Using Interface Configuration Mode - Cisco Catalyst 3750-E Software Configuration Manual

Using Interface Configuration Mode

Figure 12-1
172.20.128.1
When the IP services feature set is running on the switch or the stack master, the switch uses two
methods to forward traffic between interfaces: routing and fallback bridging. If the IP base feature set is
on the switch or the stack master, only basic routing (static routing and RIP) is supported. Whenever
possible, to maintain high performance, forwarding is done by the switch hardware. However, only IPv4
packets with Ethernet II encapsulation are routed in hardware. Non-IP traffic and traffic with other
encapsulation methods are fallback-bridged by hardware.
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Using Interface Configuration Mode
The switch supports these interface types:
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You can also configure a range of interfaces (see the
page
To configure a physical interface (port), specify the interface type, stack member number (only
Catalyst 3750-E switches), module number, and switch port number, and enter interface configuration mode.
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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
12-12
Connecting VLANs with the Catalyst 3750-E or 3560-E Switch
with routing enabled
SVI 1
Host A
VLAN 20
The routing function can be enabled on all SVIs and routed ports. The switch routes only IP traffic.
When IP routing protocol parameters and address configuration are added to an SVI or routed port,
any IP traffic received from these ports is routed. For more information, see
"Configuring IP Unicast Routing," Chapter 46, "Configuring IP Multicast Routing,"
Chapter 47, "Configuring MSDP."
Fallback bridging forwards traffic that the switch does not route or traffic belonging to a nonroutable
protocol, such as DECnet. Fallback bridging connects multiple VLANs into one bridge domain by
bridging between two or more SVIs or routed ports. When configuring fallback bridging, you assign
SVIs or routed ports to bridge groups with each SVI or routed port assigned to only one bridge
group. All interfaces in the same group belong to the same bridge domain. For more information,
see Chapter 48, "Configuring Fallback Bridging."
Physical ports—switch ports and routed ports
VLANs—switch virtual interfaces
Port channels—EtherChannel interfaces
12-14).
Type—Gigabit Ethernet (gigabitethernet or gi) for 10/100/1000 Mb/s Ethernet ports, 10-Gigabit
Ethernet (tengigabitethernet or te) for 10,000 Mb/s, or small form-factor pluggable (SFP) module
Gigabit Ethernet interfaces (gigabitethernet or gi).
Layer 3 switch
SVI 2
VLAN 30
"Configuring a Range of Interfaces" section on
Chapter 12 Configuring Interface Characteristics
172.20.129.1
Host B
Chapter 40,
and
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