Routers are running HSRP for redundancy.The problem happens every time I change some wiring in the star network, ultimately affects the stability of the ring network and stopping some circuits.
Can you post some more detail on the layer 2 domain you are having issue with? It doesn't look like a star or ring topology in your diagram.
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Some quick questions...
- Which device is th root bridge?
- is there a connection between the primary and secondary routers on each side?
- can you paste you HSRP configs. for each device?
- Are both primary and secondary routers connected to the corporate network via dot1q trunk? If not, please provide details.