Hi! i configure a option 82 on a switch cisco 2960. A switch sending a packet with option 82
A format circuit-id is default : vlan-mod-port
A format remote-id is string
A dhcp received a packet in HEX but message is incorrect when we translate it in text.
So that we configure type remote-id like string that a message is correct.
But when circuit-id is default and in convertaion procces in text result is incorrect .
Can you help me with configure the circuit-id?
is the switch acting as DHCP Server ?
check below guide :
When dealing with options (43, 82) the hex conversion has to be done correctly and there are syntax around that. For option 43, the conversion tool at https://shimi.net/services/opt43/ works well, and takes out all the guesswork.
I'm not sure if there is a similar tool for option 82, but these two articles address option 82 hex and hex conversion.
debug ip dhcp server class
debug ip dhcp server packet detail
If this information helps or you find the solution, please update this thread.
0x010600040014020A020F010D6D617230312D617377312D7331 = D6D617230312D617377312D7331 - mar01-asw1-s1 = remote-id
01 - suboption
06 length 3 to 7
00 circut id type
04 length 5 to 7 octet
0014020A020F010 - vlan-mod-port = cirtcuit-id how to conver this hex message or how to configure that it will be to read.
For example on huawei switch a option 82 message is 0x01324769676162697445746865726E6574302F302F34363A36302E302074616730312D617377322D73312F302F302F302F302F30020648570248F990 to string 2GigabitEthernet0/0/46:60.0 tag01-asw2-s1/0/0/0/0/0HWH��
Our firewall FG does not support option82 because we have a special firmware from our security service however we have the same firewall FG but with huawei switch and option82 recived correctly. Sure it's may be for reason of unsupport option82 from Firewall FG...But i want to know whay it really from it.