Re: Missing labels in T-LDP

From: Iwan Hoogendoorn <iwan_at_ipexpert.com>
Date: Mon, 12 Oct 2009 11:30:41 +0200

Hi Marcel,

Can you please add the folowing commands to your PE's:

mpls ldp router-id loopback 0
mpls label protocol ldp

Please tell me what happens...

-- 
Regards,
Iwan Hoogendoorn
CCIE #13084 (R&S / Security / SP)
Sr. Support Engineer  IPexpert, Inc.
URL: http://www.IPexpert.com
On Sun, Oct 11, 2009 at 1:14 PM, Marcel Lammerse <m.lammerse_at_mac.com> wrote:
> Configs and diagram attached. Unfortunately I can't draw ascii diagrams..
>
>
>
>
>
>
> On 11/10/2009, at 20:48 , Rick Mur wrote:
>
>> Indeed, please post configs and a small overview of your setup.
>> Have you tried clearing the LDP neighbor sessions, doing a 'clear ip route
>> *' or even reloading all the involved routers?
>> LDP sometimes has this strange thing of not working 100% in IOS.
>>
>>
>>
>> --
>>
>> Regards,
>>
>> Rick Mur
>> CCIE2 #21946 (R&S / Service Provider)
>> Sr. Support Engineer  IPexpert, Inc.
>> URL: http://www.IPexpert.com
>>
>> On 11 okt 2009, at 11:34, Iwan Hoogendoorn wrote:
>>
>>> Hi,
>>>
>>> I would also like to see the config and the topo.
>>>
>>> Thanks,
>>>
>>>
>>>
>>> --
>>> Regards,
>>>
>>> Iwan Hoogendoorn
>>> CCIE #13084 (R&S / Security / SP)
>>> Sr. Support Engineer   IPexpert, Inc.
>>> URL: http://www.IPexpert.com
>>>
>>> On Thu, Oct 8, 2009 at 2:13 AM, Marcel Lammerse <m.lammerse_at_mac.com>
>>> wrote:
>>>>
>>>> Experts,
>>>>
>>>> here I have a load-balanced path between directly connected ldp speakers
>>>> :
>>>>
>>>> PE4#sh mpls forwarding-table 192.168.2.0
>>>> Local  Outgoing      Prefix            Bytes Label   Outgoing   Next Hop
>>>> Label  Label or VC   or Tunnel Id      Switched      interface
>>>> 22     25            192.168.2.0/24    0             Fa1/0
>>>>  172.16.14.1
>>>>    23            192.168.2.0/24    0             Fa3/0      172.16.34.3
>>>> PE4#
>>>>
>>>> PE4#sh mpls ldp bindings 192.168.2.0 24 detail
>>>> lib entry: 192.168.2.0/24, rev 22, chkpt: none
>>>>     local binding:  label: 22 (owner LDP)
>>>>       Advertised to:
>>>>       1.1.1.1:0              3.3.3.3:0
>>>>     remote binding: lsr: 1.1.1.1:0, label: 25
>>>>     remote binding: lsr: 3.3.3.3:0, label: 23
>>>>     route information: state: none, table: default,
>>>>       next-hop: 172.16.14.1, remote label: 25
>>>>     route information: state: none, table: default,
>>>>       next-hop: 172.16.34.3, remote label: 23
>>>>
>>>> If I change the ldp sessions to t-ldp, and keep everything else the
>>>> same, the labels seem to disappear and traffic appears to go out untagged :
>>>>
>>>> PE4#sh mpls forwarding-table 192.168.2.0
>>>> Local  Outgoing      Prefix            Bytes Label   Outgoing   Next Hop
>>>> Label  Label or VC   or Tunnel Id      Switched      interface
>>>> 22     No Label      192.168.2.0/24    0             Fa1/0
>>>>  172.16.14.1
>>>>    No Label      192.168.2.0/24    0             Fa3/0      172.16.34.3
>>>> PE4#
>>>>
>>>> PE4#sh mpls ldp bindings 192.168.2.0 24 detail
>>>> lib entry: 192.168.2.0/24, rev 22, chkpt: none
>>>>     local binding:  label: 22 (owner LDP)
>>>>       Advertised to:
>>>>       3.3.3.3:0              1.1.1.1:0
>>>>     remote binding: lsr: 3.3.3.3:0, label: 23
>>>>     remote binding: lsr: 1.1.1.1:0, label: 25
>>>>     route information: state: none, table: default,
>>>>       next-hop: 172.16.14.1, remote label: <----- no label
>>>>     route information: state: none, table: default,
>>>>       next-hop: 172.16.34.3, remote label: <----- no label
>>>> PE4#
>>>>
>>>> I'm a bit confused by this. I would have expected the traffic to
>>>> continue to be labeled and the labels to remain the same.
>>>>
>>>> Can anyone shed some light on why this happens?
>>>>
>>>> Thanks,
>>>> Marcel
>>>>
>>>>
>>>> Blogs and organic groups at http://www.ccie.net
>>>>
>>>> _______________________________________________________________________
>>>> Subscription information may be found at:
>>>> http://www.groupstudy.com/list/CCIELab.html
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Regards,
>>>
>>> Iwan Hoogendoorn
>>> CCIE #13084 (R&S / Security / SP)
>>> Sr. Support Engineer   IPexpert, Inc.
>>> URL: http://www.IPexpert.com
>>>
>>>
>>> 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
Received on Mon Oct 12 2009 - 11:30:41 ART

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