From: Gregory Gombas (ggombas@gmail.com)
Date: Tue Oct 30 2007 - 14:57:38 ART
What is the selection criteria for Auto-RP besides longest match?
On 10/30/07, Toh Soon, Lim <tohsoon28@gmail.com> wrote:
> Hi Hadek,
>
> Noted with thanks. I guess what you mentioned can be found at this URL:
>
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/himc_c/chap05/mcbbasic.htm#wp1139318
>
>
> Thank you.
>
> B.Rgds,
> Lim TS
>
>
> On 10/30/07, hadek.el-ayachi@nsn.com <hadek.el-ayachi@nsn.com> wrote:
> >
> > RP is selected based on the following criteria, respectively:
> > 1- Longest match
> > 2- low Priority
> > 3- high hash
> > 4- high Ip address
> > In case of AutoRP, this is equivalent to the 4th condition, provided
> > that there are many condidates for the same prefix (exact match)
> >
> > ________________________________
> >
> > From: ext Toh Soon, Lim [mailto:tohsoon28@gmail.com]
> > Sent: mardi 30 octobre 2007 15:21
> > To: El Ayachi Hadek (NSN - MA/Rabat)
> > Cc: ccielab@groupstudy.com
> > Subject: Re: Auto-RP : Multiple C-RPs for the same group
> >
> >
> >
> > Hi,
> >
> > Kindly correct me if I'm wrong.
> >
> > A Mapping Agent selects the RP for a given multicast group address
> > range(s) based on the candidate RPs' IP address. The highest candidate
> > RP IP address is selected.
> >
> > In other words, the tie-breaker is purely based on C-RP's IP address.
> >
> >
> > Thank you.
> >
> > B.Rgds,
> > Lim TS
> >
> >
> >
> >
> > On 10/30/07, hadek.el-ayachi@nsn.com <hadek.el-ayachi@nsn.com> wrote:
> >
> > The task is to make R5 RP for all but 239/8, so you should use
> > selective
> > acl denying 239/8.
> > Otherwise, the RP is selected based on longest match (before
> > prefering
> > low priority, high hash or high IP address)
> > All that I know!
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com ] On
> > Behalf Of
> > ext Toh Soon, Lim
> > Sent: mardi 30 octobre 2007 13:51
> > To: ccielab@groupstudy.com
> > Subject: Auto-RP : Multiple C-RPs for the same group
> >
> > Hi Group,
> >
> > I have the following Auto-RP scenario:
> >
> > R7
> > --
> > 1. C-RP for 239.0.0.0/8
> > 2. RP address 200.0.0.7
> >
> > R5
> > --
> > 1. Mapping agent
> > 2. C-RP for all groups except 239.0.0.0/8 3. RP address
> > 200.0.0.5
> >
> > I guess one way of configuring this is, we define an ACL on R5
> > that
> > matches groups 224 until 238 (summarizing whatever we can) and
> > let R5
> > announce this group-list.
> >
> > Another way I'm thinking of is, since R7's IP address is higher
> > than
> > R5's, I will configure R5 to announce, by default, all groups.
> > When R5
> > and R7 contend for group 239.0.0.0/8, R7 will win. R5 will be RP
> > for the
> > rest of the groups. In the end, this solution meets the task
> > requirement
> > and does not violate any rules but is it acceptable?
> >
> > Please share if you have other methods.
> >
> >
> > Thank you.
> >
> > B.Rgds,
> > Lim TS
> >
> >
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