SWITCHING

In switching use MAC Address ( Media Access Control ) - IANA Internet Assigned Numbers Authority ( will assign MAC)
- L2 Address ( Physical or Hardware address )

MAC Address will represents in 48 bit. It shows in  HEXA decimal , then it comes to 12 digits.
24 bits -OUI (Organizational Unique Identifier ) assigning from IANA plus 24 bits Vendor identifier ( Vendor side assign )

Cisco has lot of mac address , One of the Cisco MAC address starts with 

00000C

HEXA Decimal - 0-9
                       A-F(10-15) Base16
 A- 1010-10
 B- 1011-11
 C- 1100-12
 D- 1101-13
 E- 1110-14
 F- 1111-15

 converting bin --> digit
1010 - 8*1 + 4*0 + 2*1 + 1*0 = 10
1011 - 8*1 + 4*0 + 2*1 + 1*1 = 11

Main difference between router and switch is,switch  doesn't have a power button.

Available mac address 2^48.

Main Switch Functions :-

1.Address Learning
2.Forwarding
3.Loop Avoidance

Address Learning

Keeps all the learned mac address in CAM (Content Addressable Memory).

sw#show mac address table

 By default it switch will show 

port mac method vlan
-      -     cpu       -
-      -     cpu       -

Method will show the in built switch mac addresses.

ARP will use to get the MAC address . 

B-SOFT RACK : CCNP 




Cisco Terminal Sever -2511 

ACCESS SERVER(config)#ip host sw1 2013
ACCESS SERVER#sh line

ACCESS SERVER#sh word

L2 switches : 

2900 
1900

L3 switches :

3500
3700
4000
6000
12000

Hub 

Its a L1 device 

Not Manageable ( No console access )

Single Broadcast and collision Domain

Half duplex

What ever bits comes it broadcast to all

Switch

L2 device

MAC address

Half duplex

Single broadcast domain
Total no. of ports equal to collision domain ( Multiple Collision domain )
Intelligent devices ( console access )