I think the right way is: Public IP address | | BRAS / DSLAM | | CPE (Routed mode - with Public IP on WAN and Private IPs on LAN / WiFi) | | Devices using NAT IP(s) OR Public IP address | | BRAS / DSLAM (Public IP on WAN / Private IP towards customer from a DHCP Server) | | CPE (in Bridge mode) | | Devices using NAT IP(s) (IPs from DHCP server) Greetings, Kusumba S www.kusumba.in On 15-11-2010 16:39, Lindqvist Kurt Erik wrote: On 15 nov 2010, at 12.02, Kusumba S wrote:Multiple layers of NAT ???? Little confusing...Perhaps I should have explained that a bit more. What I was thinking of was Home network with RFC1918 -----|CPE with NAT] | | Link with other RFC1918 addresses | DLSAM or BRAS with NAT | | Public addressesAtleast in India, most of the networks now assign Public IP address to the customer, except for some smaller networks that still use some kind of proxy to deliver services, where there is a single layer of NAT. Since, all these networks are those where there are less than 1000 customers, they use 16-bit Block (/16 prefix, 256 × C) 192.168.0.0 ~ 192.168.255.255 giving about 65536 IPs. Again, all of the DSL networks are on Public IP and some of them are even on Q-in-Q with multiple layers of VLANs. (Ofcourse, ideal way to deploy DSL / Broadband networks...)Ok, thanks! Best regards, - kurtis -
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