Routing

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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.  CoS questions

    Posted 11 days ago
    I have the followings:

    set class-of-service rewrite-rules exp voice-out forwarding-class VOICE loss-priority low code-point 101

    Does this line mean all the packets assigned to VOICE class will be marked exp bits 101 outbound ?

    set class-of-service classifiers exp voice-classifer forwarding-class VOICE loss-priority low code-points 101

    Does this line mean all the inbound packets with exp 101 will be assigned to forwarding-class VOICE ?

    Am I right ?

    thanks a lot in advance !!

     



  • 2.  RE: CoS questions
    Best Answer

    Posted 10 days ago
    Hi,

    set class-of-service rewrite-rules exp voice-out forwarding-class VOICE loss-priority low code-point 101

    Does this line mean all the packets assigned to VOICE class will be marked exp bits 101 outbound ?

    [SS] Yes, here the EXP bits of the packets egress from the VOICE forwarding class will be rewritten as 101. Once the packets have been scheduled for transmission, their DSCP/EXP headers can be rewritten based on the rewrite-rules. These rewritten headers can then be usedclassify the packets at the next-hop device.

    set class-of-service classifiers exp voice-classifer forwarding-class VOICE loss-priority low code-points 101

    Does this line mean all the inbound packets with exp 101 will be assigned to forwarding-class VOICE ?

    [SS] Yes. The inbound packets will be examined as it enters the Junos device. Based on the classification criteria, the forwarding class for the packet is determined. The forwarding-class determines which output queue the packets are placed in, as shown in the picture below.



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    Sheetanshu Shekhar
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  • 3.  RE: CoS questions

    Posted 10 days ago
    thanks for confirmation for me.