From: brian pitts (pittsbrian21@hotmail.com)
Date: Fri Sep 07 2007 - 01:07:19 ART
All,
I finaly figured it out. link types were different.
On the connected link between r2 and r5. One was setup as a network type of
point-to-point while the other one was setup as broadcast. I think I dug
myself my own rat hole on this one, because at the begining when I initially
configured OSPF I hade problems with router adjacencies and when I debuged I
saw mis-matches hello timeers so I changed the hello timers instead of the
type of network link it was so it totally missed up the virtual links when I
had to configure them.
Lesson learn 1 - when you see miss-matched hello timers look at the type of
link it is first. Then change the link type to change the hello timers. :-)
Thanks,
Brian
> From: pittsbrian21@hotmail.com> To: mounir.mohamed@gmail.com> CC:
ccielab@groupstudy.com> Subject: RE: OSPF Virtual Link Troubles> Date: Thu, 6
Sep 2007 20:25:50 -0500> > 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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