3 ms·
Scalability was one part. Later the fact that you didn't need separate routing setup for v6 also was part of it. But for a telco, the fact that you didn't have
by p_l 2y ago
Scalability was one part. Later the fact that you didn't need separate routing setup for v6 also was part of it.
But for a telco, the fact that you didn't have to setup IP connectivity in order for routers to see each other, was also a crucial ability.
- Hikikomori 2y agoOSPF has supported unnumbered links for a long time, don't need IP on the link with point to point and multicast.
- p_l 2y agoUnnumbered just means you have no IP address exclusive to the link. IS-IS works without establishing IP connectivity at all, not just about tricks to handle leaky internals. This also meant autoconfiguration or supporting non-ip protocols (like routed ethernet) is simpler, though I will admit that OSPFv3 adding default use of link local V6 for router interfaces made the gap smaller.