Cisco Systems 3200 User Manual
C-2
Cisco 3200 Series Router Hardware Reference
OL-5816-10
Appendix C Switch Port Functionality
Port-Based VLAN
Figure C-1
Traditional LAN Segmentation versus VLAN Segmentation
Port-Based VLAN
By default, the 10/100 Fast Ethernet interfaces on the FESMIC are defaulted to Layer 2 switch ports and
all four interfaces belong to VLAN 1. You can partition the switch ports to belong to different VLAN
groups by using the switchport vlan access <vlan-id> command. The following is a brief function
description of a FESMIC port-based VLAN:
all four interfaces belong to VLAN 1. You can partition the switch ports to belong to different VLAN
groups by using the switchport vlan access <vlan-id> command. The following is a brief function
description of a FESMIC port-based VLAN:
•
Each VLAN has its own MAC address table.
•
Packets received are forwarded only to ports that are members of the same VLAN as the receiving
port. VLAN partitions provide hard firewalls for all traffic in different VLANs.
port. VLAN partitions provide hard firewalls for all traffic in different VLANs.
•
A VLAN comes into existence when a user adds a VLAN to the local VLAN database. A maximum
of 32 VLANs are supported. VLAN IDs can range from 1 to 1005.
of 32 VLANs are supported. VLAN IDs can range from 1 to 1005.
•
By default, a spanning tree instance is created for each VLAN.
82632
LAN3
LAN2
LAN1
Shared hub
Floor 1
L2 Switch
L2 Switch
Router
Router
Shared hub
Shared hub
Traditional LAN Segmentation
Virtual LAN Segmentation
Floor 2
Floor 3
VLAN1
VLAN2
VLAN3
L2 Switch