Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapping-01.txt
"Andy Kessler (kessler)" <kessler@cisco.com> Thu, 16 July 2009 01:02 UTC
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Date: Wed, 15 Jul 2009 18:02:44 -0700
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Thread-Topic: RE: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapping-01.txt
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From: "Andy Kessler (kessler)" <kessler@cisco.com>
To: pim@ietf.org
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Cc: "Stig Venaas (svenaas)" <svenaas@cisco.com>, "Mike McBride (mmcbride)" <mmcbride@cisco.com>, Bharat Joshi <bharat_joshi@infosys.com>, David McWalter <DMcW@dataconnection.com>
Subject: Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapping-01.txt
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Hi, I was speaking to Stig and we came up with what we think is a workable compromise for the hash function. After steps 1-8 of the algorithm have been executed we have taken into account all of these factors: Embedded RP SSM Range, Dense mode config Static with override Longest match Bidir over SM Mapping Origin - BSR, Auto-rp, static, other The only type of Group-to-RP mappings that can be left at that point is a few overlapping mappings from only one of BSR, Auto-RP, static, or other. Step 9 currently says to pick the highest IP address. Taking into account the hash function for BSR and the issues with implementing the hash with Bidir, we can add a new step 9 for the hash: 9. If the remaining Group-to-RP mappings were learned through BSR and the PIM Mode of the Group is 'PIM-SM' then the hash function will be used to choose the RP. The RP with the highest resulting hash value will be selected. * If more than one RP has the same highest hash value we continue with the algorithm with those Group-to-RP mappings. * If the remaining Group-to-RP mappings were NOT learned from BSR we continue the algorithm with the next step 10. From the remaining set of Group-to-RP Mappings we will select the RP with the highest IP address. This will serve as a final tiebreaker. Then we can change section 9 which talks about "Migration to the new algorithm" to say that we will NOT remove the hash function and therefore it will be backward compatible. Further, before the IETF meeting we will create an ascii flowchart of the algorithm and send it out to the list. Andy
- [pim] I-D ACTION:draft-ietf-pim-group-rp-mapping-… Internet-Drafts
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… John Zwiebel
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Andy Kessler (kessler)
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Stig Venaas
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Leonard Giuliano
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Andy Kessler (kessler)
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Leonard Giuliano
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Andy Kessler (kessler)
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Andy Kessler (kessler)
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… John Zwiebel
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Stig Venaas
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… John Zwiebel
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Andy Kessler (kessler)
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Stig Venaas
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Andy Kessler (kessler)
- Re: [pim] I-D ACTION:draft-ietf-pim-group-rp-mapp… Stig Venaas