Routing

 View Only
last person joined: 12 hours ago 

Ask questions and share experiences about ACX Series, CTP Series, MX Series, PTX Series, SSR Series, JRR Series, and all things routing, including portfolios and protocols.
  • 1.  MPLS forwarding question

    Posted 11-22-2021 19:40
    If I have 5 routers as follows:

    CE1 ---------->PE1 ---------> P ----------> PE2 ------------> CE2

    if I used cisco routers for PE and P routers, CE1 goes to CE2 via MPLS.
    If I used Juniper for PE and P routers, CE1 goes to CE2 via IGP. This is by default for Juniper.
    I configured the following:
    set protocols mpls traffic-engineering mpls-forwarding on PE1, CE1 still go via IGP, as CE2 has not label assigned, not like in Cisco.

    Anyway can I configure to make CE1 go to CE2 via MPLS ?

    thanks !!


  • 2.  RE: MPLS forwarding question

    Posted 11-23-2021 05:36
    figured it out. I need to configure an export policy for ldp.

    thanks !!


  • 3.  RE: MPLS forwarding question

     
    Posted 11-23-2021 05:36

    Hi gongyayu.

     

    "set protocols mpls traffic-engineering mpls-forwarding" on PE1 will allow CE1->PE2 traffic to take the LSP, not CE1->CE2.

     

    Instead, there are a few ways to do this. Here are the 2 simplest ones.

     

    1. On PE1: "set routing-options static route <CE2> lsp-next-hop <PE1-PE2>"
    2. On PE1: "set protocols mpls label-switched-path <PE1-PE2> install <CE2> active"

     

    --Deepak

     

     






  • 4.  RE: MPLS forwarding question

    Posted 11-23-2021 12:27
    I did the following on PE1
    set protocols mpls label-switched-path ToCE22 to 192.168.1.6
    set protocols mpls label-switched-path ToCE22 install 22.22.22.22/32 active
    
    set routing-options static route 22.22.22.22/32 lsp-next-hop ToCE22
    
    ​

    Am I supposed to this static route in inet.3 ? 

    root@PE1# run show route 22.22.22.22
    
    inet.0: 23 destinations, 34 routes (23 active, 0 holddown, 0 hidden)
    @ = Routing Use Only, # = Forwarding Use Only
    + = Active Route, - = Last Active, * = Both
    
    22.22.22.22/32     *[OSPF/10] 09:07:20, metric 3
                        > to 10.150.201.2 via ge-0/0/0.0
    

    CE1-----> CE2 still  does not go via MPLS.

    root@CE1-LS# ...ute 22.22.22.22 source 11.11.11.11 logical-system JPath
    traceroute to 22.22.22.22 (22.22.22.22) from 11.11.11.11, 30 hops max, 40 byte packets
     1  10.150.200.1 (10.150.200.1)  2.947 ms  1.720 ms  1.654 ms
     2  10.150.201.2 (10.150.201.2)  3.123 ms  2.904 ms  2.722 ms
     3  10.150.201.6 (10.150.201.6)  4.839 ms  4.160 ms  3.831 ms
     4  22.22.22.22 (22.22.22.22)  6.063 ms  6.241 ms  5.670 ms
    


    What did I miss here ?

    thanks !!




  • 5.  RE: MPLS forwarding question

     
    Posted 11-23-2021 14:50

    Hi.

     

    My response was assuming you had an RSVP LSP from PE1 to PE3. You can ignore it since you're using LDP.

     

    --Deepak






  • 6.  RE: MPLS forwarding question

    Posted 11-23-2021 18:18
    thanks !!

    I am currently using the following to emulate what Cisco IOS does.
    set policy-options policy-statement fec-label term direct from protocol direct
    set policy-options policy-statement fec-label term direct then accept
    set policy-options policy-statement fec-label term ospf from protocol ospf
    set policy-options policy-statement fec-label term ospf then accept
    
    set protocols ldp egress-policy fec-label
    set protocols ldp interface ge-0/0/2.0
    ​