Cisco 3200 Series Hardware Reference

C-4
Cisco 3200 Series Router Hardware Reference
OL-5816-10
Appendix C Switch Port Functionality
Inter-VLAN Routing
Figure C-3 802.1Q Tag Format in an Ethernet Frame
Inter-VLAN Routing
In a VLAN network, traffic and stations for multiple network layer subnets (VLANs) can coexist on a
single physical LAN segment. In practice, a single VLAN corresponds to a network subnet, and a VLAN
trunking capable router is required to forward traffic from a first VLAN to a second VLAN for a Layer
2
switch.
The FESMIC enables the Cisco 3200 Series router to become one of first IOS Ethernet switching routers
to deliver intelligent Layer
2 switching capability and Layer 3 inter-VLAN routing in a single box
solution, as shown in
Figure C-4
Figure C-4 Switching Router Network Topology
82634
Len/Etype
Len/Etype
Data
Data
Tagged
Frame
Original
Frame
FCS
FCS
SrcDest
SrcDest Etype
Etype
Token-Ring Encapsulation Flag
VLAN-ID
VLAN-ID and
TR encapsulation are
802.IQ, not 802.IP.
Ta g
82635
Floor 1
Switching
Router
Switching
Router
Switching
Router
L2 Switch
L2 Switch
Router
Floor 2
Floor 3
Floor 1
Floor 2
Floor 3
VLAN1 VLAN2 VLAN3
VLAN1 VLAN2 VLAN3
L2 Switch
Traditional Switch and Router Topology. Switching Router Topology.

Cisco 3200 Series Specifications

General

Connectivity Technology	Wired
QoS Support	Yes
Operating System	Cisco IOS
Routing Protocols	BGP
Security	Firewall, VPN, ACLs
Management	SNMP, Telnet, CLI
Operating Temperature	32 °F - 104 °F
Product Type	Router
Data Link Protocol	Ethernet, Fast Ethernet
Features	VPN support, QoS
Product Family	3200
Category	Routers
LAN Interfaces	Fast Ethernet, Gigabit Ethernet