There
is full transparency of service frames within an E-PLAN. This essentially creates a
transparent LAN service that makes the Service Provider network one large Ethernet,
as shown in Figure 2.14.
Ethernet Virtual Private LAN (EVPLAN) Using E-LAN Service Type or Layer 2
VPN Using an E-LAN service over a shared infrastructure, a transparent LAN service
is created. This essentially makes the Service Provider network one large Ethernet
and is typically used for applications such as intra-company connectivity services.
Sample Commercial Offerings Using Carrier Ethernet Services
Some common connectivity services delivered using Carrier Ethernet are briefly outlined
next; higher level applications are increasingly employing Carrier Ethernet due
to the many benefits that it affords.
LAN Extension Subscribers with multiple sites in a metro area often want to interconnect
them at high speeds so all sites appear to be on the same LAN and have equivalent
performance and access to resources such as servers and storage. This is referred to as
LAN extension.
In essence, the LANs at each site are connected; this is simpler and cheaper than
routing, although it may not scale as well in large networks.
Pages:
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236