On 24/07/2012, at 4:45 PM, Hesham Soliman wrote: >>> >>> => The router doesn't need to know the host's route table, it knows which >>> address it included in its RAs, which is what the host records. >>> I'm not sure why you think that there is no way the router can construct >>> that message reliably. If it uses the same address it uses for its RAs, >>> it >>> can construct the message. >> >> Ah. Well, that will certainly help, but consider a situation where there >> are no RAs, > > => Where is that situation possible/deployed? It's hard to consider > something that is against the spec you're commenting on :)
Sure, it is not a situation contemplated by the ND spec. So, do you mean to say it is incorrect configuration for a router to have forwarding on and not be sending RAs, and therefore you should not send redirects if you are not sending RAs? That works as a resolution for me, in terms of specs. However, if it is not a misconfiguration, and you wish to redirect traffic that has a better first hop, or is on-link but the host for whatever reason does not know that, is that possible? Should it be? I suspect it is a common situation, no matter that it's completely broken. Andrew
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