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:: Purpose:         DHCP server Watchdog & Failover script. Read notes below
1		:: Purpose: DHCP server Watchdog & Failover script. Read notes below
2		:: Requirements: 1. Domain administrator credentials & "Logon as a batch job" rights
3		:: 2. Proper firewall configuration to allow connection
4		:: 3. Proper permissions on the DHCP backup directory
5		:: Author: vocatus on reddit.com/r/usefulscripts
6	-	:: Version: 1.2 + Added functionality to recover the DHCP database BACK to the primary server after a failure. Now when the backup server detects that
6	+	:: Version: 1.2b + Added comment block explaining syntax rules for variables
7		:: 1.2 + Added functionality to recover the DHCP database BACK to the primary server after a failure. Now when the backup server detects that
8		:: the primary server has come back online after an outage, it will export its current copy of the DHCP database, upload it back to the
9		:: primary server, import it, and spin it back up using the most recent copy. This addresses the issue of new leases being passed out during
10		:: an outage of the primary server and it not being aware of those leases when it comes back online.
11		:: + Added "REMOTE_OPERATIING_PATH" variable that lets us specify where the remote server keeps its DHCP working files during operation
12		:: + Added "UPDATED" variable to note when the script was last updated
13		:: 1.1c + Added quotes around all variables that could contain paths
14		:: + Added full path to SC.exe to prevent failure in the event %PATH% gets corrupted or mangled (this happened in testing)
15		:: * Fixed a glitch that could occur when pinging an assumed-down primary server that would incorrectly think it was back up
16		:: - Removed almost every entry of "2>&1" since it's really not needed
17		:: 1.1b - Changed DATE to CUR_DATE format to be consistent with all other scripts
18		:: 1.1 - Comments improvement
19		:: / Tuned some parameters (ping count on checking)
20		:: / Some logging tweaks
21		:: / Renamed FAILOVER_DELAY to FAILOVER_RECHECK_DELAY for clarity
22		:: 1.0d * Some logging tweaks
23		:: 1.0c * Some logging tweaks
24		:: 1.0 Initial write
25		:: Notes: I wrote this script after failing to find a satisfactory method of performing
26		:: watchdog/failover between two Windows Server 2008 R2 DHCP servers.
27		::
28		:: Use: This script has two modes: "Watchdog" and "Failover."
29		:: - Watchdog checks the status of the remote DHCP service, logs it, and then grabs the remote DHCP db backup file and imports it.
30		:: - Failover mode is activated when the script cannot determine the status of the remote DHCP server. The script then activates
31		:: the local DHCP server with the latest backup copy it successfully retrieved from the primary server.
32		::
33		:: Instructions:
34		:: 1. Tune the variables in this script to your desired backup location and frequency
35		:: 2. On the primary server: set the DHCP backup interval to your desired backup frequency. The value is in minutes; I recommend 5 minutes.
36		:: You do this by modifying this registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DHCPServer\Parameters\BackupInterval
37		:: 3. On the backup server: set this script to run as a scheduled task. I recommend every 10 minutes.
38		:: Notice:
39		:: !! Make sure to set it only to run if it isn't already running! If there is a failover you could have
40		:: Task Scheduler spawn a new instance of the script every n minutes and end up with hundreds of copies
41		:: of this script running.
42
43
44		:: Prep
45		SETLOCAL
46		@echo off
47	-	set VERSION=1.2
47	+
48	-	set UPDATED=2013-09-09
48	+	set VERSION=1.2b
49		set UPDATED=2013-09-16
50		title [DHCP Server Watchdog v%VERSION%]
51
52
53	-	:: Variables :: - Set these. Do not use trailing slashes (\) in directory names (this is important!).
53	+
54		:: VARIABLES :: - Set these
55		:::::::::::::::
56		:: Rules for variables:
57	-	set REMOTE_SERVER=MY-DHCP-SERVER
57	+	:: * NO quotes! (bad: "c:\directory\path" )
58		:: * NO trailing slashes on the path! (bad: c:\directory\ )
59		:: * Spaces are okay (okay: c:\my folder\with spaces )
60		:: * Network paths are okay (okay: \\server\share name )
61		:: ( \\172.16.1.5\share name )
62
63		:: Remote server is the PRIMARY DHCP server we're watching. Use a hostname or IP address.
64		set REMOTE_SERVER=mikado
65
66		:: Location of the automatic DHCP backup file on the primary server. Windows generates this automatically.
67		:: Best practice is to leave this alone, unless you have a custom backup location.
68		:: The script builds the backup line like this: \\%REMOTE_SERVER%\c$\%REMOTE_BACKUP_PATH%
69		set REMOTE_BACKUP_PATH=Windows\system32\dhcp\backup
70
71		:: Location of the operational DHCP database files on the remote (primary) server.
72		:: Best practice is to leave this alone, unless you have a custom location. Changing this will break the
73		:: function that re-uploads the most current db back to the primary server after a failure. This doesn't
74		:: ruin the script, but if the backup server passed out any IP's while the primary server was down, the
75		:: primary server won't know about them when it comes back up.
76		set REMOTE_OPERATING_PATH=Windows\system32\dhcp
77
78		:: Location of your backup/standby file. I normally copy directly to my backup server's DHCP directory.
79		:: The script builds the local backup line like this: c:\windows\system32\dhcp\[backup folders]
80		set LOCAL_BACKUP_PATH=%SystemRoot%\system32\dhcp
81
82		:: When a failover is triggered, how many seconds should we wait in between each attempt to contact the primary server again?
83		set FAILOVER_RECHECK_DELAY=15
84
85		:: Log options. Don't put an extension on the log file name. (Important!) The script sets this later on.
86		set LOGPATH=%SystemDrive%\Logs
87		set LOGFILE=%COMPUTERNAME%_DHCP_watchdog
88
89		:: Max log file size allowed (in bytes) before rotation and archive. I recommend setting this to 2 MB (2097152).
90		:: Example: 524288 is half a megabyte (~500KB)
91		set LOG_MAX_SIZE=10485760
92
93		:: \/ Don't touch anything below this line. If you do, you will break something.
94		set CUR_DATE=%DATE:~-4%-%DATE:~4,2%-%DATE:~7,2%
95
96
97		:::::::::::::::::::::::
98		:: LOG FILE HANDLING :: - This section handles the log file
99		:::::::::::::::::::::::
100
101		:: Make the logfile if it doesn't exist
102		if not exist %LOGPATH% mkdir %LOGPATH%
103		if not exist %LOGPATH%\%LOGFILE%.log goto new_log
104
105		:: Check log size. If it hasn't exceeded our size limit, jump straight to Watchdog mode
106		for %%R in (%LOGPATH%\%LOGFILE%.log) do if %%~zR LSS %LOG_MAX_SIZE% goto newrun
107
108		:: However, if the log was too big, go ahead and rotate it.
109		pushd %LOGPATH%
110		del %LOGFILE%.ancient 2>NUL
111		rename %LOGFILE%.oldest %LOGFILE%.ancient 2>NUL
112		rename %LOGFILE%.older %LOGFILE%.oldest 2>NUL
113		rename %LOGFILE%.old %LOGFILE%.older 2>NUL
114		rename %LOGFILE%.log %LOGFILE%.old 2>NUL
115		popd
116
117		:: And then create the header for the new log file
118		:new_log
119		echo ------------------------------------------------------------------------------------->> %LOGPATH%\%LOGFILE%.log
120		echo Initializing new DHCP Server Watchdog log on %CUR_DATE% at %TIME%, max log size %LOG_MAX_SIZE% bytes>> %LOGPATH%\%LOGFILE%.log
121		echo ------------------------------------------------------------------------------------->> %LOGPATH%\%LOGFILE%.log
122		echo.>> %LOGPATH%\%LOGFILE%.log
123
124		:: New run section - if we just launched the script, write a header for this run
125		:newrun
126		echo ------------------------------------------------------------------------------------->> %LOGPATH%\%LOGFILE%.log
127		echo DHCP Server Watchdog v%VERSION%, %CUR_DATE%>> %LOGPATH%\%LOGFILE%.log
128		echo Running as %USERDOMAIN%\%USERNAME% on %COMPUTERNAME%>> %LOGPATH%\%LOGFILE%.log
129		echo.>> %LOGPATH%\%LOGFILE%.log
130		echo Job Options>> %LOGPATH%\%LOGFILE%.log
131		echo Log location: %LOGPATH%\%LOGFILE%.log>> %LOGPATH%\%LOGFILE%.log
132		echo Log max size: %LOG_MAX_SIZE% bytes>> %LOGPATH%\%LOGFILE%.log
133		echo Watching primary server: %REMOTE_SERVER%>> %LOGPATH%\%LOGFILE%.log
134		echo Mirroring this DHCP db: %REMOTE_BACKUP_PATH%>> %LOGPATH%\%LOGFILE%.log
135		echo Local backup location: %LOCAL_BACKUP_PATH%>> %LOGPATH%\%LOGFILE%.log
136		echo ------------------------------------------------------------------------------------->> %LOGPATH%\%LOGFILE%.log
137		echo %CUR_DATE% %TIME% Starting Watchdog mode.>> %LOGPATH%\%LOGFILE%.log
138		echo.
139		echo DHCP Server Watchdog v%VERSION%
140		echo Running as: %USERDOMAIN%\%USERNAME% on %COMPUTERNAME%
141		echo Log: %LOGPATH%\%LOGFILE%.log
142
143
144		:::::::::::::::::::
145		:: WATCHDOG MODE ::
146		:::::::::::::::::::
147		:watchdog
148
149		:: Ping the server to see if it's up
150		echo.
151		echo Verifying proper operation of DHCP server on %REMOTE_SERVER%, please wait...
152		echo.
153		echo %CUR_DATE% %TIME% Pinging %REMOTE_SERVER%...>> %LOGPATH%\%LOGFILE%.log
154		echo %CUR_DATE% %TIME% Pinging %REMOTE_SERVER%...
155		ping %REMOTE_SERVER% -n %FAILOVER_RECHECK_DELAY% >NUL
156		if %ERRORLEVEL%==1 echo %CUR_DATE% %TIME% WARNING %REMOTE_SERVER% failed to respond to ping. && echo %CUR_DATE% %TIME% WARNING %REMOTE_SERVER% failed to respond to ping.>> %LOGPATH%\%LOGFILE%.log
157		if not %ERRORLEVEL%==1 echo %CUR_DATE% %TIME% SUCCESS %REMOTE_SERVER% responded to ping. && echo %CUR_DATE% %TIME% SUCCESS %REMOTE_SERVER% responded to ping.>> %LOGPATH%\%LOGFILE%.log
158
159		:: Check & Log
160		echo %CUR_DATE% %TIME% Checking DHCP server status on %REMOTE_SERVER%...>> %LOGPATH%\%LOGFILE%.log
161		echo %CUR_DATE% %TIME% Checking DHCP server status on %REMOTE_SERVER%...
162
163		:: Reset ERRORLEVEL back to 0
164		ver > NUL
165
166		:: Use "SC" to check the status of "Dhcpserver" service, find the "RUNNING" state, and act accordingly based on the return code
167		%WINDIR%\System32\sc.exe \\%REMOTE_SERVER% query Dhcpserver \| find "RUNNING" >NUL
168		if %ERRORLEVEL%==0 echo %CUR_DATE% %TIME% SUCCESS The DHCP service is running on %REMOTE_SERVER%.>> %LOGPATH%\%LOGFILE%.log
169		if %ERRORLEVEL%==0 echo %CUR_DATE% %TIME% SUCCESS The DHCP service is running on %REMOTE_SERVER%.
170
171		:: This section only executes if the test failed.
172		if not %ERRORLEVEL%==0 (
173		echo %CUR_DATE% %TIME% FAILURE The DHCP service is not running on %REMOTE_SERVER%.>> %LOGPATH%\%LOGFILE%.log
174		echo %CUR_DATE% %TIME% Activating failover procedure. Local DHCP server will be initialized using most recent successful backup.>> %LOGPATH%\%LOGFILE%.log
175		echo %CUR_DATE% %TIME% FAILURE The DHCP service is not running on %REMOTE_SERVER%.
176		echo %CUR_DATE% %TIME% Activating failover procedure. Local DHCP server will be initialized using most recent successful backup.
177		goto failover
178		)
179
180		:: Reset ERRORLEVEL back to 0
181		ver > NUL
182
183		:: Fetch
184		echo %CUR_DATE% %TIME% Fetching DHCP database backup from %REMOTE_SERVER%...>> %LOGPATH%\%LOGFILE%.log
185		echo %CUR_DATE% %TIME% Fetching DHCP database backup from %REMOTE_SERVER%...
186		xcopy "\\%REMOTE_SERVER%\c$\%REMOTE_BACKUP_PATH%\*" "%LOCAL_BACKUP_PATH%\backup_new_pending\" /E /Y /Q >NUL
187
188		:: If the copy SUCCEEDED, this executes
189		if %ERRORLEVEL%==0 (
190		echo %CUR_DATE% %TIME% SUCCESS Backup fetched from %REMOTE_SERVER%.>> %LOGPATH%\%LOGFILE%.log
191		echo %CUR_DATE% %TIME% SUCCESS Backup fetched from %REMOTE_SERVER%.
192		echo %CUR_DATE% %TIME% Rotating database backups...>> %LOGPATH%\%LOGFILE%.log
193		echo %CUR_DATE% %TIME% Rotating database backups...
194		:: Rotate backups and use newest copy
195		rmdir /S /Q %LOCAL_BACKUP_PATH%\backup5
196		if exist "%LOCAL_BACKUP_PATH%\backup4" move /Y "%LOCAL_BACKUP_PATH%\backup4" "%LOCAL_BACKUP_PATH%\backup5"
197		if exist "%LOCAL_BACKUP_PATH%\backup3" move /Y "%LOCAL_BACKUP_PATH%\backup3" "%LOCAL_BACKUP_PATH%\backup4"
198		if exist "%LOCAL_BACKUP_PATH%\backup2" move /Y "%LOCAL_BACKUP_PATH%\backup2" "%LOCAL_BACKUP_PATH%\backup3"
199		if exist "%LOCAL_BACKUP_PATH%\backup" move /Y "%LOCAL_BACKUP_PATH%\backup" "%LOCAL_BACKUP_PATH%\backup2"
200		move /Y "%LOCAL_BACKUP_PATH%\backup_new_pending" "%LOCAL_BACKUP_PATH%\backup" >NUL
201		echo %CUR_DATE% %TIME% Database backups rotated.>> %LOGPATH%\%LOGFILE%.log
202		echo %CUR_DATE% %TIME% Database backups rotated.
203		)
204
205		:: If the copy FAILED, this executes:
206		if not %ERRORLEVEL%==0 (
207		echo %CUR_DATE% %TIME% WARNING There was an error copying the backup from %REMOTE_SERVER%.>> %LOGPATH%\%LOGFILE%.log
208		echo %CUR_DATE% %TIME% You may want to look into this since we were able to check the DHCPserver service status but the file copy failed.>> %LOGPATH%\%LOGFILE%.log
209		echo %CUR_DATE% %TIME% Skipping new database import due to copy failure.>> %LOGPATH%\%LOGFILE%.log
210		echo %CUR_DATE% %TIME% Job complete with errors.>> %LOGPATH%\%LOGFILE%.log
211		echo %CUR_DATE% %TIME% WARNING There was an error copying the backup from %REMOTE_SERVER%.
212		echo %CUR_DATE% %TIME% You may want to look into this since we were able to check the DHCPserver service status but the file copy failed.
213		echo %CUR_DATE% %TIME% Skipping new database import due to copy failure.
214		echo %CUR_DATE% %TIME% Job complete with errors.
215		)
216
217		:: Import database
218		echo %CUR_DATE% %TIME% Starting local DHCP server to import new database...>> %LOGPATH%\%LOGFILE%.log
219		echo %CUR_DATE% %TIME% Starting local DHCP server to import new database...
220		net start Dhcpserver
221		echo %CUR_DATE% %TIME% Local DHCP server running. Performing import...>> %LOGPATH%\%LOGFILE%.log
222		echo %CUR_DATE% %TIME% Local DHCP server running. Performing import...
223		netsh dhcp server restore "%LOCAL_BACKUP_PATH%\backup"
224		echo %CUR_DATE% %TIME% Import complete.>> %LOGPATH%\%LOGFILE%.log
225		echo %CUR_DATE% %TIME% Import complete.
226		echo %CUR_DATE% %TIME% Stopping local DHCP server...>> %LOGPATH%\%LOGFILE%.log
227		echo %CUR_DATE% %TIME% Stopping local DHCP server...
228		sc stop Dhcpserver
229		echo %CUR_DATE% %TIME% Local DHCP server stopped.>> %LOGPATH%\%LOGFILE%.log
230		echo %CUR_DATE% %TIME% Local DHCP server stopped.
231		echo %CUR_DATE% %TIME% SUCCESS Job complete, DHCP database backed up and ready for use. Exiting.>> %LOGPATH%\%LOGFILE%.log
232		echo %CUR_DATE% %TIME% SUCCESS Job complete, DHCP database backed up and ready for use. Exiting.
233		goto EOF
234
235
236		:::::::::::::::::::
237		:: FAILOVER MODE ::
238		:::::::::::::::::::
239
240		:failover
241		:: Log this AND display to console
242		echo %CUR_DATE% %TIME% WARNING Failover activated.>> %LOGPATH%\%LOGFILE%.log
243		echo %CUR_DATE% %TIME% Starting local DHCP server using most recent successful backup...>> %LOGPATH%\%LOGFILE%.log
244		echo.
245		echo %CUR_DATE% %TIME% WARNING Could not contact primary DHCP server %REMOTE_SERVER%. Failover activated.
246		echo %CUR_DATE% %TIME% Starting local DHCP server using most recent successful backup...
247		echo.
248		net start Dhcpserver
249		echo %CUR_DATE% %TIME% Local DHCP server started.>> %LOGPATH%\%LOGFILE%.log
250		echo %CUR_DATE% %TIME% Entering monitoring loop. Checking if %REMOTE_SERVER% is back up every %FAILOVER_RECHECK_DELAY% seconds...>> %LOGPATH%\%LOGFILE%.log
251		echo %CUR_DATE% %TIME% Local DHCP server started.
252		echo %CUR_DATE% %TIME% Entering monitoring loop. Checking if %REMOTE_SERVER% is back up every %FAILOVER_RECHECK_DELAY% seconds...
253
254
255		:failover_loop
256		:: First we ping the server
257		ping %REMOTE_SERVER% -n 5 >NUL
258		:: If no ping response, this section executes
259		IF NOT %ERRORLEVEL%==0 (
260		echo %CUR_DATE% %TIME% FAILURE No ping response from %REMOTE_SERVER%. Waiting %FAILOVER_RECHECK_DELAY% seconds to check again.>> %LOGPATH%\%LOGFILE%.log
261		echo %CUR_DATE% %TIME% FAILURE No ping response from %REMOTE_SERVER%. Waiting %FAILOVER_RECHECK_DELAY% seconds to check again.
262		ping localhost -n %FAILOVER_RECHECK_DELAY% >NUL
263		goto failover_loop
264		)
265
266		:: If yes ping response, this section executes
267		:: This declaration is required to get the nested IF ERRORLEVEL test to function correctly
268		SETLOCAL ENABLEDELAYEDEXPANSION
269		if not %ERRORLEVEL%==1 (
270		echo %CUR_DATE% %TIME% NOTICE %REMOTE_SERVER% is responding to pings.>> %LOGPATH%\%LOGFILE%.log
271		echo %CUR_DATE% %TIME% NOTICE %REMOTE_SERVER% is responding to pings.
272		echo %CUR_DATE% %TIME% Checking DHCP server status on %REMOTE_SERVER%...>> %LOGPATH%\%LOGFILE%.log
273		echo %CUR_DATE% %TIME% Checking DHCP server status on %REMOTE_SERVER%...
274
275		:: This section checks to see if the Dhcpserver service is back up and acts accordingly
276		%WINDIR%\System32\sc.exe \\%REMOTE_SERVER% query Dhcpserver \| find "RUNNING" >NUL
277		:: The exclamation points around ERRORLEVEL here prevent it from incorrectly being expanded using the external ERRORLEVEL results from the first IF statement
278		if !ERRORLEVEL!==0 (
279		echo %CUR_DATE% %TIME% SUCCESS The DHCP service is running on %REMOTE_SERVER%.>> %LOGPATH%\%LOGFILE%.log
280		echo %CUR_DATE% %TIME% SUCCESS The DHCP service is running on %REMOTE_SERVER%.
281		echo %CUR_DATE% %TIME% Primary DHCP server %REMOTE_SERVER% is back up. Beginning recovery procedures...>> %LOGPATH%\%LOGFILE%.log
282		echo %CUR_DATE% %TIME% Primary DHCP server %REMOTE_SERVER% is back up. Beginning recovery procedures...
283
284		:: Back up the database that we've been running temporarily while the primary server was down
285		echo %CUR_DATE% %TIME% Exporting the current DHCP database...>> %LOGPATH%\%LOGFILE%.log
286		echo %CUR_DATE% %TIME% Exporting the current DHCP database...
287		netsh dhcp server backup %TEMP%\DHCP-RECOVERY
288
289		:: Stop our local server since we're done performing DHCP server duties
290		echo %CUR_DATE% %TIME% Stopping local DHCP server...>> %LOGPATH%\%LOGFILE%.log
291		echo %CUR_DATE% %TIME% Stopping local DHCP server...
292		sc stop Dhcpserver
293
294		:: Send the database back to the primary server
295		echo %CUR_DATE% %TIME% Uploading current DHCP database to %REMOTE_SERVER%...>> %LOGPATH%\%LOGFILE%.log
296		echo %CUR_DATE% %TIME% Uploading current DHCP database to %REMOTE_SERVER%...
297		xcopy "%TEMP%\DHCP-RECOVERY\*" "\\%REMOTE_SERVER%\c$\%REMOTE_OPERATING_PATH%\DHCP-RECOVERY\" /S /Y /Q 2>NUL
298
299		:: Import the current database on the primary server
300		echo %CUR_DATE% %TIME% Importing current DHCP database on %REMOTE_SERVER%...>> %LOGPATH%\%LOGFILE%.log
301		echo %CUR_DATE% %TIME% Importing current DHCP database on %REMOTE_SERVER%...
302		netsh dhcp server \\%REMOTE_SERVER% restore "\\%REMOTE_SERVER%\c$\%REMOTE_OPERATING_PATH%\DHCP-RECOVERY"
303		:: force a delay to let it stop
304		ping -n 4 localhost >NUL
305
306		:: Spin the primary server back up. For some reason we have to run the command twice for it to actually start. Don't ask.
307		echo %CUR_DATE% %TIME% Restarting DHCP server on %REMOTE_SERVER%...>> %LOGPATH%\%LOGFILE%.log
308		echo %CUR_DATE% %TIME% Restarting DHCP server on %REMOTE_SERVER%...
309		sc \\%REMOTE_SERVER% stop Dhcpserver
310		ping localhost -n 8 >NUL
311		sc \\%REMOTE_SERVER% start Dhcpserver
312		ping localhost -n 5 >NUL
313		sc \\%REMOTE_SERVER% query Dhcpserver
314		ping localhost -n 8 >NUL
315		sc \\%REMOTE_SERVER% start Dhcpserver
316
317		REM :: Check to make sure it's working
318		REM echo %CUR_DATE% %TIME% Verifying functionality on primary server...>> %LOGPATH%\%LOGFILE%.log
319		REM echo %CUR_DATE% %TIME% Verifying functionality on primary server...
320		REM sc \\%REMOTE_SERVER% query Dhcpserver \| find "RUNNING"
321		REM if not %ERRORLEVEL%==0 echo %CUR_DATE% %TIME% FAILURE DHCP server on %REMOTE_SERVER% is not running. You should investigate this manually.>> %LOGPATH%\%LOGFILE%.log
322		REM if %ERRORLEVEL%==0 echo %CUR_DATE% %TIME% SUCCESS DHCP server on %REMOTE_SERVER% is up and running. Recovery complete.>> %LOGPATH%\%LOGFILE%.log
323
324		:: Clean up
325		rmdir /S /Q %TEMP%\DHCP-RECOVERY
326
327		:: Done.
328		echo %CUR_DATE% %TIME% Exiting.>> %LOGPATH%\%LOGFILE%.log
329		echo %CUR_DATE% %TIME% Exiting.
330		goto EOF
331		)
332		)
333		ENDLOCAL
334
335		:: If the host responds to pings but the DHCP service isn't running, this executes
336		echo %CUR_DATE% %TIME% FAILURE %REMOTE_SERVER% is responding to pings, but DHCP isn't responding (yet?). Will try again in %FAILOVER_RECHECK_DELAY% seconds.>> %LOGPATH%\%LOGFILE%.log
337		echo %CUR_DATE% %TIME% FAILURE %REMOTE_SERVER% is responding to pings, but DHCP isn't responding (yet?). Will try again in %FAILOVER_RECHECK_DELAY% seconds.
338		ver >NUL
339		goto failover_loop
340
341		ENDLOCAL
342		echo.>> %LOGPATH%\%LOGFILE%.log
343		:EOF