Cisco Systems OL-16447-01 Manual De Usuario

See the 

 for more 

information about using the SFP module patch cable.

You can order the SFP module patch cable (part number CAB-SFP-50CM=).

The switch supports user-network interfaces (UNIs), network node interfaces (NNIs), and enhanced 
network interfaces (ENIs). UNIs are typically connected to a host, such as customer premises equipment 
(CPE) or a home access gateway. NNIs are typically connected to a router or to another switch. ENIs 
have the same functionality as UNIs, but can be configured to support protocol control packets for 

 

Cisco Discovery Protocol (CDP), Spanning-Tree Protocol (STP), Link Layer Discovery Protocol 
(LLDP), EtherChannel Link Aggregation Control Protocol (LACP), or Port Aggregation Protocol 
(PAgP). Every port is in an UNI, ENI, or NNI mode at any time, but not all ports have to all be set the 
same.

By default, the dual-purpose ports on the Cisco ME 3400E-12CS-M and on the 

 

Cisco ME 3400EG-2CS-A are configured as UNIs, and the SFP-only uplink ports are configured as 
NNIs. You must specifically configure ports to be ENIs; no ports are ENIs by default. By default, the 
10/100 ports on the Cisco ME 3400E-24TS-M are UNIs, and the dual-purpose ports are NNIs.

A port can be reconfigured from UNI to NNI or an ENI, and the reverse. When a port is reconfigured as 
another interface type, it inherits all the characteristics of that interface type. For information on 
configuring interfaces, see the switch software configuration guide.

You can use the switch system and port LEDs to monitor switch activity and performance.