How to enable the repo on RHEL 7?

Error:

root@localhost /]# yum install perl
Loaded plugins: product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
There are no enabled repos.
 Run "yum repolist all" to see the repos you have.
 You can enable repos with yum-config-manager --enable
[root@localhost /]# yum repolist all
Loaded plugins: product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
repo id                                                     repo name                                                 status
rhel7                                                       rhel7                                                     disabled
repolist: 0

step 1) Installed yum-util packages

root@localhost Packages]# rpm -ivh python-chardet-2.0.1-7.el7.noarch.rpm
warning: python-chardet-2.0.1-7.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY
Preparing...                          ################################# [100%]
Updating / installing...
   1:python-chardet-2.0.1-7.el7       ################################# [100%]
[root@localhost Packages]# rpm -ivh python-kitchen-1.1.1-5.el7.noarch.rpm
warning: python-kitchen-1.1.1-5.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY
Preparing...                          ################################# [100%]
Updating / installing...
   1:python-kitchen-1.1.1-5.el7       ################################# [100%]
[root@localhost Packages]# rpm -ivh python-chardet-2.0.1-7.el7.noarch.rpm
warning: python-chardet-2.0.1-7.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY
Preparing...                          ################################# [100%]
        package python-chardet-2.0.1-7.el7.noarch is already installed
[root@localhost Packages]# rpm -ivh yum-utils-1.1.31-24.el7.noarch.rpm
warning: yum-utils-1.1.31-24.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY
Preparing...                          ################################# [100%]
Updating / installing...
   1:yum-utils-1.1.31-24.el7          ################################# [100%]

step 2) Enabled the repo through yum-config-manager

[root@localhost Packages]# yum-config-manager --enable rhel7
Loaded plugins: product-id
======================================================== repo: rhel7 =========================================================
[rhel7]
async = True
bandwidth = 0
base_persistdir = /var/lib/yum/repos/x86_64/7Server
baseurl = file:///Packages/
cache = 0
cachedir = /var/cache/yum/x86_64/7Server/rhel7
check_config_file_age = True
cost = 1000
deltarpm_metadata_percentage = 100
deltarpm_percentage =
enabled = 1
enablegroups = True
exclude =
failovermethod = priority
gpgcadir = /var/lib/yum/repos/x86_64/7Server/rhel7/gpgcadir
gpgcakey =
gpgcheck = True
gpgdir = /var/lib/yum/repos/x86_64/7Server/rhel7/gpgdir
gpgkey =
hdrdir = /var/cache/yum/x86_64/7Server/rhel7/headers
http_caching = all
includepkgs =
ip_resolve =
keepalive = True
keepcache = False
mddownloadpolicy = sqlite
mdpolicy = group:small
mediaid =
metadata_expire = 21600
metadata_expire_filter = read-only:present
metalink =
minrate = 0
mirrorlist =
mirrorlist_expire = 86400
name = rhel7
old_base_cache_dir =
password =
persistdir = /var/lib/yum/repos/x86_64/7Server/rhel7
pkgdir = /var/cache/yum/x86_64/7Server/rhel7/packages
proxy = False
proxy_dict =
proxy_password =
proxy_username =
repo_gpgcheck = False
retries = 10
skip_if_unavailable = False
ssl_check_cert_permissions = True
sslcacert =
sslclientcert =
sslclientkey =
sslverify = True
throttle = 0
timeout = 30.0
ui_id = rhel7
ui_repoid_vars = releasever,
   basearch
username =

[root@localhost Packages]# yum repolist all
Loaded plugins: product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
rhel7                                                                                                  | 2.9 kB  00:00:00
rhel7/primary_db                                                                                       | 3.4 MB  00:00:00
repo id                                                  repo name                                              status
rhel7                                                    rhel7                                                  enabled: 4,305
repolist: 4,305
[root@localhost Packages]#