How to reach interface alias bond0

I'm setting up an interface alias with my bond0 network. Why am I not able to ping/reach the second IP address, in this case 192.168.30.84? * However I can ping the address from another server:

-shellsession
    ~# ifconfig bond0
    bond0     Link encap:Ethernet  HWaddr 90:b1:1c:1e:eb:68  
              inet addr:192.168.30.82  Bcast:192.168.255.255  Mask:255.255.0.0
              inet6 addr: fe80::92b1:1cff:fe1e:eb68/64 Scope:Link
              UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
              RX packets:6924946 errors:0 dropped:2670931 overruns:0 frame:0
              TX packets:82824 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:921251441 (878.5 MiB)  TX bytes:6424239 (6.1 MiB)

    bond0:0   Link encap:Ethernet  HWaddr 90:b1:1c:1e:eb:68  
              inet addr:192.168.30.84  Bcast:192.168.255.255  Mask:255.255.0.0
              UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1

    ~# ip a
    1: lo:  mtu 16436 qdisc noop state DOWN
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    2: eth0:  mtu 1500 qdisc mq master bond0 state UP qlen 1000
        link/ether 90:b1:1c:1e:eb:68 brd ff:ff:ff:ff:ff:ff
    3: eth1:  mtu 1500 qdisc mq master bond0 state UP qlen 1000
        link/ether 90:b1:1c:1e:eb:68 brd ff:ff:ff:ff:ff:ff
    4: bond0:  mtu 1500 qdisc noqueue state UP
        link/ether 90:b1:1c:1e:eb:68 brd ff:ff:ff:ff:ff:ff
        inet 192.168.30.82/16 brd 192.168.255.255 scope global bond0
        inet 192.168.30.84/16 brd 192.168.255.255 scope global secondary bond0:0
        inet6 fe80::92b1:1cff:fe1e:eb68/64 scope link
           valid_lft forever preferred_lft forever

* Content of /etc/network/interfaces:

auto bond0                                                                                                       
                                                                                    
    iface bond0 inet static                                                         
        address 192.168.30.82                                                       
        netmask 255.255.0.0                                                         
        gateway 192.168.0.1                                                         
        slaves eth0 eth1                                                            
        bond_mode active-backup                                                     
        bond_miimon 100                                                             
        bond_downdelay 200                                                          
        bond_updelay 200                                                            
                                                                                    
    auto bond0:0                                                                    
    iface bond0:0 inet static                                                       
        address 192.168.30.84                                                       
        netmask 255.255.0.0