On 01/09/2015 03:17 PM, John Andersen wrote:
We installed a slow ping (interval about 5 minutes as I recall) in the Sydney server to our Alaska server and that kept the line up.
Keep alives are quite common in networking and telecommunications. I first came across them around 1978 with a pair of Data General Eclipse computers. The standby computer would watch the traffic from one specific port which contained the keep alive. If nothing happened for a period of time, it assumed the on-line computer had died and initiated a switch over. Of course, Ethernet has a Link Integrity Test (LIT) every 16 mS. Routing protocols and Spanning Tree also have keep alive traffic to ensure the other devices are working. Even my 6in4 tunnel IPv6 has a keep alive. Bottom line, periodic pings or DHCP requests should not be much of a problem. A small script in cron.hourly to ping a few times every hour should do the trick, if that DHCP request interval doesn't. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org