AVadm1-1 (2)

Cisco switchi ja routeri algadministreerimine

Eesmärgid
Turvalisus
Kättesaadavus

Võrgu administraatori ülesanded
Võrgu planeerimine (seadmed, lisaprotokollid, lisateenused, seadmete paigaldamine, võrgu segmenteerimine)
Võrgu sõlmede paigaldamine ja seadistamine (arvutid, kommutatsiooniseadmed)
Võrguprotokollide seadistamine
Võrgu teenistuste seadistamine (DHCP, DNS, WINS (Windows Internet Name Service), marsruutimine, VPN, failid ja printerid; Microsoft Active Directory; e-post; andmebaasid)
Tõrkeotsing
Võrgu tõhususe parandamine
Võrgusõlmede jälgimine
Võrguliikluse jälgimine
Andmekaitse (backup, kasutajad ja kasutajapolitika, IPSec, VPN, PKI jne)

CLI (Command Line Interface)

CLI (2)

CLI (3)

Enable password

Terminal
PuTTY(putty.org)
TeraTerm
HyperTerm
Secure SRT

Basic commands

Basic commands (2)
hostname Sw1234
banner motd &***

Console password
router#conf t
!--- Enter configuration commands, one per line. End with CNTL/Z.
router(config)#line con 0
router(config-line)#
router(config-line)#password
router(config-line)#login ---------enable password checking at login---
(show running-config)
router#write memory

Telnet password
router#conf t
!--- Enter configuration commands, one per line. End with CNTL/Z.
router(config)#line vty 0 4
router(config-line)#
router(config-line)#password
router(config-line)#login
router(config-line)#end
router#
(sh run, sh int)
router#write memory

Enable password
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#enable secret SecretPassword
Router(config)#exit
Router#
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#service password-encryption
Router(config)#exit

More commands
no IP-domain lookup
show ip interface brief
shutdown – no shutdown

IP-address for switch
int vlan 1
ip add 10.1.1.1 255.255.255.0
no shutdown
Try to connect using telnet from the PC
telnet 10.1.1.1
Milliseid paroole on vaja switchiga ühenduse loomiseks?
Which of the passwords you need to connect to the switch?
Какие из паролей необходимы, чтобы подключиться к коммутатору?

CPT
Loogiline skeem
Füüsiline skeem

Seadmete hierarhia

Hubs and bridges

Collision domains
Võrgu kokkupõrge tekib siis, kui mitu seadet üritab võrgusegmendis paketti saata korraga.
A network collision occurs when more than one device attempts to send a packet on a network segment at the same time.

Hubs and bridges
1) PC1: IP-192.168.1.1, Mask-255.255.255.0
2) PC2: IP-192.168.1.2, Mask-255.255.255.0
3) PC3: IP-192.168.1.3, Mask-255.255.255.0
4) PC4: IP-192.168.1.4, Mask-255.255.255.0
5) PC5: IP-192.168.1.5, Mask-255.255.255.0
6) PC6: IP-192.168.1.6, Mask-255.255.255.0
7) PC7: IP-192.168.1.7, Mask-255.255.255.0.
8) PC8: IP-192.168.1.8, Mask-255.255.255.0.
9) PC9: IP-192.168.1.9, Mask-255.255.255.0.
10) PC10: IP-192.168.1.10, Mask-255.255.255.0.

Hubs and bridges (2)
Kirjeldage, milliseid protokolle kasutatakse ja kuidas sild töötab?
Describe what protocols are using and how the bridge works. Опишите, какие протоколы используются и каков принцип работы моста.
Mitu kokkupõrke domeeni see võrk omab?
How many collision domains have this network? Сколько доменов коллизий в этой сети?

Switches

Switches
Bridge – program commutation, switch – hardware commutation (ASIC)
Level 2
Level 2+ (3?)

Switches (2)
1) PC1: IP-192.168.1.1, Mask-255.255.255.0.
2) PC2: IP-192.168.1.2, Mask-255.255.255.0.
3) PC3: IP-192.168.1.3, Mask-255.255.255.0.
4) PC4: IP-192.168.1.4, Mask-255.255.255.0.

Switches (3)
show mac-address-table

Switches (3)
Kirjeldage, kuidas lüliti täidab MAC-aadressitabelit.
Describe how the switch fills the MAC-address table.
Опишите, как коммутатор заполняет таблицу MAC-адресов.