***HCIA第二天***
Subnet summary : take the same bit and go to different bits. The
summary conditions:
1) The mother network is the same 2) The mask is the same,
for example:
172.16.0 0000001.0/24
172.16.0 0000011.0/24
172.16.0 0001011.0/24
172.16.0 1000001.0 /24
172.16.0 1101111.0/24
Summary result: 172.16.0.0/16
Network cable: RJ-45 twisted pair, 8 copper wires
**T-568A:**green white green orange white blue white orange brown white brown
**T-568B:**orange white orange green white blue white green Brown white brown
Crossover line : A—BB—A, used for interconnecting
straight-through lines between devices of the same layer: A—AB—B, used for interconnecting
devices ofdifferent layers.Device command help system:
Tab key automatically completes commands
? View unknown commands and words
↑
↓
<Huawei>
<>–Representative mode, user mode–simple view and test
Huawei–device name
system-view
[huawei]
[] -system mode, you can configure
[huawei]quit/quit
save//Save the configuration
reboot//Restart the device
[huawei]sysname xie//Modify the device name
[xie]
[xie]user-interface console0//Enter the console port
[xie-ui-console0]set authentication password cipher //Set the password
[xie]display current-configuration//View the currently effective configuration
[xie]display clock//View Equipment time
clock datetime //Modify device time