Cisco Systems Cisco ME 3400 Manual De Usuario
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Cisco ME 3400 Ethernet Access Switch Hardware Installation Guide
OL-7677-04
Chapter 1 Product Overview
Front Panel Description
10/100 Ports (Only the Cisco ME-3400-24TS Switches)
You can set the 10/100 ports on the Cisco ME 3400-24TS switches to operate in any combination of
half duplex, full duplex, or 10 or 100 Mb/s. You can set the ports for speed and duplex autonegotiation,
in compliance with IEEE 802.3ab. The default setting is autonegotiate.
half duplex, full duplex, or 10 or 100 Mb/s. You can set the ports for speed and duplex autonegotiation,
in compliance with IEEE 802.3ab. The default setting is autonegotiate.
When set for autonegotiation, the port senses the speed and duplex settings of the attached device and
advertises its own capabilities. If the connected device also supports autonegotiation, the switch port
negotiates the best connection (the fastest line speed that both devices support and full-duplex
transmission if the attached device supports it) and configures itself accordingly. In all cases, the
attached device must be within 328 feet (100 meters).
advertises its own capabilities. If the connected device also supports autonegotiation, the switch port
negotiates the best connection (the fastest line speed that both devices support and full-duplex
transmission if the attached device supports it) and configures itself accordingly. In all cases, the
attached device must be within 328 feet (100 meters).
User-network interfaces (UNIs) and network node interfaces (NNIs) are supported on the Cisco ME
switches. UNIs are typically connected to a host, such as a PC or a Cisco IP phone. NNIs are typically
connected to a router or to another switch. By default, the 10/100 ports on the Cisco ME switch are
configured as UNIs.
switches. UNIs are typically connected to a host, such as a PC or a Cisco IP phone. NNIs are typically
connected to a router or to another switch. By default, the 10/100 ports on the Cisco ME switch are
configured as UNIs.
A port can be reconfigured from UNI to NNI and the reverse. When a port is reconfigured as another
interface type, it inherits all the characteristics of that interface type. All ports on the Cisco ME switch
are either UNI or NNI at any time.
interface type, it inherits all the characteristics of that interface type. All ports on the Cisco ME switch
are either UNI or NNI at any time.
For information on configuring interfaces, see the software configuration guide.
Dual-Purpose Ports (Only the Cisco ME 3400G-12CS and Cisco ME 3400G-2CS
Switches)
Switches)
You can configure the dual-purpose ports on the Cisco ME 3400G-12CS switches and the
Cisco ME 3400G-2CS switches as either 10/100/1000 ports or as SFP module ports.
Cisco ME 3400G-2CS switches as either 10/100/1000 ports or as SFP module ports.
You can set the 10/100/1000 ports to autonegotiate. You can also configure them as fixed 10, 100, or
1000 Mb/s (Gigabit) Ethernet ports.
1000 Mb/s (Gigabit) Ethernet ports.
The switch dynamically selects the media type for each dual port (10/100/1000BASE-T or SFP). When
a link is achieved on one media type, the switch disables the other media type until the active link goes
down. If links are active on both media, the SFP module port has priority. You cannot configure this
priority.
a link is achieved on one media type, the switch disables the other media type until the active link goes
down. If links are active on both media, the SFP module port has priority. You cannot configure this
priority.
UNIs and NNIs are supported on the dual-purpose ports. UNIs are typically connected to a host, such as
a PC or a Cisco IP phone. NNIs are typically connected to a router or to another switch. By default, the
dual-purpose ports are UNIs. A port can be reconfigured from UNI to NNI and the reverse. When a port
is reconfigured as another interface type, it inherits all the characteristics of that interface type. All ports
on the Cisco ME switch are either UNI or NNI at any time.
a PC or a Cisco IP phone. NNIs are typically connected to a router or to another switch. By default, the
dual-purpose ports are UNIs. A port can be reconfigured from UNI to NNI and the reverse. When a port
is reconfigured as another interface type, it inherits all the characteristics of that interface type. All ports
on the Cisco ME switch are either UNI or NNI at any time.
You can configure the speed and duplex settings consistent with the selected media type.
For information on configuring interfaces, see the software configuration guide.