New Zealand Internet Exchange.
While NZIX was the end point for NZGate international access, which was handed to TelecomNewZealand in 1996, it was operated independently by WaikatoUniversity. Like other IXes, the equipment on it was owned by IX participants, individually "peering" with each other.
Unlike WIX & APE, NZIX started out using various IGPs for exchanging routes, including RIP, OSPF & IGRP, the latter left over from a decade of Tuia operations. IGRP was well past its use-by date by this time (not supporting classless routing, and having ghastly convergence times), but there were legacy Cisco boxes out there that couldn't manage OSPF (the IGP of choice). The less said about those exchanging routes via RIP the better. The IGP approach worked OK as long as NZIX was the only place where overseas carriers were peering, bit it started to get ugly as soon as peering points (both public such as APE & WIX, and bilateral arrangements such as those between Clear and Telecom) started to multiply.
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