its e1000g1
here is the logs
bash-3.2# grep e1000g1 /var/adm/messages*
/var/adm/messages:Jul 25 19:19:01 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 25 19:19:35 solaris-server mac: [ID 736570 kern.info] NOTICE: e1000g1 unregistered
/var/adm/messages:Jul 25 19:29:44 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 25 19:44:54 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 04:09:53 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 04:10:03 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 04:10:16 solaris-server in.routed[503]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 26 14:03:47 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 14:03:58 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 14:04:11 solaris-server in.routed[515]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 26 14:12:47 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 14:12:59 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 14:13:09 solaris-server in.routed[480]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 26 14:27:49 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 14:28:00 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 14:28:11 solaris-server in.routed[524]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 26 14:47:49 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 14:48:00 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 14:59:16 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 14:59:27 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 15:09:31 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 15:09:42 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 15:43:49 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 15:43:59 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 16:12:44 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 16:12:55 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 26 16:13:07 solaris-server in.routed[500]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 26 16:23:43 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 26 16:23:55 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 28 18:24:08 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 28 18:24:19 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 28 18:24:32 solaris-server in.routed[490]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 28 18:34:09 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 28 18:34:19 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 28 18:34:32 solaris-server in.routed[516]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 28 18:47:33 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 28 18:47:43 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 28 18:47:55 solaris-server in.routed[502]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 28 18:59:42 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 28 18:59:51 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 28 19:00:04 solaris-server in.routed[529]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 28 19:07:39 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 28 19:07:49 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 29 02:38:54 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 29 02:39:08 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 29 02:39:17 solaris-server in.routed[507]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 29 02:49:08 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 29 02:49:18 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 29 06:30:27 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 29 06:30:37 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 29 20:18:28 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 29 20:18:38 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
/var/adm/messages:Jul 29 20:18:50 solaris-server in.routed[506]: [ID 749644 daemon.notice] e1000g1 has a bad address 0.0.0.0
/var/adm/messages:Jul 29 20:29:17 solaris-server /sbin/dhcpagent[156]: [ID 778557 daemon.warning] configure_v4_lease: no IP broadcast specified for e1000g1, making best guess
/var/adm/messages:Jul 29 20:29:18 solaris-server in.routed[506]: [ID 238047 daemon.warning] interface e1000g1 to 192.168.1.112 turned off
/var/adm/messages:Jul 30 03:29:39 solaris-server mac: [ID 469746 kern.info] NOTICE: e1000g1 registered
/var/adm/messages:Jul 30 03:29:51 solaris-server mac: [ID 435574 kern.info] NOTICE: e1000g1 link up, 1000 Mbps, full duplex
--
if found that the nic is trying go work like IPv6 " inet6 ::1/128