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+# Topolograph
+
+## v2.32 (24.06.2023)
+
+## New features
+* Extreme OSPF support is added
+* Ericsson OSPF support is added
+* Yaml based topology. Network design mode.
+
+# Yaml based topology
+Topolograph visualizes topologies based on OSPF/IS-IS LSDB files, but starting from v2.32 it accepts YAML to build a graph. It can be used for building arbitrary topologies (not exactly IGP domains), but moreover it can keep the topology updated via Rest API. It's the first version of Network Diagram as a Service (NDAS)!  
+OSPF/IS-IS LSDB <-> YAML is interchangeable now in both ways, so it allows to make a design of IGP domain from the scratch or based on uploaded a LSDB, add new links/edges between nodes or change igp's cost and then check network reaction based on our changes.
+### Basic YAML based topology.
+Build a graph with defined `nodes` and `edges`. 
+![https://user-images.githubusercontent.com/20796986/144145217-454c1442-ba6c-4337-a6f2-8dde5d337f1e.png](https://github.com/Vadims06/topolograph/blob/6f042dd08cba67c7c5191e16c87ff8679fb179eb/docs/release-notes/v2.32/basic_yaml_diagram.PNG)  
+
+### Node attributes
+* `node's name` is mandatory. Should be in IP-address format. To change it to any other value - use `label`
+* Tags of node are optional. Any key (type string): value (str, int, float, dictionary, list) pairs.
+![image](https://github.com/Vadims06/topolograph/blob/6f042dd08cba67c7c5191e16c87ff8679fb179eb/docs/release-notes/v2.32/node_attributes_yaml_file_and_api_request.png)   
+There is a graph with 6 nodes. Select all primary nodes (`ha_role`: `primary`) in the first DC (`dc1`)
+```
+import requests
+from pprint import pprint as pp
+query_params = {'location': 'dc1', 'ha_role': 'primary'}                                  
+r_get = requests.get(f'http://{TOPOLOGRAPH_HOST}:{TOPOLOGRAPH_PORT}/api/diagram/{graph_time}/nodes', auth=('   ', '    '), params=query_params, timeout=(5, 30))
+```
+Reply
+```
+pp(r_get.json())
+[{'ha_role': 'primary',
+  'id': 1,
+  'label': '10.10.10.2',
+  'location': 'dc1',
+  'name': '10.10.10.2',
+  'size': 15}]
+```
+### Edge attributes
+* `src`, `dst` is mandatory. 
+* `cost` is optional. Default is 1. Equal to OSPF/IS-IS cost.
+* `directed` is optional. Default is false.
+* Tags of edge are optional. Any key (type string): value (str, int, float, dictionary, list) pairs.
+![image](https://github.com/Vadims06/topolograph/blob/6f042dd08cba67c7c5191e16c87ff8679fb179eb/docs/release-notes/v2.32/edge_attributes_yaml_file_and_api_request.PNG)   
+Select all edges over verizon ISP between `10.10.10.2` and `10.10.10.4`  
+```
+query_params = {'src_node': '10.10.10.2', 'dst_node': '10.10.10.4', 'isp': 'verizon'}
+r_get = requests.get(f'http://{TOPOLOGRAPH_HOST}:{TOPOLOGRAPH_PORT}/api/diagram/{graph_time}/edges', auth=('   ', '    '), params=query_params, timeout=(5, 30))
+```
+Reply
+```
+pp(r_get.json())                                                                          
+[{'bw': 1000,
+  'cost': 1,
+  'dst': '10.10.10.4',
+  'id': 3,
+  'isp': 'verizon',
+  'media': 'fiber',
+```
+### Network reaction on adding new link between devices.
+Let's add a new link with `cost` 1 between R3 (10.10.10.3) and R4 (10.10.10.4) device and see how network will react on it.
+![image](https://github.com/Vadims06/topolograph/blob/6f042dd08cba67c7c5191e16c87ff8679fb179eb/docs/release-notes/v2.32/yaml_diagram_network_reaction_on_adding_r3_r4.PNG)
+Obviously, we see traffic increase on direct link R3<->R4 and traffic decrease to R2 (10.10.10.2) and R5 (10.10.10.5).