Under IPv6 protocol, each device will be assigned/self-generate more than one IP addresses and 2 of them are global IP and link-local IP.
Global IP addresses are from the prefix delegation which your ISP assigned to you. You could consider them as WAN IP and they are used for internet access.
Link-local IP addresses are self-generated by clients or assigned by DHCPv6 servers to identify the clients inside LAN. You could consider link-local IPs as LAN IPs and they are used for communications within LAN.
So lets put such setup into real-world situation.
Once your ISP changes the prefix delegation, you have to change the prefix of all global IP addresses held by your devices. Link-local IP addresses and LAN connections will not be interrupted.
Under IPv6 protocol, each device will be assigned/self-generate more than one I ...
alanh999 發表於 2015-12-1 23:53
Link-local IP is the IP generated by the client itself according to the MAC address, not assigned by the router, and it is too long to remember. One way is to use unique local address(fc00::/7) which you can assign freely, but the device usually does not allow two IPv6 addresses to be configured especially in two different modes(one in dynamic and the other static), another way is to assign local DNS names pointing to different link-local IP address which also increases the difficulty to setup for home users.
Link-local IP address could be self-generated or assigned by users. Thanks for correcting me on this.
ULA occupies the global IP address slot of a host. For a device with only one NIC (virtual NIC not included) you could either use ULA or global IP most of the time. You either assign ULA using DHCPv6 or do manual IP setup on the host.
You mentioned that IPv6 addresses are long......I think this is purely a habit thing which people are so used to how IPv4 works and they exhibit change-avoiding behavior towards IPv6.
You could create an excel file to document all essential link-local IPs, ULAs or global IPs which you have to remember, or just write them down on a paper.
Identifying hosts using host names is another preferred practice for IPv6, however this is too complicated to usual home users.
Link-local IP address could be self-generated or assigned by users. Thanks for ...
alanh999 發表於 2015-12-2 06:53
Private DNS names is a good choice but home users may not understand, but I think some people who do not understand DNS may not understand how to assign static IPs to devices either.
My experience on using HE tunnel is obtaining a /48 and configure local devices like assigning IP with 2001:470:x::1,2001:470:x::2 etc. but it is transition only and also routes of Tier 1 ISP may not be as good as normal home -use ISPs due to peering locations and also partitoned network due to possible peering disputes.