06-16-2014 03:57 PM
06-16-2014 08:54 PM
It varies according to the exact termination type and what the provider provides, but we usually perform some sort of network address translation (NAT). The T-1 presents the public IP addresses and the router translates the private addresses to that available set of public IPs using NAT - either as a pool or addresses used in round robin fashion or - usually in the event of needing incoming statically mapped addresses - a combination of a pool or single IP (for outgoing traffic) and some static NAT (for inbound-initiated traffic).
company network (with private addresses) <-router inside interface-> router (performing NAT) <- router T-1 interface-> T-1 to ISP
06-17-2014 05:04 AM
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