Re: MPLS across serial link

You could use also this command under the interface:

  mpls ldp discovery transport-address interface

It will make the router to use the interface ip address to build up the TCP
session

On Tue, Aug 17, 2010 at 12:19 PM, srinivas pv <vsrinivas.paturi_at_gmail.com>wrote:

> Hi,
>
> You can specify router-id as ip addresses of serial interface, by
> configuring 'mpls ldp router-id <serial int>'.
>
> But it is better to advertise loopbacks in IGP.
>
> Thanks,
> Srinivas
>
>
> On Tue, Aug 17, 2010 at 3:44 PM, GAURAV MADAN <gauravmadan1177_at_gmail.com>wrote:
>
>> Got the hint from Jomi's mail ..
>> Loopback need to be reachable which wasnt in my case .
>>
>> If I dont want LDP across loopback .. then ?
>> I mean my IP were reachable but loopbacks were not .. hence i was
>> seeing this issue .
>>
>> Thnx
>> Gaurav Madan
>>
>> On Tue, Aug 17, 2010 at 3:31 PM, garry baker <baker.garry_at_gmail.com>
>> wrote:
>> > used your config on my two routers worked like a charm?
>> >
>> > R3#sh debugging
>> > MPLS ldp:
>> > LDP received messages, excluding periodic Keep Alives debugging is on
>> > LDP sent PDUs, excluding periodic Keep Alives debugging is on
>> > R3(config)#int s0/0
>> > R3(config-if)#no shut
>> > R3(config-if)#end
>> > R3#
>> > *Mar 1 00:03:05.519: %SYS-5-CONFIG_I: Configured from console by
>> console
>> > *Mar 1 00:03:06.607: %LINK-3-UPDOWN: Interface Serial0/0, changed state
>> to
>> > up
>> > *Mar 1 00:03:07.299: ldp: Sent init msg to 150.1.13.1 (pp 0x0)
>> > *Mar 1 00:03:07.523: ldp: Rcvd init msg from 150.1.13.1 (pp 0x0)
>> > *Mar 1 00:03:07.527: ldp: Rcvd keepalive msg from 150.1.13.1:0 (pp
>> 0x0)
>> > *Mar 1 00:03:07.531: %LDP-5-NBRCHG: LDP Neighbor 150.1.13.1:0 (1) is
>> UP
>> > *Mar 1 00:03:07.539: ldp: Sent address msg to 150.1.13.1:0 (pp
>> 0x67262638)
>> > *Mar 1 00:03:07.539: ldp: Sent label mapping msg to 150.1.13.1:0 (pp
>> > 0x67262638)
>> > *Mar 1 00:03:07.607: %LINEPROTO-5-UPDOWN: Line protocol on Interface
>> > Serial0/0, changed state to up
>> > *Mar 1 00:03:07.731: ldp: Rcvd address msg from 150.1.13.1:0 (pp
>> > 0x67262638)
>> > *Mar 1 00:03:07.735: ldp: Rcvd label mapping msg from 150.1.13.1:0 (pp
>> > 0x67262638)
>> > R3#sh ver
>> > Cisco IOS Software, 3700 Software (C3725-ADVENTERPRISEK9-M), Version
>> > 12.4(15)T12, RELEASE SOFTWARE (fc3)
>> >
>> > R1#
>> > *Mar 1 00:03:07.903: %LDP-5-NBRCHG: LDP Neighbor 150.1.13.3:0 (1) is
>> UP
>> > R1#sh mpls ldp ne
>> > R1#sh mpls ldp neighbor
>> > Peer LDP Ident: 150.1.13.3:0; Local LDP Ident 150.1.13.1:0
>> > TCP connection: 150.1.13.3.35083 - 150.1.13.1.646
>> > State: Oper; Msgs sent/rcvd: 6/5; Downstream
>> > Up time: 00:01:40
>> > LDP discovery sources:
>> > Serial0/0.13, Src IP addr: 150.1.13.3
>> > Addresses bound to peer LDP Ident:
>> > 150.1.13.3
>> > R3#sh mpls ldp neighbor
>> > Peer LDP Ident: 150.1.13.1:0; Local LDP Ident 150.1.13.3:0
>> > TCP connection: 150.1.13.1.646 - 150.1.13.3.35083
>> > State: Oper; Msgs sent/rcvd: 6/6; Downstream
>> > Up time: 00:01:56
>> > LDP discovery sources:
>> > Serial0/0.13, Src IP addr: 150.1.13.1
>> > Addresses bound to peer LDP Ident:
>> > 150.1.13.1
>> >
>> > --
>> > Garry L. Baker
>> >
>> > "There is no 'patch' for stupidity." - www.sqlsecurity.com
>> >
>> >
>> > On Tue, Aug 17, 2010 at 12:41 PM, Jomi <doctorfleming_at_gmail.com> wrote:
>> >>
>> >> In order to stablish the LDP session, routers need to reach the IP they
>> >> use
>> >> in LDP.
>> >> Do you have any Loopbacks on those routers?? Are those loobpack
>> reachables
>> >> between the routers?? Check which IP is using each router to stablish
>> de
>> >> session, and check if it's reachable.
>> >>
>> >>
>> >>
>> >> On Tue, Aug 17, 2010 at 11:33 AM, GAURAV MADAN
>> >> <gauravmadan1177_at_gmail.com>wrote:
>> >>
>> >> > Hi Frnds
>> >> >
>> >> > I don't have a FR switch in between .. Just have a back to back stuff
>> >> > ( connectivity fine ; disabled keepalive ) . Following are configs :
>> >> >
>> >> > ================= R1 =================
>> >> > R1#sh run int s0/0/0
>> >> > Building configuration...
>> >> >
>> >> > Current configuration : 104 bytes
>> >> > !
>> >> > interface Serial0/0/0
>> >> > no ip address
>> >> > encapsulation frame-relay
>> >> > no keepalive
>> >> > clock rate 125000
>> >> > end
>> >> > !
>> >> >
>> >> > R1#sh run int s0/0/0.13
>> >> > Building configuration...
>> >> >
>> >> > Current configuration : 151 bytes
>> >> > !
>> >> > interface Serial0/0/0.13 point-to-point
>> >> > ip address 150.1.13.1 255.255.255.0
>> >> > snmp trap link-status
>> >> > mpls ip
>> >> > frame-relay interface-dlci 103
>> >> > end
>> >> >
>> >> > ================ R3 ====================
>> >> > R3(config)#do sh run int s0/0/0
>> >> > Building configuration...
>> >> >
>> >> > Current configuration : 113 bytes
>> >> > !
>> >> > interface Serial0/0/0
>> >> > description " to FR cloud"
>> >> > no ip address
>> >> > encapsulation frame-relay
>> >> > no keepalive
>> >> > end
>> >> >
>> >> > R3(config)#do sh run int s0/0/0.13
>> >> > Building configuration...
>> >> >
>> >> > Current configuration : 151 bytes
>> >> > !
>> >> > interface Serial0/0/0.13 point-to-point
>> >> > ip address 150.1.13.3 255.255.255.0
>> >> > snmp trap link-status
>> >> > mpls ip
>> >> > frame-relay interface-dlci 103
>> >> > end
>> >> > ===========================================
>> >> >
>> >> > R3(config)#do p 150.1.13.1
>> >> >
>> >> > Type escape sequence to abort.
>> >> > Sending 5, 100-byte ICMP Echos to 150.1.13.1, timeout is 2 seconds:
>> >> > !!!!!
>> >> > Success rate is 100 percent (5/5), round-trip min/avg/max = 12/14/16
>> ms
>> >> > R3(config)#
>> >> >
>> >> >
>> >> >
>> >> > But problem is that I am not able to establish the LDP adj . I tried
>> >> > HDLC encap .. with no luck ..
>> >> > Something special which I am missing ?
>> >> >
>> >> > Thnx
>> >> > Gaurav Madan
>> >> >
>> >> >
>> >> > Blogs and organic groups at http://www.ccie.net
>> >> >
>> >> >
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Received on Tue Aug 17 2010 - 12:34:49 ART