I'm still hoping to see a response to this. On 06/02/2013 8:42 AM, Tom Taylor wrote:
Section 5 of the latest version of MAP has the following:1. Basic Mapping Rule (BMR) - mandatory, used for IPv4 prefix, address or port set assignment. There can only be one Basic Mapping Rule per End-user IPv6 prefix. The Basic Mapping Rule is used to configure the MAP IPv6 address or prefix. 2. Forwarding Mapping Rule (FMR) - optional, used for forwarding. The Basic Mapping Rule is also a Forwarding Mapping Rule. Each Forwarding Mapping Rule will result in an entry in the Rules table for the Rule IPv4 prefix. Question: there will always be a BMR. In the absence of additional rules, how does a CE know whether it can use the BMR for forwarding or must always use the default rule? Remark: I'm not sure these two bullets tell the full story as they stand. I propose to modify them as follows: 1. Basic Mapping Rule (BMR) - mandatory. There can only be one Basic Mapping Rule per End-user IPv6 prefix. In combination with the End-user IPv6 prefix, the Basic Mapping Rule is used to derive the IPv4 prefix, address, or shared address and the PSID assigned to the CE. 2. Forwarding Mapping Rule (FMR) - optional, used for forwarding. The Basic Mapping Rule is also a Forwarding Mapping Rule. Each Forwarding Mapping Rule will result in an entry in the Rules table for the Rule IPv4 prefix. Given a destination IPv4 address and port within the MAP domain, a MAP node can use the matching FMR to derive the MAP IPv6 address of the interface through which that destination address-port combination can be reached. Tom Taylor
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