Disadvantages of sonet

Answer 1

The disadvantages of using SONET/ SDH in the metro include: * Fixed circuits. SONET/SDH provisions point-to-point circuits between ring nodes. Each circuit is allocated a fixed amount of bandwidth that is wasted when not used. That fixed allocation puts a limit on the maximum burst traffic data transfer rate between end points. This is a disadvantage for data traffic, which is inherently bursty. * Waste of bandwidth for meshing. Provisioning the circuits necessary to create a logical mesh over a SONET ring is not only difficult, but also results in an inefficient use of ring bandwidth. As the amount of data traffic that stays within metro networks is increasing, a fully meshed network that is easy to deploy, maintain and upgrade is becoming an important requirement. * Multieast traffic. On a SONET/SDH ring, multicast traffic requires each source to allocate a separate circuit for each destination. A separate copy of the packet is sent to each destination. The result is multiple copies of multicast packets traveling around the ring, wasting bandwidth.

Answer 2

Some disadvantages of SONET include high cost of implementation, complexity in network planning and management, and limited flexibility to accommodate newer technologies and increased bandwidth requirements. Additionally, SONET can be difficult to scale and may not be cost-effective for smaller networks.