Re: OT: QOS on Signaling Traffic for Mobile operators, SIGTRAN,

Implementing QoS for mobile services can be rather difficult, as you
have noticed. Also, have in mind tha even though you can specify
multiple LLQ configurations, they are serviced by the same queue on
most platforms.

What you need to do here is forget what you have learned about
"enterprise" QoS and switch your mind into SP/telco mode. Signaling
and voice are essentially the same thing, QoS-wise. I would suggest
marking both with EF/EXP-5/COS-5 and service them using one generous
LLQ.

Don't forget that you don't have as many marking options when you deal
with MPLS (EXP is only 3 bits).

--
Marko
CCIE #18427 (SP)
On Mon, Apr 13, 2009 at 12:26, Ahmed Elhoussiny <aelhoussiny_at_gmail.com> wrote:
> Hello Radio,
> B  B  B  B  B  B  B  B  B  B Thanks , but i think if i used priority for the
> signaling queue i will be using 2 queues ( Voice & signaling),
> B  B  B  B  B  B  B  B  B  2 LLQs in CBWF Or to be more specified i will be using 2
> priority queues on MDRR for the GSR & CRS-1
>
> B I remember reading about this in one of my QOS references, but did it
> scale well with you, did it give you the preformance for both voice &
> signaling ?
>
> The Signaling requires min delay, RTD of B 50 ms & 100 ms. !!!!!
>
> Thanks in advance.
>
> *Ahmed Elhoussiny,CCIE # 21988*
>
> On Mon, Apr 13, 2009 at 1:22 PM, Radioactive Frog <pbhatkoti_at_gmail.com>wrote:
>
>> Normally signaling should be reserved using "bandwidth 512000' (for
>> example) command and the RTP stream should be given priority using
>> 'PRIORITY" command.
>> I've worked on many softswtich so they may be having both RTP and Signaling
>> terminated in them.
>>
>> As you've mentioned HLR signaling & replication - it will depend what are
>> the maximum delay/requirement for that perticular protocol. If you are not
>> sure about the perticular protocol behaviour then it would be safe to put
>> all signaling traffic in priority queue e.g. using "priority 512000"
>> command.
>>
>> HTH
>> -frog
>>
>>
>> On Mon, Apr 13, 2009 at 8:57 PM, Ahmed Elhoussiny <aelhoussiny_at_gmail.com>wrote:
>>
>>> Dear all,
>>> B  B  B  B  B  B  I'm working on a Mobile Operator project , to migrate his old
>>> network to an IP/MPLS NGN .
>>> B  B  B  B  B  B  B While making the QOS implementation & design , B i was
>>> gathering the information for the traffic classification & marking.
>>>
>>> B  B  B  B  B  B  And guess what, the signaling traffic is requring very low RTD
>>> , more than the VOICE itself, customer is requesting to give the Signaling
>>> more priority that the VOICE traffic.
>>>
>>>
>>> B  B  B  B  B  B  The signaling traffic I'm talking about is the signaling
>>> between the soft-switches named SIGTRAN & the HLR signaling & replication
>>> named as GDMP+GMPS
>>>
>>> So was thinking about having 2 LLQs.or having Both Traffic in same Queue.
>>>
>>> Have any one faced this before, or seen any best practise for this
>>>
>>> *Thanks & B.Regards
>>> Ahmed Elhoussiny, CCIE # 21988 (R&S)
>>> Network Consultant & Cisco Academy Instructor*
>>>
>>> *' Every class i teach , i learn something new myself '*
>>> *http://twitter.com/aelhoussiny**
>>> **www.linkedin.com/in/aelhoussiny*
>>>
>>>
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