Create version-2.26.2.md

docs/release-notes/version-2.26.2.md

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+# Topolograph
+
+## v2.26.2 (21.07.2022)
+
+### Enhancements
+* Topolograph builds a topology based on OSPF adjacency and physical connectivity is hidden. But in some cases, we can assume that neighbors share the same media, in some cases - not. For example, if neighbors have a common DR - we assume that they are connected via shared physical media and then we emulate one of the edge failures between such neighbors - we emulate all edges down.  
+##### Mark all shared media links (which have common DR) is enabled  ![shared media mode](https://github.com/Vadims06/topolograph/blob/0c30e982a65dba273e9eaa2d5f0bf5ecc12bd060/docs/release-notes/v2.26.2/networkReactionOnFailure_dr_is_enabled.png "save layout")
+* Network reaction if a link/s goes down on dedicated media.  
+If neighbors do not have DR or they have, but they are only two neighbors on the link, and when we emulate edge failure - we remove the only a single link between two particular neighbors.  
+##### Mark all shared media links (which have common DR) is disabled  ![dedicated media mode](https://github.com/Vadims06/topolograph/blob/0c30e982a65dba273e9eaa2d5f0bf5ecc12bd060/docs/release-notes/v2.26.2/networkReactionOnFailure_dr_is_not_enabled.png "save layout")
+
+## v2.26.1 (14.06.2022)
+
+### Enhancements
+* Asymmetric links counter is added in `Unidirectional and Asymmetric links` report