AusNOG 2019 - Lightning talk - A bit of UX for NEs
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This document discusses ways to improve network experiences for users. It examines load levels on different network equipment and suggests reductions that could lower latency such as turning off ADSL interleaving and WiFi acknowledgements. It notes that humans can tolerate delays of up to 10 seconds and compares download speeds to streaming video. The conclusion emphasizes keeping users' experiences and expectations in mind to benefit both operations and users.
AusNOG 2019 - Lightning talk - A bit of UX for NEs
- 1. AusNOG 2019 A bit of UX for NEs Mark Smith markzzzsmith@gmail.com @ipv6tao @markzzzsmith
- 2. BRAS (production) Cisco 7301 ~5000 sessions ~90% load LNS (testing) Cisco 7301 ~1 or 2 sessions ~<1% load PPPoE L2TPv2
- 4. 100ms Snappiness? Internet SW DMZ SW Pubblico Firewall + VPN gateway SW LAN Router VDF Balancer Karix MOXA MNO 1 MNO 2 Morfeo Cliente 1 Cliente 2 DB quotidiano DB storico DNS Internet SW DMZ SW Pubblico Firewall + VPN gateway SW LAN Router VDF Balancer Karix MOXA MNO 1 MNO 2 Morfeo Cliente 1 Cliente 2 DB quotidiano DB storico
- 5. Reductions? Lower latency link e.g. ADSL Interleave off, Wifi Acknowledgements off. DNS Caching Resolver Closer to User e.g. In the POP/POI CDN Closer to User e.g. In the POP/POI Faster Data TCP TCP Fast Open
- 6. Old Core Switch New Core Switch 3 – 5 seconds target max Temporarily switched off: ● STP ● PaGP
- 8. Humans tolerate silent delays of up to 10 seconds.
- 10. “Fast” Uploads/Downloads? “Fast” <= 10 seconds
- 11. Fast DVD download? 4.7GB/10 seconds = 4 Gbps Fast 4K Ultra HD Blu-Ray download? 66GB/10 seconds = 56.7 Gbps
- 14. - +
- 15. Minor Packet Loss Excessive Latency/Lag Occasional service dropouts
- 16. Minor Packet Loss Excessive Latency/Lag Occasional service dropouts
- 17. Keep users’ experiences and expectations in mind. Use them to your operational advantage, and for your users benefit.