GNS3 (Graphical Network Simulator) — это графический симулятор сети, который позволяет смоделировать виртуальную сеть из маршрутизаторов и виртуальных машин. Незаменимый инструмент для обучения и тестов. Работает практически на всех платформах. Отлично подходит для создания стендов на десктоп машинах.
В зависимости от аппаратной платформы, на которой будет использоваться GNS3, возможно построение комплексных проектов, состоящих из маршрутизаторов Cisco, Cisco ASA, Juniper, а также серверов под управлением сетевых операционных систем.
GNS3 имеет два серьёзных недостатка:
conf t
int fa 0/0
no shut
ip address dhcp
ip domain-lookup
conf t (Режим глобальной конфигурации)Осталось проверить есть ли подключение к сети Интернет. Для этого пропингуем любой сайт. Например, гугл.
int fa 0/0 (Режим конфигурирования интерфейса)
no shut (команда включения интерфейса)
ip address dhcp (указывает, что интерфейс получает IP-адрес через DHCP)
ip domain-lookup (разрешения имён хостов на IP-адреса и наоборот)
Connected to Dynamips VM "R1" (ID 0, type c3600) - Console port
Press ENTER to get the prompt.
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export@cisco.com.
Cisco 3660 (R527x) processor (revision 1.0) with 124928K/6144K bytes of memory.
Processor board ID FTX0945W0MY
R527x CPU at 250MHz, Implementation 40, Rev 1.2, 512KB L2 Cache
3660 Chassis type: ENTERPRISE
2 FastEthernet interfaces
DRAM configuration is 64 bits wide with parity enabled.
125K bytes of NVRAM.
8192K bytes of processor board System flash (Read/Write)
SETUP: new interface FastEthernet0/0 placed in "shutdown" state
SETUP: new interface FastEthernet0/1 placed in "shutdown" state
Press RETURN to get started!
*Mar 1 00:00:03.091: %LINEPROTO-5-UPDOWN: Line protocol on Interface VoIP-Null0, changed state to up
*Mar 1 00:00:03.183: %SYS-5-CONFIG_I: Configured from memory by console
*Mar 1 00:00:03.319: %LINEPROTO-5-UPDOWN: Line protocol on Interface IPv6-mpls, changed state to up
*Mar 1 00:00:03.463: %SYS-5-RESTART: System restarted --
Cisco IOS Software, 3600 Software (C3660-A3JK9S-M), Version 12.4(15)T14, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Tue 17-Aug-10 11:00 by prod_rel_team
*Mar 1 00:00:03.467: %SNMP-5-COLDSTART: SNMP agent on host R1 is undergoing a cold start
*Mar 1 00:00:03.491: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to administratively down
*Mar 1 00:00:03.503: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF
*Mar 1 00:00:03.507: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF
*Mar 1 00:00:03.507: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF
*Mar 1 00:00:03.507: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF
*Mar 1 00:00:03.543: %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to administratively down
*Mar 1 00:00:04.491: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down
*Mar 1 00:00:04.543: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
R1#
R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#int fa 0/0
R1(config-if)#no shut
R1(config-if)#
*Mar 1 00:00:45.887: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Mar 1 00:00:46.887: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R1(config-if)#ip address dhcp
R1(config-if)#
*Mar 1 00:01:13.071: %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet0/0 assigned DHCP address 192.168.137.31, mask 255.255.255.0, hostname R1
R1(config-if)#ip domain-lookup
R1(config)#^Z
R1#
*Mar 1 00:02:15.551: %SYS-5-CONFIG_I: Configured from console by console
R1#ping google.ru
Translating "google.ru"...domain server (192.168.137.1) [OK]
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 173.194.73.94, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/35/44 ms
R1#
К сожалению, не доступен сервер mySQL