Difference between revisions of "VLAN Cisco IOS"

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=Related topics=
 
=Related topics=
 
*[[VLAN Trunk Cisco IOS]]
 
*[[VLAN Trunk Cisco IOS]]
 +
*[[Private VLAN Cisco IOS]]
 +
 
=Cisco Materials=
 
=Cisco Materials=
 
*[http://mars.tekkom.dk/cisco/ccnp3/ch2/2_2_1/index.html CCNP 3 chapter 2 Implementing VLAN's]
 
*[http://mars.tekkom.dk/cisco/ccnp3/ch2/2_2_1/index.html CCNP 3 chapter 2 Implementing VLAN's]
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</source>
 
</source>
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{{Source cli}}
 
{{Source cli}}
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[[Category:Cisco]][[Category:CCNA]][[Category:CCNP]][[Category:IOS]][[Category:Network]][[Category:CCNP3]]
 
[[Category:Cisco]][[Category:CCNA]][[Category:CCNP]][[Category:IOS]][[Category:Network]][[Category:CCNP3]]

Latest revision as of 12:28, 9 October 2017

Related topics

Cisco Materials

Show commands

Show vlan

Gives a great view of VLAN's and which ports are assigned to it. Try also show vlan brief 

SW2#<input>show vlan</input>

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa0/1, Fa0/2, Gi0/2
100  Admin                            active
101  Sales                            active
102  Students                         active    Fa0/8, Fa0/9, Fa0/10, Fa0/11
                                                Fa0/12, Fa0/13, Fa0/14, Fa0/22
1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1    enet  100001     1500  -      -      -        -    -        0      0
100  enet  100100     1500  -      -      -        -    -        0      0
101  enet  100101     1500  -      -      -        -    -        0      0
102  enet  100102     1500  -      -      -        -    -        0      0
1002 fddi  101002     1500  -      -      -        -    -        0      0
1003 tr    101003     1500  -      -      -        -    -        0      0
1004 fdnet 101004     1500  -      -      -        ieee -        0      0
1005 trnet 101005     1500  -      -      -        ibm  -        0      0

Remote SPAN VLANs
------------------------------------------------------------------------------


Primary Secondary Type              Ports
------- --------- ----------------- ------------------------------------------


Show VLAN Field Descriptions

Show VLAN Field Descriptions
Field Description
VLAN VLAN number
Name Name of the VLAN, if configured
Status Status of the VLAN (Active or suspended)
Ports Ports taht belong to the VLAN
Type Media type of the VLAN
SAID Security Association ID value of the VLAN
MTU Maximum Transfer Unit of the VLAN
Parent Parent VLAN if existing
RingNo Ring Number of the VLAN, if applicable
BrdgNo Brudge number of the VLAN, if applicable
STP Spanning Tree Protocol type used on the VLAN
BrdgMode Bridging mode for this VLAN
Trans1 Translation bridge 1
AREHops Maximum number of hops for all-routers explorer frames
STEHops Maximum number of hops for spanning tree explorer frames

Show interfaces

A quick summary of all ports and their status 

SW2#<input>show interfaces status</input>

Port      Name               Status       Vlan       Duplex  Speed Type
....
Fa0/8                        notconnect   102          auto   auto 10/100BaseTX
Fa0/9                        notconnect   102          auto   auto 10/100BaseTX
Fa0/10                       notconnect   102          auto   auto 10/100BaseTX
....

show switchport status

SW2#<input>show interfaces fastEthernet 0/10 switchport</input>
Name: Fa0/10
Switchport: Enabled
Administrative Mode: static access
Operational Mode: down
Administrative Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 102 (Students)
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 private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL

Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none

Adding VLAN's

The VLAN configuration is stored in a file named VLAN.DAT 

Switch1#<input>dir</input>
Directory of flash:/

    2  -rwx         128   Mar 26 2007 13:58:48  layout.text
    3  -rwx     2888547   Mar 01 1993 01:16:05  c2950-i6q4l2-mz.121-13.EA1.bin
    5  -rwx         616   Apr 27 2009 12:40:25  vlan.dat
    6  -rwx        1663   Mar 01 1993 00:05:49  config.backup-1.2
    7  drwx         832   Mar 04 1993 23:52:10  html
   21  -rwx         109   Mar 01 1993 00:04:30  info
   22  -rwx         109   Mar 01 1993 00:04:30  info.ver
    8  -rwx        3727   Mar 22 2009 10:12:56  config.text
   24  -rwx         306   Mar 01 1993 00:03:48  env_vars
   25  -rwx      880640   Mar 08 1993 22:39:07  html2.tar
   26  -rwx          47   Mar 22 2009 10:12:56  private-config.text

7741440 bytes total (1981952 bytes free)

Adding VLAN's from configure mode

To add VLAN's from configure mode is recomended. 

Switch1#<input>configure terminal</input>
Enter configuration commands, one per line.  End with CNTL/Z.
Switch1(config)#<input>vlan 100</input>
Switch1(config-vlan)#<input>name Admin</input>
Switch1(config-vlan)#<input>vlan 101</input>
Switch1(config-vlan)#<input>name Sales</input>
Switch1(config-vlan)#<input>vlan 102</input>
Switch1(config-vlan)#<input>name Students</input>
Switch1(config-vlan)#<input>^Z</input>
Switch1#<input>sh vlan brief</input>

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
100  Admin                            active
101  Sales                            active
102  Students                         active
1002 fddi-default                     active
1003 token-ring-default               active
1004 fddinet-default                  active
1005 trnet-default                    active

Seeing the VLAN's in running config

vtp mode transparant

Adding VLAN's from database mode

You can add VLAN's from vlan database 

Switch1#<input>vlan database</input>
% Warning: It is recommended to configure VLAN from config mode,
  as VLAN database mode is being deprecated. Please consult user
  documentation for configuring VTP/VLAN in config mode.
Switch1(vlan)#<input>vlan 100 name Admin</input>
VLAN 100 added:
    Name: Admin
Switch1(vlan)#<input>vlan 101 name Sales</input>
VLAN 101 added:
    Name: Sales
Switch1(vlan)#<input>vlan 102 name Students</input>
VLAN 102 added:
    Name: Students
Switch1(vlan)#<input>exit</input>
APPLY completed.
Exiting....
Switch1#<input>sh vlan brief</input>

LAN 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
100  Admin                            active
101  Sales                            active
102  Students                         active
1002 fddi-default                     active
1003 token-ring-default               active
1004 fddinet-default                  active
1005 trnet-default                    active

Access Ports

Access Ports are ports that are connected to specific vlans.

Adding a port statically to a VLAN

To put fastethernet 0/7 port in VLAN 102, use the following commands. 

Switch1#<input>conf t</input>
Enter configuration commands, one per line.  End with CNTL/Z.
Switch1(config)#<input>interface fastethernet 0/7</input>
Switch1(config-if)#<input>switchport mode access</input>
Switch1(config-if)#<input>switchport access vlan 102</input>

Adding a range of ports to a VLAN

To put fastethernet 0/8, 0/9, 0/10, 0/11, 0/12, 0/13, 0/14 and 0/22 in VLAN 102 

Switch1(config)#<input>interface range fastEthernet 0/8 - 14, fastEthernet 0/22</input>
Switch1(config-if-range)#<input>switchport mode access</input>
Switch1(config-if-range)#<input>switchport access vlan 102</input>

To view ports in VLAN Students 

Switch1#<input>show vlan name Students</input>

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
102  Students                         active    Fa0/7, Fa0/8, Fa0/9, Fa0/10
                                                Fa0/11, Fa0/12, Fa0/13, Fa0/14
                                                Fa0/22, Gi0/2

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
102  enet  100102     1500  -      -      -        -    -        0      0

Remote SPAN VLAN
----------------
Disabled

Primary Secondary Type              Ports
------- --------- ----------------- ------------------------------------------
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