METROETHERNET
A metropolitan-area Ethernet, Ethernet MAN, or metro Ethernet network is a metropolitan area network (MAN) that is based on Ethernetstandards.
Businesses can also use
metropolitan-area Ethernet to connect their own offices to each other.
Advantages
·
An Ethernet interface is much less expensive
·
Ethernet also supports high bandwidths with fine granularity
·
Ethernet-based access network is that it can be easily connected to the
customer network, due to the prevalent use of Ethernet in corporate and, more
recently, residential networks.
ME 3400 ,catalyst 3750 , ME3800X, ME 4900,
Metro Ethernet
(ME) Classification
1. Point-to-point (PtP)
a.
A single point-to-point Ethernet circuit provisioned between two User
Network Interfaces (UNIs).
b.
Also referred as Ethernet Line Service Type (E-Line)
2. Multipoint-to-multipoint (MPtMP)
a.
A single multipoint-to-multipoint Ethernet circuit provisioned between
two or more UNIs.
b.
Also referred as Ethernet LAN
Service Type (E-LAN)
Within these two service types,
Metro Ethernet services can be created by assigning values to a set of attributes grouped according to the
following:
} User Node Interface (UNI)
} Network Node Interface (NNI)
} Ethernet virtual connection (EVC)
Ethernet
virtual connection (EVC)
- Association of two or
more UNIs that limits the exchange of service frames to UNIs within the
EVC.
User
Node Interface (UNI)
- By default, UNI
interface is in shutdown status, this you can use for access ports and all
UNI interfaces even they are in the same VLAN but cannot access with each
other.
Network
Node Interface (UNI)
- By default, NNI
interface is in no shutdown status.
- NNI port you can use
for trunk ports, It use to connect two switches.
- NNI can communicate
with UNI, NNI can communicate with NNI too.
