Hi,

I have found the issue in my configuration and now able to perform PUSH/SWAP/POP operations for MPLS via Linux Kernel.

And I tested the same with FRR and here I am not sure about the configuration for popping a MPLS label.

To add label via zebra,
ip route 192.168.133.0/24 192.168.200.3 label 100

To swap label via zebra,
mpls lsp 100 192.168.123.4 200

To remove label via zebra,
?????

Please let me know the configuration if anyone knows.

Thanks,
Vijayalaskhmi

PS:
The issue observed with Linux configuration of static route with nexthop as IP address works fine but nexthop as interface (dev) does not work.

As the following works fine,
192.168.123.0/24  encap mpls  100 via 192.168.200.3 via 192.168.200.3 dev ens9

but this does not work,
192.168.123.0/24  encap mpls  100 via 192.168.200.3 dev ens9
On 7/16/2018 7:15 PM, Vijayalakshmi wrote:
Hi Kishore,

Thanks for your reply.

I tried the same with Linux MPLS via iproute2 configuration. Still the behavior is same.
So it is clear that the issue is not with FRR.

Let me fix the issue in my Linux kernel and get back to you if I need any support.

Regards,
Vijayalakshmi
On 7/13/2018 9:45 PM, Kishore Aramalla wrote:

Vijayalakshmi, Can you share your configuration.

 

Best,

Kishore

 

From: dev <dev-bounces@lists.frrouting.org> On Behalf Of Vijayalakshmi
Sent: Thursday, July 12, 2018 11:49 PM
To: dev@lists.frrouting.org
Subject: [dev] MPLS SWAP and POP configuration issue

 

Hello,

We are currently working with simulating a PE router in MPLS architecture.
We run zebra and ldp with below configuration
and facing issues in swapping and popping of label in zebra.

In my MPLS table I have the following entries,

zebra_2# show mpls table
 Inbound                            Outbound
   Label     Type          Nexthop     Label
--------  -------  ---------------  --------
      16      LDP    192.168.100.2         3
      17   Static    192.168.100.2        18

But still zebra is not swapping the label and also not forwarding the received traffic (inbound label 16/17) to the respective nexthop.

Is there any special command to activate mpls configuration ?
Can someone help us in a configuring zebra MPLS to pop label and swap label?

Thanks,
Vijayalakshmi