Hi Alessio,

It seems your dummy0 interface (which has the 1.1.1.1/32 address) is
assigned to the VRF-PUBLIC VRF, and ldpd works on the default VRF
only. Moving dummy0 to the default VRF should fix the problem.

Best Regards,
Renato.

On Fri, Jan 18, 2019 at 12:19 PM Alessio Leonarduzzi
<alessio.leonarduzzi@gmail.com> wrote:
>
> Hi all,
>
> If I set loopback interface IP as discovery transport-address in MPLS configuration the DEBUG output is:
> [CUT]
> 2019/01/17 12:05:19 LDP: nbr_establish_connection: error while binding socket to 1.1.1.1: Cannot assign requested address
> 2019/01/17 12:05:23 LDP: nbr_establish_connection: error while binding socket to 1.1.1.1: Cannot assign requested address
> 2019/01/17 12:05:27 LDP: nbr_establish_connection: error while binding socket to 1.1.1.1: Cannot assign requested address
> 2019/01/17 12:05:32 LDP: nbr_establish_connection: error while binding socket to 1.1.1.1: Cannot assign requested address
> 2019/01/17 12:05:36 LDP: nbr_establish_connection: error while binding socket to 1.1.1.1: Cannot assign requested address
> 2019/01/17 12:05:40 LDP: nbr_establish_connection: error while binding socket to 1.1.1.1: Cannot assign requested address
> [/CUT]
>
>
> but if I use the physical interface all works good.
>
> This is the configuration:
>
> vrf VRF-PUBLIC
> !
> interface dummy0 vrf VRF-PUBLIC
>  description Loopback0
>  ip address 1.1.1.1/32
> !
> interface enp2s0f0 vrf VRF-PUBLIC
>  description P2P01
>  ip address 2.2.2.2/30
>  ip ospf network point-to-point
> !
> interface enp2s0f2 vrf VRF-PUBLIC
>  description P2P02
>  ip address 3.3.3.3/30
>  ip ospf network point-to-point
> !
> mpls ldp
>  router-id 1.1.1.1
>  dual-stack cisco-interop
>  !
>  address-family ipv4
>   discovery transport-address 1.1.1.1
>   label local advertise explicit-null
>   !
>   interface enp2s0f0
>   interface enp2s0f1
>   !
>  exit-address-family
>  !
> !
>
>
> The FRR version is 6.0.2 and I need to use MPLS on two interfaces (enp2s0f0 and enp2s0f1).
>
> thank you for your help
>
> regards
>
> Alessio
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--
Renato Westphal