deploying and managing ip over wdm networks - Index of
deploying and managing ip over wdm networks - Index of
deploying and managing ip over wdm networks - Index of
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232 Deploying <strong>and</strong> Managing IP <strong>over</strong> WDM Networks<br />
S<strong>of</strong>t-permanent <strong>and</strong> switched trails are visible in the management system<br />
<strong>of</strong> the ASTN, whereas permanent trails are visible only in the transport NMS.<br />
In the transport NMS, the transport network trail supporting a s<strong>of</strong>t-permanent<br />
or switched connection will be visible as well. Looking at the pointers in these<br />
trails that point to the OLCs, the transport NMS knows that these trails are<br />
owned by a NNI or a UNI <strong>and</strong> used for an OLC.<br />
The ASTN management system knows only s<strong>of</strong>t-permanent <strong>and</strong> switched<br />
OLCs will be seen. If ports <strong>of</strong> the transport network are reserved by permanent<br />
trails, this will be visible to the ASTN management system as well. It is proposed<br />
that the ASTN management system is allowed to get information about OLCs<br />
<strong>and</strong> to modify or tear them down, independently <strong>of</strong> whether they have been created<br />
by the management system (s<strong>of</strong>tvpermanent) or via the UNI (switched). In<br />
contrast, the UNI can only access OLCs that it has created.<br />
12.4 The Testbed<br />
The project testbed was developed to assess some innovative functionality in<br />
IP/MPLS <strong>over</strong> ASON/GMPLS scenarios. Figure 12.7 shows the testbed architecture<br />
based on an ASON/GMPLS network partitioned in three vendor<br />
domains, respectively the Siemens, TILAB, <strong>and</strong> Tellium domains. The TILAB<br />
domain includes a ring <strong>of</strong> three OADMs <strong>and</strong> OXC connected to the Siemens<br />
domain, which includes two OXCs. A third domain is based on a Tellium<br />
OXC. The client network is based on IP routers provided by CISCO. Two<br />
interworking (via CORBA-based interface) NMSs (developed by T-Systems<br />
Nova <strong>and</strong> TILAB) provide an end-to-end management <strong>of</strong> connections.<br />
This section analyzes the equ<strong>ip</strong>ment used in the testbed <strong>and</strong> the new functionalities<br />
that have been introduced in order to meet the project goals, such as<br />
fast <strong>and</strong> efficient resilience mechanisms at different network layers (IP <strong>and</strong> optical)<br />
<strong>and</strong> automatic switching (CP <strong>and</strong> signaling). Lastly, some test examples are<br />
given, showing how the innovative features can be assessed.<br />
12.4.1 Testbed Equ<strong>ip</strong>ment<br />
This paragraph contains a descr<strong>ip</strong>tion <strong>of</strong> equ<strong>ip</strong>ment used in the testbed. Furthermore,<br />
two applications are installed into the testbed: a computer-aided<br />
design with centralized libraries <strong>and</strong> database accessible from different workstations<br />
<strong>and</strong> a video-<strong>over</strong>-IP distribution application for a real-time conversion<br />
from an IEEE1394 stream (e.g., coming from a digital video camera) to an IP<br />
flow. These two applications show the potential benefits <strong>of</strong> such an environment<br />
for b<strong>and</strong>-consuming applications.
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