agent.circuit-id not logging for cisco 2960
Bryan_Coleman at dart.biz
Bryan_Coleman at dart.biz
Thu Oct 11 16:52:02 UTC 2007
Here is what I have:
fedora core 7, linux kernel 2.6
tried the version that came with fedora version 3.0.5 and unpacked and
built by hand and tried 3.0.6, both had the same results
in the dhcpd.conf file:
if exists agent.circuit-id {
log(info, concat("Lease for ", binary-to-ascii(10, 8, ".",
leased-address), " is connected to interface ",
binary-to-ascii(10, 8, "/", suffix(option
agent.circuit-id, 2)), " (add 1 to port number!), VLAN ",
binary-to-ascii(10, 16, "",
substring(option agent.circuit-id, 2, 2)), " on switch ",
binary-to-ascii(16, 8, ":",
substring(option agent.remote-id, 2, 6))));
log(info, concat("Lease for ", binary-to-ascii(10, 8, ".",
leased-address), " raw option-82 info is CID: ",
binary-to-ascii(10, 8, ".", option
agent.circuit-id), " AID: ",
binary-to-ascii(16, 8, ".", option
agent.remote-id)));
log(info, concat("Port ", binary-to-ascii(10, 8, "/", suffix(option
agent.circuit-id, 2))));
}
Here is the scenario:
I have two switches, both cisco switches. One is a 2950 and the other is
a 2960. I have two client devices, one on each switch. I am trying to
assign addresses based on switch/port layout. I have another system
running the dhcp server and is configured with the conf above of course
with other things defined as well. I can plug the server into either
switch and the client on the 2950 will work just fine. Meaning, I get the
log message and the server sends the correct response containing the
correct address. The client on the 2960 sends its request and the server
just logs "DHCPDISCOVER from <mac-addr> via eth0: network 10.1/16: no free
leases". I did a packet capture on the server system and the dhcp option
82 information is being added to the packet by the switch. However, the
server is not logging the message as containing a agent.circuit-id field.
It is like the server does not see the same packet. I also tried
switching clients, but that also did not work.
Please let me know if you need further information. All help will be
greatly appreciated.
Thanks,
Bryan
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