23, 2005 5:49 PM
> *To:* Brian Dennis
> *Cc:* Cisco certification
> *Subject:* Re: IP OSPF COST for IA's
>
>
>
> Ufffff but, R2 is adding 2.2.2.2 to the OSPF Domain, and R4 prefer this
> route via E0 (in Area 3), also I changed the Route Type at R3 Lo0, and
Still
> goes to R2 via S0
>
>
>
> 2.0.0.0/24 is subnetted, 1 subnets
> O E2 2.2.2.0 [110/20] via 183.1.42.2, 00:00:09, Ethernet0
> 3.0.0.0/32 is subnetted, 1 subnets
> O E2 3.3.3.3 [110/20] via 183.1.0.2, 00:00:09, Serial0
>
>
>
>
>
> Why R4 is nos using S0 to get to 2.2.2.2 (yes because the cost / and R4 is
> not Using A0 to get to 2.2.2.2)
>
>
>
>
>
> R4#show ip ospf interface | in is up | Cost: | Area
> Serial0 is up, line protocol is up
> Internet Address 183.1.0.4/24, Area 0
> Process ID 1, Router ID 183.1.0.4, Network Type POINT_TO_MULTIPOINT,
> Cost: 1000
> Ethernet0 is up, line protocol is up
> Internet Address 183.1.42.4/24, Area 3
> Process ID 1, Router ID 183.1.0.4, Network Type BROADCAST, Cost: 65
>
>
>
>
>
>
>
> On 12/23/05, *Brian Dennis* <bdennis@internetworkexpert.com> wrote:
>
> When you shut down the serial interface on R4, R4 is not a backbone router
> anymore since it's only interface in area 0 is now down. R4's path to
reach
> any network is now via the Ethernet. But when the serial interface is up,
> R4 MUST send the traffic to R2 irrespective of the cost across the
Ethernet.
>
>
> Traffic can not go like this: Area 3 -> Area 2. It must go Area 3 -> Area
> 0 -> Area 2.
>
> As per the RFC:
>
> 3.2. Inter-area routing
>
> When routing a packet between two non-backbone areas the
> backbone is used. The path that the packet will travel can be
> broken up into three contiguous pieces: an intra-area path from
> the source to an area border router, a backbone path between the
> source and destination areas, and then another intra-area path
> to the destination. The algorithm finds the set of such paths
> that have the smallest cost.
>
> Lastly if you are still confused I would highly recommend that you draw
> this out on paper and then consider how OSPF handles inter-area traffic.
>
> HTH,
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> 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)
>
> ________________________________________
> From: Zukque [mailto: zukque@gmail.com]
> Sent: Friday, December 23, 2005 5:05 PM
> To: Brian Dennis
> Cc: Cisco certification
> Subject: Re: IP OSPF COST for IA's
>
> Brian, Sorry but I do not get it
>
> R4>en
> R4#show ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
> Gateway of last resort is not set
> 2.0.0.0/24 is subnetted, 1 subnets
> O E2 2.2.2.0 [110/20] via 183.1.42.2, 05:06:12, Ethernet0
> 3.0.0.0/32 is subnetted, 1 subnets
> O IA 3.3.3.3 [110/1065] via 183.1.0.2, 05:06:12, Serial0
> 4.0.0.0/32 is subnetted, 1 subnets
> C 4.4.4.4 is directly connected, Loopback0
> 183.1.0.0/16 is variably subnetted, 4 subnets, 2 masks
> C 183.1.42.0/24 is directly connected, Ethernet0
> O 183.1.0.2/32 [110/1000] via 183.1.0.2, 05:12:17, Serial0
> O 183.1.0.3/32 [110/1064] via 183.1.0.2, 05:12:18, Serial0
> C 183.1.0.0/24 is directly connected, Serial0
> R4#show ip ospf
> Routing Process "ospf 1" with ID 183.1.0.4 and Domain ID 0.0.0.1
> Supports only single TOS(TOS0) routes
> Supports opaque LSA
> It is an area border and autonomous system boundary router
> Redistributing External Routes from,
> connected, includes subnets in redistribution
> SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
> Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs
> Number of external LSA 2. Checksum Sum 0x17F1B
> Number of opaque AS LSA 0. Checksum Sum 0x0
> Number of DCbitless external and opaque AS LSA 0
> Number of DoNotAge external and opaque AS LSA 0
> Number of areas in this router is 2. 2 normal 0 stub 0 nssa
> External flood list length 0
> Area BACKBONE(0)
> Number of interfaces in this area is 1
> Area has no authentication
> SPF algorithm executed 28 times
> Area ranges are
> Number of LSA 8. Checksum Sum 0x44A36
> Number of opaque link LSA 0. Checksum Sum 0x0
> Number of DCbitless LSA 0
> Number of indication LSA 0
> Number of DoNotAge LSA 0
> Flood list length 0
> Area 3
> Number of interfaces in this area is 1
> Area has no authentication
> SPF algorithm executed 18 times
> Area ranges are
> Number of LSA 13. Checksum Sum 0x5D8B5
> Number of opaque link LSA 0. Checksum Sum 0x0
> Number of DCbitless LSA 0
> Number of indication LSA 0
> Number of DoNotAge LSA 0
> Flood list length 0
> R4#show ip ospf interface
> Serial0 is up, line protocol is up
> Internet Address 183.1.0.4/24 , Area 0
> Process ID 1, Router ID 183.1.0.4, Network Type POINT_TO_MULTIPOINT, Cost:
> 1000
> Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
> Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
> Hello due in 00:00:03
> Index 1/1, flood queue length 0
> Next 0x0(0)/0x0(0)
> Last flood scan length is 2, maximum is 2
> Last flood scan time is 4 msec, maximum is 4 msec
> Neighbor Count is 1, Adjacent neighbor count is 1
> Adjacent with neighbor 183.1.0.2
> Suppress hello for 0 neighbor(s)
> Ethernet0 is up, line protocol is up
> Internet Address 183.1.42.4/24, Area 3
> Process ID 1, Router ID 183.1.0.4 , Network Type BROADCAST, Cost: 65
> Transmit Delay is 1 sec, State DROTHER, Priority 0
> Designated Router (ID) 183.1.0.2, Interface address 183.1.42.2
> No backup designated router on this network
> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
> Hello due in 00:00:04
> Index 1/2, flood queue length 0
> Next 0x0(0)/0x0(0)
> Last flood scan length is 1, maximum is 5
> Last flood scan time is 0 msec, maximum is 4 msec
> Neighbor Count is 1, Adjacent neighbor count is 1
> Adjacent with neighbor 183.1.0.2 (Designated Router)
> Suppress hello for 0 neighbor(s)
> R4#
> R4#
> R4#conf ter
> Enter configuration commands, one per line. End with CNTL/Z.
> R4(config)#interface serial 0
> R4(config-if)#shutdown
> R4(config-if)#^Z
> R4#
> R4#
> 3d21h: is_up: 0 state: 6 sub state: 1 line: 0
> 3d21h: %OSPF-5-ADJCHG: Process 1, Nbr 183.1.0.2 on Serial0 from FULL to
> DOWN, Neighbor Down: Interface down or detached
> 3d21h: RT: interface Serial0 removed from routing table
> 3d21h: RT: del 183.1.0.0/24 via 0.0.0.0, connected metric [0/0]
> 3d21h: RT: delete subnet route to 183.1.0.0/24
> 3d21h: RT: delete route to 3.3.3.3 via 183.1.0.2, Serial0
> 3d21h: RT: no routes to 3.3.3.3 , flushing
> 3d21h: RT: delete network route to 3.0.0.0
> 3d21h: RT: delete route to 183.1.0.2 via 183.1.0.2, Serial0
> 3d21h: RT: no routes to 183.1.0.2, flushing
> 3d21h: RT: delete route to 183.1.0.3 via 183.1.0.2, Serial0
> 3d21h: RT: no routes to 183.1.0.3, flushing
> R4#
> 3d21h: %SYS-5-CONFIG_I: Configured from console by console
> R4#
> R4#
> R4#
> 3d21h: %LINK-5-CHANGED: Interface Serial0, changed state to
> administratively down
> R4#
> R4#
> R4#
> 3d21h: is_up: 0 state: 6 sub state: 1 line: 0
> 3d21h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed
> state to down
> R4#
> 3d21h: is_up: 0 state: 6 sub state: 1 line: 0
> R4#
> R4#
> R4#
> 3d21h: RT: add 3.3.3.3/32 via 183.1.42.2 , ospf metric [110/130]
> 3d21h: RT: network 183.1.0.0 is now variably masked
> 3d21h: RT: add 183.1.0.2/32 via 183.1.42.2, ospf metric [110/65]
> 3d21h: RT: add 183.1.0.3/32 via 183.1.42.2, ospf metric [110/129]
> R4#
> R4#
> R4#show ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
> Gateway of last resort is not set
> 2.0.0.0/24 is subnetted, 1 subnets
> O E2 2.2.2.0 [110/20] via 183.1.42.2, 00:00:04, Ethernet0
> 3.0.0.0/32 is subnetted, 1 subnets
> O IA 3.3.3.3 [110/130] via 183.1.42.2, 00:00:05, Ethernet0
> 4.0.0.0/32 is subnetted, 1 subnets
> C 4.4.4.4 is directly connected, Loopback0
> 183.1.0.0/16 is variably subnetted, 3 subnets, 2 masks
> C 183.1.42.0/24 is directly connected, Ethernet0
> O IA 183.1.0.2/32 [110/65] via 183.1.42.2, 00:00:05, Ethernet0
> O IA 183.1.0.3/32 [110/129] via 183.1.42.2, 00:00:06, Ethernet0
> R4#
> R4#show ip int brief
> Interface IP-Address OK? Method Status Protocol
> BRI0 unassigned YES unset administratively down down
> BRI0:1 unassigned YES unset administratively down down
> BRI0:2 unassigned YES unset administratively down down
> Ethernet0 183.1.42.4 YES manual up up
> Loopback0 4.4.4.4 YES manual up up
> Serial0 183.1.0.4 YES manual administratively down down
> Serial1 unassigned YES unset administratively down down
>
>
>
> On 12/23/05, Brian Dennis < bdennis@internetworkexpert.com> wrote:
> Remember that all inter-area traffic must transit area 0 (an ABR).It
> doesn't matter what the cost is to reach R3's loopback which is in area 2
> across the Ethernet segment that is area 3.
>
> To reach a route in area 2 the traffic must use the area 0 path over the
> path across area 3.If you want to "transit" area 3 to reach area 2 look
> into using a virtual-link across the Ethernet or a tunnel.
>
> HTH,
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> 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)
> ________________________________________
> From: Zukque [mailto:zukque@gmail.com ]
> Sent: Friday, December 23, 2005 3:06 PM
> To: Brian Dennis
> Cc: Cisco certification
> Subject: Re: IP OSPF COST for IA's
>
> Thanks for your help, this is a very simple topology..sorry not good
> drawing also :)
>
> R2 is the Hub
> R3 and R4 are the spokes
> R4 is also conected to R2 via Ethernet
>
> Lo0 3.3.3.3/32
> !
> R3 -S0-------------------------------
> ---------------------------------------S0-R2 -Lo0 2.2.2.2/32
> R4-S0--------------------------------- |
> Eth-----------------------------------Eth
>
>
> R3 Lo0 belongs to area 2
> R2, R3, R4 S0s are in area 0
> R4 Eth to R2 Ethe si in area 3
> R2 is redistributing this Lo0 in OSPF using the default type
>
>
> ------------------------------------------------
> R2
> interface Ethernet0
> ip address 183.1.42.2 255.255.255.0
> !
> interface Serial0
> ip address 183.1.0.2 255.255.255.0
> encapsulation frame-relay
> ip ospf network point-to-multipoint
> no frame-relay inverse-arp
> frame-relay map ip 183.1.0.3 203 broadcast
> frame-relay map ip 183.1.0.4 204 broadcast
> !
> router ospf 1
> log-adjacency-changes
> redistribute connected subnets route-map Lo0
> network 183.1.0.0 0.0.0.255 area 0
> network 183.1.42.2 0.0.0.0 area 3
> !
> -----------------------------------------------
> R3:
> !
> interface Loopback0
> ip address 3.3.3.3 255.255.255.255
> interface Serial0
> ip address 183.1.0.3 255.255.255.0
> encapsulation frame-relay
> ip ospf network point-to-multipoint
> frame-relay map ip 183.1.0.2 302 broadcast
> frame-relay map ip 183.1.0.4 302
> no frame-relay inverse-arp
> router ospf 1
> log-adjacency-changes
> network 3.3.3.3 0.0.0.0 area 23
> network 183.1.0.0 0.0.0.255 area 0
> ------------------------------------------
> R4:
> interface Loopback0
> ip address 4.4.4.4 255.255.255.255
> ip ospf network point-to-point
> !
> interface Ethernet0
> ip address 183.1.42.4 255.255.255.0
> ip ospf priority 0
> interface Serial0
> ip address 183.1.0.4 255.255.255.0
> encapsulation frame-relay
> ip ospf network point-to-multipoint
> ip ospf cost 1000
> ip ospf priority 0
> frame-relay map ip 183.1.0.2 402 broadcast
> frame-relay map ip 183.1.0.3 402
> no frame-relay inverse-arp
>
> On 12/23/05, Brian Dennis < bdennis@internetworkexpert.com> wrote:
> Can you post your configurations and a little information about the
> topology?
>
> HTH,
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> 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)
> ________________________________________
> From: Zukque [mailto: zukque@gmail.com]
> Sent: Friday, December 23, 2005 1:37 PM
> To: Brian Dennis
> Cc: Cisco certification
> Subject: Re: IP OSPF COST for IA's
>
>
> Brain, but why to get to route 3.3.3.3 the router is choosing S0, E0 has a
> better cost
>
>
> On 12/23/05, Brian Dennis < bdennis@internetworkexpert.com > wrote:
> You have four OSPF routes in your routing table:
>
> 2.0.0.0/24 is subnetted, 1 subnets
> O E22.2.2.0 [110/20] via 183.1.0.2, 00:24:45, Serial0
> 3.0.0.0/32 is subnetted, 1 subnets
> O IA 3.3.3.3 [110/129] via 183.1.0.2, 00:24:45, Serial0
> O 183.1.0.2/32 [110/64] via 183.1.0.2, 00:31:22, Serial0
> O 183.1.0.3/32 [110/128] via 183.1.0.2, 00:31:24, Serial0
>
>
> You adjusted the OSPF cost on the interface to 1000:
>
> 2.0.0.0/24 is subnetted, 1 subnets
> O E2 2.2.2.0 [110/20] via 183.1.42.2 , 00:01:24, Ethernet0
> 3.0.0.0/32 is subnetted, 1 subnets
> O IA3.3.3.3 [110/1065] via 183.1.0.2, 00:01:24, Serial0
> 4.0.0.0/32 is subnetted, 1 subnets
> O 183.1.0.2/32 [110/1000] via 183.1.0.2, 00:01:24, Serial0
> O 183.1.0.3/32 [110/1064] via 183.1.0.2, 00:01:25, Serial0
>
> All of the intra and inter area routes cost have changed.The only
> route that did not change is the E2 route which as you know should not
> change.
>
> As per RFC 2328:
>
> Cost
> The link state cost of the path to the destination.For all
> paths except type 2 external paths this describes the entire
> path's cost.For Type 2 external paths, this field describes
> the cost of the portion of the path internal to the AS.This
> cost is calculated as the sum of the costs of the path's
> constituent links.
>
>
> HTH,
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> 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)
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com ] On Behalf Of
> Zukque
> Sent: Friday, December 23, 2005 11:50 AM
> To: Cisco certification
> Subject: IP OSPF COST for IA's
>
> Dears
>
>
> Why IA OSPF route's are not affected with the ip ospf cost command?
> Is there a preference for Intra / Inter / External Route? Please can you
> show me where I can find this in 2328
> Thanks!
>
>
>
> That is: (take a look at 3.3.3.3)
>
> R#show ip ospf neighbor
>
> Neighbor ID Pri State Dead Time Address
> Interface
> 183.1.0.2 1 FULL/-00:01:51 183.1.0.2
> Serial0
> 183.1.0.2 1 FULL/BDR00:00:33 183.1.42.2
> Ethernet0
>
> R#show ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
> inter
> area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
> Gateway of last resort is not set
>
> 2.0.0.0/24 is subnetted, 1 subnets
> O E22.2.2.0 [110/20] via 183.1.0.2 , 00:24:45, Serial0
> 3.0.0.0/32 is subnetted, 1 subnets
> O IA 3.3.3.3 [110/129] via 183.1.0.2, 00:24:45, Serial0
> 4.0.0.0/32 is subnetted, 1 subnets
> C 4.4.4.4 is directly connected, Loopback0
> 183.1.0.0/16 is variably subnetted, 4 subnets, 2 masks
> C 183.1.42.0/24 is directly connected, Ethernet0
> O 183.1.0.2/32 [110/64] via 183.1.0.2, 00:31:22, Serial0
> O 183.1.0.3/32 [110/128] via 183.1.0.2, 00:31:24, Serial0
> C 183.1.0.0/24 is directly connected, Serial0
>
> R#
> R(config)#interface s0
> R(config-if)#ip ospf cost 1000
> R(config-if)#^Z
>
> R#clear ip route *
>
> 3d16h: RT: add 183.1.42.0/24 via 0.0.0.0, connected metric [0/0]
> 3d16h: RT: add 4.4.4.4/32 via 0.0.0.0, connected metric [0/0]
> 3d16h: RT: add 183.1.0.0/24 via 0.0.0.0, connected metric [0/0]
> 3d16h: RT: network 183.1.0.0 is now variably masked
> 3d16h: RT: add 183.1.0.2/32 via 183.1.0.2, ospf metric [110/1000]
> 3d16h: RT: add 183.1.0.3/32 via 183.1.0.2, ospf metric [110/1064]
> 3d16h: RT: add 3.3.3.3/32 via 183.1.0.2, ospf metric [110/1065]
> 3d16h: RT: add 2.2.2.0/24 via 183.1.42.2, ospf metric [110/20]
>
> R#show ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
> inter
> area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
> Gateway of last resort is not set
>
> 2.0.0.0/24 is subnetted, 1 subnets
> O E22.2.2.0 [110/20] via 183.1.42.2 , 00:01:24, Ethernet0
> 3.0.0.0/32 is subnetted, 1 subnets
> O IA 3.3.3.3 [110/1065] via 183.1.0.2, 00:01:24, Serial0
> 4.0.0.0/32 is subnetted, 1 subnets
> C 4.4.4.4 is directly connected, Loopback0
> 183.1.0.0/16 is variably subnetted, 4 subnets, 2 masks
> C 183.1.42.0/24 is directly connected, Ethernet0
> O 183.1.0.2/32 [110/1000] via 183.1.0.2, 00:01:24, Serial0
> O 183.1.0.3/32 [110/1064] via 183.1.0.2, 00:01:25, Serial0
> C 183.1.0.0/24 is directly connected, Serial0
>
> R#show ip ospf database
>
> OSPF Router with ID ( 183.1.0.4) (Process ID 1)
>
> Router Link States (Area 0)
>
> Link ID ADV RouterAge Seq# Checksum Link
> count
> 183.1.0.2 183.1.0.2 427 0x80000010 0x4A1C 3
> 183.1.0.3 183.1.0.3 14440x80000007 0xDD56 2
> 183.1.0.4 183.1.0.4 232 0x80000013 0xEE87 2
>
> Summary Net Link States (Area 0)
>
> Link ID ADV RouterAge Seq# Checksum
> 3.3.3.3 183.1.0.3 17010x80000002 0x77FB
> 183.1.42.0183.1.0.2 427 0x8000000B 0xBD69
> 183.1.42.0183.1.0.4 14800x80000009 0x4014
>
> Summary ASB Link States (Area 0)
>
> Link ID ADV RouterAge Seq# Checksum
> 183.1.0.2 183.1.0.4 19440x80000004 0xF788
> 183.1.0.4 183.1.0.2 179 0x80000004 0x65ED
>
> Router Link States (Area 3)
>
> Link ID ADV RouterAge Seq# Checksum Link
> count
> 183.1.0.2 183.1.0.2 510x8000000A 0x66CA 2
> 183.1.0.4 183.1.0.4 530x8000000B 0xB8C9 2
>
> Net Link States (Area 3)
>
> Link ID ADV RouterAge Seq# Checksum
> 183.1.42.2 183.1.0.2 510x80000001 0x1D06
> 183.1.42.4 183.1.0.4 959 0x80000005 0xEC2E
>
> Summary Net Link States (Area 3)
>
> Link ID ADV RouterAge Seq# Checksum
> 3.3.3.3 183.1.0.2 16910x80000002 0xFF34
> 3.3.3.3 183.1.0.4 228 0x80000004 0x2321
> 183.1.0.2 183.1.0.2 11940x80000004 0x853F
> 183.1.0.2 183.1.0.4 228 0x80000004 0xAD29
> 183.1.0.3 183.1.0.2 11940x80000004 0xFD85
> 183.1.0.3 183.1.0.4 228 0x80000004 0x2570
> 183.1.0.4 183.1.0.2 429 0x80000002 0xF78C
> 183.1.0.4 183.1.0.4 14820x80000002 0x6959
>
> Summary ASB Link States (Area 3)
>
> Link ID ADV RouterAge Seq# Checksum
> 183.1.0.2 183.1.0.4 228 0x80000004 0x9F36
> 183.1.0.4 183.1.0.2 429 0x80000002 0xE999
>
> Type-5 AS External Link States
>
> Link ID ADV RouterAge Seq# Checksum Tag
> 2.2.2.0 183.1.0.2 429 0x80000004 0x10CC 0
> 4.4.4.4 183.1.0.4 214 0x80000004 0x933D 0
>
> Thanks !!!!
>
> _______________________________________________________________________
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This archive was generated by hypermail 2.1.4 : Mon Jan 09 2006 - 07:07:52 GMT-3