, , , , (. ).
1. Cisco-1 SW-L2-1 (mnlin), , mnlin (. 3), FTP-.
3
2. DHCP Relay Agent. mnlin web- , 192.168.24.10. Network ApplicationDHCPDHCP Relay Global Settings DHCP Relay State DHCP Relay Agent Information Option 82 Enable (.4).
: MAC- , DHCP- 82, DHCP Relay Agent Information Option 82 Remote-ID.
4 DHCP Relay Global Settings
DHCP- Network ApplicationDHCPDHCP RelayDHCP Interface Settings (.5). (System) IP- : 192.168.24.1, .
5 DHCP Interface Settings
3. GE0/0 Cisco. (mnlin) Cisco . picocom:
root@mnlin# picocom /dev/ttyS0
ttyS0 com1, ttyS1 , com2 .. picocom Ctrl+A+Q.
cisco-1>
cisco-1>enable /
cisco-1#configure terminal /
cisco-1(config)#interface gigabitethernet 0/0 /
cisco-1(config-if)#ip address 192.168.24.1 255.255.255.0 / ip-
cisco-1(config-if)#no shutdown /
cisco-1(config-if)#end /
4. , 82, . , 82, . :
a) , .6, 82.
.6
b) 9 8. DHCP Discover 82, DHCP- (192.168.24.1). web- , MonitoringMirrorPort Mirror Settings 9 8 .7.
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c) eth1 mnlin, 8 . Start , .
d) ( ) DHCP 5 .
e) Option 82 DHCP Discover. 10 . bootp. DHCP, 192.168.24.1 ( Discover), Option (82): Agent information option. value 82. .
8 82
f) 7.
5. , .3.
6. DHCP-. (mnlin) Cisco DHCP- , .3.
DHCP- : / .
cisco-1#configure terminal
cisco-1(config)#ip dhcp database ftp://admin:@192.168.24.31/dhcp-db / DHCP- (FTP- mnlin)
cisco-1(config)#service dhcp / DHCP
cisco-1(config)#ip dhcp use class /
cisco-1(config)#ip dhcp excluded-address 192.168.24.1 192.168.24.59 / ,
cisco-1(config)#ip dhcp class port5 / port5
cisco-1(config-dhcp-class)#relay agent information /, option 82
cisco-1(config-dhcp-class-relayinfo)#relay-information hex 01060004000100050208000634080464befc / ; 82
cisco-1(config-dhcp-class-relayinfo)#end /
cisco-1#
cisco-1#configure terminal
cisco-1(config)#ip dhcp class port7
cisco-1(config-dhcp-class)#relay agent information
cisco-1(config-dhcp-class-relayinfo)#relay-information hex 01060004000100070208000634080464befc
cisco-1(config-dhcp-class-relayinfo)#end
cisco-1#configure terminal
cisco-1(config)#ip dhcp class common-net / port5 port7
cisco-1(config-dhcp-class)#relay agent information
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cisco-1(config-dhcp-class-relayinfo)#end
cisco-1#
cisco-1#configure terminal
cisco-1(config)#ip dhcp pool LAN1 / LAN1 , DHCP-
cisco-1(dhcp-config)#network 192.168.24.0 255.255.255.0 / , DHCP-
cisco-1(dhcp-config)#domain-name lan1.maket /
cisco-1(dhcp-config)#dns-server 192.168.24.1 /DNS-
cisco-1(dhcp-config)#default-router 192.168.24.1 /
cisco-1(dhcp-config)#class port5 / , port5
cisco-1(config-dhcp-pool-class)#address range 192.168.24.101 192.168.24.101 / ( , , )
cisco-1(config-dhcp-pool-class)#end
cisco-1#configure terminal
cisco-1(config)#ip dhcp pool LAN1 / LAN1
cisco-1(dhcp-config)#class port7
cisco-1(config-dhcp-pool-class)#address range 192.168.24.102 192.168.24.102
cisco-1(config-dhcp-pool-class)#end
cisco-1#
cisco-1#configure terminal
cisco-1(config)#ip dhcp pool LAN1
cisco-1(dhcp-config)#class common-net
cisco-1(config-dhcp-pool-class)#end
cisco-1#
cisco-1#show running-config /
DHCP- :
cisco-1#debug ip dhcp server class
DHCP server class debugging is on.
DHCP- .
7. IP-.
DHCP- Cisco :
cisco-1#show ip dhcp bindings
cisco-1#show ip dhcp conflicts
cisco-1#show ip dhcp database
cisco-1#show ip dhcp server statistics
:
cisco-1#clear ip dhcp binding *
cisco-1#clear ip dhcp conflict *
cisco-1#clear ip dhcp server statistics
8. , DHCP- A B (.3) .
: 82 82 MAC- .
:
1. DHCP, 82, .
2. .
3. , :
- ( . 3);
- ;
- DHCP- A B.
:
1. RFC 2131: Dynamic Host Configuration Protocol, R. Droms, Bucknell University, March 1997. http://tools.ietf.org/html/rfc2131
2. RFC 3046: DHCP Relay Agent Information Option M. Patrick, Motorola BCS, January 2001. http://tools.ietf.org/html/rfc3046
3. .. DHCP ( NAT/PAT). http://book.itep.ru/4/4/dhcp.htm.
