Here is snippet of smspxe.log:
Client lookup reply: <ClientIDReply><Identification Unknown="0" ItemKey="0" ServerName=""><Machine><ClientID/><NetbiosName/></Machine></Identification></ClientIDReply>
SMSPXE
8/28/2015 11:07:35 AM
3032 (0x0BD8)
00:21:70:C6:88:2B, 4C4C4544-005A-3110-8035-C4C04F524831: device is not in the database.
SMSPXE
8/28/2015 11:07:35 AM
3032 (0x0BD8)
Getting boot action for unknown machine: item key: 2046820352
SMSPXE
8/28/2015 11:07:35 AM
3032 (0x0BD8)
Client lookup reply: <ClientIDReply><Identification Unknown="0" ItemKey="0" ServerName=""><Machine><ClientID/><NetbiosName/></Machine></Identification></ClientIDReply>
SMSPXE
8/28/2015 11:07:37 AM
3036 (0x0BDC)
00:21:70:C6:88:2B, 4C4C4544-005A-3110-8035-C4C04F524831: device is not in the database.
SMSPXE
8/28/2015 11:07:37 AM
3036 (0x0BDC)
Getting boot action for unknown machine: item key: 2046820352
SMSPXE
8/28/2015 11:07:37 AM
3036 (0x0BDC)
Client lookup reply: <ClientIDReply><Identification Unknown="0" ItemKey="0" ServerName=""><Machine><ClientID/><NetbiosName/></Machine></Identification></ClientIDReply>
SMSPXE
8/28/2015 11:07:41 AM
3028 (0x0BD4)
00:21:70:C6:88:2B, 4C4C4544-005A-3110-8035-C4C04F524831: device is not in the database.
SMSPXE
8/28/2015 11:07:41 AM
3028 (0x0BD4)
Getting boot action for unknown machine: item key: 2046820352
SMSPXE
8/28/2015 11:07:41 AM
3028 (0x0BD4)
Client lookup reply: <ClientIDReply><Identification Unknown="0" ItemKey="0" ServerName=""><Machine><ClientID/><NetbiosName/></Machine></Identification></ClientIDReply>
SMSPXE
8/28/2015 11:07:49 AM
3040 (0x0BE0)
00:21:70:C6:88:2B, 4C4C4544-005A-3110-8035-C4C04F524831: device is not in the database.
SMSPXE
8/28/2015 11:07:49 AM
3040 (0x0BE0)
Getting boot action for unknown machine: item key: 2046820352
SMSPXE
8/28/2015 11:07:49 AM
3040 (0x0BE0)
Client boot action reply: <ClientIDReply><Identification Unknown="0" ItemKey="2046820352" ServerName=""><Machine><ClientID>2f5ddd6a-9a99-4c13-824d-78f3bddc8db2</ClientID><NetbiosName/></Machine></Identification><PXEBootAction
LastPXEAdvertisementID="" LastPXEAdvertisementTime="" OfferID="CM12001C" OfferIDTime="6/25/2015 10:07:00 AM" PkgID="CM10009B" PackageVersion="" PackagePath="http://sccm-houston.Advocacyinc.org/SMS_DP_SMSPKG$/CM10009D"
BootImageID="CM10009D" Mandatory="0"/></ClientIDReply>
SMSPXE
8/28/2015 11:08:17 AM
3032 (0x0BD8)
00:21:70:C6:88:2B, 4C4C4544-005A-3110-8035-C4C04F524831: found optional advertisement CM12001C
SMSPXE
8/28/2015 11:08:17 AM
3032 (0x0BD8)
Client boot action reply: <ClientIDReply><Identification Unknown="0" ItemKey="2046820352" ServerName=""><Machine><ClientID>2f5ddd6a-9a99-4c13-824d-78f3bddc8db2</ClientID><NetbiosName/></Machine></Identification><PXEBootAction
LastPXEAdvertisementID="" LastPXEAdvertisementTime="" OfferID="CM12001C" OfferIDTime="6/25/2015 10:07:00 AM" PkgID="CM10009B" PackageVersion="" PackagePath="http://sccm-houston.Advocacyinc.org/SMS_DP_SMSPKG$/CM10009D"
BootImageID="CM10009D" Mandatory="0"/></ClientIDReply>
SMSPXE
8/28/2015 11:08:19 AM
3036 (0x0BDC)
00:21:70:C6:88:2B, 4C4C4544-005A-3110-8035-C4C04F524831: found optional advertisement CM12001C
SMSPXE
8/28/2015 11:08:19 AM
3036 (0x0BDC)
Client boot action reply: <ClientIDReply><Identification Unknown="0" ItemKey="2046820352" ServerName=""><Machine><ClientID>2f5ddd6a-9a99-4c13-824d-78f3bddc8db2</ClientID><NetbiosName/></Machine></Identification><PXEBootAction
LastPXEAdvertisementID="" LastPXEAdvertisementTime="" OfferID="CM12001C" OfferIDTime="6/25/2015 10:07:00 AM" PkgID="CM10009B" PackageVersion="" PackagePath="http://sccm-houston.Advocacyinc.org/SMS_DP_SMSPKG$/CM10009D"
BootImageID="CM10009D" Mandatory="0"/></ClientIDReply>
SMSPXE
8/28/2015 11:08:23 AM
3028 (0x0BD4)
00:21:70:C6:88:2B, 4C4C4544-005A-3110-8035-C4C04F524831: found optional advertisement CM12001C
SMSPXE
8/28/2015 11:08:23 AM
3028 (0x0BD4)
Client boot action reply: <ClientIDReply><Identification Unknown="0" ItemKey="2046820352" ServerName=""><Machine><ClientID>2f5ddd6a-9a99-4c13-824d-78f3bddc8db2</ClientID><NetbiosName/></Machine></Identification><PXEBootAction
LastPXEAdvertisementID="" LastPXEAdvertisementTime="" OfferID="CM12001C" OfferIDTime="6/25/2015 10:07:00 AM" PkgID="CM10009B" PackageVersion="" PackagePath="http://sccm-houston.Advocacyinc.org/SMS_DP_SMSPKG$/CM10009D"
BootImageID="CM10009D" Mandatory="0"/></ClientIDReply>
SMSPXE
8/28/2015 11:08:31 AM
3040 (0x0BE0)
00:21:70:C6:88:2B, 4C4C4544-005A-3110-8035-C4C04F524831: found optional advertisement CM12001C
SMSPXE
8/28/2015 11:08:31 AM
3040 (0x0BE0)