add an etherstub to the config

global zone info

[root@00-0c-29-63-79-54 ~]# dladm show-etherstub
LINK
switch0
[root@00-0c-29-63-79-54 ~]# dladm show-vnic
LINK         OVER       SPEED MACADDRESS        MACADDRTYPE VID  ZONE
net0         e1000g0    0     b2:f5:cd:46:e0:59 fixed       0    9a301cc2-8666-4500-a787-b379b6861d8c
net1         switch0    0     b2:f5:cd:46:de:e1 fixed       0    9a301cc2-8666-4500-a787-b379b6861d8c
net0         e1000g0    0     b2:f5:cf:e4:c:f9  fixed       0    822bc844-bc95-4238-acca-a86d1532b7db
net1         switch0    0     b2:f5:cf:e4:d:b0  fixed       0    822bc844-bc95-4238-acca-a86d1532b7db
[root@00-0c-29-63-79-54 ~]# vmadm list
UUID                                  TYPE  RAM      STATE             ALIAS
822bc844-bc95-4238-acca-a86d1532b7db  OS    256      running           zone2
9a301cc2-8666-4500-a787-b379b6861d8c  OS    256      running           zone1

ping

Zone1 -> Zone2
[root@9a301cc2-8666-4500-a787-b379b6861d8c ~]# ping 192.168.1.242
192.168.1.242 is alive
[root@9a301cc2-8666-4500-a787-b379b6861d8c ~]# ping 10.0.1.2
10.0.1.2 is alive


Zone2 -> Zone1
[root@822bc844-bc95-4238-acca-a86d1532b7db ~]# ping 192.168.1.241
192.168.1.241 is alive
[root@822bc844-bc95-4238-acca-a86d1532b7db ~]# ping 10.0.1.1
10.0.1.1 is alive

usbkey-config

...
etherstub="switch0"

zone1.json

{
  "alias": "zone1",
  "brand": "joyent",
  "dataset_uuid": "a93fda38-80aa-11e1-b8c1-8b1f33cd9007",
  "nics": [
    {
      "nic_tag": "admin",
      "ip": "192.168.1.241",
      "netmask": "255.255.255.0",
      "gateway": "192.168.1.1"
    },
    {
      "nic_tag": "switch0",
      "ip": "10.0.1.1",
      "netmask": "255.255.0.0"
    }
  ]
}

zone2.json

{
  "alias": "zone2",
  "brand": "joyent",
  "dataset_uuid": "a93fda38-80aa-11e1-b8c1-8b1f33cd9007",
  "nics": [
    {
      "nic_tag": "admin",
      "ip": "192.168.1.242",
      "netmask": "255.255.255.0",
      "gateway": "192.168.1.1"
    },
    {
      "nic_tag": "switch0",
      "ip": "10.0.1.2",
      "netmask": "255.255.0.0"
    }
  ]
}