Host not pingable from solaris 11 local zone configured under same subnet .

Hi Experts ,
I am trying to setup the Solaris 11 Guest environment with a local zone in Virtual box . 

Local zone Installation  was successful with the below configuration .

brand: solaris
autoboot: false
bootargs:
file-mac-profile:
pool:
limitpriv:
scheduling-class:
ip-type: exclusive
hostid:
fs-allowed:
anet:
        linkname: net0
        lower-link: auto
        allowed-address not specified
        configure-allowed-address: true
        defrouter not specified
        allowed-dhcp-cids not specified
        link-protection: mac-nospoof
        mac-address: random
        auto-mac-address: 2:8:20:85:7e:e5
        mac-prefix not specified
        mac-slot not specified
        vlan-id not specified
        priority not specified
        rxrings not specified
        txrings not specified
        mtu not specified
        maxbw not specified
        rxfanout not specified

After booting the localzone , IP 192.168.56.21/24 is assigned to net0 interface . But now the problem comes here ... I am able to ping the global zone IP 192.168.56.20 in the same network but not the other IP 192.168.56.1 .