I have installed openldap on two machines and tried to setup multi-way replication.I am able to perform the multi-way replication (Add/Update/delete) when both the machines are up and ldap is running.

But when my one machine goes down(server2) and records are added,deleted,modified on (server1) are not getting replicated on server2 when its is up and ldap service is running.

**Below are the machine on which ldap is installed:**

    [root@localhost openldap]# cat /etc/*-release
    LSB_VERSION=base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
    Red Hat Enterprise Linux Server release 6.4 (Santiago)
    Red Hat Enterprise Linux Server release 6.4 (Santiago)


**Openldap version:**

    [root@localhost openldap]# slapd -V
    @(#) $OpenLDAP: slapd 2.4.23 (Oct 31 2012 08:14:14) $
            mockbuild@x86-022.build.eng.bos.redhat.com:/builddir/build/BUILD
            /openldap-2.4.23/openldap-2.4.23/build-servers/servers/slapd


**Below are the slapd.conf files from both the servers:**

 **1. Server1:**

    include         /etc/openldap/schema/corba.schema
    include         /etc/openldap/schema/core.schema
    include         /etc/openldap/schema/cosine.schema
    include         /etc/openldap/schema/duaconf.schema
    include         /etc/openldap/schema/dyngroup.schema
    include         /etc/openldap/schema/inetorgperson.schema
    include         /etc/openldap/schema/java.schema
    include         /etc/openldap/schema/misc.schema
    include         /etc/openldap/schema/nis.schema
    include         /etc/openldap/schema/openldap.schema
    include         /etc/openldap/schema/ppolicy.schema
    include         /etc/openldap/schema/collective.schema
    include         /etc/openldap/schema/sim-data-attributes.schema
    include         /etc/openldap/schema/eps-pdn-attributes.schema
    include         /etc/openldap/schema/SIMSubscription.schema
    include         /etc/openldap/schema/EPSSubscription.schema
    include         /etc/openldap/schema/PDNSubscriptionContexts.schema
    allow bind_v2
    pidfile         /var/run/openldap/slapd.pid
    argsfile        /var/run/openldap/slapd.args
    modulepath /usr/lib64/openldap
    moduleload syncprov.la
    serverID 1
    database config
    access to *
            by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
            by * none
    database monitor
    access to *
            by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" read
            by dn.exact="cn=Manager,dc=example,dc=com" read
            by * none

    database        bdb
    suffix          "dc=example,dc=com"
    checkpoint      1024 15
    rootdn          "cn=Manager,dc=example,dc=com"
    rootpw ******redacted******
    sizelimit       unlimited
    directory       /var/lib/ldap

    index objectClass                       eq,pres
    index ou,cn,mail,surname,givenname      eq,pres,sub
    index uidNumber,gidNumber,loginShell    eq,pres
    index uid,memberUid                     eq,pres,sub
    index nisMapName,nisMapEntry            eq,pres,sub
    overlay syncprov
    syncprov-checkpoint 100 10
    syncprov-sessionlog 100

    syncrepl rid=100
             provider=ldap://172.16.101.60:389
             type=refreshAndPersist
             retry="60 +"
             searchbase="dc=example,dc=com"
             scope=sub
             schemachecking=on
             bindmethod=simple
             binddn="cn=Manager,dc=example,dc=com"
             credentials=secret
    mirrormode on

    loglevel 16777
    
    logfile   /var/log/ldap.log

 **2. Server2:**

    [root@localhost openldap]# cat slapd.conf
    include         /etc/openldap/schema/corba.schema
    include         /etc/openldap/schema/core.schema
    include         /etc/openldap/schema/cosine.schema
    include         /etc/openldap/schema/duaconf.schema
    include         /etc/openldap/schema/dyngroup.schema
    include         /etc/openldap/schema/inetorgperson.schema
    include         /etc/openldap/schema/java.schema
    include         /etc/openldap/schema/misc.schema
    include         /etc/openldap/schema/nis.schema
    include         /etc/openldap/schema/openldap.schema
    include         /etc/openldap/schema/ppolicy.schema
    include         /etc/openldap/schema/collective.schema
    include         /etc/openldap/schema/sim-data-attributes.schema
    include         /etc/openldap/schema/eps-pdn-attributes.schema
    include         /etc/openldap/schema/SIMSubscription.schema
    include         /etc/openldap/schema/EPSSubscription.schema
    include         /etc/openldap/schema/PDNSubscriptionContexts.schema
    allow bind_v2
    pidfile         /var/run/openldap/slapd.pid
    argsfile        /var/run/openldap/slapd.args
    modulepath /usr/lib64/openldap
    moduleload syncprov.la
    serverID 2
    database config
    access to *
            by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
            by * none
    
    database monitor
    access to *
            by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" read
            by dn.exact="cn=Manager,dc=example,dc=com" read
            by * none
    
    
    database        bdb
    suffix          "dc=example,dc=com"
    checkpoint      1024 15
    rootdn          "cn=Manager,dc=example,dc=com"
    rootpw *****redacted*****
    sizelimit       unlimited
    directory       /var/lib/ldap
    index objectClass                       eq,pres
    index ou,cn,mail,surname,givenname      eq,pres,sub
    index uidNumber,gidNumber,loginShell    eq,pres
    index uid,memberUid                     eq,pres,sub
    index nisMapName,nisMapEntry            eq,pres,sub
    
    overlay syncprov
    syncprov-checkpoint 100 10
    syncprov-sessionlog 100
    
    syncrepl rid=100
             provider=ldap://172.16.101.36:389
             type=refreshAndPersist
             retry="60 +"
             searchbase="dc=example,dc=com"
             scope=sub
             schemachecking=on
             bindmethod=simple
             binddn="cn=Manager,dc=example,dc=com"
             credentials=secret
    mirrormode on
    
    loglevel 393
    
    logfile   /var/log/ldap.log


**On both the nodes the Syn log are enabled:**


	# Logging
	#  - trace function calls (1)
	#  - connection management (8)
	#  - ACL processing (128)
	#  - stats log connections/operations/results (256)
	#  - LDAPSync replication (16384)
	#  (1 + 8 + 128 + 256+ 16384)=16777
	loglevel 16777
	logfile   /var/log/ldap.log

**Below are the logs from both the servers**

**Server2:**

	Apr 30 00:39:29 localhost slapd[5891]: daemon: removing 15
	Apr 30 00:39:29 localhost slapd[5891]: conn=1001 fd=15 closed (slapd shutdown)
	Apr 30 00:39:29 localhost slapd[5891]: slapd shutdown: waiting for 0 operations/tasks to finish
	Apr 30 00:39:29 localhost slapd[5891]: slapd shutdown: initiated
	Apr 30 00:39:29 localhost slapd[5891]: ====> bdb_cache_release_all
	Apr 30 00:39:29 localhost slapd[5891]: slapd destroy: freeing system resources.
	Apr 30 00:39:29 localhost slapd[5891]: syncinfo_free: rid=100
	Apr 30 00:39:29 localhost slapd[5891]: connection_get(13): got connid=0
	Apr 30 00:39:29 localhost slapd[5891]: daemon: removing 13r
	Apr 30 00:39:29 localhost slapd[5891]: slapd stopped.


**Server1:Trying to conncet to Server2 but since its stopped so failed**

	Apr 29 19:10:27 localhost slapd[28124]: =>do_syncrepl rid=100
	Apr 29 19:10:27 localhost slapd[28124]: slap_client_connect: URI=ldap://172.16.101.60:389 DN="cn=manager,dc=example,dc=com" ldap_sasl_bind_s failed (-1)
	Apr 29 19:10:27 localhost slapd[28124]: do_syncrepl: rid=100 rc -1 retrying
	Apr 29 19:10:27 localhost slapd[28124]: daemon: activity on 1 descriptor
	Apr 29 19:10:27 localhost slapd[28124]: daemon: activity on:


**Server1:Adding new entry**


	Apr 29 19:12:11 localhost slapd[28124]: op tag 0x68, time 1430314931
	Apr 29 19:12:11 localhost slapd[28124]: conn=1001 op=15 do_add
	Apr 29 19:12:11 localhost slapd[28124]: => get_ctrls
	Apr 29 19:12:11 localhost slapd[28124]: => get_ctrls: oid="2.16.840.1.113730.3.4.2" (noncritical)
	Apr 29 19:12:11 localhost slapd[28124]: <= get_ctrls: n=1 rc=0 err=""
	Apr 29 19:12:11 localhost slapd[28124]: >>> dnPrettyNormal: <IMSI=123,dc=example,dc=com>
	Apr 29 19:12:11 localhost slapd[28124]: <<< dnPrettyNormal: <IMSI=123,dc=example,dc=com>, <IMSI=123,dc=example,dc=com>
	Apr 29 19:12:11 localhost slapd[28124]: conn=1001 op=15 ADD dn="IMSI=123,dc=example,dc=com"
	Apr 29 19:12:11 localhost slapd[28124]: oc_check_required entry (IMSI=123,dc=example,dc=com), objectClass "SIMSubscription"
	Apr 29 19:12:11 localhost slapd[28124]: oc_check_allowed type "IMSI"
	Apr 29 19:12:11 localhost slapd[28124]: oc_check_allowed type "objectClass"
	Apr 29 19:12:11 localhost slapd[28124]: oc_check_allowed type "structuralObjectClass"
	Apr 29 19:12:11 localhost slapd[28124]: slap_queue_csn: queing 0x7fc1c7ffe030 20150429134211.927786Z#000000#001#000000
	Apr 29 19:12:11 localhost slapd[28124]: bdb_dn2entry("IMSI=123,dc=example,dc=com")
	Apr 29 19:12:11 localhost slapd[28124]: => bdb_dn2id("IMSI=123,dc=example,dc=com")
	Apr 29 19:12:11 localhost slapd[28124]: <= bdb_dn2id: get failed: DB_NOTFOUND: No matching key/data pair found (-30988)
	Apr 29 19:12:11 localhost slapd[28124]: => access_allowed: add access to "dc=example,dc=com" "children" requested
	Apr 29 19:12:11 localhost slapd[28124]: <= root access granted
	Apr 29 19:12:11 localhost slapd[28124]: => access_allowed: add access granted by manage(=mwrscxd)
	Apr 29 19:12:11 localhost slapd[28124]: => access_allowed: add access to "IMSI=123,dc=example,dc=com" "entry" requested
	Apr 29 19:12:11 localhost slapd[28124]: <= root access granted
	Apr 29 19:12:11 localhost slapd[28124]: => access_allowed: add access granted by manage(=mwrscxd)
	Apr 29 19:12:11 localhost slapd[28124]: => bdb_dn2id_add 0x5a: "IMSI=123,dc=example,dc=com"
	Apr 29 19:12:11 localhost slapd[28124]: <= bdb_dn2id_add 0x5a: 0
	Apr 29 19:12:11 localhost slapd[28124]: => index_entry_add( 90, "IMSI=123,dc=example,dc=com" )
	Apr 29 19:12:11 localhost slapd[28124]: => key_change(ADD,5a)
	Apr 29 19:12:11 localhost slapd[28124]: <= key_change 0
	Apr 29 19:12:11 localhost slapd[28124]: => key_change(ADD,5a)
	Apr 29 19:12:11 localhost slapd[28124]: <= key_change 0
	Apr 29 19:12:11 localhost slapd[28124]: => key_change(ADD,5a)
	Apr 29 19:12:11 localhost slapd[28124]: <= key_change 0
	Apr 29 19:12:11 localhost slapd[28124]: <= index_entry_add( 90, "IMSI=123,dc=example,dc=com" ) success
	Apr 29 19:12:11 localhost slapd[28124]: daemon: activity on 1 descriptor
	Apr 29 19:12:11 localhost slapd[28124]: daemon: activity on:
	Apr 29 19:12:11 localhost slapd[28124]:
	Apr 29 19:12:11 localhost slapd[28124]: daemon: epoll: listen=7 active_threads=0 tvp=zero
	Apr 29 19:12:11 localhost slapd[28124]: daemon: epoll: listen=8 active_threads=0 tvp=zero
	Apr 29 19:12:11 localhost slapd[28124]: daemon: epoll: listen=9 active_threads=0 tvp=zero
	Apr 29 19:12:11 localhost slapd[28124]: => entry_encode(0x0000005a): IMSI=123,dc=example,dc=com
	Apr 29 19:12:11 localhost slapd[28124]: <= entry_encode(0x0000005a): IMSI=123,dc=example,dc=com


**Server1:After starting the server 2 Server 1 was able to communicate with server2**


	Apr 29 19:12:52 localhost slapd[28124]: daemon: added 14r (active) listener=(nil)
	Apr 29 19:12:52 localhost slapd[28124]: conn=1002 fd=14 ACCEPT from IP=172.16.101.60:42695 (IP=0.0.0.0:389)
	Apr 29 19:12:52 localhost slapd[28124]: daemon: activity on 2 descriptors
	Apr 29 19:12:52 localhost slapd[28124]: daemon: activity on:
	Apr 29 19:12:52 localhost slapd[28124]:  14r
	Apr 29 19:12:52 localhost slapd[28124]:
	Apr 29 19:12:52 localhost slapd[28124]: daemon: read active on 14
	Apr 29 19:12:52 localhost slapd[28124]: daemon: epoll: listen=7 active_threads=0 tvp=zero
	Apr 29 19:12:52 localhost slapd[28124]: daemon: epoll: listen=8 active_threads=0 tvp=zero
	Apr 29 19:12:52 localhost slapd[28124]: daemon: epoll: listen=9 active_threads=0 tvp=zero
	Apr 29 19:12:52 localhost slapd[28124]: connection_get(14): got connid=1002
	Apr 29 19:12:52 localhost slapd[28124]: connection_read(14): checking for input on id=1002
	Apr 29 19:12:52 localhost slapd[28124]: op tag 0x60, time 1430314972
	Apr 29 19:12:52 localhost slapd[28124]: conn=1002 op=0 do_bind
	Apr 29 19:12:52 localhost slapd[28124]: >>> dnPrettyNormal: <cn=manager,dc=example,dc=com>
	Apr 29 19:12:52 localhost slapd[28124]: <<< dnPrettyNormal: <cn=manager,dc=example,dc=com>, <cn=manager,dc=example,dc=com>
	Apr 29 19:12:52 localhost slapd[28124]: conn=1002 op=0 BIND dn="cn=manager,dc=example,dc=com" method=128
	Apr 29 19:12:52 localhost slapd[28124]: do_bind: version=3 dn="cn=manager,dc=example,dc=com" method=128
	Apr 29 19:12:52 localhost slapd[28124]: conn=1002 op=0 BIND dn="cn=manager,dc=example,dc=com" mech=SIMPLE ssf=0
	Apr 29 19:12:52 localhost slapd[28124]: do_bind: v3 bind: "cn=manager,dc=example,dc=com" to "cn=manager,dc=example,dc=com"
	Apr 29 19:12:52 localhost slapd[28124]: send_ldap_result: conn=1002 op=0 p=3
	Apr 29 19:12:52 localhost slapd[28124]: send_ldap_response: msgid=1 tag=97 err=0
	Apr 29 19:12:52 localhost slapd[28124]: conn=1002 op=0 RESULT tag=97 err=0 text=
	Apr 29 19:12:52 localhost slapd[28124]: daemon: activity on 2 descriptors
	Apr 29 19:12:52 localhost slapd[28124]: daemon: activity on:
	Apr 29 19:12:52 localhost slapd[28124]:  14r
	Apr 29 19:12:52 localhost slapd[28124]:
	Apr 29 19:12:52 localhost slapd[28124]: daemon: read active on 14
	Apr 29 19:12:52 localhost slapd[28124]: daemon: epoll: listen=7 active_threads=0 tvp=zero
	Apr 29 19:12:52 localhost slapd[28124]: daemon: epoll: listen=8 active_threads=0 tvp=zero
	Apr 29 19:12:52 localhost slapd[28124]: daemon: epoll: listen=9 active_threads=0 tvp=zero
	Apr 29 19:12:52 localhost slapd[28124]: connection_get(14): got connid=1002
	Apr 29 19:12:52 localhost slapd[28124]: connection_read(14): checking for input on id=1002
	Apr 29 19:12:52 localhost slapd[28124]: op tag 0x63, time 1430314972
	Apr 29 19:12:52 localhost slapd[28124]: conn=1002 op=1 do_search
	Apr 29 19:12:52 localhost slapd[28124]: >>> dnPrettyNormal: <dc=example,dc=com>
	Apr 29 19:12:52 localhost slapd[28124]: <<< dnPrettyNormal: <dc=example,dc=com>, <dc=example,dc=com>
	Apr 29 19:12:52 localhost slapd[28124]: => get_ctrls
	Apr 29 19:12:52 localhost slapd[28124]: => get_ctrls: oid="1.3.6.1.4.1.4203.1.9.1.1" (noncritical)
	Apr 29 19:12:52 localhost slapd[28124]: => get_ctrls: oid="2.16.840.1.113730.3.4.2" (critical)
	Apr 29 19:12:52 localhost slapd[28124]: <= get_ctrls: n=2 rc=0 err=""


**Server2:After server 2 was started it was also able to communicate with server1 but the replication did not happened**

	Apr 30 00:43:30 localhost slapd[6070]: >>> slap_listener(ldap:///)
	Apr 30 00:43:30 localhost slapd[6070]: daemon: listen=7, new connection on 14
	Apr 30 00:43:30 localhost slapd[6070]: daemon: added 14r (active) listener=(nil)
	Apr 30 00:43:30 localhost slapd[6070]: conn=1000 fd=14 ACCEPT from IP=172.16.101.36:46102 (IP=0.0.0.0:389)
	Apr 30 00:43:30 localhost slapd[6070]: daemon: activity on 2 descriptors
	Apr 30 00:43:30 localhost slapd[6070]: daemon: activity on:
	Apr 30 00:43:30 localhost slapd[6070]:  14r
	Apr 30 00:43:30 localhost slapd[6070]:
	Apr 30 00:43:30 localhost slapd[6070]: daemon: read active on 14
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=7 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=8 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=9 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: connection_get(14): got connid=1000
	Apr 30 00:43:30 localhost slapd[6070]: connection_read(14): checking for input on id=1000
	Apr 30 00:43:30 localhost slapd[6070]: op tag 0x60, time 1430334810
	Apr 30 00:43:30 localhost slapd[6070]: conn=1000 op=0 do_bind
	Apr 30 00:43:30 localhost slapd[6070]: >>> dnPrettyNormal: <cn=manager,dc=example,dc=com>
	Apr 30 00:43:30 localhost slapd[6070]: <<< dnPrettyNormal: <cn=manager,dc=example,dc=com>, <cn=manager,dc=example,dc=com>
	Apr 30 00:43:30 localhost slapd[6070]: conn=1000 op=0 BIND dn="cn=manager,dc=example,dc=com" method=128
	Apr 30 00:43:30 localhost slapd[6070]: do_bind: version=3 dn="cn=manager,dc=example,dc=com" method=128
	Apr 30 00:43:30 localhost slapd[6070]: conn=1000 op=0 BIND dn="cn=manager,dc=example,dc=com" mech=SIMPLE ssf=0
	Apr 30 00:43:30 localhost slapd[6070]: do_bind: v3 bind: "cn=manager,dc=example,dc=com" to "cn=manager,dc=example,dc=com"
	Apr 30 00:43:30 localhost slapd[6070]: send_ldap_result: conn=1000 op=0 p=3
	Apr 30 00:43:30 localhost slapd[6070]: send_ldap_response: msgid=1 tag=97 err=0
	Apr 30 00:43:30 localhost slapd[6070]: conn=1000 op=0 RESULT tag=97 err=0 text=
	Apr 30 00:43:30 localhost slapd[6070]: daemon: activity on 1 descriptor
	Apr 30 00:43:30 localhost slapd[6070]: daemon: activity on:
	Apr 30 00:43:30 localhost slapd[6070]:
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=7 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=8 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=9 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: daemon: activity on 1 descriptor
	Apr 30 00:43:30 localhost slapd[6070]: daemon: activity on:
	Apr 30 00:43:30 localhost slapd[6070]:  14r
	Apr 30 00:43:30 localhost slapd[6070]:
	Apr 30 00:43:30 localhost slapd[6070]: daemon: read active on 14
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=7 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=8 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: daemon: epoll: listen=9 active_threads=0 tvp=zero
	Apr 30 00:43:30 localhost slapd[6070]: connection_get(14): got connid=1000
	Apr 30 00:43:30 localhost slapd[6070]: connection_read(14): checking for input on id=1000
	Apr 30 00:43:30 localhost slapd[6070]: op tag 0x63, time 1430334810
	Apr 30 00:43:30 localhost slapd[6070]: conn=1000 op=1 do_search