From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Mon Feb 13 2006 - 11:58:13 GMT-3
CCIEin2006,
Hierarchical, or nested, policies can be a little complex! Not SURE it is the
answer to Pushkar's stated problem, but here is some background.
First thing to remember is that any bandwidth percent commands in the CHILD
policy are a percentage of the bandwidth reserved in the PARENT policy. So,
in the example below, Voice gets 50% of 40% of the bandwidth associated with
the entity that PARENT is applied to.
policy-map CHILD
> class Voice
> bandwidth percent 50
> class Mail
> bandwidth percent 50
>
> policy-map Parent
> class Voice-or-Mail
> bandwidth percent 40
> service-policy CHILD
> class HTTP
> bandwidth percent 20
> class FTP
> bandwidth percent 10
So, if Parent is applied to a 100Mbps interface, then Voice traffic has 50% X
40% X 100Mbps, or 20Mbps.
Here are a few links that might be helpful, watch the wrap:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_
c/fqcprt8/qcfmcli2.htm#1022062
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_
c/fqcprt4/qcfcbshp.htm#51807
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427
www.netmasterclass.net
----- Original Message -----
From: CCIEin2006
To: Bob Sinclair
Cc: Radioactive Frog ; Cisco certification
Sent: Monday, February 13, 2006 9:36 AM
Subject: Re: QoS scenario --> bandwidth fall back Question
Hello Bob,
Could you explain for us exactly how the nesting logic is working here? I'm
having trouble understanding it.
On 2/13/06, Bob Sinclair <bsinclair@netmasterclass.net> wrote:
>
> Pushkar,
>
> Sounds to me like you really want to reserve 40% for Voice or Mail, but
> within
> that 40% percent half should go to Voice and half should go to Mail. How
> about a hierarchical policy like this:
>
> class-map match-any Voice-or-Mail
> match class Voice
> match class Mail
>
> policy-map CHILD
> class Voice
> bandwidth percent 50
> class Mail
> bandwidth percent 50
>
> policy-map Parent
> class Voice-or-Mail
> bandwidth percent 40
> service-policy CHILD
> class HTTP
> bandwidth percent 20
> class FTP
> bandwidth percent 10
>
> HTH,
>
> Bob Sinclair
> CCIE #10427, CCSI 30427
> www.netmasterclass.net
>
> ----- Original Message -----
> From: Radioactive Frog
> To: Ccie Be ; Cisco certification ; ccielab-subscribe@groupstudy.com
> Sent: Monday, February 13, 2006 7:41 AM
> Subject: QoS scenario --> bandwidth fall back Question
>
>
> Hi Guys,
>
> Here is a scenario:-
>
> Bandwidth allocation:-
> 70 percent---------->Total traffic for QoS
> 1) 10 percent - FTP
> 2) 20 percent - HTTP
> 3) 20 percent - Voice
> 4) 20 percent - Mail
>
> In general implementation of QoS, if suppose mail is not using 20 percent
> of
> traffic it goes to COMMON POOL. and that amount of bandwidth can be
> utilised
> by any other services on the based of priority.
>
> The question is here :- If 20 percent of mail traffic is idle (free) is
> there any way around to add that bandwidth to Voice ? I don't want to put
> that in the common pool. If its possible how can we do it ?
>
> any input will be appreciated.
>
> Pushkar
>
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