In order to realize non-blocking switching and adding/dropping of wavelengths, the new generation of ROADM nodes are required to be colorless, directionless and contentionless (CDC ROADM).
The following are five types of ROADM structures. The focus is on how they support CDC functions.
Fig.2 shows ROADM structure #1. The NNI is constructed with 1×N WSSs. The number of WSSs for a M-dimensional ROADM is 2M. The figure shows only three dimensions. The UNI includes several add/drop modules (the figure shows only two of them). Each add/drop module has two 1×N WSSs linked back-to-back for signal dropping and a 1×N WSS linked to a power splitter for signal adding. According to the function of 1×N WSS, the ROADM structure can support colorless and directionless add/drop of signals. However, when the dimension of the ROADM node is more than the number of add/drop modules, contention happens at the links in the red circle. Maybe we can add the add/drop modules. But the cost is not cheap. Thus this ROADM structure is defined as a CD ROADM and doesn’t meet the CDC requirement.
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Hello,We have a pair of N3K-3064PQ-10GX and one of them acting as backup and we want to migrate from VyOS to it, we want to add 500x interface vlan and each interface vlan has its own ip/prefixes (for example /30 /29 ...) and we ahve 6-8x BGP session with...
We live in an age that is both thrilling and evolving substantially. A new trend/technology is always on rise even before the preceding has been used to its fullest potential. Although the concepts of digital transformation may seem over discussed, ...
Show CommandPurposeCiscoICX-RuckusShow Spanning tree infoShow spanning-treeshow 802-1wVerify Port-Channel / Link aggregation infosh lag briefsh etherchannel summaryShow CDC/LDP neighbor infoshow cdp neighbors detailsh lldp neighbors de sh mac a...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.