Hi, I have a question, why proctor on lab 3 Vol 2 with MLP LFI + LLQ +FRST take into account the RSVP 1st call in the PQ? (mentioned in the question)
Regards Naoufal ________________________________ De : ccie_voice-boun...@onlinestudylist.com [ccie_voice-boun...@onlinestudylist.com] de la part de kobel [findko...@gmail.com] Date d'envoi : dimanche 27 juin 2010 17:12 À : Daniel Berlinski Cc : osl osl Objet : Re: [OSL | CCIE_Voice] Lab 5 Volume 2> LLQ sizing and RSVP CAC Hi, When calculating bandwidth needed for PQ, I wouldn't take into account the value used for initial call by RSVP. It's never actually used, it's only a worst case scenario. voice packets are small and are never fragmented by FRF.12. that's why additional 4B in header are not needed. On Sun, Jun 27, 2010 at 6:50 PM, Daniel Berlinski <dberlin...@gmail.com<mailto:dberlin...@gmail.com>> wrote: Hello list Volume 2 lab 5 has a scenario asking us to allow for 4 concurrent g729 calls over Frame FRF.12 LFI using RSVP for CAC. Proctor Guide has calculated the size of the priority queue without taking into account that first call prior to capabilities exchange that RSVP negotiates at 40Kbps. In addition Proctor Guide has used Frame Relay payload of 4 Bytes instead of 8 Bytes for FR with LFI. I answered this question as follows: For 4 g729r8 concurrent calls over the WAN using RSVP for CAC: compressed ip/udp/rtp=2bytes FRF.12=8Bytes g729 payload @ 20ms=20Bytes 30*50*8/1000=12Kbps per call so 3 calls=36Kbps 1 call all @ worse case scenario compressed ip/udp/rtp=2bytes FRF.12=8Bytes g729 payload @ 10ms=10bytes 20*100*8/1000 = 1 call 16Kbps So 4 calls=36kbps + 16Kbps= 52Kbps configured in priority queue Can anyone let me know if my approach is right or wrong and if wrong why? Thanks a lot Daniel _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com<http://www.ipexpert.com>
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