pgrounting extension in 11

Hi Team,

Anyone help me to solve the below issue not able to create the pgrouting
extension 11 version in rhel 6.9 OS,

[root(at)hkgrhepdbp001 ~]# yum install pgrouting_11
Loaded plugins: enabled_repos_upload, package_upload, product-id,
rhnplugin, search-disabled-repos, security, subscription-manager
This system is not registered with RHN Classic or RHN Satellite.
You can use rhn_register to register.
RHN Satellite or RHN Classic support will be disabled.
Setting up Install Process
rhel-6-server-rpms
| 2.0 kB
00:00
tnc_TNC_Nielsen_tnc_nielsen_rpms
| 2.1 kB
00:00
No package pgrouting_11 available.
Error: Nothing to do
Uploading Enabled Repositories Report
Loaded plugins: product-id, rhnplugin

==> ./psql -p 5434
psql (11.5)
Type "help" for help.

postgres=# create extension pgrouting;
ERROR: could not open extension control file
"/usr/pgsql-11/share/extension/pgrouting.control": No such file or directory
postgres=#
postgres=#

--
Thanks,
Prakash.R