VLAN-, , . VLAN Cisco.

VLAN Catalyst
, Cisco VLAN. VLAN . , Cisco Catalyst 2960 3650 4000 . VLAN 1 1005, 1006 4094. VLAN Cisco Catalyst 2960 Cisco IOS 15 .
Switch# show vlan brief VLAN Name Status Ports ---- ----------------- ------- -------------------- 1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/5, Fa0/6, Fa0/7, Fa0/8 Fa0/9, Fa0/10, Fa0/11, Fa0/12 Fa0/13, Fa0/14, Fa0/15, Fa0/16 Fa0/17, Fa0/18, Fa0/19, Fa0/20 Fa0/21, Fa0/22, Fa0/23, Fa0/24 Gi0/1, Gi0/2 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup
VLAN
:
- , ;
- 1 1005;
- 1002 1005 (Token Ring, FDDI);
- 1002 1005 ;
- VLAN VLAN, vlan.dat;
- VTP, , VLAN .
VLAN:
- ;
- 1006 4094;
- , running-config;
- , VLAN;
- VLAN VTP transparent.
: VLAN 802.1Q. VLAN ID 802.1Q IEEE 12 , 4096 -- VLAN Catalyst. , VXLAN.
VLAN
VLAN , , vlan.dat
, copy running-config startup-config
write memory
. , VLAN, .
, VLAN . VLAN , .
IOS | |
| Switch# configure terminal |
VLAN ID | Switch(config)# vlan vlan-id |
VLAN | Switch(config-vlan)# name vlan-name |
EXEC | Switch(config-vlan)# end |
VLAN
, Stundent, VLAN, IP 172.17.20.22, VLAN 20.

VLAN 20 student S1.
S1# configure terminal S1(config)# vlan 20 S1(config-vlan)# name student S1(config-vlan)# end
: VLAN- , , . , vlan 100,102,105-107 5 VLAN- 100, 102, 105, 106, 107
VLAN
VLAN, VLAN.
access VLAN. switchport mode access
, , access, VLAN Hopping.
IOS | |
| Switch# configure terminal |
| Switch(config)# interface interface-id |
access | Switch(config-if)# switchport mode access |
VLAN'. | Switch(config-if)# switchport access vlan vlan-id |
EXEC | Switch(config-if)# end |
: interface range.
VLAN
F0/6 S1 access VLAN 20. , , 20- VLAN-, 2 .

.
S1# configure terminal S1(config)# interface fa0/6 S1(config-if)# switchport mode access S1(config-if)# switchport access vlan 20 S1(config-if)# end
VLAN , . 2 IP , VLAN 20, . VLAN 20 , , 2 (172.17.20.0/24).
VLAN VLAN
access VLAN- . , VLAN. , IP , VLAN-, - VLAN- .
, , 5 IP , F0/18 S3. VLAN VLAN.

VLAN VLAN
VLAN switchport voice vlan [vlan-id]
.
, , QoS. , . , , mls qos trust [cos | device cisco-phone | dscp | ip-precedence]
.
VLAN- F0/18 S3 VLAN 20, VLAN 150 QoS, CoS.
S3(config)# vlan 20 S3(config-vlan)# name student S3(config-vlan)# vlan 150 S3(config-vlan)# name VOICE S3(config-vlan)# exit S3(config)# interface fa0/18 S3(config-if)# switchport mode access S3(config-if)# switchport access vlan 20 S3(config-if)# mls qos trust cos S3(config-if)# switchport voice vlan 150 S3(config-if)# end
VLAN switchport access vlan
. , VLAN 30 switchport vlan brief
. switchport access vlan 30
:
% Access VLAN does not exist. Creating vlan 30
VLAN
VLAN, show
.
show vlan
VLAN. . : show vlan [brief | id vlan-id | name vlan-name | summary]
.
show vlan
.
| |
, VLAN VLAN | brief |
VLAN ID. vlan-id 1 4094 | id vlan-id |
VLAN. Vlan-name - ASCII 1 32 . | name vlan-name |
VLAN | summary |
show vlan summary
VLAN :
S1# show vlan summary Number of existing VLANs : 7 Number of existing VTP VLANs : 7 Number of existing extended VLANS : 0
show interfaces interface-id switchport
show interfaces vlan vlan-id
. , show interfaces fa0/18 switchport
F0/18 VLAN VLAN .
S1# show interfaces fa0/18 switchport Name: Fa0/18 Switchport: Enabled Administrative Mode: static access Operational Mode: static access Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: native Negotiation of Trunking: Off Access Mode VLAN: 20 (student) Trunking Native Mode VLAN: 1 (default) Voice VLAN: 150 Administrative private-vlan host-association: none (Output omitted)
VLAN
VLAN-.
VLAN , switchport access vlan vlan-id
VLAN. , F0/18 VLAN VLAN 1. VLAN 20, switchport access vlan 20.
VLAN no switchport access vlan
.
, 18- VLAN .
S1(config)# interface fa0/18 S1(config-if)# no switchport access vlan S1(config-if)# end S1# S1# show vlan brief VLAN Name Status Ports ---- ------------------ --------- ------------------------------- 1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/5, Fa0/6, Fa0/7, Fa0/8 Fa0/9, Fa0/10, Fa0/11, Fa0/12 Fa0/13, Fa0/14, Fa0/15, Fa0/16 Fa0/17, Fa0/18, Fa0/19, Fa0/20 Fa0/21, Fa0/22, Fa0/23, Fa0/24 Gi0/1, Gi0/2 20 student active 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup , 20- VLAN , , . , 18- VLAN 1, show interfaces f0/18 switchport: S1# show interfaces fa0/18 switchport Name: Fa0/18 Switchport: Enabled Administrative Mode: static access Operational Mode: static access Administrative Trunking Encapsulation: negotiate Operational Trunking Encapsulation: native Negotiation of Trunking: Off Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (default)
VLAN
VLAN no vlan vlan-id
.
: VLAN , VLAN .
vlan.dat
delete flash:vlan.dat
EXEC. VLAN .
: Catalyst , .erase startup-config
delete vlan.dat
. .
Trunk
VLAN, Trunk . Trunk OSI , VLAN ( VLAN ).
Trunk , :
IOS | |
| Switch# configure terminal |
| Switch(config)# interface interface-id |
| Switch(config-if)# switchport mode trunk |
native VLAN , VLAN 1 | Switch(config-if)# switchport trunk native vlan vlan-id |
VLAN, | Switch(config-if)# switchport trunk allowed vlan vlan-list |
EXEC | Switch(config-if)# end |
Trunk
VLAN 10, 20 30 Faculty, Student Guest. F0/1 S1 Trunk VLAN- 10, 20, 30. VLAN 99 native (VLAN ).

trunk, VLAN VLAN.
S1(config)# interface fastEthernet 0/1 S1(config-if)# switchport mode trunk S1(config-if)# switchport trunk native vlan 99 S1(config-if)# switchport trunk allowed vlan 10,20,30,99 S1(config-if)# end
: , Cisco Catalyst 2960, 802.1Q. . VLAN , .
Trunk
Fa0/1 S1. show interfaces interface-ID switchport
:
S1# show interfaces fa0/1 switchport Name: Fa0/1 Switchport: Enabled Administrative Mode: trunk Operational Mode: trunk Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 99 (VLAN0099) Administrative Native VLAN tagging: enabled Voice VLAN: none Administrative private-vlan host-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk native VLAN: none Administrative private-vlan trunk Native VLAN tagging: enabled Administrative private-vlan trunk encapsulation: dot1q Administrative private-vlan trunk normal VLANs: none Administrative private-vlan trunk associations: none Administrative private-vlan trunk mappings: none Operational private-vlan: none Trunking VLANs Enabled: ALL Pruning VLANs Enabled: 2-1001 (output omitted)
VLAN.
trunk
no switchport trunk allowed vlan
no switchport trunk native vlan
. VLAN- VLAN- VLAN 1.
S1(config)# interface fa0/1 S1(config-if)# no switchport trunk allowed vlan S1(config-if)# no switchport trunk native vlan S1(config-if)# end
show interfaces f0/1 switchport
, :
S1# show interfaces fa0/1 switchport Name: Fa0/1 Switchport: Enabled Administrative Mode: trunk Operational Mode: trunk Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (default) Administrative Native VLAN tagging: enabled Voice VLAN: none Administrative private-vlan host-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk native VLAN: none Administrative private-vlan trunk Native VLAN tagging: enabled Administrative private-vlan trunk encapsulation: dot1q Administrative private-vlan trunk normal VLANs: none Administrative private-vlan trunk associations: none Administrative private-vlan trunk mappings: none Operational private-vlan: none Trunking VLANs Enabled: ALL Pruning VLANs Enabled: 2-1001 (output omitted)
, trunk access.
S1(config)# interface fa0/1 S1(config-if)# switchport mode access S1(config-if)# end S1# show interfaces fa0/1 switchport Name: Fa0/1 Switchport: Enabled Administrative Mode: static access Operational Mode: static access Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: native Negotiation of Trunking: Off Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (default) Administrative Native VLAN tagging: enabled (output omitted)