ZyXEL Communications ES-4024A - Manual (Page 24)

ES-4024A Series Switch Support Notes
All contents copyright (c) 2006 ZyXEL Communications Corporation.
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After select the “DHCP Option”, it will pop up “Add DHCP Option Rule” dialog.
Select “option 82 Relay Agent Information”, sub-option 1, binary data. For port
25, VLAN 1, “GS-3012”, please key in “0019000147532d33303132” as the key
value and click OK. Please note that the first 2 bytes define port number, the
second 2 bytes is VLAN ID and the other bytes are the Option 82 string.