Re: Cannot form LDP peer

Hi Jerry,

Try hard-coding the mpls router id's on both ends using the:"mpls ldp
router-id <int> force".

Would be a good idea to setup loopback interfaces on R1 and R3 for this.

Be sure to use the force switch or disable and enable ldp on each serial
interface after the change.

HTH,

W.

On Mon, Jun 22, 2009 at 7:30 PM, Jerry Chan <temjin1997_at_gmail.com> wrote:

> Hi Ernest,
>
> thanks for your reply,
> i cannot see anything on R3 when i type "sh mpls ldp nei"
> and i only can see the peer on R1 with R2.
>
> Thanks,
> Jerry Chan
>
> 2009/6/22 Ernest Wambari <ewambari_at_gmail.com>
>
> Hi Jerry,
>>
>> Check your mpls ldp router-ids.
>>
>> Use the "sh mpls ldp nei" to see if R1 and R3 are peering via the expected
>> interfaces.
>>
>> As Joe mentioned,looks like they are not.
>>
>> Regards,
>>
>> W.
>>
>> On Mon, Jun 22, 2009 at 6:42 PM, Jerry Chan <temjin1997_at_gmail.com> wrote:
>>
>>> Hi all expert,
>>>
>>> *I am now studying the MPLS, start to do the LDP workbook. (using GNS3)
>>> however, it cannot form peer with a simple connection between R1--R3
>>> using a
>>> serial link or frame-relay.*
>>>
>>> R1. config
>>> =======
>>> ip cef
>>> mpls label protocol ldp
>>> !
>>> interface Serial1/3
>>> ip address 150.1.13.1 255.255.255.0
>>> mpls ip
>>> !
>>>
>>> R3. config
>>> =======
>>> ip cef
>>> mpls label protocol ldp
>>> !
>>> interface Serial1/3
>>> ip address 150.1.13.3 255.255.255.0
>>> clock rate 64000
>>> mpls ip
>>> !
>>>
>>> *it can ping , can form ospf peer, but cannot form ldp peer. Am I do the
>>> wrong things?
>>> when i type debug mpls ldp tran even on both R1 and R3, it give me like
>>> these.*
>>>
>>> Rack10R1#
>>> *Jun 22 16:22:45.203: ldp: Rcvd ldp hello; Serial1/3, from 150.1.13.3 (
>>> 150.1.13.3:0), intf_id 0, opt 0xC
>>> *Jun 22 16:22:45.215: ldp: ldp Hello from 150.1.13.3 (150.1.13.3:0) to
>>> 224.0.0.2, opt 0xC
>>> *Jun 22 16:22:45.215: ldp: local idb = Serial1/3, holdtime = 15000, peer
>>> 150.1.13.3 holdtime = 15000
>>> *Jun 22 16:22:45.219: ldp: Link intvl min cnt = 2, intvl = 5000, idb =
>>> Serial1/3
>>> *Jun 22 16:22:45.831: ldp: Send ldp hello; Serial1/3, src/dst
>>> 150.1.13.1/224.0.0.2, inst_id 0
>>>
>>> Rack10R3#
>>> *Jun 22 16:19:38.887: ldp: Ignore rcvd dir hello to 150.1.13.3 from
>>> 150.1.12.1, Serial1/3; no dhcb
>>> *Jun 22 16:19:39.519: ldp: Rcvd ldp hello; Serial1/3, from 150.1.13.1 (
>>> 150.1.12.1:0), intf_id 0, opt 0xC
>>> *Jun 22 16:19:39.523: ldp: Send ldp hello; Serial1/3, src/dst
>>> 150.1.13.3/224.0.0.2, inst_id 0
>>> *Jun 22 16:19:39.527: ldp: ldp Hello from 150.1.13.1 (150.1.12.1:0) to
>>> 224.0.0.2, opt 0xC
>>> *Jun 22 16:19:39.531: ldp: local idb = Serial1/3, holdtime = 15000, peer
>>> 150.1.13.1 holdtime = 15000
>>> *Jun 22 16:19:39.531: ldp: Link intvl min cnt = 2, intvl = 5000, idb =
>>> Serial1/3
>>> *Jun 22 16:19:39.535: ldp: Opening ldp conn; adj 0x6771C238, 150.1.13.3
>>> <->
>>> 150.1.12.1; with normal priority
>>>
>>> *please kinldy to give me some hits.
>>>
>>> Thanks
>>> *Jerry
>>>
>>>
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Received on Mon Jun 22 2009 - 19:41:48 ART