CCNA Complete Guide 2nd Edition.pdf - Cisco Learning Home

- VTP configuration on SW2:
SW2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SW2(config)#int fa0/12
SW2(config-if)#switchport trunk encapsulation dot1q
SW2(config-if)#switchport mode trunk
SW2(config-if)#no shut
SW2(config-if)#exit
SW2(config)#vtp mode client
Setting device to VTP CLIENT mode.
SW2(config)#vtp domain building01
Changing VTP domain name from NULL to building01
SW2(config)#vtp password pass123
Setting device VLAN database password to pass123
SW2(config)#vlan 4
VTP VLAN configuration not allowed when device is in CLIENT mode.
SW2(config)#no vlan 3
VTP VLAN configuration not allowed when device is in CLIENT mode.
SW2(config)#int fa0/5
SW2(config-if)#spanning-tree portfast
SW2(config-if)#switchport mode access
SW2(config-if)#switchport access vlan 2
SW2(config-if)#^Z
SW2#
- Verify the VTP configuration on SW2 with the sh vlan and sh int fa0/12 switchport
commands. Verify PC1 and PC2 (in the same VLAN) communication with the ping command.
- Below lists the 2 types of VLAN membership:
Static VLANs Dynamic VLANs
- The most usual and secure way of creating - Automatically determines the VLAN
VLANs by manual configuration of
assignment for an end system based on the
VLAN assignment.
MAC address.
- A switch port always maintains its VLAN - Easier management and configuration –
association.
switches will correctly assign the
- Works well in networks with minimal appropriate VLAN for moved end systems.
user movement.
- VLAN Management Policy Server
(VMPS) is being used for setting up a
MAC-address-to-VLAN mapping database.
Note: Catalyst 4500 and 6500 switches can be configured as a VMPS.
- Below lists the 2 types of links in switched networks:
Access links Belongs to only one VLAN at a time and only allow a single VLAN to be used
across the link (directly connected hosts are communicating in one VLAN
only). VLAN information associated to a frame is removed before the frame is
being forwarded out an access link. Hence hosts are unaware of the usage of
VLAN and are just assume in a broadcast domain. Connecting hosts and hubs.
Trunk links Can be part of multiple VLANs at a time and able to carry traffic for multiple
VLANs when VLANs span across multiple switches. They are point-to-point
links between 2 switches, switch-router, or switch-host. They are not shown in
the output of show vlan EXEC command. The term trunk was inspired by
the telephone system trunks which carry multiple conversations at a time.
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Copyright © 2008 Yap Chin Hoong
yapchinhoong@hotmail.com