Hi,
Just go to each one of your LSR's and verify your LDP neighbors are there.
"show mpls ldp neighbor"
- Verify MPLS/LDP neighbors
Other troubleshooting commands that are helpful:
"show mpls ldp discovery"
- Here you want to see xmit/recv
"show mpls forwarding-table"
- Verify labels are bound to FEC's
2(config-router)#do sh mpls ldp discovery
Local LDP Identifier:
2.2.2.2:0
Discovery Sources:
Interfaces:
FastEthernet0/0.23 (ldp): xmit/recv
LDP Id: 3.3.3.3:0
FastEthernet0/0.24 (ldp): xmit/recv
LDP Id: 4.4.4.4:0
FastEthernet1/0 (ldp): xmit
R2(config-router)#do sh mpls ldp ne
Peer LDP Ident: 3.3.3.3:0; Local LDP Ident 2.2.2.2:0
TCP connection: 3.3.3.3.56592 - 2.2.2.2.646
State: Oper; Msgs sent/rcvd: 23/23; Downstream
Up time: 00:03:46
LDP discovery sources:
FastEthernet0/0.23, Src IP addr: 20.2.3.3
Addresses bound to peer LDP Ident:
20.2.3.3 20.3.4.3 20.3.6.3 3.3.3.3
Peer LDP Ident: 4.4.4.4:0; Local LDP Ident 2.2.2.2:0
TCP connection: 4.4.4.4.24668 - 2.2.2.2.646
State: Oper; Msgs sent/rcvd: 22/22; Downstream
Up time: 00:03:26
LDP discovery sources:
FastEthernet0/0.24, Src IP addr: 20.2.4.4
Addresses bound to peer LDP Ident:
20.2.4.4 20.3.4.4 20.4.5.4 20.4.6.4
4.4.4.4
R2(config-router)#do sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
16 Pop Label 3.3.3.3/32 0 Fa0/0.23 20.2.3.3
17 Pop Label 4.4.4.4/32 0 Fa0/0.24 20.2.4.4
18 18 5.5.5.5/32 0 Fa0/0.24 20.2.4.4
19 19 6.6.6.6/32 0 Fa0/0.23 20.2.3.3
19 6.6.6.6/32 0 Fa0/0.24 20.2.4.4
20 21 19.19.19.19/32 0 Fa0/0.23 20.2.3.3
21 19.19.19.19/32 0 Fa0/0.24 20.2.4.4
21 Pop Label 20.3.4.0/24 0 Fa0/0.23 20.2.3.3
Pop Label 20.3.4.0/24 0 Fa0/0.24 20.2.4.4
22 Pop Label 20.3.6.0/24 0 Fa0/0.23 20.2.3.3
23 Pop Label 20.4.5.0/24 0 Fa0/0.24 20.2.4.4
24 Pop Label 20.4.6.0/24 0 Fa0/0.24 20.2.4.4
25 25 20.5.6.0/24 0 Fa0/0.23 20.2.3.3
24 20.5.6.0/24 0 Fa0/0.24 20.2.4.4
26 25 20.5.19.0/24 0 Fa0/0.24 20.2.4.4
27 27 20.6.19.0/24 0 Fa0/0.23 20.2.3.3
26 20.6.19.0/24 0 Fa0/0.24 20.2.4.4
On Fri, Feb 1, 2013 at 4:29 PM, Bodnar, Edward <[email protected]>wrote:
> I don’t think I understand how to trouble shoot MPLS still. Anybody
> have any good links on troubleshooting end to end MPLS. I am just not
> getting it. I am not sure where this is broken. ****
>
> ** **
>
> *From:* Steve Di Bias [mailto:[email protected]]
> *Sent:* Friday, February 01, 2013 7:13 PM
> *To:* Bob McCouch
> *Cc:* Bodnar, Edward; [email protected]
>
> *Subject:* Re: [OSL | CCIE_RS] BGP PE - CE configuration****
>
> ** **
>
> I agree with Bob, make sure your LSP is good end-to-end. ****
>
> ** **
>
> To simplify this I usually run OSPF or IS-IS in the core and turn on "ldp
> autoconfig" under the routing process for the LSR"s. This will enable LDP
> on all your interfaces automagically so you don't have to do it manually.
> Of course you do what your lab tells you but if you are just playing around
> this saves lot's of time :)****
>
> ** **
>
> router isis****
>
> mpls ldp autoconfig****
>
> ** **
>
> or ****
>
> ** **
>
> router ospf 1****
>
> mpls ldp autoconfig****
>
> ** **
>
> If you have a topology and configs I would be more than happy to lab this
> up.****
>
> ** **
>
> Let me know...****
>
> ** **
>
> ** **
>
> ** **
>
> On Fri, Feb 1, 2013 at 3:37 PM, Bob McCouch <[email protected]> wrote:****
>
> Usually if you have your routes but no forwarding, it's an MPLS issue,
> not MP-BGP.
>
> Check 'sh MPLS forwarding' and 'sh MPLS ldp ne', etc. Verify the LSP.
>
> Bob
> --
> Sent from my iPhone, please excuse any typos.****
>
>
> On Feb 1, 2013, at 6:20 PM, "Bodnar, Edward" <[email protected]>
> wrote:
>
> > I can never seem to get this to work. I can See routes end to end but I
> am missing something when I use BGP as the PE - CE protocol. I thought BGP
> was supposed to be the easy one J
> >
> >
> >
> >
> >
> > I have full connectivity. And I can see routes Just can't ping.
> >
> >
> >
> > RT4:
> >
> > router bgp 1
> >
> > no bgp default ipv4-unicast
> >
> > bgp log-neighbor-changes
> >
> > neighbor 1.1.1.1 remote-as 1
> >
> > neighbor 1.1.1.1 update-source Loopback0
> >
> > neighbor 10.10.45.5 remote-as 5
> >
> > !
> >
> > address-family ipv4
> >
> > neighbor 1.1.1.1 activate
> >
> > neighbor 10.10.45.5 activate
> >
> > no auto-summary
> >
> > no synchronization
> >
> > exit-address-family
> >
> > !
> >
> > address-family vpnv4
> >
> > neighbor 1.1.1.1 activate
> >
> > neighbor 1.1.1.1 send-community both
> >
> > exit-address-family
> >
> > !
> >
> > address-family ipv4 vrf B
> >
> > neighbor 10.10.45.5 remote-as 5
> >
> > neighbor 10.10.45.5 activate
> >
> > no synchronization
> >
> > exit-address-family
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > R5(config-router)#do sh run | s bgp
> >
> > router bgp 5
> >
> > no synchronization
> >
> > bgp log-neighbor-changes
> >
> > network 55.55.55.55 mask 255.255.255.255
> >
> > neighbor 10.10.45.4 remote-as 1
> >
> > no auto-summary
> >
> >
> >
> >
> >
> > _______________________________________________
> > For more information regarding industry leading CCIE Lab training,
> please visit www.ipexpert.com
> >
> > Are you a CCNP or CCIE and looking for a job? Check out
> www.PlatinumPlacement.com
> >
> > http://onlinestudylist.com/mailman/listinfo/ccie_rs
> _______________________________________________
> For more information regarding industry leading CCIE Lab training, please
> visit www.ipexpert.com
>
> Are you a CCNP or CCIE and looking for a job? Check out
> www.PlatinumPlacement.com
>
> http://onlinestudylist.com/mailman/listinfo/ccie_rs****
>
>
>
> ****
>
> ** **
>
> -- ****
>
> Thank you,****
>
> ** **
>
> Steve Di Bias****
>
> CCIE #32840****
>
--
Thank you,
Steve Di Bias
CCIE #32840
_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit
www.ipexpert.com
Are you a CCNP or CCIE and looking for a job? Check out
www.PlatinumPlacement.com
http://onlinestudylist.com/mailman/listinfo/ccie_rs
