На одной из машин на базе Debian 7.10 Wheezy ни в какую не работает агент nxagentd.

cat /etc/nxagentd.conf
# Log File
LogFile=/var/log/nxagentd

DebugLevel = 5

# IP white list, can contain multiple records separated by comma.
# CIDR notation supported for subnets.
MasterServers=x.x.x.x

nxget -l x.x.x.x Agent.SupportedParameters
408: Request timeout

[04-May-2016 19:28:12.452] [DEBUG] Shutdown() called
[04-May-2016 19:28:12.452] [DEBUG] Waiting for data collector thread termination
[04-May-2016 19:28:12.452] [DEBUG] Stopping threads in thread pool DATACOLL
[04-May-2016 19:28:12.452] [DEBUG] Data reconciliation thread stopped
[04-May-2016 19:28:12.452] [DEBUG] Maintenance thread for thread pool DATACOLL stopped
[04-May-2016 19:28:12.453] [DEBUG] Thread pool DATACOLL destroyed
[04-May-2016 19:28:12.453] [DEBUG] Data collection scheduler thread stopped
[04-May-2016 19:28:12.453] [DEBUG] Waiting for data sender thread termination
[04-May-2016 19:28:12.453] [DEBUG] Data sender thread stopped
[04-May-2016 19:28:12.453] [DEBUG] Waiting for database writer thread termination
[04-May-2016 19:28:12.453] [DEBUG] Database writer thread stopped
[04-May-2016 19:28:12.453] [DEBUG] Waiting for data reconciliation thread termination
[04-May-2016 19:28:12.453] [DEBUG] Trap sender thread terminated
[04-May-2016 19:28:14.640] [DEBUG] [session:0] CommSession::disconnect()
[04-May-2016 19:28:14.640] [DEBUG] [session:0] Message receiving error (MSGRECV_CLOSED)
[04-May-2016 19:28:14.641] [DEBUG] [session:0] Session with x.x.x.x closed
[04-May-2016 19:28:15.641] [DEBUG] Session Watchdog thread terminated
[04-May-2016 19:28:15.641] [DEBUG] Listener thread terminated
[04-May-2016 19:28:15.789] [DEBUG] DB connection 0x135cad0 closed
[04-May-2016 19:28:15.789] [INFO ] NetXMS Agent stopped

[04-May-2016 19:28:15.812] Log file opened
[04-May-2016 19:28:15.813] [INFO ] Additional configs was loaded from /etc/nxagentd.conf.d
[04-May-2016 19:28:15.813] [INFO ] Debug level set to 5
[04-May-2016 19:28:15.813] [DEBUG] Data directory: /var/lib/netxms
[04-May-2016 19:28:15.813] [DEBUG] Subagent API initialized
[04-May-2016 19:28:15.814] [DEBUG] Validating ciphers
[04-May-2016 19:28:15.814] [DEBUG]    AES-256 enabled
[04-May-2016 19:28:15.814] [DEBUG]    Blowfish-256 enabled
[04-May-2016 19:28:15.814] [DEBUG]    IDEA disabled (config)
[04-May-2016 19:28:15.814] [DEBUG]    3DES enabled
[04-May-2016 19:28:15.814] [DEBUG]    AES-128 enabled
[04-May-2016 19:28:15.814] [DEBUG]    Blowfish-128 enabled
[04-May-2016 19:28:15.814] [DEBUG] Crypto library initialized
[04-May-2016 19:28:15.817] [DEBUG] SQLite version 3.7.13
[04-May-2016 19:28:15.817] [INFO ] DB Library: Database driver "sqlite.ddr" loaded and initialized successfully
[04-May-2016 19:28:15.817] [DEBUG] New DB connection opened: handle=0x120aad0
[04-May-2016 19:28:16.173] [DEBUG] Local database opened successfully
[04-May-2016 19:28:17.177] [DEBUG] Linux: using /sys/block to distinguish devices from partitions
[04-May-2016 19:28:17.177] [DEBUG] ParseIoStat(): new device added (name=sdb isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=sdb1 isRealDevice=0)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=sdb2 isRealDevice=0)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=sdb3 isRealDevice=0)
[04-May-2016 19:28:17.178] [DEBUG] Unable to parse /proc/drbd, DRBD data collector will not start
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=sda isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=sda1 isRealDevice=0)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=sda2 isRealDevice=0)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=sda3 isRealDevice=0)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=md0 isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=loop0 isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=loop1 isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=loop2 isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=loop3 isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=loop4 isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=loop5 isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=loop6 isRealDevice=1)
[04-May-2016 19:28:17.178] [DEBUG] ParseIoStat(): new device added (name=loop7 isRealDevice=1)
[04-May-2016 19:28:17.180] [INFO ] Subagent "linux.nsm" loaded successfully
[04-May-2016 19:28:18.181] [DEBUG] External parameters providers poller thread will not start
[04-May-2016 19:28:18.182] [DEBUG] Data sender thread started
[04-May-2016 19:28:18.182] [DEBUG] Data collection scheduler thread started
[04-May-2016 19:28:18.182] [DEBUG] Data reconciliation thread started
[04-May-2016 19:28:18.182] [DEBUG] Database writer thread started
[04-May-2016 19:28:18.182] [DEBUG] Trying to bind on 0.0.0.0:4700
[04-May-2016 19:28:18.182] [DEBUG] Trying to bind on [::]:4700
[04-May-2016 19:28:18.182] [DEBUG] Session agent connector disabled
[04-May-2016 19:28:18.182] [INFO ] Listening on socket 0.0.0.0:4700
[04-May-2016 19:28:18.182] [DEBUG] Thread pool DATACOLL initialized (min=1, max=64)
[04-May-2016 19:28:18.182] [INFO ] Listening on socket [::]:4700
[04-May-2016 19:28:19.242] [INFO ] NetXMS Agent started
[04-May-2016 19:28:27.300] [DEBUG] Incoming connection from x.x.x.x
[04-May-2016 19:28:27.300] [DEBUG] Connection from x.x.x.x accepted
[04-May-2016 19:28:27.300] [DEBUG] [session:0] Requesting parameter "Agent.Version"
[04-May-2016 19:28:27.300] [DEBUG] [session:0] Requesting parameter "System.PlatformName"
[04-May-2016 19:28:27.301] [DEBUG] [session:0] Requesting parameter "Net.IP.Forwarding"
[04-May-2016 19:28:27.301] [DEBUG] [session:0] Requesting parameter "System.Uname"
[04-May-2016 19:28:27.301] [DEBUG] [session:0] Requesting parameter "Net.Interface.64BitCounters"
[04-May-2016 19:28:31.020] [DEBUG] Incoming connection from x.x.x.x
[04-May-2016 19:28:31.020] [DEBUG] Connection from x.x.x.x accepted
[04-May-2016 19:28:31.020] [DEBUG] [session:1] Requesting list "Agent.SupportedParameters"
[04-May-2016 19:28:36.021] [DEBUG] [session:1] Message receiving error (MSGRECV_CLOSED)
[04-May-2016 19:28:36.021] [DEBUG] [session:1] Session with x.x.x.x closed
[04-May-2016 19:28:37.302] [DEBUG] [session:0] Message receiving error (MSGRECV_CLOSED)
[04-May-2016 19:28:37.302] [DEBUG] [session:0] Session with x.x.x.x closed

[04.05.2016 19:29:08] **** Poll request sent to server ****
[04.05.2016 19:29:08] Poll request accepted
[04.05.2016 19:29:09] Starting configuration poll for node Debian3
[04.05.2016 19:29:09] Checking node's capabilities...
[04.05.2016 19:29:09]    Checking NetXMS agent...
[04.05.2016 19:29:09]    NetXMS native agent is active
[04.05.2016 19:29:18] Capability check finished
[04.05.2016 19:29:19] Checking interface configuration...
[04.05.2016 19:29:23] Unable to get interface list from node
[04.05.2016 19:29:23] Interface configuration check finished
[04.05.2016 19:29:23] Checking node name
[04.05.2016 19:29:24] Node name is OK
[04.05.2016 19:29:24] Reading list of installed software packages
[04.05.2016 19:29:24] Unable to get information about installed software packages
[04.05.2016 19:29:24] Finished configuration poll for node newpppoe35
[04.05.2016 19:29:24] Node configuration was not changed after poll
[04.05.2016 19:29:24] **** Poll completed successfully ****



Пробовал переустановить весь софт в системе: dpkg --get-selections \* | awk '{print $1}' | xargs -l1 aptitude reinstall, отключать firewall. Уже всю голову сломал, не могу понять что не так. Соотвественно в DCI на этой ноде я не вижу ни одного параметра от агента. На аналогичной машинке всё работает без проблем.

Пришлите пожалуйста лог агента с дебагом 9.

Quote from: Victor Kirhenshtein on May 14, 2016, 01:38:41 PM
Пришлите пожалуйста лог агента с дебагом 9.

Перешёл на CentOS 7, там всё ок, скорее всего что-то на уровне ОС было т.к. система переносилась, а сейчас сделал чистую установку.

UP UP UP UP UP UP UP UP UP!!!

Поймал тот же самый глюк на CentOS7, система ставилась с нуля.

nxget -ne0 -I X.X.X.X
408: Request timeout

Но при этом если наложить на эту ноду шаблон - значения отдаются, но не все. Если создать новый DCI - то в списке пусто.

[14-Feb-2017 18:54:39.222] [DEBUG] [session:1] Message receiving error (MSGRECV_CLOSED)
[14-Feb-2017 18:54:39.222] [DEBUG] [session:1] Session with X.X.X.X closed

Проблема только с получением объёмных данных, листов, списков параметров.

[15-Feb-2017 14:44:21.451] [DEBUG] DataCollector: sleeping for 60 seconds
[15-Feb-2017 14:44:58.330] [DEBUG] Incoming connection from 192.168.10.10
[15-Feb-2017 14:44:58.330] [DEBUG] Connection from 192.168.10.10 accepted
[15-Feb-2017 14:44:58.330] [DEBUG] Session registered for 192.168.10.10
[15-Feb-2017 14:44:58.330] [DEBUG] [session:1] Message dump:
  ** 00B60020000000100000000000000000
  ** code=0x00B6 (CMD_GET_NXCP_CAPS) flags=0x0020 id=0 size=16 numFields=0

[15-Feb-2017 14:44:58.330] [DEBUG] [session:1] Received control message CMD_GET_NXCP_CAPS
[15-Feb-2017 14:44:58.330] [DEBUG] [session:1] Sending message CMD_NXCP_CAPS (size 16)
[15-Feb-2017 14:44:58.330] [DEBUG] [session:1] Outgoing message dump:
  ** 00B70020000000100000000003000000
  ** code=0x00B7 (CMD_NXCP_CAPS) flags=0x0020 id=0 size=16 numFields=50331648
  ** message format error (pos > size - 8)

[15-Feb-2017 14:44:58.330] [DEBUG] [session:1] Message dump:
  ** 01340000000000280000000100000003
  ** 00000097030100010000021703010001
  ** 0000021803010001
  ** code=0x0134 (CMD_SET_SERVER_CAPABILITIES) flags=0x0000 id=1 size=40 numFields=3
  ** [   151] INT16    1
  ** [   535] INT16    1
  ** [   536] INT16    1

[15-Feb-2017 14:44:58.330] [DEBUG] [session:1] Received message CMD_SET_SERVER_CAPABILITIES
[15-Feb-2017 14:44:58.331] [DEBUG] [session:1] Sending message CMD_REQUEST_COMPLETED (size 32)
[15-Feb-2017 14:44:58.331] [DEBUG] [session:1] Outgoing message dump:
  ** 001D0000000000200000000100000001
  ** 0000001C000000000000000000000000
  ** code=0x001D (CMD_REQUEST_COMPLETED) flags=0x0000 id=1 size=32 numFields=1
  ** [    28] INT32    0

[15-Feb-2017 14:44:58.331] [DEBUG] [session:1] Message dump:
  ** 00760000000000100000000200000000
  ** code=0x0076 (CMD_GET_PARAMETER_LIST) flags=0x0000 id=2 size=16 numFields=0

[15-Feb-2017 14:44:58.331] [DEBUG] [session:1] Received message CMD_GET_PARAMETER_LIST
[15-Feb-2017 14:44:58.332] [DEBUG] [session:1] Sending message CMD_REQUEST_COMPLETED (size 40880)
[15-Feb-2017 14:44:58.336] [DEBUG] [session:1] Outgoing message dump:
  ** 001D000000009FB000000002000002F2
  ** 0000001C000000000000000000000000
  ** 10000000010000000000003200410067
  ** 0065006E0074002E0041006300630065
  ** 00700074006500640043006F006E006E
  ** 0065006300740069006F006E00730000
  ** 10000001010000000000004E004E0075
  ** 006D0062006500720020006F00660020
  ** 0063006F006E006E0065006300740069
  ** 006F006E007300200061006300630065
  ** 00700074006500640020006200790020
  ** 006100670065006E0074000000000000
  ** 10000002030000011000000301000000
  ** 00000024004100670065006E0074002E
  ** 00410063006300650070007400450072
  ** 0072006F007200731000000401000000
  ** 0000003C004E0075006D006200650072
  ** 0020006F006600200061006300630065
  ** 0070007400280029002000630061006C
  ** 006C0020006500720072006F00720073
  ** 10000005030000011000000601000000
  ** 0000002E004100670065006E0074002E
  ** 0041006300740069007600650043006F
  ** 006E006E0065006300740069006F006E
  ** 00730000000000001000000701000000
  ** 0000004A004E0075006D006200650072
  ** 0020006F006600200061006300740069
  ** 0076006500200063006F006E006E0065
  ** 006300740069006F006E007300200074
  ** 006F0020006100670065006E00740000
  ** 10000008030000011000000901000000
  ** 00000038004100670065006E0074002E
  ** 00410075007400680065006E00740069
  ** 0063006100740069006F006E00460061
  ** 0069006C007500720065007300000000
  ** 1000000A0100000000000042004E0075
  ** 006D0062006500720020006F00660020
  ** 00610075007400680065006E00740069
  ** 0063006100740069006F006E00200066
  ** 00610069006C00750072006500730000
  ** 1000000B030000011000000C01000000
  ** 00000032004100670065006E0074002E
  ** 0043006F006E00660069006700750072
  ** 006100740069006F006E005300650072
  ** 00760065007200001000000D01000000
  ** 000000620043006F006E006600690067
  ** 00750072006100740069006F006E0020
  ** 00730065007200760065007200200061
  ** 00640064007200650073007300200073
  ** 006500740020006F006E002000610067
  ** 0065006E007400200073007400610072
  ** 00740075007000001000000E03000004
  ** 1000000F010000000000003800410067
  ** 0065006E0074002E0044006100740061
  ** 0043006F006C006C006500630074006F
  ** 00720051007500650075006500530069
  ** 007A0065000000001000001001000000
  ** 0000003E004100670065006E00740020
  ** 006400610074006100200063006F006C
  ** 006C006500630074006F007200200071
  ** 0075006500750065002000730069007A
  ** 00650000000000001000001103000001
  ** 10000012010000000000002800410067
  ** 0065006E0074002E004600610069006C
  ** 00650064005200650071007500650073
  ** 00740073000000001000001301000000
  ** 00000044004E0075006D006200650072
  ** 0020006F00660020006600610069006C
  ** 00650064002000720065007100750065
  ** 00730074007300200074006F00200061
  ** 00670065006E00741000001403000001
  ** 10000015010000000000002800410067
  ** 0065006E0074002E00470065006E0065
  ** 00720061007400650064005400720061
  ** 00700073000000001000001601000000
  ** 00000044004E0075006D006200650072
  ** 0020006F006600200074007200610070
  ** 0073002000670065006E006500720061
  ** 00740065006400200062007900200061
  ** 00670065006E00741000001703000003
  ** 10000018010000000000003200410067
  ** 0065006E0074002E0049007300530075
  ** 0062006100670065006E0074004C006F
  ** 00610064006500640028002A00290000
  ** 10000019010000000000004200430068
  ** 00650063006B00200069006600200067
  ** 006900760065006E0020007300750062
  ** 006100670065006E0074002000690073
  ** 0020006C006F00610064006500640000
  ** 1000001A030000001000001B01000000
  ** 00000024004100670065006E0074002E
  ** 004C0061007300740054007200610070
  ** 00540069006D00651000001C01000000
  ** 0000004000540069006D006500730074
  ** 0061006D00700020006F00660020006C
  ** 006100730074002000670065006E0065
  ** 00720061007400650064002000740072
  ** 00610070000000001000001D03000003
  ** 1000001E010000000000002E00410067
  ** 0065006E0074002E00500072006F0063
  ** 00650073007300650064005200650071
  ** 00750065007300740073000000000000
  ** 1000001F010000000000004A004E0075
  ** 006D0062006500720020006F00660020
  ** 00720065007100750065007300740073
  ** 002000700072006F0063006500730073
  ** 00650064002000620079002000610067
  ** 0
[15-Feb-2017 14:45:03.335] [DEBUG] [session:1] Message receiving error (MSGRECV_CLOSED)
[15-Feb-2017 14:45:03.335] [DEBUG] [session:1] Session with 192.168.10.10 closed

Дамп трафика где работает:

listening on igb0, link-type EN10MB (Ethernet), capture size 65535 bytes
14:47:14.703864 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [SEW], seq 552614118, win 65535, options [mss 8960,nop,wscale 14,sackOK,TS val 1510402760 ecr 0], length 0
14:47:14.703928 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [S.E], seq 3068699694, ack 552614119, win 17896, options [mss 8960,nop,nop,TS val 162865196 ecr 1510402760], length 0
14:47:14.703957 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [.], ack 1, win 65535, options [nop,nop,TS val 1510402760 ecr 162865196], length 0
14:47:14.703984 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [P.], seq 1:17, ack 1, win 65535, options [nop,nop,TS val 1510402760 ecr 162865196], length 16
14:47:14.704113 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [.], ack 17, win 17896, options [nop,nop,TS val 162865196 ecr 1510402760], length 0
14:47:14.704274 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [P.], seq 1:17, ack 17, win 17896, options [nop,nop,TS val 162865196 ecr 1510402760], length 16
14:47:14.704394 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [P.], seq 17:57, ack 17, win 65535, options [nop,nop,TS val 1510402761 ecr 162865196], length 40
14:47:14.704518 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [P.], seq 17:49, ack 57, win 17896, options [nop,nop,TS val 162865196 ecr 1510402761], length 32
14:47:14.704637 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [P.], seq 57:73, ack 49, win 65535, options [nop,nop,TS val 1510402761 ecr 162865196], length 16
14:47:14.706562 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [.], seq 49:8997, ack 73, win 17896, options [nop,nop,TS val 162865196 ecr 1510402761], length 8948
14:47:14.706633 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [.], seq 8997:17945, ack 73, win 17896, options [nop,nop,TS val 162865196 ecr 1510402761], length 8948
14:47:14.706651 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [.], ack 17945, win 62636, options [nop,nop,TS val 1510402764 ecr 162865196], length 0
14:47:14.707007 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [.], seq 17945:26893, ack 73, win 17896, options [nop,nop,TS val 162865196 ecr 1510402761], length 8948
14:47:14.707020 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [P.], seq 26893:35841, ack 73, win 17896, options [nop,nop,TS val 162865196 ecr 1510402761], length 8948
14:47:14.707034 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [.], ack 35841, win 53688, options [nop,nop,TS val 1510402764 ecr 162865196], length 0
14:47:14.707036 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [P.], seq 35841:41153, ack 73, win 17896, options [nop,nop,TS val 162865196 ecr 1510402761], length 5312
14:47:14.708907 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [F.], seq 73, ack 41153, win 48376, options [nop,nop,TS val 1510402765 ecr 162865196], length 0
14:47:14.709136 IP AGENT.IP.4700 > SERVER.IP.39578: Flags [F.], seq 41153, ack 74, win 17896, options [nop,nop,TS val 162865197 ecr 1510402765], length 0
14:47:14.709156 IP SERVER.IP.39578 > AGENT.IP.4700: Flags [.], ack 41154, win 48375, options [nop,nop,TS val 1510402765 ecr 162865197], length 0

Дамп трафика где не работает:
14:47:23.055766 IP SERVER.IP.39580 > AGENT.IP.4700: Flags [SEW], seq 2755998765, win 65535, options [mss 8960,nop,wscale 14,sackOK,TS val 2133096580 ecr 0], length 0
14:47:23.055898 IP AGENT.IP.4700 > SERVER.IP.39580: Flags [S.E], seq 1461289513, ack 2755998766, win 26844, options [mss 8960,nop,nop,TS val 672675082 ecr 2133096580], length 0
14:47:23.055929 IP SERVER.IP.39580 > AGENT.IP.4700: Flags [.], ack 1, win 65535, options [nop,nop,TS val 2133096580 ecr 672675082], length 0
14:47:23.055955 IP SERVER.IP.39580 > AGENT.IP.4700: Flags [P.], seq 1:17, ack 1, win 65535, options [nop,nop,TS val 2133096580 ecr 672675082], length 16
14:47:23.056061 IP AGENT.IP.4700 > SERVER.IP.39580: Flags [.], ack 17, win 26844, options [nop,nop,TS val 672675082 ecr 2133096580], length 0
14:47:23.056453 IP AGENT.IP.4700 > SERVER.IP.39580: Flags [P.], seq 1:17, ack 17, win 26844, options [nop,nop,TS val 672675083 ecr 2133096580], length 16
14:47:23.056571 IP SERVER.IP.39580 > AGENT.IP.4700: Flags [P.], seq 17:57, ack 17, win 65535, options [nop,nop,TS val 2133096581 ecr 672675083], length 40
14:47:23.057012 IP AGENT.IP.4700 > SERVER.IP.39580: Flags [P.], seq 17:49, ack 57, win 26844, options [nop,nop,TS val 672675083 ecr 2133096581], length 32
14:47:23.057133 IP SERVER.IP.39580 > AGENT.IP.4700: Flags [P.], seq 57:73, ack 49, win 65535, options [nop,nop,TS val 2133096581 ecr 672675083], length 16
14:47:23.300666 IP SERVER.IP.39580 > AGENT.IP.4700: Flags [P.], seq 57:73, ack 49, win 65535, options [nop,nop,TS val 2133096826 ecr 672675083], length 16
14:47:23.300782 IP AGENT.IP.4700 > SERVER.IP.39580: Flags [.], ack 73, win 26844, options [nop,nop,TS val 672675327 ecr 2133096826], length 0
14:47:28.058190 IP SERVER.IP.39580 > AGENT.IP.4700: Flags [F.], seq 73, ack 49, win 65535, options [nop,nop,TS val 2133101582 ecr 672675083], length 0
14:47:28.058562 IP AGENT.IP.4700 > SERVER.IP.39580: Flags [F.], seq 40929, ack 74, win 26844, options [nop,nop,TS val 672680085 ecr 2133101582], length 0
14:47:28.058584 IP SERVER.IP.39580 > AGENT.IP.4700: Flags [.], ack 49, win 65535, options [nop,nop,TS val 2133101583 ecr 672675083], length 0


Сервера друг от друга ничем не отличаются, конфиг агента везде одинаковый. Пока что решить не удалось.

UP. Решено, проблема из-за разных MTU на концах узлов связи и промежуточных.