The IETF 74 Network Morgan Sackett

General Status NOC is staffed by VeriLAN and volunteers IPv6 deployed on all segments of the IETF 74 network All meeting areas, main lobby and Urbana Tavern have wireless SSID ietf-v6ONLY is exactly that

Wireless Using Cisco 1252 access points Now only supporting a/b/g Lots of Wireless SSIDs –ietf (a/b/g) –ietf.1x (a/b/g) –ietf-a (a only) –ietf-a.1x (a only) –ietf-v6ONLY (a/b/g) [no IPv4]

Upstream Connectivity 2 DS3s with uplink to Level3 (AS 3356) Hilton’s connectivity eBGP Multi-hop for IPv4 as we aren’t directly connected IPv6 is tunneled. ISC (AS 1280), UWISC (AS 2381), PSGnet (AS 3130) Peaking around 60Mb inbound / 21Mb outbound

Wireless client rates needed to be changed to allow older clients to associate to the 1252aps n rates were disabled as it was causing throughput degradation on MacBooks, and kernel panics on some Ubuntu systems. An issue was identified with Linksys WRT54gs boxes and the new DHCP relay code on the Juniper routers. The relay was setting TTL=1. The Linksys would decrement, find the TTL expired, and rot. Changed back to old relay code which allowed us to set the TTL. Now TTL=16, just ‘cuz. DHCPv6 in stateless mode, handing out name servers and domain name.

An issue with packet loss for inbound traffic on some subnets. The issue was tracked down to existing on one of the Hilton Cisco routers that we transit through. SNMP logs showed the error, and we were able to influence a change that fixed the problem.

Network Contributors Juniper ISC WiscNET PSGnet And thanks again to Cisco for their equipment donation providing our infrastructure devices.

VeriLAN Staff Morgan Sackett James Dishongh Hans Kuhn Nick Kukich Colin Doyle Noah Weis Volunteers Jim Martin Bill Fenner Randy Bush Bill Jensen Ben Kochie Lucy Lynch Chris Liljenstolpe