Mac OSX DHCP debuging

Once in a while you might want to dig deep into OSX’s dhcp client and find out what dhcp packet the server sent it. A quick command to spit out this info:
# ipconfig getpacket en0
This produces the following output:

op = BOOTREPLY
htype = 1
dp_flags = 0
hlen = 6
hops = 0
xid = 1956115059
secs = 0
ciaddr = 0.0.0.0
yiaddr = 192.168.4.10
siaddr = 192.168.4.1
giaddr = 0.0.0.0
chaddr = 0:3:93:7a:d7:5c
sname = dhcp.mycompany.net
file =
options:
Options count is 10
dhcp_message_type (uint8): ACK 0x5
server_identifier (ip): 192.168.4.1
lease_time (uint32): 0x164a
subnet_mask (ip): 255.255.255.0
router (ip_mult): {192.168.4.1}
domain_name_server (ip_mult): {192.168.4.1}
domain_name (string): mycompany.net
end (none):

Many Ayromlou

, , , ,

2 responses to “Mac OSX DHCP debuging”

  2. Have you ever considered publishing an e-book or guest authoring on other sites?
    I have a blog based upon on the same subjects you discuss and would really like to have you share some stories/information.
    I know my audience would value your work.

    If you’re even remotely interested, feel free to send me an email.

Leave a Reply