Добрый день.
Пробую на стенде настроить dhcp_relay с option_82 , схема простая: Клиент>>DES-3200-28>>Сервер DHCP
Наблюдаю такую картину: с клиента уходит DHCPDISCOVER, коммутатор добавляет 82 опцию, Сервер DHCP получает DHCPDISCOVER с 82 опцией и в ответ отправляет DHCPOFFER на коммутатор. Клиент никаких пакетов в ответ от коммутатора не получает.
Вот вывод dhcpdump на стороне сервера
TIME: 2013-10-29 11:26:36.604
IP: 172.16.0.100 (28:10:7b:fe:8a:60) > 172.16.0.90 (8:0:27:62:e:db)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 1
XID: c692b562
SECS: 42
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 172.16.0.100
CHADDR: 00:1a:80:d5:94:01:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 1 (DHCPDISCOVER)
OPTION: 55 ( 19) Parameter Request List 1 (Subnet mask)
28 (Broadcast address)
3 (Routers)
121 (Classless Static Route)
26 (Interface MTU)
12 (Host name)
15 (Domainname)
119 (Domain Search)
6 (DNS server)
40 (NIS domain)
41 (NIS servers)
87 (NDS context)
85 (NDS server)
86 (NDS tree name)
44 (NetBIOS name server)
45 (NetBIOS datagram distribution server)
46 (NetBIOS node type)
47 (NetBIOS scope)
42 (NTP servers)
OPTION: 82 ( 18) Relay Agent Information
Circuit-ID 00:04:01:2c:00:13
Remote-ID 00:06:28:10:7b:fe:8a:60
---------------------------------------------------------------------------
TIME: 2013-10-29 11:26:36.608
IP: 172.16.0.90 (8:0:27:62:e:db) > 172.16.0.100 (28:10:7b:fe:8a:60)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 1
XID: c692b562
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 192.168.250.250
SIADDR: 172.16.0.90
GIADDR: 172.16.0.100
CHADDR: 00:1a:80:d5:94:01:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 2 (DHCPOFFER)
OPTION: 1 ( 4) Subnet mask 255.255.255.0
OPTION: 3 ( 4) Routers 172.16.0.200
OPTION: 51 ( 4) IP address leasetime 3600 (60m)
OPTION: 6 ( 4) DNS server 172.16.0.1
OPTION: 54 ( 4) Server identifier 172.16.0.90
---------------------------------------------------------------------------
TIME: 2013-10-29 11:26:51.131
IP: 172.16.0.100 (28:10:7b:fe:8a:60) > 172.16.0.90 (8:0:27:62:e:db)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 1
XID: c692b562
SECS: 56
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 172.16.0.100
CHADDR: 00:1a:80:d5:94:01:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 1 (DHCPDISCOVER)
OPTION: 55 ( 19) Parameter Request List 1 (Subnet mask)
28 (Broadcast address)
3 (Routers)
121 (Classless Static Route)
26 (Interface MTU)
12 (Host name)
15 (Domainname)
119 (Domain Search)
6 (DNS server)
40 (NIS domain)
41 (NIS servers)
87 (NDS context)
85 (NDS server)
86 (NDS tree name)
44 (NetBIOS name server)
45 (NetBIOS datagram distribution server)
46 (NetBIOS node type)
47 (NetBIOS scope)
42 (NTP servers)
OPTION: 82 ( 18) Relay Agent Information
Circuit-ID 00:04:01:2c:00:13
Remote-ID 00:06:28:10:7b:fe:8a:60
---------------------------------------------------------------------------
TIME: 2013-10-29 11:26:51.136
IP: 172.16.0.90 (8:0:27:62:e:db) > 172.16.0.100 (28:10:7b:fe:8a:60)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 1
XID: c692b562
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 192.168.250.250
SIADDR: 172.16.0.90
GIADDR: 172.16.0.100
CHADDR: 00:1a:80:d5:94:01:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 2 (DHCPOFFER)
OPTION: 1 ( 4) Subnet mask 255.255.255.0
OPTION: 3 ( 4) Routers 172.16.0.200
OPTION: 51 ( 4) IP address leasetime 3600 (60m)
OPTION: 6 ( 4) DNS server 172.16.0.1
OPTION: 54 ( 4) Server identifier 172.16.0.90
---------------------------------------------------------------------------
Соответственно со стороны клиента только исходящие DHCPDISCOVER и все.
Клиент включен в 19 порт, сервер в 3 порт.
Коммутатор DES-3200-28, ревизия C1, прошивка 4.36.B009, вот конфигурация
Command: show config current_config include "dhcp"
disable address_binding dhcp_snoop
disable address_binding dhcp_snoop ipv6
config address_binding dhcp_snoop max_entry ports 1-28 limit no_limit ipv6
config filter dhcp_server ports all state disable
config filter dhcp_server illegal_server_log_suppress_duration 5min
config filter dhcp_server trap_log disable
config ipif System dhcp_option12 state disable
disable dhcp_local_relay
config dhcp_local_relay option_82 remote_id default
config dhcp_local_relay option_82 circuit_id default
config dhcp_local_relay vlan v100 state enable
config dhcp_local_relay option_82 ports 1-28 policy keep
enable dhcp_relay
config dhcp_relay hops 4 time 0
config dhcp_relay option_82 state enable
config dhcp_relay option_82 check enable
config dhcp_relay option_82 policy replace
config dhcp_relay option_82 remote_id default
config dhcp_relay option_82 circuit_id default
config dhcp_relay option_60 state disable
config dhcp_relay option_61 state disable
config dhcp_relay add ipif System 172.16.0.90
config dhcp_relay option_60 default mode drop
config dhcp_relay option_61 default drop
config dhcp_relay ports 1-28 state enable
Command: show ipif
IP Interface : System
VLAN Name : v100
Interface Admin State : Enabled
Link Status : LinkUp
IPv4 Address : 172.16.0.100/24 (Manual)
IPv4 State : Enabled
IPv6 State : Enabled
DHCP Option12 State : Disabled
DHCP Option12 Host Name :
Command: show vlan
VLAN Trunk State : Disabled
VLAN Trunk Member Ports :
VID : 1 VLAN Name : default
VLAN Type : Static Advertisement : Enabled
Member Ports : 27-28
Static Ports : 27-28
Current Tagged Ports :
Current Untagged Ports: 27-28
Static Tagged Ports :
Static Untagged Ports : 27-28
Forbidden Ports :
VID : 100 VLAN Name : v100
VLAN Type : Static Advertisement : Disabled
Member Ports : 1-8,25-26
Static Ports : 1-8,25-26
Current Tagged Ports : 7-8
Current Untagged Ports: 1-6,25-26
Static Tagged Ports : 7-8
Static Untagged Ports : 1-6,25-26
Forbidden Ports :
VID : 200 VLAN Name : v200
VLAN Type : Static Advertisement : Disabled
Member Ports : 9-16
Static Ports : 9-16
Current Tagged Ports : 15-16
Current Untagged Ports: 9-14
Static Tagged Ports : 15-16
Static Untagged Ports : 9-14
Forbidden Ports :
VID : 300 VLAN Name : v300
VLAN Type : Static Advertisement : Disabled
Member Ports : 17-24
Static Ports : 17-24
Current Tagged Ports : 23-24
Current Untagged Ports: 17-22
Static Tagged Ports : 23-24
Static Untagged Ports : 17-22
Forbidden Ports :
В чем может быть проблема?