AS10357 JMUNET

JMUNET is the network of James Madison University, the public university in Harrisonburg, Virginia. The AS carries the university's campus connectivity and nothing else.

What it's used for

• Campus networking: academic departments and computing labs, student residential networks, library and administrative systems, and the university's research and online-learning infrastructure.
• The footprint is a legacy 134.126.0.0/16 — a class-B block of the era when universities were among the first organisations to get on the internet — plus a single 134.126.253.0/24 more-specific announced out of it, almost certainly for traffic engineering across its two upstreams.

Notable

• Education, and the routing shape is unambiguous. RIS sees 2 IPv4 prefixes / 65,536 addresses announced with 2 observed BGP neighbours. A whole /16 reached through two BGP sessions is the signature of a large single-tenant end-site: it consumes transit and originates only its own space. A carrier with 65k addresses would peer with hundreds of ASes; a hoster would show a far more fragmented and more recently-acquired address plan.
• Two neighbours for a Virginia public university most likely means one commodity transit provider plus a state or regional research-and-education network, which is the standard higher-education connectivity pattern.

Interesting

• The near-total absence of deaggregation is worth noting in its own right. Most organisations this size have shredded their space into dozens of /24s over the years; JMU still announces essentially one clean /16, which suggests a network that has been stable and singly-administered for a very long time.