Issue

• Searches for hosts against Red Hat Directory Server is slow if IP addresses are used instead of hostnames.

  # time ldapsearch -x -LLL '(&(objectClass=device)(cn=host))' -b "ou=Hosts,ou=host1,ou=nis,dc=analog,dc=com" -h host.example.com              dn: cn=host.example.com+ipHostNumber=xx.xxx.x.x,ou=Hosts,ou=example,ou=n
   is,dc=host,dc=com
  cn: host.example.com
  cn: host
  objectClass: device
  objectClass: ipHost
  objectClass: top
  ipHostNumber: XX.XXX.X.X
  
  dn: cn=host+ipHostNumber=XX.X.XXX.X,ou=Hosts,ou=host,ou=nis,dc=example,dc
   =com
  cn: host1
  cn: host1.example.com
  objectClass: device
  objectClass: ipHost
  objectClass: top
  ipHostNumber: XX.X.XXX.X
  
  0.000u 0.003s 0:00.00 0.0%      0+0k 0+0io 0pf+0w
  

However if add  ipHostNumber in the search filter instead of hostname, it takes an extremely long time to complete. Here it took 10 seconds, or sometimes upto 16
seconds too.

# time ldapsearch -x -LLL '(&(objectClass=device)(ipHostNumber=XX.X.XXX.X))' -b "ou=Hosts,ou=host1,ou=nis,dc=example,dc=com" -h host.example.com
dn: cn=host1.example.com+ipHostNumber=XX.XX.XXX.X,ou=Hosts,ou=host1,ou=n
 is,dc=example,dc=com
cn: host1.example.com
cn: host1
objectClass: device
objectClass: ipHost
objectClass: top
ipHostNumber: XX.X.XXX.X

dn: cn=host1+ipHostNumber=XX.X.XX.XXX,ou=Hosts,ou=host,ou=nis,dc=example,dc
 =com
cn: host1
cn: host1.example.com
objectClass: device
objectClass: ipHost
objectClass: top
ipHostNumber: XX.X.XXX.X

0.000u 0.003s 0:10.50 0.0%      0+0k 0+0io 0pf+0w