Re: MPLS across serial link

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
>> >
>> >
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Received on Tue Aug 17 2010 - 15:44:32 ART