Re: Brief outage?
My company builds mission critical systems for the emergency services ... we use dual, but independent, UPS(es) powered from different phases arriving on different power connections from the RCSs, dual but independent switches with dual power supplies (fed from separate UPSes), servers with dual power supplies, network connections with teaming/bonding, etc. and we can keep systems up for hundreds or thousands of days ... what the heck is a single UPS doing bringing down a big chunk of t'internet?
By now you would have thought that t'internet was considered part of Blighty's Critical National Infrastructure (CNI) and treated to the appropriate levels of 'protection'...
While many DSL users were off altogether our Bleedin' Terrible (BTnet) circuit appeared to route flap back and forth between Ealing and Ilford at hop #3 with interesting latencies:
root@gate:~# traceroute -n www.microsoft.com
traceroute to www.microsoft.com (104.82.195.110), 30 hops max, 60 byte packets
1 195.171.43.1 0.432 ms 0.471 ms 0.501 ms
2 62.7.207.104 5.446 ms 6.740 ms 6.737 ms
3 109.159.248.2 763.008 ms * 762.993 ms
4 213.121.193.61 9.740 ms 213.121.193.27 12.045 ms 213.121.193.45 10.009 ms
5 62.6.201.169 9.398 ms 9.828 ms 62.6.201.167 9.457 ms
6 195.99.126.19 10.034 ms 10.183 ms 13.343 ms
7 104.82.195.110 9.075 ms 9.732 ms 9.310 ms
The BTnet service page showed a red alarm for 13% packet loss in to Europe and over 20% in to Asia at the same time.
Come on BT - exactly what backup circuits do you have??? Was that a bit of 100Mbps fibre you were trying to use as a backup for a bundle of 10Gb DWDMs?
Mike