Hello jbattist,
I'm not able to set the option in the SG300.
I've looked at RFC 4702 for the format of the client FQDN option but I don't understand how to setup this in the SG300.
RFC 4702 describe the format like below:
Code Len Flags RCODE1 RCODE2 Domain Name
+------+------+------+------+------+------+--
| 81 | n | | | | ...
+------+------+------+------+------+------+--
The format of the 1-octet Flags field is:
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
| MBZ |N|E|O|S|
+-+-+-+-+-+-+-+-+
For the ascii string should be:
- MBZ : 0000
- N: 0
- E: 1
- O: 1
- S: 1
- RCODE1: 255
- RCODE2: 255
ASCII : 0000 0111 255 255 (without the blanks)
Hex: 30 30 30 30 30 31 31 31 32 35 35 32 35 35 (without the blanks)
In the SG300 GUI I can set the hex value for the option and a description.
But if I check the DHCP from a client I don't see the option:
mac:~ me$ ipconfig getpacket en0
op = BOOTREPLY
htype = 1
flags = 0
hlen = 6
hops = 0
xid = 0x15f56166
secs = 0
ciaddr = 0.0.0.0
yiaddr = 192.168.110.10
siaddr = 0.0.0.0
giaddr = 0.0.0.0
chaddr = XX:XX:XX:XX:XX:XX
sname =
file =
options:
Options count is 11
dhcp_message_type (uint8): ACK 0x5
server_identifier (ip): 192.168.110.1
lease_time (uint32): 0x15180
renewal_t1_time_value (uint32): 0xa8c0
rebinding_t2_time_value (uint32): 0x12750
subnet_mask (ip): 255.255.255.0
router (ip_mult): {192.168.110.1}
domain_name_server (ip_mult): {192.168.100.2}
domain_name (string): homelab.local
nb_over_tcpip_node_type (uint8): 0x8
end (none):
mac:~ me$ ipconfig getoption en0 81
mac:~ me$
Do you have an idea or an example of the hex value for me?
Best regards,
Rainer.
