Charles Sprickman <sp...@bway.net> wrote in <alpine.osx.2.00.1105170300090.1...@hotlap.nat.fasttrackmonkey.com>:
sp> First, the easy one. For IPv6 aliases, what is the proper subnet? Normally it is a /64. See also Section 2.5.4 in RFC 4291. sp> And the second one, which is also probably easy. We're going to move sp> at some point from a bunch of subnets on the same wire to having our sp> own router that gets our blocks routed to it. At that point I'd like sp> to move to routing individual IPs (or small subnets) to each host sp> behind the router. sp> sp> For example, say we have the following routed to our router: sp> sp> 10.1.0.0/27 sp> 10.2.0.0/27 sp> 10.3.0.0/27 sp> sp> All the hosts behind our router are in 10.1.0.0/27. I want to send sp> some IPs from 10.2.0.0/27 and 10.3.0.0/27 to a host at 10.1.0.2, so I sp> do the equivalent of "ip route 10.2.0.0 255.255.255.248 10.1.0.2" sp> (cisco speak) on the router box. How should the aliases on 10.1.0.2 sp> be defined? Should they all have /32 masks? Should the first get a sp> /29 and the rest a /32? sp> sp> Is this even a valid config? In reality, we have way more subnets, sp> totally non-contiguous, varying masks. With VRRP on the provider's sp> side, we immediately lose 2 IPs from each subnet in our current setup, sp> plus the network and broadcast IPs. I'm hoping that in a routed setup sp> I can regain not only the VRRP IPs but the top and bottom of each sp> subnet... Considering the scarcity of IPs these days, that would be a sp> big help. Well, I could not understand what you are trying... Is 10.1.0.2 located on 10.1.0.0/27 and acting as another nexthop router? If you want to split three subnets on a single wire into three subnets on three wires, simply configuring three /27 addresses to each interface on the router works. If you want to route a part of the traffic from specific addresses to a specific host, you can add a specific route for the address range. -- Hiroki
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