At the edge, the last router before your server has to have a mapping that a single particular IPv6 address maps to a specific MAC address.
At the edge, the last router before your server has to have a mapping that a single particular IPv6 address maps to a specific MAC address. You can't really condense this down to a single entry, because any given switchport might have multiple MAC addresses active (think of the case where you have a dumb switch attached to your router, and 20 servers attached to that dumb switch. You're looking at 20 different mac addresses, so no way to condense that down to a few entries). Even a /64 is more then enough to blow up a router at this point. The /48 just makes it a lot more likely that that will happen. The simplest solution here is to route the entire /48 at a specific IPv6 address. This brings you back down to a couple table entries, but requires that your customer configure things properly.
Posted by devicenull on Jul 7, 2015, 2:13 AM
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At the edge, the last router before your server has to have a mapping that a single particular IPv6 address maps to a specific MAC address.
At the edge, the last router before your server has to have a mapping that a single particular IPv6 address maps to a specific MAC address. You can't really condense this down to a single entry, because any given switchport might have multiple MAC addresses active (think of the case where you have a dumb switch attached to your router, and 20 servers attached to that dumb switch. You're looking at 20 different mac addresses, so no way to condense that down to a few entries). Even a /64 is more then enough to blow up a router at this point. The /48 just makes it a lot more likely that that will happen. The simplest solution here is to route the entire /48 at a specific IPv6 address. This brings you back down to a couple table entries, but requires that your customer configure things properly.
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