From: Michael E. Flannagan (mflannag@xxxxxxxxx)
Date: Mon Jan 29 2001 - 12:11:01 GMT-3
Alan -
If 1.1.1.1. 1.1.1.2 and 1.1.1.3 all match a single rate-limit command, and
the rate-limit is 10M, they will SHARE 10M.
This question being answer 10 times is silly...there are docs on CCO that
explain this.
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C i s c o S y s t e m s Michael E. Flannagan
| | Network Consulting Engineer
||| ||| Research Triangle Park, NC
||||||| ||||||| (919) 392-4550
.:|||||||||||:.:|||||||||||:. mflannag@cisco.com
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On Sat, 27 Jan 2001, zheng yi wrote:
> Hi Hardin, Gopal ..
> First, thanks for answers. What I conclude is that combined traffic is
> limited. But I have doubt on the conclusion.
>
> If combined traffic is limited, Cisco IOS must track each request from end
> user. That means when 1.1.1.1 is using 5M, and 1.1.1.2 comes in, IOS need to
> dynamic allocate BW for 1.1.1.2.
> This will be a big performance issue if there are large no of group users
> are defined for CAR, as Cisco IOS need to track everyone of them.
>
> What I think is that each time a user request BW, IOS will check ACL and
> allocate 10M BW. So if there is a group of users, IOS will check ACL and
> allocate same 10M BW for each of them.
>
> Can anybody verify it?
>
> tks
> Alan
>
>
>
>
> >From: Les Hardin <hardinl@bah.com>
> >Reply-To: Les Hardin <hardinl@bah.com>
> >To: "zheng yi" <drnszgy@hotmail.com>, madhu_nk@hotmail.com,
> >dgoldsmi@cisco.com
> >CC: ccielab@groupstudy.com
> >Subject: Re: CAR question
> >Date: Fri, 26 Jan 2001 19:54:57 -0500
> >
> >Zheng yi,
> >
> >Traffic is allocated at the network level specified in the
> >access-list. Therefore, traffic from 1.1.1.1, 1.1.1.2, and 1.1.1.3
> >COMBINED can not exceed the preset limit. if the first user at 1.1.1.1
> >dominates the bandwidth, users at 1.1.1.2 and 1.1.1.3 get no bandwidth,
> >i.e., their packets are dropped.
> >
> >HTH,
> >
> >Les
> >
> >
> >At 06:18 AM 1/26/2001 +0000, zheng yi wrote:
> >
> > >Probably I didn't make my question clear. Let me rephase this way.
> > >
> > >Server1 (1.1.1.1), server2 (1.1.1.2), server3 (1.1.1.3).
> > >
> > >Server1 used up 10M, can server2 use another 10M? or combined server1 and
> > >server2 will be 10M and more traffic is getting dropped.
> > >
> > >tks
> > >Alan
> > >
> > >
> > >
> > >
> > > >From: "Madhu NK" <madhu_nk@hotmail.com>
> > > >To: drnszgy@hotmail.com, dgoldsmi@cisco.com
> > > >CC: ccielab@groupstudy.com
> > > >Subject: Re: CAR question
> > > >Date: Fri, 26 Jan 2001 06:10:51
> > > >
> > > >Hi,
> > > >I think it should be like this:
> > > >
> > > >a) Traffic from 1.1.1.0 at rate less than 10Mbps go through and
> >anything
> > > >more will be dropped.
> > > >b) Traffic from 2.2.2.0 at rate less than 20Mbps ( i.e within contract)
> > > >will go through after getting precedence remarked to 5.
> > > >Traffic out of contract ie above 20M will be dropped.
> > > >c)Remaining traffic at rate less than 8 Mbps ( i,e within contract)
> > > >will go throught after remarked to precedence 5 and out of contract
> >will be
> > > >dropped.
> > > >
> > > >hope this helps
> > > >madhu
> > > >
> > > >
> > > >From: "zheng yi" <drnszgy@hotmail.com>
> > > >Reply-To: "zheng yi" <drnszgy@hotmail.com>
> > > >To: dgoldsmi@cisco.com
> > > >CC: ccielab@groupstudy.com
> > > >Subject: Re: CAR question
> > > >Date: Fri, 26 Jan 2001 04:33:20
> > > >
> > > >Hi Dave:
> > > >
> > > > >No, in the example below the users on segment 1.1.1.0 will get 10M
> > > >COMBINED
> > > > >any amount over is dropped.
> > > >
> > > >Do you mean all users on 1.1.1.0 can only have combined 10M? Or each
> > > >individual user will have 10M?
> > > >
> > > >tks
> > > >Alan
> > > >
> > > >
> > > >
> > > > >From: Dave Goldsmith <dgoldsmi@cisco.com>
> > > > >Reply-To: Dave Goldsmith <dgoldsmi@cisco.com>
> > > > >To: zheng yi <drnszgy@hotmail.com>
> > > > >CC: ccielab@groupstudy.com
> > > > >Subject: Re: CAR question
> > > > >Date: Thu, 25 Jan 2001 23:15:17 -0500
> > > > >
> > > > >Zheng Yi,
> > > > >
> > > > >No, in the example below the users on segment 1.1.1.0 will get 10M
> > > >combined
> > > > >any amount over is dropped. The users on segment 2.2.2.0 will get
> >20M of
> > > > >data marked with prec 5 anything over is dropped. Other
> > > > >traffic gets 8M of data, past that it is dropped.
> > > > >
> > > > >dave
> > > > >
> > > > >interface Serial0/0
> > > > > description 45Mbps to R2
> > > > > rate-limit input access-group 10 10000000 24000 32000
> >conform-action
> > > > > transmit exceed-action drop
> > > > > rate-limit input access-group 12 20000000 24000 32000
> >conform-action
> > > > > set-prec-transmit 5 exceed-action drop
> > > > > rate-limit input 8000000 16000 24000 conform-action
> >set-prec-transmit
> > > >5
> > > > >exceed-action
> > > > > drop
> > > > > ip address 200.200.14.250 255.255.255.252
> > > > >!
> > > > >access-list 10 permit ip 1.1.1.0 0.0.0.255
> > > > >access-list 12 permit ip 2.2.2.0 0.0.0.255
> > > > >
> > > > >zheng yi wrote:
> > > > >
> > > > > > <html><DIV>
> > > > > > <P>Hi Dave:</P>
> > > > > > <P>I don't quite understand, do you mean "the router will allocate
> >10M
> > > > >for all users if I define the network"? If so, does it
> >means
> > > > >user1 used up 5M and user2 can only use another 5M?<BR><BR>tks</P>
> > > > > > <P>Alan</P></DIV>
> > > > > > <DIV></DIV>
> > > > > > <DIV></DIV>>From: Dave Goldsmith <DGOLDSMI@CISCO.COM>
> > > > > > <DIV></DIV>>Reply-To: Dave Goldsmith <DGOLDSMI@CISCO.COM>
> > > > > > <DIV></DIV>>To: zheng yi <DRNSZGY@HOTMAIL.COM>
> > > > > > <DIV></DIV>>CC: ccielab@groupstudy.com
> > > > > > <DIV></DIV>>Subject: Re: CAR question
> > > > > > <DIV></DIV>>Date: Thu, 25 Jan 2001 22:29:30 -0500
> > > > > > <DIV></DIV>>
> > > > > > <DIV></DIV>>Zheng Yi,
> > > > > > <DIV></DIV>>
> > > > > > <DIV></DIV>>No, assuming you defined a network for the CAR
> > > >statement.
> > > > >You could set it up to give 10 to each, but the router doesn't
> >allocate
> > > >10M
> > > > >for each user if you define the network.
> > > > > > <DIV></DIV>>
> > > > > > <DIV></DIV>>Dave
> > > > > > <DIV></DIV>>
> > > > > > <DIV></DIV>>zheng yi wrote:
> > > > > > <DIV></DIV>>
> > > > > > <DIV></DIV>> >
> > > > > > <DIV>Hi: </DIV>
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>
> > > > > > <DIV></DIV>> >
> > > > > > <P>This is a question on CAR.</P>
> > > > > > <DIV></DIV>> >
> > > > > > <P>Say if I limit a group of user's traffic to 10M (I can do this
> >by
> > > > >defining an access list and control the IP address of this group
> >users),
> > > > >the question is if the rate control is aggregate. </P>
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>e.g. (control 1.1.1.0 to have only 10M BandWidth)
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>User1 (at 1.1.1.1) first requesting traffic, and used
> >up 5M
> > > > >BandWidth.
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>Meanwhile, User2 (at 1.1.1.2) requesting traffic, will
> > > >User2
> > > > >get another 10M or only get 5M?
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>
> > > > > > <DIV></DIV>> >
> > > > > > <P>As my understanding, for user1, IOS allocate 10M for
> >him since
> > > > >user1 IP falls in network 1.1.1.0 </P>
> > > > > > <DIV></DIV>> >
> > > > > > <P>For user2, IOS will allocate another 10M for him as user2 IP is
> >at
> > > > >network 1.1.1.0. </P>
> > > > > > <DIV></DIV>> >
> > > > > > <P>And as the result, 2 user will get 20M Bandwidth. </P>
> > > > > > <DIV></DIV>> >
> > > > > > <P>any commends?</P>
> > > > > > <DIV></DIV>> >
> > > > > > <P>tks </P>
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>Alan<BR clear=all>
> > > > > > <HR>
> > > > > > Get Your Private, Free E-mail from MSN Hotmail at <A
> > > > >href="http://www.hotmail.com/">http://www.hotmail.com>.<BR>
> > > > > > <P></P>
> > > > > > <DIV></DIV>> >
> > > > > > <DIV></DIV>> >
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