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Quick sanity check for si interface on LNS

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  • 1.  Quick sanity check for si interface on LNS

     
    Posted 08-28-2018 06:08

    Just a quick Sanity check question please:

     

    si interface for l2tp:

     

    show chassis hardware:

    FPC 1            REV 08   750-063183   CAJA1580          MPC2E NG HQoS

        CPU            REV 13   711-045719   CAHM5690          RMPC PMB

        MIC 0          REV 31   750-028387   CAHL3541          3D 4x 10GE  XFP

                  PIC 1                 BUILTIN      BUILTIN           2x 10GE  XFP

                        Xcvr 0     REV 01   740-014279   F174JU02815       XFP-10G-LR

     

    If I am using the above interface for the si - am I right in saying the command for the inline services will be:

    set chassis fpc 1 pic 1 tunnel-services bandwidth 10g
    set chassis fpc 1 pic 1 inline-services bandwidth 10g
    set chassis fpc 1 pic 1 max-queues-per-interface 8
    set chassis fpc 1 flexible-queuing-mode

     

    And the si interface is : si-1/1/0

     

    Does the FPC require a reboot for the change?

     

    Thanks

     



  • 2.  RE: Quick sanity check for si interface on LNS
    Best Answer

     
    Posted 08-28-2018 06:21

    Hi,

     

    set chassis fpc 1 flexible-queuing-mode -  on commit, this will require a FPC reboot but, why use this knob when your FPC is HQoS?

     

    and set chassis fpc 1 pic 1 inline-services bandwidth 10g / set chassis fpc 1 pic 1 inline-services bandwidth 10g is enough for SI and interface is si-1/1/0. Can verify through show interface terse | match si-1/1/0

     

     



  • 3.  RE: Quick sanity check for si interface on LNS

     
    Posted 08-28-2018 06:30

    Thanks Karan for the sanity check.... Just wanted to confirm... 🙂

     

    The reason for the other setting, I can't remember, but without, something didn't work.....  🙂



  • 4.  RE: Quick sanity check for si interface on LNS

     
    Posted 08-28-2018 06:37

    To add more info, flexible-queueing-mode is for non-HQoS MPC(s). In terms of subscriber(pppoe/l2tp/dhcp) use case, this knob basically helps to scale subscribers on policy/filters attached to them.

     https://www.juniper.net/documentation/en_US/junos/topics/concept/flexible-queueing-mode-overview.html

     

    For HQoS MPC, like in your case, its not required.



  • 5.  RE: Quick sanity check for si interface on LNS

     
    Posted 08-28-2018 06:39

    Ah, probably for either of the following:

     

    IPv6 MSS in the dynamic profile - or - Dynamic CoS settings



  • 6.  RE: Quick sanity check for si interface on LNS

     
    Posted 08-28-2018 06:48

    I haven't tested ipv6 mss, but for dynamic QoS or say when having multiple service attached per subscriber interface - it certainly helps in those cases when they are large in scale.

     

     



  • 7.  RE: Quick sanity check for si interface on LNS

     
    Posted 08-28-2018 07:15

    Hi Karan,

     

    Yes. I had to upgrade for the Dynamic MSS settings, but it seems to work well. I had numerous problems with MSS on IPv6 before I applied this and now it seems okay.

     

    Yes, it will be for the Dynamic CoS then..... I don't think it worked at all when we tested from a ppp subscriber on VoiP and then added the command and, bingo, it started queuing correctly and working as per documentation.

     

    Thanks for the Help Karan...