Re: MPLS across serial link

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 - 15:49:22 ART