[Samba] XP Slow Downloading files

[Doug Curtis]

I have added a Samba 3 machine as a BDC and used the net rpc vampire command
to copy all of the users and machines.

For some reason, only Windows XP clients are slow when downloading files
from the Samba BDC.  NT and 2000 clients are fine.  When an XP client
uploads a file, it takes almost no time at all.

I've been searching but haven't found any answers.

Here is my smb.conf

[global]
        workgroup = GTREP
        server string = Migration Server
        passdb backend = ldapsam:ldap://chronicles.gtrep.gatech.edu
        username map = /etc/samba/smbusers
        log file = /var/samba/log/%m.log
        log level = 2
        add user script = /usr/local/sbin/smbldap-useradd -m '%u'
        delete user script = /usr/local/sbin/smbldap-userdel '%u'
        add group script = /usr/local/sbin/smbldap-groupadd -p '%g'
        delete group script = /usr/local/sbin/smbldap-groupdel '%g'
        add user to group script = /usr/local/sbin/smbldap-groupmod -m '%u'
'%g'
        delete user from group script = /usr/local/sbin/smbldap-groupmod -x
'%u' '%g'
        set primary group script = /usr/local/sbin/smbldap-usermod -g '%g'
'%u'
        add machine script = /usr/local/sbin/smbldap-useradd -w '%u'
        logon path =
        logon home =
        admin users= @"Domain Admins"
        domain logons = Yes
        os level = 64
        preferred master = Yes
        local master = Yes
        domain master = No
        ldap suffix = dc=gtrep,dc=gatech,dc=edu
        ldap machine suffix = ou=hosts
        ldap user suffix = ou=people
        ldap group suffix = ou=groups
        ldap idmap suffix = ou=Idmap
        ldap admin dn = cn=Manager,dc=gtrep,dc=gatech,dc=edu
        ldap ssl = start tls
        ldap delete dn = Yes
        idmap backend = ldap:ldap://chronicles.gtrep.gatech.edu
        socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=8192
SO_SNDBUF=8192
        name resolve order = wins lmhosts bcast
        wins server = 168.20.172.18

[netlogon]
        comment = Samba Network Logon Service
        path = /var/samba/netlogon
        write list = support

[homes]
        comment = Home Directories
        read only = No
        browseable = No

[printers]
        comment = All Printers
        path = /var/spool/samba
        printable = Yes
        browseable = No

[profiles]
        path = /home/profiles
        read only = No
        browseable = No

[IT Admin]
        comment = ITS Administrative Share
        path = /export/home2/IT_Admin
        valid users = @"Domain Admins"
        admin users = @"Domain Admins"
        force group = "Domain Admins"
        read only = No
        create mask = 0775
        directory mask = 0775