RE: OSPF Virtual Link Troubles

From: brian pitts (pittsbrian21@hotmail.com)
Date: Thu Sep 06 2007 - 22:25:50 ART


Sure,

Also when I do a debug ip ospf eve and adj I get this on r5 only when I put in
the command: area 25 virtual 2.2.2.2
When I do the same thing on r2 I get nothing.

10:17:42: OSPF: Build router LSA for area 0, router ID 5.5.5.5, seq
0x80000001

r5#sho runBuilding configuration...
Current configuration : 913 bytes!version 12.1no service
single-slot-reload-enableservice timestamps debug uptimeservice timestamps log
uptimeno service password-encryption!hostname r5ip subnet-zero!interface
Loopback0 ip address 5.5.5.5 255.255.255.0!interface Loopback1 ip address
51.5.5.5 255.255.255.0!interface Ethernet0 ip address 150.50.57.5
255.255.255.128!interface Serial0 ip address 150.50.25.5 255.255.255.0
encapsulation frame-relay ip ospf hello-interval 10 frame-relay map ip
150.50.25.2 501 broadcast frame-relay map ip 150.50.25.5 501 no frame-relay
inverse-arp!interface Serial1 ip address 150.50.9.5 255.255.255.192!router
ospf 1 router-id 5.5.5.5 log-adjacency-changes area 25 virtual-link 2.2.2.2
network 150.50.25.5 0.0.0.0 area 25 network 150.50.57.5 0.0.0.0 area 57!ip
classlessip http server!!line con 0 privilege level 15line aux 0line vty 0 4
login!end

r5#sho ip ospf database
       OSPF Router with ID (5.5.5.5) (Process ID 1)
                Router Link States (Area 25)
Link ID ADV Router Age Seq# Checksum Link
count2.2.2.2 2.2.2.2 1541 0x8000000B 0xA40B 25.5.5.5
5.5.5.5 1452 0x80000006 0xDB20 1
                Summary Net Link States (Area 25)
Link ID ADV Router Age Seq# Checksum150.50.1.0
2.2.2.2 802 0x80000008 0x481A150.50.12.0 2.2.2.2
802 0x80000008 0xC493150.50.246.0 2.2.2.2 548
0x8000000A 0x210B
                Router Link States (Area 57)
Link ID ADV Router Age Seq# Checksum Link
count5.5.5.5 5.5.5.5 1452 0x80000017 0xDEFC 17.7.7.7
7.7.7.7 634 0x80000390 0x66E6 1
                Net Link States (Area 57)
Link ID ADV Router Age Seq# Checksum150.50.57.7
7.7.7.7 634 0x80000014 0xD779
                Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag150.50.8.0
81.8.8.8 627 0x80000386 0x73EA 0

Date: Fri, 7 Sep 2007 03:04:33 +0200From: mounir.mohamed@gmail.comTo:
pittsbrian21@hotmail.comSubject: Re: OSPF Virtual Link TroublesCC:
ccielab@groupstudy.comCould you share the running config of R5 or at least the
output of Show ip ospd database ofr R5.
On 9/7/07, brian pitts <pittsbrian21@hotmail.com> wrote:
All,This is my first time using this and I was wonder if I could get some help
ina matter I'm having in my test lab..preparing for my CCIE R/S. I have a
network topology consisting of multiple OSPF areas and 1 areas don'thave ties
to the backbone area so a Virtual link is needed. This is what
Ihave.(r2)--area0, area 25 and area 246 --- RID= 2.2.2.2||(r5)--area 25,
and area 57 --- RID=5.5.5.5||(r7)--area 57 --- RID= 7.7.7.7So what I'm
trying to do is use area 25 as my transit area and extend area 0 to r2 so that
r7 area 57 has a connection to the backbone area 0.Creating a virtual link is
simeple so I don't know what I having such trouble.For some reason I can not
get the Virtual Link interface to come up. If I go to the r5 and do a sho ip
opsf you see the area 0 but says the interface isinactive. I have tried
changing RID and clearing the ospf process. Reloadingthe routers and many
other things with no avil.r2#router ospf 1 router-id 2.2.2.2
log-adjacency-changes area 25virtual-link 5.5.5.5 network 150.50.12.2
0.0.0.0 area 0 network 150.50.25.2 0.0.0.0 area 25network 150.50.246.2
0.0.0.0 area 246 neighbor 150.50.246.6 priority 1neighbor 150.50.246.4
priority 1r2#sho ip ospf vVirtual Link OSPF_VL8 to router 5.5.5.5 is down Run
as demand circuit DoNotAge LSA allowed. Transit area 25, Cost of using 65535
TransmitDelay is 1 sec, State DOWN, Timer intervals configured, Hello 10,
Dead 40,Wait 40, Retransmit 5r2#sho ip ospf nNeighbor ID Pri State
Dead Time Address Interface1.1.1.1 1 FULL/DR 00:00:34
150.50.12.1FastEthernet5.5.5.5 0 FULL/ - 00:00:38
150.50.25.5Serial0/0.256.6.6.6 1 FULL/DR 00:01:59
150.50.246.6Serial0/0.2464.4.4.4 1 FULL/DROTHER 00:01:47
150.50.246.4 Serial0/0.246r2#sho ip ospf Routing Process "ospf 1" with ID
2.2.2.2 Supports only singleTOS(TOS0) routes Supports opaque LSA Supports
Link-local Signaling (LLS) It is an area border router Initial SPF schedule
delay 5000 msecs Minimum hold timebetween two consecutive SPFs 10000 msecs
Maximum wait time between twoconsecutive SPFs 10000 msecs Incremental-SPF
disabled Minimum LSA interval 5 secs Minimum LSA arrival 1000 msecs LSA group
pacing timer 240 secs Interfaceflood pacing timer 33 msecs Retransmission
pacing timer 66 msecs Number ofexternal LSA 1. Checksum Sum 0x0193A2 Number of
opaque AS LSA 0. Checksum Sum 0x000000 Number of DCbitless external and opaque
AS LSA 0 Number of DoNotAgeexternal and opaque AS LSA 0 Number of areas in
this router is 3. 3 normal 0stub 0 nssa External flood list length 0 Area
BACKBONE(0) Number of interfaces in this area is 2 Area has no
authentication SPFalgorithm last executed 02:12:52.992 ago SPF
algorithm executed 3 timesArea ranges are Number of LSA 6. Checksum Sum
0x057112 Number of opaque link LSA 0. Checksum Sum 0x000000
Number of DCbitless LSA 0Number of indication LSA 0 Number of DoNotAge
LSA 0 Flood listlength 0 Area 25 Number of interfaces in this
area is 1 Area has no authentication SPF algorithm last executed
01:53:35.632 agoSPF algorithm executed 7 times Area ranges are
Number of LSA 5.Checksum Sum 0x045850 Number of opaque link LSA 0.
Checksum Sum 0x000000 Number of DCbitless LSA 0 Number of
indication LSA 0Number of DoNotAge LSA 0 Flood list length 0 Area
246 Numberof interfaces in this area is 1 Area has no
authentication SPF algorithm last executed 03:19:39.440 ago SPF
algorithm executed 3 timesArea ranges are Number of LSA 8. Checksum Sum
0x073F16 Number ofopaque link LSA 0. Checksum Sum 0x000000
Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge
LSA 0 Flood listlength 0r5#router ospf 1 router-id 5.5.5.5
log-adjacency-changes area 25virtual-link 2.2.2.2 network 150.50.25.5
0.0.0.0 area 25 network150.50.57.5 0.0.0.0 area 57r5#sho ip ospf v Virtual
Link OSPF_VL2 to router 2.2.2.2 is down Run asdemand circuit DoNotAge LSA
allowed. Transit area 25, Cost of using 65535Transmit Delay is 1 sec, State
DOWN, Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit
5r5#sho ip ospf nNeighbor ID Pri State Dead Time
AddressInterface7.7.7.7 1 FULL/DR 00:00:32 150.50.57.7
Ethernet02.2.2.2 100 FULL/DR 00:00:37
150.50.25.2Serial0r5#sho ip ospf Routing Process "ospf 1" with ID 5.5.5.5
Supports only singleTOS(TOS0) routes Supports opaque LSA SPF schedule delay 5
secs, Hold timebetween two SPFs 10 secs Minimum LSA interval 5 secs. Minimum
LSA arrival 1secs Number of external LSA 4. Checksum Sum 0x20F88 Number of
opaque AS LSA 0. Checksum Sum 0x0 Number of DCbitless external and opaque AS
LSA 0 Number ofDoNotAge external and opaque AS LSA 0 Number of areas in this
router is 3. 3normal 0 stub 0 nssa External flood list length 0 Area
BACKBONE(0) (Inactive) Number of interfaces in this area is 1
Area has noauthentication SPF algorithm executed 1 times Area
ranges areNumber of LSA 0. Checksum Sum 0x0 Number of opaque link LSA
0. Checksum Sum 0x0 Number of DCbitless LSA 0 Number of
indication LSA 0Number of DoNotAge LSA 0 Flood list length 0 Area 25
Numberof interfaces in this area is 1 Area has no authentication
SPF algorithm executed 20 times Area ranges are Number of LSA
15.Checksum Sum 0x7B8E8 Number of opaque link LSA 0. Checksum Sum
0x0Number of DCbitless LSA 0 Number of indication LSA 0 Number
of DoNotAge LSA 0 Flood list length 0 Area 57 Number
ofinterfaces in this area is 1 Area has no authentication
SPFalgorithm executed 12 times Area ranges are Number of LSA 8.
Checksum Sum 0x554E1 Number of opaque link LSA 0. Checksum Sum
0x0Number of DCbitless LSA 0 Number of indication LSA 0 Number
ofDoNotAge LSA 0 Flood list length 0Also I'm not sure why the cost on
the virtual link would be 65535
Thanks,Brian_________________________________________________________________
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at:http://www.groupstudy.com/list/CCIELab.html -- Best Reagrds,Mounir Mohamed



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