I'm trying to follow [How To Share PHP Sessions on Multiple Memcached Servers](https://www.digitalocean.com/community/tutorials/how-to-share-php-sessions-on-multiple-memcached-servers-on-ubuntu-14-04) article and implement that to my environment:

`/etc/php.d/memcache.ini`:

```
# grep -v ^\; /etc/php.d/memcache.ini
extension=memcache.so
memcache.allow_failover=1
memcache.session_redundancy=2
session.save_handler=memcache
session.save_path='tcp://192.168.52.143:11211, tcp://192.168.52.142:11211'
# 

```

`phpinfo();`:

```
# php -i | grep -E 'memcache.allow_failover|memcache.session_redundancy|session.save_handler|session.save_path'
memcache.allow_failover => 1 => 1
memcache.session_redundancy => 2 => 2
session.save_handler => memcache => memcache
session.save_path => tcp://192.168.52.142:11211, tcp://192.168.52.143:11211 => tcp://192.168.52.142:11211, tcp://192.168.52.143:11211
# 

```

both systems are `RHEL6` and running `php-5.3.3`:

```
# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 6.6 (Santiago)
# rpm -q php php-pecl-memcache
php-5.3.3-40.el6_6.x86_64
php-pecl-memcache-3.0.5-4.el6.x86_64
# 

```

`TCP` wise: `.142` is able to get to `.143:11211`, and `.143` is able to get to `.142:11211`, `SELinux` is in `Permissive` mode.

I am able to see some chunks stored in one `memcached` server, but not in another.

What am I doing wrong?