From: akyccie (akyccie@gmail.com)
Date: Mon Sep 01 2008 - 03:26:20 ART
I think allocate means here is to reserve the min bandwidth. I guess
access-list matching the R2 subnets and then reserve bandwidth on R1
outbound would work here.
If it is restrict in place of allocate then we have to use police
-aky
----- Original Message -----
From: "Pierre-Alex GUANEL" <paguanel@gmail.com>
To: "akyccie" <akyccie@gmail.com>; <ccielab@groupstudy.com>
Sent: Monday, September 01, 2008 2:22 AM
Subject: Re: CBWFQ
> Hi, I can see two ways of solving this problem:
>
> 1) Using CBWFQ outbound on R1
>
> If we interpret "traffic from R2" as traffic transiting R2, then I would
> tag Web traffic outbound on R2 Ethernet, and use this tagging on R1
> outbound towards the WAN, to reserve 2 Mbps of bandwidth. (N.B. if R2 and
> R3 are in the same subnet, tagging on R2 is needed so we can differentiate
> which router Web traffic transited).
>
> If we interpret "traffic from R2" as traffic initiated by R2, then in you
> access-list 100, I would put all the interfaces of router R2 . I would
> then reserve bandwidth on R1 outbound.
>
>
> 2) Using a Policier inbound on R1
>
>
> If "allocate" means a "strict limit" for Web Traffic, I would use a
> policier as follows:
>
> policy-map R1_inbound
> class Web_from_R2
> police 2000000
> class class-default
> police 8000000
>
> in case "allocate" means means "at least 2 Mbps" I would do:
>
> policy-map R1_inbound
> Class Everthing_Except_Web_from_R2
> police 8000000
> class class-default
>
>
> To find if solution 1) rather than solution 2) is expected I would ask the
> proctor the following two question:
>
> a- When we are asked to "allocate bandwidth " are we expected to guarante
> bandwidth all times or only during time of congestion?
>
> b- Does "allocate bandwidth" implies a strict limit or a minimum bandwidtn
> that must be available ? ( I know it is a strechy interpratation of the
> word
> "allocate" but better ask just in case ...
>
> ref : From Webster dictionary: "To allocate is to set apart for a special
> purpose"
>
> Regards
>
> Pierre-Alex
>
>
>
>
>
> ----- Original Message -----
> From: "akyccie" <akyccie@gmail.com>
> To: <ccielab@groupstudy.com>
> Sent: Monday, August 25, 2008 8:20 PM
> Subject: CBWFQ
>
>
>> R1 is connected to R2 and R3 over ethernet. I wanted to allocated 2mb of
>> bandwidth on R1 for the web traffice coming from R2. It's seems CBWFQ
>> can't be
>> applied on input. So I guess we need to use rate limit here if aksed to
>> make
>> the change only on R1
>>
>> R1
>> access-list 100 permit ip any any eq 80
>> !
>> class-map match-all C1
>> match access-group 100
>> !
>> policy-map P1
>> class C1
>> bandwidth 2000
>> !
>> R1(config)#int fa0/0
>> R1(config-if)#service-policy input P1
>> CBWFQ : Can be enabled as an output feature only
>> !
>> R1(config-if)#service-policy output P1
>> R1(config-if)#exit
>>
>>
>> -aky
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sat Oct 04 2008 - 09:26:17 ART