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jaipur.ankur
Beginner

Why Bandwidth is not reserved for incoming interfaces?

Hi,

When i put show mpls traffic-eng topology command i see reservation only on outgoing interfaces of the router. Why? Why not the incoming interfaces?

      link[0]: Broadcast, DR: 3.3.3.53, nbr_node_id:12, gen:40

          frag_id 1, Intf Address:3.3.3.35

          TE metric:1, IGP metric:1, attribute flags:0x0

          SRLGs: None

          physical_bw: 100000 (kbps), max_reservable_bw_global: 75000 (kbps)

          max_reservable_bw_sub: 0 (kbps)

                                 Global Pool       Sub Pool

               Total Allocated   Reservable        Reservable

               BW (kbps)         BW (kbps)         BW (kbps)

               ---------------   -----------       ----------

        bw[0]:            0            75000                0

        bw[1]:            0            75000                0

        bw[2]:            0            75000                0

        bw[3]:            0            75000                0

        bw[4]:            0            75000                0

        bw[5]:            0            75000                0

        bw[6]:            0            75000                0

        bw[7]:            0            75000                0

      link[1]: Broadcast, DR: 2.2.2.32, nbr_node_id:3, gen:40

          frag_id 2, Intf Address:2.2.2.32

          TE metric:1, IGP metric:1, attribute flags:0x0

          SRLGs: None

          physical_bw: 100000 (kbps), max_reservable_bw_global: 75000 (kbps)

          max_reservable_bw_sub: 0 (kbps)

                                 Global Pool       Sub Pool

               Total Allocated   Reservable        Reservable

               BW (kbps)         BW (kbps)         BW (kbps)

               ---------------   -----------       ----------

        bw[0]:            0            75000                0

        bw[1]:            0            75000                0

        bw[2]:            0            75000                0

        bw[3]:            0            75000                0

        bw[4]:            0            75000                0

        bw[5]:            0            75000                0

        bw[6]:            0            75000                0

        bw[7]:        70000             5000                0

Link 1 reservation is there but on link 0 NO RESERVATION. Why? Since link 0 is incoming interface and Link 1 is outgoing interface.of the tunnel.

1 REPLY 1
Adam Vitkovsky
Participant

Hi Ankur,

That is because MPLS TE Tunnels are unidirectional.

So they are setup only in one direction from source to destination.

Consequently the resources reserved for a particular tunnel are reserved in one direction only.

So you might want to setup a tunnel in the opposite direction as well.

adam

adam