OpenForum RSS: isc-dhcpd option 82

isc-dhcpd option 82 (��)

Sun, 10 Feb 2013 11:29:58 GMT

�� ip �� hardware ethernet � �� :

Lease for 10.1.255.2 Swith port: 0.1.0.5 Switch MAC: 64:70:2:91:44:f Switch IP: 0.0.0.0 VLAN: 5 MAC on the port: b8:a3:86:14:1d:c3

�� conf �� , �� !

isc-dhcpd option 82 (��)

Sun, 10 Feb 2013 09:15:52 GMT

�� , �� option 82
�� 5, �� :
if exists agent.circuit-id
{
log (
info, concat( " Lease for ", binary-to-ascii (10, 8, ".", leased-address),
" Swith port: ",
binary-to-ascii (10, 8, ".", option agent.circuit-id),
" Switch MAC: ",
binary-to-ascii (16, 8, ":", suffix ( option agent.remote-id, 6)),
" Switch IP: ",
binary-to-ascii(10, 8, ".", packet(24, 4)),
" VLAN: ",
binary-to-ascii (10, 16, "", substring( option agent.circuit-id, 2, 2)),
" MAC on the port: ",
binary-to-ascii (16, 8, ":", substring(hardware, 1, 6))
)
);
}

isc-dhcpd option 82 (��)

Sun, 10 Feb 2013 07:34:32 GMT

� �� , �� match, �� :(

isc-dhcpd option 82 (alexmasz)

Sun, 10 Feb 2013 06:40:24 GMT

> �� match ��?
> match if (binary-to-ascii(10,8,"",suffix(option agent.circuit-id,1)) = "10004") and
> (binary-to-ascii(16,8,"",substring(option agent.remote-id,2,6)) = "64700291440f");

� �� :

log(info, "***");
if exists agent.circuit-id {
log( info,concat("*Leased ",binary-to-ascii(10,8,".",leased-address)," (with opt82)") );
log( info,concat("*Remote-ID: ",binary-to-ascii(16,8,":",substring(option agent.remote-id,2,6))) );
log( info,concat("*Port: ",binary-to-ascii(10,8,"",suffix(option agent.circuit-id,1))) );
} else {
log( info,concat("*Leased ",binary-to-ascii(10,8,".",leased-address)," (without opt82)") );
}
log(info, "***");

class "247-10-1/4" { match if option agent.circuit-id="Vlan100+Ethernet1/4" and option agent.remote-id="247-10"; }

shared-network vlan100 {
subnet 192.168.100.0 netmask 255.255.255.0 {
option domain-name-servers 192.168.100.2;
option domain-name "dns.here";

isc-dhcpd option 82 (��)

Sat, 09 Feb 2013 19:15:35 GMT

�� tshark

Option: (t=82,l=14) Agent Information Option
Option: (82) Agent Information Option
Length: 14
Value: 010400010004020664700291440f
Agent Circuit ID: 00010004
Agent Remote ID: 64700291440f
End Option

�� match ��?

match if (binary-to-ascii(10,8,"",suffix(option agent.circuit-id,1)) = "10004") and
(binary-to-ascii(16,8,"",substring(option agent.remote-id,2,6)) = "64700291440f");

isc-dhcpd option 82 (alexmasz)

Sat, 09 Feb 2013 18:35:26 GMT

>> �� , �� , �� , ��
>> dhdcpd � �� 82
>Agent-Information Option 82, length 6:
> Circuit-ID SubOption 1, length 1: 0
> Remote-ID SubOption 2, length 1: 0

�� , �� , ��, ��-��

>> ��:

ddns-update-style interim;
default-lease-time 3600;
max-lease-time 7200;
authoritative;
log-facility local7;
ignore client-updates;

log(info, "***");
if exists agent.circuit-id {
log( info,concat("*Leased ",binary-to-ascii(10,8,".",leased-address)," (with opt82)") );
log( info,concat("*Remote-ID: ",binary-to-ascii(16,8,":",substring(option agent.remote-id,2,6))) );
log( info,concat("*Port: ",binary-to-ascii(10,8,"",suffix(option agent.circuit-id,1))) );
} else {
log( info,concat("*Leased ",binary-to-ascii(10,8,".",leased-address)," (without opt82)") );
}
log(info, "***");

>> ��:

20:29:01.729003 IP (tos 0x0, ttl 128, id 22004, offset 0, flags [none], pr

isc-dhcpd option 82 (John)

Sat, 09 Feb 2013 17:49:49 GMT

> �� , �� , �� , ��
> dhdcpd � �� 82
> �� , ��

tcpdump, wireshark, ...

isc-dhcpd option 82 (��)

Sat, 09 Feb 2013 17:35:14 GMT

�� , �� , �� , �� dhdcpd � �� 82

�� , ��

isc-dhcpd option 82 (John)

Sat, 09 Feb 2013 16:12:00 GMT

class "logging" {
log(info, concat(
"VLAN = ", binary-to-ascii(10, 16, "", substring(option agent.circuit-id, 2, 2)),
", Port = ", binary-to-ascii(10, 8, "", substring(option agent.circuit-id, 5, 1)),
", AgentIP = ", binary-to-ascii(10, 8, ".", packet(24, 4))
)
);

match if (
exists agent.circuit-id
);
}

class "Class_1" {
match if (
(
exists agent.circuit-id
and
binary-to-ascii(10, 16, "", substring(option agent.circuit-id, 2, 2)) = "<VLAN_ID>"
) or (
binary-to-ascii(10, 8, ".", packet(12, 3)) = "A.B.C"
)
);
}

subnet A.B.C.0 netmask 255.255.255.0 {
pool {
option subnet-mask 255.255.255.0;
option routers A.B.C.254;

deny dynamic bootp clients;
allow members of "Class_1";

range A.B.C.1 A.B.C.253;
}
}

OpenForum RSS: isc-dhcpd option 82

isc-dhcpd option 82 (��������)

isc-dhcpd option 82 (��������)

isc-dhcpd option 82 (��������)

isc-dhcpd option 82 (alexmasz)

isc-dhcpd option 82 (��������)

isc-dhcpd option 82 (alexmasz)

isc-dhcpd option 82 (John)

isc-dhcpd option 82 (��������)

isc-dhcpd option 82 (John)

isc-dhcpd option 82 (��)

isc-dhcpd option 82 (��)

isc-dhcpd option 82 (��)

isc-dhcpd option 82 (��)

isc-dhcpd option 82 (��)