Проблема следующая:

На 3526 настроено:

DES-3526:admin#show ipif
Command: show ipif

IP Interface Settings

Interface Name : System
IP Address : 10.10.10.3 (MANUAL)
Subnet Mask : 255.255.255.0
VLAN Name : hard
Admin. State : Enabled
Link Status : Link UP
Member Ports : 25-26

Total Entries : 1

DES-3526:admin#show vlan
Command: show vlan

VID : 1 VLAN Name : default
VLAN TYPE : static Advertisement : Enabled
Member ports :
Static ports :
Current Tagged ports :
Current Untagged ports :
Static Tagged ports :
Static Untagged ports :
Forbidden ports :

VID : 10 VLAN Name : user1
VLAN TYPE : static Advertisement : Disabled
Member ports : 1-26
Static ports : 1-26
Current Tagged ports : 25-26
Current Untagged ports : 1-24
Static Tagged ports : 25-26
Static Untagged ports : 1-24
Forbidden ports :

VID : 100 VLAN Name : hard
VLAN TYPE : static Advertisement : Disabled
Member ports : 25-26
Static ports : 25-26
Current Tagged ports : 25-26
Current Untagged ports :
Static Tagged ports : 25-26
Static Untagged ports :
Forbidden ports :

Total Entries : 3

DES-3526:admin#show dhcp_relay
Command: show dhcp_relay

DHCP/BOOTP Relay Status : Enabled
DHCP/BOOTP Hops Count Limit : 4
DHCP/BOOTP Relay Time Threshold : 0
DHCP Relay Agent Information Option 82 State : Enabled
DHCP Relay Agent Information Option 82 Check : Disabled
DHCP Relay Agent Information Option 82 Policy : Replace

Interface Server 1 Server 2 Server 3 Server 4
------------ --------------- --------------- --------------- --------------
System 10.1.1.1


На 3612 настроено:

DGS-3612G:4#show ipif
Command: show ipif

IP Interface Settings

Interface Name : Vlan1
Secondary : FALSE
IP Address : 10.1.1.2 (MANUAL)
Subnet Mask : 255.255.255.0
VLAN Name : user1
Admin. State : Enabled
Link Status : Link UP
Member Ports : 1-12

Interface Name : System
Secondary : FALSE
IP Address : 10.10.10.2 (MANUAL)
Subnet Mask : 255.255.255.0
VLAN Name : hard
Admin. State : Enabled
Link Status : Link UP
Member Ports : 1-12

Total Entries : 2

DGS-3612G:4#show vlan
Command: show vlan

VID : 1 VLAN Name : default
VLAN TYPE : 1QVLAN Protocol ID :
UserDefinedPid : Advertisement : Enabled
Encap :
Member ports :
Static ports :
Untagged ports :
Forbidden ports :

VID : 10 VLAN Name : user1
VLAN TYPE : 1QVLAN Protocol ID :
UserDefinedPid : Advertisement : Disabled
Encap :
Member ports : 1-12
Static ports : 1-12
Untagged ports :
Forbidden ports :

VID : 100 VLAN Name : hard
VLAN TYPE : 1QVLAN Protocol ID :
UserDefinedPid : Advertisement : Disabled
Encap :
Member ports : 1-12
Static ports : 1-12
Untagged ports :
Forbidden ports :


Total Entries : 3

DGS-3612G:4#show dhcp_relay
Command: show dhcp_relay

DHCP/Bootp Relay Status : Enabled
DHCP/Bootp Hops Count Limit : 4
DHCP/Bootp Relay Time Threshold : 0
DHCP Relay Agent Information Option 82 State : Disabled
DHCP Relay Agent Information Option 82 Check : Disabled
DHCP Relay Agent Information Option 82 Policy : Replace

Interface Server 1 Server 2 Server 3 Server 4
------------ --------------- --------------- --------------- ---------------

DHCP сервер в логах пишет:

Oct 16 13:10:59 snake dhcpd: Multiple interfaces match the same shared network: vlan0 vlan1
Oct 16 13:11:03 snake last message repeated 3 times
Oct 16 13:11:16 snake dhcpd: DHCPDISCOVER from 00:16:36:b4:45:38 via vlan1: network clients: no free leases
Oct 16 13:11:47 snake last message repeated 30 times
Oct 16 13:12:34 snake last message repeated 48 times
Oct 16 13:15:30 snake dhcpd: Multiple interfaces match the same shared network: vlan0 vlan1
Oct 16 13:15:32 snake last message repeated 2 times
Oct 16 13:15:57 snake dhcpd: DHCPDISCOVER from 00:1b:24:39:f9:d9 via vlan1: network clients: no free leases
Oct 16 13:16:04 snake last message repeated 6 times

а в DHCP.leases:

lease 10.1.1.100 {
starts 2 2007/10/16 13:15:58;
ends 2 2007/10/16 14:55:58;
binding state active;
next binding state free;
hardware ethernet 00:1b:24:39:f9:d9;
uid "\001\000\033$9\371\331";
option agent.circuit-id 0:4:0:a:0:1;
option agent.remote-id 0:6:0:19:5b:d3:d0:3c;
client-hostname "admin-958523324";
}
lease 10.1.1.100 {
starts 2 2007/10/16 13:15:58;
ends 2 2007/10/16 13:15:59;
tstp 2 2007/10/16 13:15:59;
binding state free;
hardware ethernet 00:1b:24:39:f9:d9;
uid "\001\000\033$9\371\331";
}
lease 10.1.1.100 {
starts 2 2007/10/16 13:15:59;
ends 2 2007/10/16 14:55:59;
binding state active;
next binding state free;
hardware ethernet 00:1b:24:39:f9:d9;
uid "\001\000\033$9\371\331";
option agent.circuit-id 0:4:0:a:0:1;
option agent.remote-id 0:6:0:19:5b:d3:d0:3c;
client-hostname "admin-958523324";
}
lease 10.1.1.100 {
starts 2 2007/10/16 13:15:59;
ends 2 2007/10/16 13:16:00;
tstp 2 2007/10/16 13:16:00;
binding state free;
hardware ethernet 00:1b:24:39:f9:d9;
uid "\001\000\033$9\371\331";
}

и так повторяется, пока не отключу сетевое подключение на компютере(Windows XP SP2 Proffesional), или не дасть ограниченую IP адресу.

dhcpd.conf:

# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#

#use-lease-addr-for-default-route on;
#one-lease-per-client on;

#server-identifier 10.10.10.1;
#local-address 10.10.10.1;


default-lease-time 6000;
max-lease-time 6000;

ddns-update-style none;

log-facility local7;
authoritative;
ignore client-updates;

class "dlink1" {
match if binary-to-ascii(10, 8, ":", substring(option agent.circuit-id, 4, 2)) = "0:1" and binary-to-ascii(16, 8, ":", substring(option agent.remote-id, 2, 6)) = "0:19:5b:d3:d0:3c";
}

shared-network "clients" {

subnet 10.10.10.0 netmask 255.255.255.0 { not authoritative; }

subnet 10.1.1.0 netmask 255.255.255.0 {
pool { range 10.1.1.100; allow members of "dlink1"; }
}
}


подскажыте где проблему искать?

ну пишет жежну сделайтеи все должно работать ...
жаль есть огромная неприятность, почему-то невозможно указать на каких собсно портах долежен работать DHCP Relay

Спасибо все уже разобрался, все работает