DSCP marking on Nexus 5000

Answered Question
Apr 21st, 2010
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/* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tableau Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;}

Hello,

I'm trying to convert our existing QoS template that we use on our 3750/3560 to work on our new Nexus 5000 switches.

The ACLs and class-maps are ok, but it seems I can't do a "set dscp xx" within the policy-map on the Nexus 5000, like I was able to using the 3750/3560.

This is what I normally configure on a 3560/3750 :

policy-map QosPolicy

class VoIP

  set dscp ef

exit

class CriticalApp

  set dscp af31

exit

[...]

/* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tableau Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

class class-default

  set dscp default

exit

exit

The "set dscp xyz" command isn't available on my Nexus 5000s. I'm running NX-OS version 4.1(3)N1(1)... I'm currently unable to download version N2 from Cisco (some cryptic error about mismatched data), so I can't verify whether "set dscp" is available there in the newer version.

Have I misunderstood something about the QoS on Nexus 5000s ?


Please advise,


Alex.

Correct Answer by Jon Marshall about 7 years 3 months ago

Alex


I don't know about v4.2 but as far as i know for the Nexus 5000 switches you only have the option to set CoS values. Only the L3 capable Nexus 7000 has the capability of setting DSCP values.


Jon

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Correct Answer
Jon Marshall Wed, 04/21/2010 - 11:24
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Alex


I don't know about v4.2 but as far as i know for the Nexus 5000 switches you only have the option to set CoS values. Only the L3 capable Nexus 7000 has the capability of setting DSCP values.


Jon

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