MDRR on GSR

Unanswered Question
Mar 5th, 2010

Running 12.0S on GSR and queuing algorithm MDRR by MQC on SPA OC48 SIP 600.The only configuration mode allowed by MDRR on SPA OC48 is strict-priority Mode (as opposed of Alternate-priority Mode)



INITIAL SET UP and INJECTION TRAFFIC

                                                                                ________

200 Mbps VoIP      ------------------------------------->         |            |  POS 5/0

1000 Mbps FTP   -------------------------------------->          |  GSR   |  ------------------------------------------------->

1500 Mbps Default   -------------------------------------->     |_______|  2500 Mbps OC48


TOT input = 2700  ALL PACKETS SIZE is 1000




policy-map QUEUING
class VOIP
police rate percent 20 conform-action transmit exceed-action drop
priority
class FTP
bandwidth percent 50
class class-default
bandwidth percent 30


interface POS5/0
service-policy output QUEUING



What should i see?


i guest I should see:

  • 2700-2500=200 must be discarded
  • 20% of 2500 = 500 Mbps > 200 Mbps so no VoIP packet should be discarded
  • 50% 2500 = 1250 Mbps > 1000 Mbps so no FTP packets should be discarded
  • 30% 2500 = 750 Mbps < 1500 Mbps so all 200 discarded packet should belong to the default class


                                                                              ________

200 Mbps VoIP      ------------------------------------->       |            |  POS 5/0                                             200 Mbps VoIP

1000 Mbps FTP  -------------------------------------->         |  GSR   |  ------------------------------------------------->       1000 Mbps HTTP

1500 Mbps Other   -------------------------------------->     |_______|  2500 Mbps OC48                                1300 Mbps Other


TOT input = 2700                                                  200 packets discarded belong to default class



What instead I see:

                                                                                ________

200 Mbps VoIP      ------------------------------------->       |            |  POS 5/0                                             200 Mbps VoIP

1000 Mbps FTP  -------------------------------------->         |  GSR   |  ------------------------------------------------->      1000 Mbps HTTP

1500 Mbps Other   -------------------------------------->     |_______|  2500 Mbps OC48                                1300 Mbps Other


TOT input = 2700                                                  200 packets discarded belong to the VoIP,FTP and default classes



In my understanding of the algorithm MDRR correct?

Does anybody know why the algorothem seems not to be working?

Tnks

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.

Actions

This Discussion

Related Content