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  • 1.  Dynamic SR-TE Tunnels Based on Color community

    Posted 03-07-2024 10:15

    Hello,

    I am following the below blog post from @Anton Elita, but unfortunately cannot create dynamic-tunnels based on a given color community. I am not running BGP-LS as the tunnels are in the same IGP domain anyway.

    Inter-domain On-demand SR-TE LSPs with BGP-LS

    Juniper remove preview
    Inter-domain On-demand SR-TE LSPs with BGP-LS
    A standard-based approach to placing MPLS-based services with path constraints across multiple networks.
    View this on Juniper >

    My configuration is below:

    source-packet-routing {
    compute-profile TE_metric {
        metric-type {
            te;
        }
    }
    source-routing-path-template Template_C101 {
        primary {
            Primary_C101 {
                compute {
                    TE_metric;
                }
            }
        }
    }
}
dynamic-tunnels {
    Color_101 {
        spring-te {
            source-routing-path-template {
                Template_C101 color 101;
            }
            destination-networks {
                10.0.0.0/24;
            }
        }
    }
}

    But unfortunately, even though the VPNv4 routes are received with an Extended-Color community, I cannot create an SR-TE tunnel dynamically:

     root@PE_21> show spring-traffic-engineering lsp
    Total displayed LSPs: 0 (Up: 0, Down: 0)

    Any idea what I am missing?

    Model: vmx
    Junos: 22.1R3.9

    Kind regards,

    Fatih Kacmaz



    ------------------------------
    Fatih Kacmaz
    ------------------------------


  • 2.  RE: Dynamic SR-TE Tunnels Based on Color community

    Posted 03-07-2024 10:24
    Edited by Anton Elita 03-07-2024 10:24

    Hi Fatih,

    you'd need to check that you receive a route with "color:0:101" community, otherwise dynamic-tunnels will not get triggered.

    If you receive such a prefix, and it's part of the VPN, then you'd  either to use resolution-map, or use-transport-class (from Junos 23.4R1).

    For SR-TE to be calculated, you'd need to check that TED database is populated.

    Details are in the article that you mentioned, or here:

    https://community.juniper.net/blogs/anton-elita/2023/01/18/service-mapping-to-colored-mpls-paths

    Thanks

     Anton



    ------------------------------
    Anton Elita
    ------------------------------

    Original Message