@onlinestudylist.com
Subject: Re: [OSL | CCIE_Voice] L2 overhead for QoS
Hi Aman,
In case this help, the topic seems to be discussed before.
E.g. in the following thread.
- http://www.mail-archive.com/ccie_voice@onlinestudylist.com/msg06632.html
- http://www.mail-archive.com/ccie_voice@onlinestudylist.com
But voice packets font get fragmented when you use frf.12. So why would you use
8 and not 4?
On 28/06/2013, at 2:07 PM, Suresh Bhandari
bring...@gmail.commailto:bring...@gmail.com wrote:
As you've read in the QoS SRND, you use 8byte overhead for the FRF.12.
Further, somewhere I read that +5 -
As you've read in the QoS SRND, you use 8byte overhead for the FRF.12.
Further, somewhere I read that +5 - 10% bandwidth over-provisioning is
okay.
So, you can use a bandwidth equal to 48k, for four concurrent calls, for
example.
HTH
On Fri, Jun 28, 2013 at 5:55 AM, Kapuria, Aman
Hi Aman,
In case this help, the topic seems to be discussed before.
E.g. in the following thread.
- http://www.mail-archive.com/ccie_voice@onlinestudylist.com/msg06632.html
- http://www.mail-archive.com/ccie_voice@onlinestudylist.com/msg31952.html
Regards,
--Somphol.
On Fri, Jun 28, 2013 at
Hi Aman,
But voice packets font get fragmented when you use frf.12. So why would
you use 8 and not 4?
Just to try to dig up some relevant information.
*[1] On whether voice packet get fragmented.*
I agreed fully with you. If configured correctly, the voice packet should
not be fragemented.
Just one more thing I forget to highlight.
FRF.12 specification page 9 (
http://www.broadband-forum.org/technical/download/FRF.12/frf12.pdf), stated
that NLPID field must be set to 0xB1 to signify that the frame contains a
fragment.
Then, it make more sense to assume that the NLPID field exists
Anyone?
Aman
From: Kapuria, Aman
Sent: Wednesday, 26 June 2013 3:31 PM
To: ccie_voice@onlinestudylist.com
Subject: L2 overhead for QoS
Hi All,
What L2 overhead do you use for frf.12 and MLP when you calculate number of
calls over a link? Different providers have different approach around
Hi All,
What L2 overhead do you use for frf.12 and MLP when you calculate number of
calls over a link? Different providers have different approach around this. QoS
SRND says Frame Relay adds 4 bytes of Layer 2 overhead; Frame Relay with
FRF.12 adds 8 bytes. With frf.12 voice packets don't get
