Routing

Hi all, 

Which traffic flow LSP go from A -> D from the scenarios below? Top or down, A-B-D or A-C-D?

a. Scenarios 1

[edit protocols mpls]
root@rA# show 
label-switched-path to-D {
    to 4.4.4.4;
    primary primary-path {
        admin-group include-any left;
    }
}

with admin-group on each Router A, B, C, D are shown respectively below 

[edit protocols mpls]
root@rA# show 
interface ge-0/0/1.0 { // facing to router B
    admin-group left
}
interface ge-0/0/2.0 { // facing to router C
    admin-group right
}

[edit protocols mpls]
root@rB# show 
interface ge-0/0/1.0 { // facing to router A
    admin-group right
}
interface ge-0/0/2.0 { // facing to router D
    admin-group left
}

[edit protocols mpls]
root@rC# show 
interface ge-0/0/1.0 { // facing to router A
    admin-group left
}
interface ge-0/0/2.0 { // facing to router D
    admin-group right
}

[edit protocols mpls]
root@rD# show 
interface ge-0/0/1.0 { // facing to router C
    admin-group left
}
interface ge-0/0/2.0 { // facing to router B
    admin-group right
}

b. Scenarios 2

[edit protocols mpls]
root@rA# show 
label-switched-path to-D {
    to 4.4.4.4;
    primary primary-path {
        admin-group include-any left;
    }
}

 with IGP metric on each Router A, B, C, D are shown respectively below 

[edit protocols ospf area 0.0.0.0]
root@rA# show 
interface ge-0/0/1.0 { // facing to router B
    metric 10;
}
interface ge-0/0/2.0 { // facing to router C
    metric 20;
}

[edit protocols ospf area 0.0.0.0]
root@rB# show 
interface ge-0/0/1.0 { // facing to router D
    metric 10;
}
interface ge-0/0/2.0 { // facing to router A
    metric 20;
}

[edit protocols ospf area 0.0.0.0]
root@rC# show 
interface ge-0/0/1.0 { // facing to router A
    metric 10;
}
interface ge-0/0/2.0 { // facing to router D
    metric 20;
}

[edit protocols ospf area 0.0.0.0]
root@rD# show 
interface ge-0/0/1.0 { // facing to router C
    metric 10;
}
interface ge-0/0/2.0 { // facing to router B
    metric 20;
}

Hope to receive 2 answers from 2 scenarios respectively.

Thank all,
Hoang Nguyen Huy

Hi,

Can you please paste your primary-path configuration as it's missing in below output.

If you remove the primary-path configuration form the protocol mpls configuration and apply "admin-group include-any Left" only then In Both scenario, LSP will follow path as below

A>B>D

HTH

Harpreet