From: Pavel Bykov (slidersv@gmail.com)
Date: Thu Dec 04 2008 - 22:52:23 ARST
Regarding #4: bandwidth is not reserved by default for class-default and it
can easily starve. To really alocate bandwidth to class-default so it has
minimum guarantee you'd need to use "bandwidth" command.
On Fri, Dec 5, 2008 at 1:44 AM, mahmoud genidy <ccie.mahmoud@gmail.com>wrote:
>
> 1- For [ Critical voice ] wording. Is it a proctor question to ask if he it
> requires matching precedence 5 in the ACL used to match the voice traffic?
>
> 2- Again is it a proctor question if I like to confirm if [ maximum
> reserved bandwidth 100 ] is required or not?
>
> 4- Regarding the class-default as the question says remaining bandwidth
> will go for the default class. This is the default behavior any way so I
> think no extra configuration is required for it.
>
>
>
> On Fri, Dec 5, 2008 at 3:33 AM, Pavel Bykov <slidersv@gmail.com> wrote:
>
>> Here is my take:
>> 1. I'd match udp port ranges AND precedence 5 to be sure. Maybe even mark
>> it as critical on input, depending on context of other QoS tasks.
>> 2. It does not imply that, but it does seem logical in this example, since
>> he asks you to allocate "remaining bandwidth" to default, which would be the
>> rest of the interface bandwidth
>> 3. Interface
>> 4. It is NOT POSSIBLE to configure fair-queue if you put bandwidth
>> reservation. In this case, you are asked to reserve the res to class
>> default, so you would go:
>> class class-default
>> bandwidth percent 10
>>
>> So you will not be able to put fair queue in there.
>>
>>
>> On Thu, Dec 4, 2008 at 3:16 PM, mahmoud genidy <ccie.mahmoud@gmail.com>wrote:
>>
>>> Hi
>>>
>>> I have a QoS scenario over FR link and I'm not sure which way should I
>>> go.
>>>
>>> The case is as follows.
>>>
>>> A Router *R1* with S0/0 configured with FR with two PVC on main interface
>>> (HUB). It is connected with two other routers R2 & R3 over FR as spokes.
>>>
>>> The question says: On *R1* Allocate bandwidth as follows:
>>>
>>> - % 25 of S0/0 bandwidth for network 10.1.1.0/24
>>> - % 35 of S0/0 bandwidth for network 10.1.2.0/24
>>> - % 30 of S0/0 bandwidth for CRITICAL voice traffic
>>> - Remaining bandwidth is for Class-Default
>>>
>>> My questions are:
>>>
>>> - When he says *CRITICAL* voice does this mean in the extended ACL to use
>>> precedence 5, or it is not necessary as Voice by default is critical
>>> traffic?
>>>
>>> - When he says for example %25 *OF S0/0* does this implies we have to
>>> configure [ maximum-reserved-bandwidth 100 ] ?
>>>
>>> - The interface in question is FR with two PVCs. Does this mean we have
>>> to
>>> apply the service policy through a FR MAP-CLASS with CIR equals S0?)
>>> bandwidth? Or we can directly apply the service policy on the serial
>>> interface?
>>>
>>> - Is it preffered to configure fair-queue for class-default in this case,
>>> or
>>> just leave it as it is?
>>>
>>> Thanks in advance for your time.
>>>
>>> Mahmoud
>>>
>>>
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>>
>>
>> --
>> Pavel Bykov
>> ----------------
>> Don't forget to help stopping the braindumps, use of which reduces value
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>>
>
>
-- Pavel Bykov ---------------- Don't forget to help stopping the braindumps, use of which reduces value of your certifications. Sign the petition at http://www.stopbraindumps.com/Blogs and organic groups at http://www.ccie.net
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