***** ur log output *****

++ SYSINFO_Bootparam_aggr0_aggr='"ec:f4:bb:d7:20:a8,ec:f4:bb'  <---- Truncated second MAC Address

***** cat /tmp/.sysinfo.json *****

  "Network Interfaces": {
    "igb0": {"MAC Address": "ec:f4:bb:d7:20:ac", "ip4addr": "x.x.x.x", "Link Status": "up", "NIC Names": ["admin"]},
    "igb1": {"MAC Address": "ec:f4:bb:d7:20:ad", "ip4addr": "", "Link Status": "down", "NIC Names": []},
    "ixgbe0": {"MAC Address": "ec:f4:bb:d7:20:a8", "ip4addr": "", "Link Status": "up", "NIC Names": []},
    "ixgbe1": {"MAC Address": "ec:f4:bb:d7:20:aa", "ip4addr": "", "Link Status": "up", "NIC Names": []}
  },
  "Virtual Network Interfaces": {
  },
  "Link Aggregations": {
  }
}

***** nictagadm list *****

NAME           MACADDRESS         LINK
webservices_c04 -                  aggr0
proclaim_c04   -                  aggr0
operations_c04 -                  aggr0
marketing_c04  -                  aggr0
faithlife_c04  -                  aggr0
documents_c04  -                  aggr0
digitallibrary_c04 -                  aggr0
core_c04       -                  aggr0
commerce_c04   -                  aggr0
analytics_c04  -                  aggr0
amber_c04      -                  aggr0
admin          ec:f4:bb:d7:20:ac  igb0

***** dladm show-aggr returns nothing *****
[root@ec-f4-bb-d7-20-ac (Telx) ~]# dladm show-aggr
[root@ec-f4-bb-d7-20-ac (Telx) ~]#

***** sdc-napi /aggregations *****

  {
    "belongs_to_uuid": "44454c4c-3800-1054-8052-c2c04f423432",
    "id": "44454c4c-3800-1054-8052-c2c04f423432-aggr0",
    "lacp_mode": "active",
    "name": "aggr0",
    "macs": [
      "ec:f4:bb:d7:20:a8",
      "ec:f4:bb:d7:20:aa"
    ],
    "nic_tags_provided": [
      "amber_c04",
      "analytics_c04",
      "commerce_c04",
      "core_c04",
      "digitallibrary_c04",
      "documents_c04",
      "faithlife_c04",
      "marketing_c04",
      "operations_c04",
      "proclaim_c04",
      "webservices_c04"
    ]
  },

***** sdc-cnapi /servers/44454c4c-3800-1054-8052-c2c04f423432 *****

"Boot Parameters": {
      "hostname": "ec-f4-bb-d7-20-ac",
      "rabbitmq": "guest:guest:x.x.x.x:5672",
      "rabbitmq_dns": "guest:guest:rabbitmq.x.x.x:5672",
      "admin_nic": "ec:f4:bb:d7:20:ac",
      "aggr0_aggr": "ec:f4:bb:d7:20:a8,ec:f4:bb:d7:20:aa",
      "aggr0_lacp_mode": "active",
      "console": "ttyb"
    },

...

      "ixgbe0": {
        "MAC Address": "ec:f4:bb:d7:20:a8",
        "ip4addr": "",
        "Link Status": "up",
        "NIC Names": []
      },
      "ixgbe1": {
        "MAC Address": "ec:f4:bb:d7:20:aa",
        "ip4addr": "",
        "Link Status": "up",
        "NIC Names": []
      },
      "aggr0": {
        "MAC Address": "ec:f4:bb:d7:20:a8",
        "ip4addr": "",
        "Link Status": "up",
        "NIC Names": []
      }
    },
    "Virtual Network Interfaces": {},
    "Link Aggregations": {
      "aggr0": {
        "LACP mode": "active",
        "Interfaces": [
          "ixgbe0",
          "ixgbe1"
        ]
      }
    }

***** svcs in maintenance or offline mode after reboot because of truncated mac address perhaps? *****

offline        21:47:12 svc:/system/zones:default
offline        21:47:12 svc:/system/smartdc/init:default
offline        21:47:12 svc:/system/smartdc/vmadmd:default
maintenance    21:47:52 svc:/smartdc/agent/hagfish-watcher:default
maintenance    21:47:52 svc:/smartdc/agent/provisioner:default
maintenance    21:47:53 svc:/system/smartdc/metadata:default
maintenance    21:47:53 svc:/smartdc/agent/amon-relay:default
maintenance    21:47:53 svc:/smartdc/agent/ur:default
maintenance    21:47:54 svc:/smartdc/agent/firewaller:default
maintenance    21:48:03 svc:/smartdc/agent/heartbeater:default