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Unread 27-02-2016, 23:25
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Ken Streeter Ken Streeter is offline
Let the MAYHEM begin!
FRC #1519 (Mechanical Mayhem)
Team Role: Engineer
 
Join Date: Feb 2005
Rookie Year: 2005
Location: Team: Milford, NH; Me: Bedford, NH
Posts: 469
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Re: Strange mDNS behavior

Quote:
Originally Posted by Greg McKaskle View Post
I understand that static IPs are a solution of sorts, but they introduce other issues, especially when that robot shows up at an event. The robot won't connect to the field, so the CSA or FTA discovers and changes the roboRIO and DS laptop settings. But that may break the programming laptop connectivity, so the team may change it back again, ...
Are there problems with using the *correct* static IP for the roboRIO (10.te.am.2) or are the problems only when using a non-standard static IP?

We used mDNS dynamic IPs for all of the beta testing season and it worked very well as long as we used that computer only as a driver station, where the only active network interface was connected to an SSID "1519" Cisco router, with the OM5P-AN in bridge mode.

However, if we changed to our preferred situation of having two active network interfaces: (1) a physical ethernet cable to an SSID "1519" Cisco router, and (2) a WiFi DHCP connection to a different WiFi network for Internet access, we would get very unpredictable results.

Switching to a static IP address (the correct 10.te.am.2 address) helps a lot with the issues we've been seeing.

For what it's worth, we competed at the "Week Zero" scrimmage event in NH with the real FIRST field using the correct (10.te.am.2) static IP address and encountered zero problems.

Call me paranoid, but I remain a big believer in using static IP addresses for the roboRIO, the OM5P-AN bridge, any other IP devices on the robot (we use 1 or 2 Axis 206 cameras), the driver station laptop, and (when at our build area) the router which serves the "TEAM" SSID network (e.g. "1519").
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Ken Streeter - Team 1519 - Mechanical Mayhem (Milford Area Youth Homeschoolers Enriching Minds)
2015 NE District Winners with 195 & 2067, 125 & 1786, 230 & 4908, and 95 & 1307
2013 World Finalists & Archimedes Division Winners with 33 & 469
2013 & 2012 North Carolina Regional Winners with teams 435 & 4828 and 1311 & 2642
2011, 2010, 2006 Granite State Regional Winners with teams 175 & 176, 1073 & 1058, and 1276 & 133
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