IMS version 22.6 & 22.9 > IMS Admin - User Guide 22.6 & 22.9

As part of network inventory, bandwidth details and layering formats are a critical aspect for the enterprise

or company. Having accurate knowledge and information on network components positively affects

decision making processes for present and future requirements i.e., routing decisions, capacity planning,

equipment purchasing, etc.

In IMS the term Speed refers to a type of connection i.e., MPLS, OCH, MicroWave, etc. Other IMS objects

are also related to Speed.

Several tables, later on in this document, describe possible ways in which Speeds can be modelled. The

list is not exhaustive and other factors will always have to be considered i.e., in layering (parent-child

relationships between bandwidths) the question arises as to whether a bandwidth model should be accurate

or near enough.

The answer to that question will always be: what level of network detail do users of the system need. For

example, fault management requirements dictate that alarms and traps need to be associated to an

appropriate network object i.e., optical channel in a WDM core. If only a subset of channelisation is modelled,

then that might not fulfil the requirement to know exactly which object in IMS is affected during a network

outage.

Layering

In IMS the concept of Sub Layer and Carrier Layer is introduced to establish the association of each speed

with others. The Sub Layer is the child to the Carrier Layer.

Some examples

400G, 20GIG I/O, 10GB-Ethernet, OTS, OS80, OCH, ODU, SDI, Jpeg2000, HDI, OC192, 10G, MPLS, V-LAN,

RAN (2,3,4, and 5G), Cable, Sub Sea Cable, Fiber / FTTx / GPON, etc.

Speed and Layering