Peers Randomly going unreachable

I have a new FreePBX installation with Polycom 331 phones and after a week or 2 of use in production all 26 phones go unreachable randomly throughout the day for 4 seconds.

[2017-04-11 05:28:02] VERBOSE[2556] asterisk.c: Remote UNIX connection
[2017-04-11 05:28:02] VERBOSE[29146] asterisk.c: Remote UNIX connection disconnected
[2017-04-11 06:04:47] NOTICE[2681] chan_sip.c: Peer ‘2023’ is now UNREACHABLE! Last qualify: 13
[2017-04-11 06:04:55] NOTICE[2681] chan_sip.c: Peer ‘2024’ is now UNREACHABLE! Last qualify: 13
[2017-04-11 06:04:56] NOTICE[2681] chan_sip.c: Peer ‘2006’ is now UNREACHABLE! Last qualify: 14
[2017-04-11 06:04:56] NOTICE[2681] chan_sip.c: Peer ‘2012’ is now UNREACHABLE! Last qualify: 14
[2017-04-11 06:04:56] NOTICE[2681] chan_sip.c: Peer ‘2029’ is now UNREACHABLE! Last qualify: 6
[2017-04-11 06:04:56] NOTICE[2681] chan_sip.c: Peer ‘2016’ is now UNREACHABLE! Last qualify: 14
[2017-04-11 06:04:56] NOTICE[2681] chan_sip.c: Peer ‘2020’ is now UNREACHABLE! Last qualify: 14
[2017-04-11 06:04:57] NOTICE[2681] chan_sip.c: Peer ‘2015’ is now UNREACHABLE! Last qualify: 15
[2017-04-11 06:04:58] NOTICE[2681] chan_sip.c: Peer ‘2008’ is now UNREACHABLE! Last qualify: 13
[2017-04-11 06:04:58] NOTICE[2681] chan_sip.c: Peer ‘2017’ is now UNREACHABLE! Last qualify: 13
[2017-04-11 06:04:59] NOTICE[2681] chan_sip.c: Peer ‘2019’ is now UNREACHABLE! Last qualify: 14
[2017-04-11 06:05:01] NOTICE[2681] chan_sip.c: Peer ‘2007’ is now UNREACHABLE! Last qualify: 16
[2017-04-11 06:05:06] NOTICE[2681] chan_sip.c: Peer ‘2012’ is now Reachable. (14ms / 2000ms)
[2017-04-11 06:05:06] NOTICE[2681] chan_sip.c: Peer ‘2029’ is now Reachable. (6ms / 2000ms)
[2017-04-11 06:05:06] NOTICE[2681] chan_sip.c: Peer ‘2016’ is now Reachable. (15ms / 2000ms)
[2017-04-11 06:05:06] NOTICE[2681] chan_sip.c: Peer ‘2020’ is now Reachable. (14ms / 2000ms)
[2017-04-11 06:05:07] NOTICE[2681] chan_sip.c: Peer ‘2015’ is now Reachable. (14ms / 2000ms)
[2017-04-11 06:05:12] NOTICE[2681] chan_sip.c: Peer ‘2004’ is now UNREACHABLE! Last qualify: 6
[2017-04-11 06:05:12] NOTICE[2681] chan_sip.c: Peer ‘2022’ is now UNREACHABLE! Last qualify: 13
[2017-04-11 06:05:14] NOTICE[2681] chan_sip.c: Peer ‘2011’ is now UNREACHABLE! Last qualify: 7
[2017-04-11 06:05:19] NOTICE[2681] chan_sip.c: Peer ‘2021’ is now UNREACHABLE! Last qualify: 13
[2017-04-11 06:05:20] NOTICE[2681] chan_sip.c: Peer ‘2025’ is now UNREACHABLE! Last qualify: 24
[2017-04-11 06:05:21] NOTICE[2681] chan_sip.c: Peer ‘2001’ is now UNREACHABLE! Last qualify: 7
[2017-04-11 06:05:26] NOTICE[2681] chan_sip.c: Peer ‘2010’ is now UNREACHABLE! Last qualify: 15
[2017-04-11 06:05:30] NOTICE[2681] chan_sip.c: Peer ‘2010’ is now Reachable. (15ms / 2000ms)
[2017-04-11 06:05:35] NOTICE[2681] chan_sip.c: Peer ‘2002’ is now UNREACHABLE! Last qualify: 13
[2017-04-11 06:05:38] NOTICE[2681] chan_sip.c: Peer ‘2014’ is now UNREACHABLE! Last qualify: 15
[2017-04-11 06:05:42] NOTICE[2681] chan_sip.c: Peer ‘2014’ is now Reachable. (14ms / 2000ms)
[2017-04-11 06:05:43] NOTICE[2681] chan_sip.c: Peer ‘2026’ is now UNREACHABLE! Last qualify: 22
[2017-04-11 06:05:53] NOTICE[2681] chan_sip.c: Peer ‘2026’ is now Reachable. (22ms / 2000ms)
[2017-04-11 06:06:10] NOTICE[2681] chan_sip.c: Peer ‘2012’ is now UNREACHABLE! Last qualify: 14
[2017-04-11 06:06:10] NOTICE[2681] chan_sip.c: Peer ‘2029’ is now UNREACHABLE! Last qualify: 6
[2017-04-11 06:06:10] NOTICE[2681] chan_sip.c: Peer ‘2016’ is now UNREACHABLE! Last qualify: 15
[2017-04-11 06:06:10] NOTICE[2681] chan_sip.c: Peer ‘2020’ is now UNREACHABLE! Last qualify: 14
[2017-04-11 06:06:11] NOTICE[2681] chan_sip.c: Peer ‘2015’ is now UNREACHABLE! Last qualify: 14
[2017-04-11 06:06:12] NOTICE[2681] chan_sip.c: Peer ‘2004’ is now Reachable. (7ms / 2000ms)
[2017-04-11 06:06:14] NOTICE[2681] chan_sip.c: Peer ‘2011’ is now Reachable. (7ms / 2000ms)
[2017-04-11 06:06:26] NOTICE[2681] chan_sip.c: Peer ‘2025’ is now Reachable. (24ms / 2000ms)
[2017-04-11 06:06:34] NOTICE[2681] chan_sip.c: Peer ‘2010’ is now UNREACHABLE! Last qualify: 15
[2017-04-11 06:06:37] NOTICE[2681] chan_sip.c: Peer ‘2010’ is now Reachable. (15ms / 2000ms)
[2017-04-11 06:14:09] NOTICE[2681] chan_sip.c: Peer ‘2002’ is now Reachable. (15ms / 2000ms)
[2017-04-11 06:14:42] NOTICE[2681] chan_sip.c: Peer ‘2022’ is now Reachable. (13ms / 2000ms)
[2017-04-11 06:14:44] NOTICE[2681] chan_sip.c: Peer ‘2012’ is now Reachable. (13ms / 2000ms)
[2017-04-11 06:14:44] NOTICE[2681] chan_sip.c: Peer ‘2029’ is now Reachable. (6ms / 2000ms)
[2017-04-11 06:14:44] NOTICE[2681] chan_sip.c: Peer ‘2016’ is now Reachable. (13ms / 2000ms)
[2017-04-11 06:14:44] NOTICE[2681] chan_sip.c: Peer ‘2020’ is now Reachable. (13ms / 2000ms)
[2017-04-11 06:14:45] NOTICE[2681] chan_sip.c: Peer ‘2015’ is now Reachable. (15ms / 2000ms)
[2017-04-11 06:14:49] NOTICE[2681] chan_sip.c: Peer ‘2021’ is now Reachable. (13ms / 2000ms)
[2017-04-11 06:14:51] NOTICE[2681] chan_sip.c: Peer ‘2001’ is now Reachable. (6ms / 2000ms)
[2017-04-11 06:15:13] NOTICE[2681] chan_sip.c: Peer ‘2023’ is now Reachable. (14ms / 2000ms)
[2017-04-11 06:15:21] NOTICE[2681] chan_sip.c: Peer ‘2024’ is now Reachable. (13ms / 2000ms)
[2017-04-11 06:15:22] NOTICE[2681] chan_sip.c: Peer ‘2006’ is now Reachable. (16ms / 2000ms)
[2017-04-11 06:15:24] NOTICE[2681] chan_sip.c: Peer ‘2008’ is now Reachable. (15ms / 2000ms)
[2017-04-11 06:15:24] NOTICE[2681] chan_sip.c: Peer ‘2017’ is now Reachable. (13ms / 2000ms)
[2017-04-11 06:15:25] NOTICE[2681] chan_sip.c: Peer ‘2019’ is now Reachable. (14ms / 2000ms)
[2017-04-11 06:15:27] NOTICE[2681] chan_sip.c: Peer ‘2007’ is now Reachable. (14ms / 2000ms)
[2017-04-11 06:28:02] VERBOSE[2556] asterisk.c: Remote UNIX connection
[2017-04-11 06:28:02] VERBOSE[452] asterisk.c: Remote UNIX connection disconnected
[2017-04-11 06:28:02] VERBOSE[2556] asterisk.c: Remote UNIX connection
[2017-04-11 06:28:02] VERBOSE[454] asterisk.c: Remote UNIX connection disconnected

I have tried tracking down any network issues but the topology is the same as before the new server update. BTW the call center was using a trixbox distro for 5 years before this and never had this issues before.

Help please

For the simple stuff, should we assume you already looked at this thread?

Lagged vs. Unreachable