Re: Cannot form LDP peer

Hi Bob,

thanks for your reply.
just got the idea to enable also the LDP router-id into routing protocol,
and that is work now.
thanks for your all guys.

Thanks,
Jerry

2009/6/22 Bob Sinclair <bob_at_bobsinclair.net>

> Hi Jerry,
>
> LDP sets up a TCP session between peers. The endpoints of this session are
> the ldp router IDs. Unlike most RIDs, the LDP RID must be a reachable IP
> address.
>
> HTH,
>
> -Bob
>
>
>
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> > Jerry Chan
> > Sent: Monday, June 22, 2009 6:45 PM
> > To: Ernest Wambari
> > Cc: Cisco certification
> > Subject: Re: Cannot form LDP peer
> >
> > Hi Ernest,
> >
> > i will try it soon, but what is the reason to force it to modify the
> > router-id? is that not only a idenidifier?
> >
> > THanks,
> > Jerry
> >
> > 2009/6/22 Ernest Wambari <ewambari_at_gmail.com>
> >
> > > 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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> > >>>>
> > >>>>
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Received on Mon Jun 22 2009 - 18:10:25 ART