On Jun 2, 2013, at 11:24 PM, Owen DeLong <[email protected]<mailto:[email protected]>> wrote: No, there is no use case where this is better than doing the delegations from the router that received the initial delegation (since we're apparently just arguing by vigorous assertion). Is your opinion. I disagree with your opinion and have a different opinion. It is my opinion that there are use cases.
You can't have an opinion about whether something exists. Either it exists, or it doesn't. If it exists, you can show that it exists by describing it. You can have an opinion about whether something *might* exist, but that's not the same thing. And of course you didn't state it that way, because it's a really weak argument. One example that comes to mind is if I want greater control and I want my most capable router with the greatest configuration flexibility to be in charge of the addressing scheme, but, it is not the router that interfaces with my ISP. In this case, your "edge" router is the router you attach to your ISP router; your ISP router consumes one /64, and your edge router has 65,534 left. Got anything else? My edge router is going to be the one that receives the PD delegation from the ISP. The router that I want to manage most of the delegations is not that router. In this case, I want my edge router to delegate to said other router rather than act as the central PD authority within my network. It doesn't matter how many prefixes it does or does not use, that differs from what you proposed and is a valid use case where your proposal is not desirable. What you just said is exactly what I said above. If your ISP router is crap and you don't want it managing your prefixes, delegate _all_ your prefixes from your ISP router to an internal router and have _it_ delegate the prefixes individually within the homenet (whether with PD or zOSPF). Whether the ISP router or this internal router acts as the delegator of prefixes, the prefixes are used efficiently. Do you have a point to make here, or are you just trying to win an argument through attrition?
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