OSPF not sending v6 default-route - Cant figure out why.

[graham smart]

Hi Guys,

I have two routers , One in area0/1 and one in area1

The router in area1 doesnt seem to be getting a default route from the router in area0/1

RouterB ( A juniper E120 ) has a neighbor relationship and gets other routes but refuses to recieve a default..

Im a little stuck how to troubleshoot. Ive checked the config and other devices seem to get a default ::0 but this routerB refuses to ( Even though the configuration appears identicle? How can I verify that the cisco RouterA is indeed advertising a ipv6 default?

For simplicity..

Here is how its setup..

RouterB(Area1)--------------------------------RouterA(Area 0/1)--------> Net

RouterA has a default in its table.

sh ipv6 route ::/0

Routing entry for ::/0

  Known via "ospf 7", distance 110, metric 2005

  Tag 7, type extern 1

... Etc

RouterA config:

ipv6 router ospf 7

log-adjacency-changes

auto-cost reference-bandwidth 100000

area 1 stub

default-information originate metric 2000 metric-type 1

passive-interface default

no passive-interface TenGigabitEthernet2/3

no passive-interface TenGigabitEthernet3/2

no passive-interface GigabitEthernet9/47

no passive-interface Port-channel3

no passive-interface Vlan200

[Peter Paluch]

Hi Graham,

Hey, we're meeting again

You have an interesting problem here. Just wondering: as the Area 1 is configured as stub, the default route should be injected into it by RouterA automatically, without actually needing the default-information originate command. Its presence should actually not influence the Area 1 at all, because it results in originating LSA-5 which is not allowed in stubby areas.

A couple of questions:

• What does show ipv6 ospf neighbor command say on RouterB?
• What does the show ipv6 ospf summary 0.0.0.0 say on both RouterB and RouterA?

Best regards,

Peter

[graham smart]

Hey again

Im looking into a fairly badly implemented v6 network and its got some of the oddest problems ive never come across before

Anyway, Hope this helps?

RouterA ( Both routers connect to each other via a vlan interface )

sh ipv6 ospf neighbor | inc 95.163

xxx.125.95.163    1   FULL/BDR        00:00:07    838860810       Vlan200

#show ipv6 ospf summary 0.0.0.0

                              ^

% Invalid input detected at '^' marker.

#show ipv6 ospf summary        

OSPFv3 Process 7, Summary-prefix

    Not configured

RouterB

sh ipv6 ospf neighbors

Neighbor ID     Pri  State            Dead Time Intf ID     Interface

xxx.125.95.30   1    FULL/DR          00:00:07  0x68 GigabitEthernet1/0/0

#show ipv6 ospf summary 0.0.0.0

                              ^

% Invalid input detected at '^' marker.

[Peter Paluch]

Hello Graham,

Oh, I apologize about the typo in the command. It should read:

show ipv6 ospf database inter-area

Sorry! I'm still thinking too much IPv4...

Best regards,

Peter

[graham smart]

Its ok the difference with v4 and v6 commands are slowly driving me insane.

RouterA: xxx.125.95.30

RouterB: xxx.125.95.163

Anyway..

show ipv6 ospf database inter-area       

% Incomplete command.

Not sure what your after, So heres something:

show ipv6 ospf database inter-area prefix ::/0

            OSPFv3 Router with ID (XXX.125.95.30) (Process ID 7)

                Inter Area Prefix Link States (Area 1)

  LS age: 1301

  LS Type: Inter Area Prefix Links

  Link State ID: 0

  Advertising Router: xxx.125.95.30

  LS Seq Number: 80006EBE

  Checksum: 0x2F13

  Length: 28

  Metric: 1

  Prefix Address: ::

  Prefix Length: 0, Options: None

  LS age: 326

  LS Type: Inter Area Prefix Links

  Link State ID: 0

  Advertising Router: xxx.212.125.95.47

  LS Seq Number: 80001515

  Checksum: 0x280C

  Length: 28

  Metric: 1

  Prefix Address: ::

  Prefix Length: 0, Options: None

(JE120) ( RouterB )

show ipv6 ospf database intra-area-prefix

      V3 Intra Area Prefix Link States (Area 0.0.0.1)

  LS age: 1394

  LS Type: Intra Area Prefix Links

  Link State ID: 0.1.160.0

  Advertising Router: XXX.125.95.30

  LS Seq Number: 0x8000085b

  Checksum: 0x6243

  Length: 44

  Numer of Prefixes 1

  Referenced LSA Type 0x    2002

  Referenced LSA Advertising Router XXX.125.95.30

  Referenced LSA ID 104

  Prefixes

       XXXX:ed0:0:b:: / 64       options 0       metric 0

  LS age: 3600

  LS Type: Intra Area Prefix Links

  Link State ID: 0.0.0.1

  Advertising Router: XXX.125.95.163

  LS Seq Number: 0x800073f3

  Checksum: 0x7517

  Length: 64

  Numer of Prefixes 2

  Referenced LSA Type 0x    2001

  Referenced LSA Advertising Router XXX.125.95.163

  Referenced LSA ID 0

  Prefixes

       XXXX:ed0::f / 128       options 2       metric 0

       XXXX:ed0:0:b:: / 64       options 0       metric 100

  LS age: 3600

  LS Type: Intra Area Prefix Links

  Link State ID: 0.0.0.8

  Advertising Router: XXX.125.95.163

  LS Seq Number: 0x80000007

  Checksum: 0x6957

  Length: 44

  Numer of Prefixes 1

  Referenced LSA Type 0x    2002

  Referenced LSA Advertising Router XXX.125.95.163

  Referenced LSA ID 838860807

  Prefixes

       XXXX:ed0:0:a:: / 64       options 0       metric 0

  LS age: 2230

  LS Type: Intra Area Prefix Links

  Link State ID: 0.0.0.11

  Advertising Router: XXX.125.95.163

  LS Seq Number: 0x80005290

  Checksum: 0x7964

  Length: 44

  Numer of Prefixes 1

  Referenced LSA Type 0x    2002

  Referenced LSA Advertising Router XXX.125.95.163

  Referenced LSA ID 838860810

  Prefixes

       XXXX:ed0:0:b:: / 64       options 0       metric 0

[Peter Paluch]

Hello Graham,

Basically, I want to find out if the default route has been sent into the Area1 as LSA-3.

On a quick topology I've concocted to test OSPFv3, I see the following output on my wannabe-RouterB:

R3#show ipv6 ospf database inter-area prefix ::/0

            OSPFv3 Router with ID (3.3.3.3) (Process ID 1)

                Inter Area Prefix Link States (Area 1)

  Routing Bit Set on this LSA

  LS age: 120

  LS Type: Inter Area Prefix Links

  Link State ID: 2

  Advertising Router: 2.2.2.2

  LS Seq Number: 80000001

  Checksum: 0x5DD6

  Length: 28

  Metric: 1

  Prefix Address: ::

  Prefix Length: 0, Options: None

Using the same command on your RouterB, do you see any LSA referring to the ::/0 being present?

Best regards,

Peter

[graham smart]

Annoyingly the routerb is a damn Juniper E120. So that command isnt available. I cant even find a similar one

Grr.

show ipv6 ospf database ?                    

  &>                 Display and redirect the output to a file, replacing

                     previous contents

  &>>                Display and redirect the output to a file, appending to

                     previous contents

  >                  Redirect the output to a file, replacing previous contents

  >>                 Redirect the output to a file, appending to previous

                     contents

  database-summary   Display summary of the OSPFv3 link state database

  external           Display V3 external link state

  grace              Display V3 grace link state

  inter-area-net     Display V3 inter-area network link state

  inter-area-router  Display V3 inter-area asbr link state

  intra-area-prefix  Display V3 intra area prefix link states

  link               Display V3 Link link states

  network            Display V3 Network link states

  router             Display V3 router link states

  vrf                Specify a VRF as the context for this command

  |                  Filter output using the CLI Filtering feature

lon029#show ipv6 ospf database inter

lon029#show ipv6 ospf database inter-area-n

lon029#show ipv6 ospf database inter-area-net ?

  &>       Display and redirect the output to a file, replacing previous

           contents

  &>>      Display and redirect the output to a file, appending to previous

           contents

  >        Redirect the output to a file, replacing previous contents

  >>       Redirect the output to a file, appending to previous contents

  A.B.C.D  Advertising router

  |        Filter output using the CLI Filtering feature

Done know if this helps?

Thanks

-G

[code]

lon029#show ipv6 ospf database inter-area-net xxx.125.95.30

      V3 Inter-Area-Net Link States (Area 0.0.0.1)

  LS age: 1431

  LS Type: Inter Area Net Links

  Link State ID: 0.0.0.0

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80006ebf

  Checksum: 0x2d14

  Length: 28

     Metric: 1

       :: / 0       options 0       metric 0

  LS age: 1431

  LS Type: Inter Area Net Links

  Link State ID: 0.0.0.1

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80001655

  Checksum: 0xff75

  Length: 44

     Metric: 1000

       2a00:ed0::9 / 128       options 0       metric 0

  LS age: 1431

  LS Type: Inter Area Net Links

  Link State ID: 0.0.0.19

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000163f

  Checksum: 0x224b

  Length: 44

     Metric: 0

       2a00:ed0::1 / 128       options 0       metric 0

  LS age: 1436

  LS Type: Inter Area Net Links

  Link State ID: 0.0.0.20

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80006ebf

  Checksum: 0x6118

  Length: 44

     Metric: 1000

       2a00:ed0:0:1::30 / 126       options 0       metric 0

  LS age: 1436

  LS Type: Inter Area Net Links

  Link State ID: 0.0.0.21

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80006ebf

  Checksum: 0x 9e0

  Length: 36

     Metric: 1000

       2a00:ed0:0:6:: / 64       options 0       metric 0

  LS age: 1436

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.59

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000151a

  Checksum: 0xc587

  Length: 44

     Metric: 1005

       2a00:ed0:0:1::2c / 126       options 0       metric 0

  LS age: 1436

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.60

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000151a

  Checksum: 0xea76

  Length: 44

     Metric: 5

       2a00:ed0::2 / 128       options 0       metric 0

  LS age: 1437

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.61

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80001513

  Checksum: 0xbeab

  Length: 44

     Metric: 5

       2a00:ed0:0:1:: / 126       options 0       metric 0

  LS age: 1437

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.143

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xbceb

  Length: 44

     Metric: 15

       2a00:ed0::10 / 128       options 0       metric 0

  LS age: 1437

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.144

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xfc57

  Length: 44

     Metric: 1115

       2a00:ed0:0:1::14 / 126       options 0       metric 0

  LS age: 1437

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.145

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xe369

  Length: 44

     Metric: 115

       2a00:ed0::5 / 128       options 0       metric 0

  LS age: 1438

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.146

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x9041

  Length: 44

     Metric: 215

       2a00:ed0:0:1::1c / 126       options 0       metric 0

  LS age: 1438

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.147

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x1eb6

  Length: 44

     Metric: 215

       2a00:ed0:0:1::18 / 126       options 0       metric 0

  LS age: 1438

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.148

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x1818

  Length: 44

     Metric: 1115

       2a00:ed0:0:1::34 / 126       options 0       metric 0

  LS age: 1438

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.149

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xde60

  Length: 44

     Metric: 115

       2a00:ed0:0:1::10 / 126       options 0       metric 0

  LS age: 1438

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.150

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xd0f8

  Length: 44

     Metric: 215

       2a00:ed0:0:1::20 / 126       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.151

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x1cc5

  Length: 44

     Metric: 215

       2a00:ed0::6 / 128       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.152

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xb211

  Length: 44

     Metric: 1215

       2a00:ed0:0:1::38 / 126       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.153

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xdc7d

  Length: 44

     Metric: 315

       2a00:ed0:0:1::28 / 126       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.154

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x6af2

  Length: 44

     Metric: 315

       2a00:ed0:0:1::24 / 126       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.155

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xeed7

  Length: 36

     Metric: 315

       2a00:ed0:1:: / 64       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.156

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xf6cd

  Length: 36

     Metric: 315

       2a00:ed0:1:1:: / 64       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.157

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xfec3

  Length: 36

     Metric: 315

       2a00:ed0:1:2:: / 64       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.158

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x45f2

  Length: 36

     Metric: 1215

       2a00:ed0:0:5:: / 64       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.159

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xe5f2

  Length: 44

     Metric: 215

       2a00:ed0::7 / 128       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.160

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x67cb

  Length: 36

     Metric: 1215

       2a00:ed0:0:8:: / 64       options 0       metric 0

  LS age: 1439

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.161

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0xebe9

  Length: 44

     Metric: 215

       2a00:ed0::8 / 128       options 0       metric 0

  LS age: 1440

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.162

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x59f0

  Length: 44

     Metric: 1115

       2a00:ed0::b / 128       options 0       metric 0

  LS age: 1440

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.164

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000116b

  Checksum: 0x797f

  Length: 36

     Metric: 1015

       2a00:ed0:0:7:: / 64       options 0       metric 0

  LS age: 1440

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.165

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000106c

  Checksum: 0x878e

  Length: 36

     Metric: 1215

       2a00:ed0:2000:: / 64       options 0       metric 0

  LS age: 1440

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.167

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80001036

  Checksum: 0xc711

  Length: 44

     Metric: 10

       2a00:ed0::3 / 128       options 0       metric 0

  LS age: 1440

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.168

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80001036

  Checksum: 0x448f

  Length: 44

     Metric: 10

       2a00:ed0:0:1::8 / 126       options 0       metric 0

  LS age: 1440

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.169

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80001036

  Checksum: 0xefe1

  Length: 44

     Metric: 15

       2a00:ed0:0:1::4 / 126       options 0       metric 0

  LS age: 1440

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.172

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x80000aa6

  Checksum: 0xd388

  Length: 44

     Metric: 15

       2a00:ed0:0:1::c / 126       options 0       metric 0

  LS age: 1440

  LS Type: Inter Area Net Links

  Link State ID: 0.0.3.186

  Advertising Router: xxx.125.95.30

  LS Seq Number: 0x8000070b

  Checksum: 0xbd11

  Length: 36

[/code]

[Peter Paluch]

Hi Graham,

Well, the LSA-3 containing the ::/0 seems definitely to be present there. Hmm, and what does the show ipv6 route or similar say? Is there really no default route present?

Best regards,

Peter

[graham smart]

Yep, Its reallllly odd. Its as if the router is just deciing to not bother putting it into its routing table.

Heres the entire routing table for that router:

lon029#sh ipv6 route

Protocol/Route type codes:

  I1- ISIS level 1, I2- ISIS level2,

  I- route type intra, IA- route type inter, E- route type external,

  i- metric type internal, e- metric type external,

  O- OSPF, E1- external type 1, E2- external type2,

  N1- NSSA external type1, N2- NSSA external type2

  L- MPLS label, V- VRF, *- via indirect next-hop

         Prefix/Length             Type     Dst/Met           Interface       

-------------------------------- --------- ---------- -------------------------

xx00:ed0::1/128                  O-IA      112/100    GigabitEthernet1/0/0    

xx00:ed0::2/128                  O-IA      112/105    GigabitEthernet1/0/0    

xx00:ed0::3/128                  O-IA      112/110    GigabitEthernet1/0/0    

xx00:ed0::5/128                  O-IA      112/215    GigabitEthernet1/0/0    

xx00:ed0::6/128                  O-IA      112/315    GigabitEthernet1/0/0    

xx00:ed0::7/128                  O-IA      112/315    GigabitEthernet1/0/0    

xx00:ed0::8/128                  O-IA      112/315    GigabitEthernet1/0/0    

xx00:ed0::9/128                  O-IA      112/1100   GigabitEthernet1/0/0    

xx00:ed0::b/128                  O-IA      112/1215   GigabitEthernet1/0/0    

xx00:ed0::e/128                  O-IA      112/210    GigabitEthernet1/0/0    

xx00:ed0::f/128                  Connect   0/0        loopback0               

xx00:ed0::10/128                 O-IA      112/115    GigabitEthernet1/0/0    

xx00:ed0::15/128                 O-IA      112/1215   GigabitEthernet1/0/0    

xx00:ed0::3a/128                 O-IA      112/110    GigabitEthernet1/0/0    

         Prefix/Length             Type     Dst/Met           Interface       

-------------------------------- --------- ---------- -------------------------

xx00:ed0::3b/128                 O-IA      112/116    GigabitEthernet1/0/0    

xx00:ed0::3c/128                 O-IA      112/115    GigabitEthernet1/0/0    

xx00:ed0:0:1::/126               O-IA      112/105    GigabitEthernet1/0/0    

xx00:ed0:0:1::4/126              O-IA      112/115    GigabitEthernet1/0/0    

xx00:ed0:0:1::8/126              O-IA      112/110    GigabitEthernet1/0/0    

xx00:ed0:0:1::c/126              O-IA      112/115    GigabitEthernet1/0/0    

xx00:ed0:0:1::10/126             O-IA      112/215    GigabitEthernet1/0/0    

xx00:ed0:0:1::14/126             O-IA      112/1215   GigabitEthernet1/0/0    

xx00:ed0:0:1::18/126             O-IA      112/315    GigabitEthernet1/0/0    

xx00:ed0:0:1::1c/126             O-IA      112/315    GigabitEthernet1/0/0    

xx00:ed0:0:1::20/126             O-IA      112/315    GigabitEthernet1/0/0    

xx00:ed0:0:1::24/126             O-IA      112/415    GigabitEthernet1/0/0    

xx00:ed0:0:1::28/126             O-IA      112/415    GigabitEthernet1/0/0    

xx00:ed0:0:1::2c/126             O-IA      112/1105   GigabitEthernet1/0/0    

xx00:ed0:0:1::30/126             O-IA      112/1100   GigabitEthernet1/0/0    

xx00:ed0:0:1::34/126             O-IA      112/1215   GigabitEthernet1/0/0    

xx00:ed0:0:1::38/126             O-IA      112/1315   GigabitEthernet1/0/0    

xx00:ed0:0:1::5c/126             O-IA      112/115    GigabitEthernet1/0/0    

xx00:ed0:0:1::60/126             O-IA      112/210    GigabitEthernet1/0/0    

xx00:ed0:0:1::64/126             O-IA      112/116    GigabitEthernet1/0/0    

xx00:ed0:0:1::78/126             O-IA      112/110    GigabitEthernet1/0/0    

xx00:ed0:0:1::80/126             O-IA      112/120    GigabitEthernet1/0/0    

xx00:ed0:0:1::84/126             O-IA      112/1215   GigabitEthernet1/0/0    

xx00:ed0:0:5::/64                O-IA      112/1315   GigabitEthernet1/0/0    

xx00:ed0:0:6::/64                O-IA      112/1100   GigabitEthernet1/0/0    

xx00:ed0:0:7::/64                O-IA      112/1115   GigabitEthernet1/0/0    

xx00:ed0:0:8::/64                O-IA      112/1315   GigabitEthernet1/0/0    

xx00:ed0:0:a::/64                Connect   0/0        GigabitEthernet0/0/1    

xx00:ed0:0:b::/64                Connect   0/0        GigabitEthernet1/0/0    

xx00:ed0:0:c::/64                O-IA      112/210    GigabitEthernet1/0/0    

xx00:ed0:0:d::/64                O-IA      112/215    GigabitEthernet1/0/0    

xx00:ed0:1::/64                  O-IA      112/415    GigabitEthernet1/0/0    

xx00:ed0:1:1::/64                O-IA      112/415    GigabitEthernet1/0/0    

xx00:ed0:1:2::/64                O-IA      112/415    GigabitEthernet1/0/0    

xx00:ed0:2000::/64               O-IA      112/1315   GigabitEthernet1/0/0    

lon029# sh ipv6 roue

lon029# sh ipv6 rou

lon029# sh ipv6 route ::0

% Route lookup failed (no route table entry)

lon029# sh ipv6 route ::

% Route lookup failed (no route table entry)

lon029# sh ipv6 route ::/0

Protocol/Route type codes:

  I1- ISIS level 1, I2- ISIS level2,

  I- route type intra, IA- route type inter, E- route type external,

  i- metric type internal, e- metric type external,

  O- OSPF, E1- external type 1, E2- external type2,

  N1- NSSA external type1, N2- NSSA external type2

  L- MPLS label, V- VRF, *- via indirect next-hop

         Prefix/Length             Type     Dst/Met           Interface       

-------------------------------- --------- ---------- -------------------------

[Peter Paluch · Accepted solution]

Graham,

Well, it may be a glitch in Juniper's OSPF implementation - is it possible for you to restart the OSPF process on the RouterB, or perhaps restart the entire router?

Nevertheless, we may be dealing with some JUNOS specific behavior. What is the exact version? Although I am not acquainted with Juniper devices, this may be a good reason to start I may try to look up specifics about default routes in your JUNOS version.

Best regards,

Peter

[graham smart]

Yeah im thinking the same now.

Ive found that for some reason the route isnt advertising its ipv6 loopback address to the cisco P's either.

Yet we have other E120's that work fine ( Exactly same config )

Ive raised a tac case with juniper. I did think that maybe this router was playing up and I think this confirms it.

Always good when its not a cisco issue

Thanks again for your help. Its certainly good to know now that the router IS! getting the default ::/0 but just ignoring it.

Will see if I can restart the ospfv3 service. May just reload the whole damn thing lol.

Thanks again for your swift helpful support on this matter

Have a great day.

[Peter Paluch]

Hello Graham,

You are most welcome! Please keep me informed if anything new comes from Juniper that will actually help you solve this. I am interested in learning what was the root cause of this issue.

Once again, sorry for the typos in my recommended commands and for not being clear about my intention from the beginning. Anyway, it has been a pleasure!

Take care.

Best regards,

Peter