07-03-2025 02:56 AM - edited 07-03-2025 02:57 AM
Working on the following topology.
MPLS TE Tunnel on PE1 is successfuly configured.
but I cannot reach CustomerB from PE1. The control plane information seems to be ok but I am not sure if the data plane is broken. Any help is appreciated.
Solved! Go to Solution.
07-03-2025 02:26 PM
Hi @zeeshanbasit25789 ,
I see what the issue is. You are advertising 155.1.19.0/25 from CustomerB, which is more specific than the directly connected route used on PE2 (155.1.19.0/24).
Please remove this advertisement on CustomerB and the issue should be solved.
07-03-2025 06:36 AM
Hi @zeeshanbasit25789 ,
Connectivity looks good indeed from PE1 towards CustomerB. Can you check the connectivity from PE2 to CustomerA.
07-03-2025 11:16 AM
no reachability from PE2 to CustomerA either
07-03-2025 11:35 AM
Hi @zeeshanbasit25789 ,
I should have been more specific. Can you provide the "show ip cef vrf" output from PE2 for the prefix for CustomerA?
07-03-2025 11:46 AM
Hi @Harold Ritter ,
Here is the output, I also noticed that it says drop traffic in the mpls forwarding table on PE2 towards CustomerB loopback.
07-03-2025 12:07 PM
Hi @zeeshanbasit25789 ,
Could you please provide the configuration for PE1 and PE2?
07-03-2025 12:24 PM
Attached files are the config for both routers.
07-03-2025 01:10 PM - edited 07-03-2025 01:23 PM
Hi @zeeshanbasit25789 ,
It looks like there are stale entries in the LFIB. Do the following to reset the LFIB on PE2:
wr mem
config t
no router bgp 65000
end
config mem
This will restart the BGP process and should get rid of the stale entries.
Please provide a "show mpls for" from PE2 after performing the above procedure.
07-03-2025 01:25 PM
07-03-2025 09:05 AM
debug mpls traffic-eng path <<- share output of this debug
MHM
07-03-2025 11:20 AM
I turned on the debug and tried to ping but no output gets generated.
07-03-2025 11:27 AM
debug mpls traffic-eng path 1
Run this please done use 0
MHM
07-03-2025 11:35 AM
Still the same, no output from the debug. I also noticed that there are no labels assigned to 150.1.9.9 that is the customerB loopback and on PE2 it says drop the traffic for 150.1.9.9
But there is a label assigned to CustomerA on PE1
07-03-2025 01:46 PM - edited 07-03-2025 02:01 PM
LO you use as ip unnumbered is advertise via underlying ospf ?
I check your config and yes it adverise via underlying' you need to exclude this Ip from underlying and you must see IP as attached to tunnel
MHM
MHM
07-03-2025 02:16 PM
In that case I have to change my BGP configuration as well because iBGP and VPNv4 are through the loopback addresses. I will change it and try.
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