Re: Link state protocol

If the link is shut down you will not see it in the database...below you see
that I shutdown the serial link on R2 and as a result 2 of the 3 LSAs went
away (only the loopback remains)

R2(config)#int s0/1/0
R2(config-if)#shutdown

R2(config-if)#do sh ip ospf data router

            OSPF Router with ID (2.2.2.2) (Process ID 1)

                Router Link States (Area 0)

  LS age: 10
  Options: (No TOS-capability, DC)
  LS Type: Router Links
  Link State ID: 2.2.2.2
  Advertising Router: 2.2.2.2
  LS Seq Number: 80000064
  Checksum: 0xDFD6
  Length: 36
  Number of Links: 1

    Link connected to: a Stub Network
     (Link ID) Network/subnet number: 2.2.2.2
     (Link Data) Network Mask: 255.255.255.255
      Number of TOS metrics: 0
       TOS 0 Metrics: 1

On Thu, Sep 17, 2009 at 5:32 AM, jack daniels <jckdaniels12_at_gmail.com>wrote:

> Hi,
>
> where is the state of the LINK ( up/down) in the output.
>
> Regards
>
> On Thu, Sep 17, 2009 at 3:00 PM, Joe Astorino <jastorino_at_ipexpert.com>wrote:
>
>> Check out the LSDB. Here is an example of a type-1 LSA stored in the
>> link-state database on a router
>>
>> R2#sh ip ospf data router
>>
>> OSPF Router with ID (2.2.2.2) (Process ID 1)
>>
>> Router Link States (Area 0)
>>
>> LS age: 498
>> Options: (No TOS-capability, DC)
>> LS Type: Router Links
>> Link State ID: 2.2.2.2
>> Advertising Router: 2.2.2.2
>> LS Seq Number: 80000063
>> Checksum: 0x1569
>> Length: 60
>> Number of Links: 3
>>
>> Link connected to: a Stub Network
>> (Link ID) Network/subnet number: 2.2.2.2
>> (Link Data) Network Mask: 255.255.255.255
>> Number of TOS metrics: 0
>> TOS 0 Metrics: 1
>>
>> Link connected to: another Router (point-to-point)
>> (Link ID) Neighboring Router ID: 6.6.6.6
>> (Link Data) Router Interface address: 150.100.100.2
>> Number of TOS metrics: 0
>> TOS 0 Metrics: 64
>>
>> Link connected to: a Stub Network
>> (Link ID) Network/subnet number: 150.100.100.2
>> (Link Data) Network Mask: 255.255.255.255
>> Number of TOS metrics: 0
>> TOS 0 Metrics: 0
>>
>>
>>
>> On Thu, Sep 17, 2009 at 5:15 AM, jack daniels <jckdaniels12_at_gmail.com>wrote:
>>
>>> Hi,
>>>
>>> Thanks , but where can I see the output of Links State ( up/down ) in
>>> OSPF
>>> database or routing table .
>>>
>>> Regards
>>>
>>>
>>>
>>> On Thu, Sep 17, 2009 at 1:48 PM, Abraham, Tharak <
>>> tharakabraham_at_gmail.com>wrote:
>>>
>>> > Flooding is the only method by which all the neighbors will have the
>>> same
>>> > database.
>>> >
>>> > One LSA is sent per each routers link with the details like
>>> >
>>> > 1. identifying the link --> network
>>> > 2. state of the link ---> up/down
>>> > 3. metric cost --> interface cost to the link
>>> > 4. any other links attached to that link --> neighbors on that link
>>> >
>>> >
>>> >
>>> > Best Regards,
>>> > Tharak Abraham Luke
>>> > Sent from Netherlands
>>> >
>>> > On Thu, Sep 17, 2009 at 9:25 AM, jack daniels <jckdaniels12_at_gmail.com
>>> >wrote:
>>> >
>>> >> Hi All,
>>> >>
>>> >> When we say Link state protocols flood link information to build to
>>> >> complete
>>> >> topology. >>>>
>>> >> Please help me in understanding what does it mens flood link
>>> >> information >>>>> as in OSPF or ISIS we see next hop cost .....but
>>> where
>>> >> is
>>> >> link states . Does link state mean Link State ( physicall state
>>> up/down)
>>> >>
>>> >> Regards
>>> >>
>>> >>
>>> >> Blogs and organic groups at http://www.ccie.net
>>> >>
>>> >>
>>> _______________________________________________________________________
>>> >> Subscription information may be found at:
>>> >> http://www.groupstudy.com/list/CCIELab.html
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>> --
>> Regards,
>>
>> Joe Astorino - CCIE #24347 R&S
>> Technical Instructor - IPexpert, Inc.
>> Cell: +1.586.212.6107
>> Fax: +1.810.454.0130
>> Mailto: jastorino_at_ipexpert.com
>>
>
>

-- 
Regards,
Joe Astorino - CCIE #24347 R&S
Technical Instructor - IPexpert, Inc.
Cell: +1.586.212.6107
Fax: +1.810.454.0130
Mailto:  jastorino_at_ipexpert.com
Blogs and organic groups at http://www.ccie.net