Following connector’s linkstate is suppressed because it either points to or comes from a leaf RG node.

Details
Product: Exchange
Event ID: 994
Source: MSExchangeTransport
Version: 6.5.6940.0
Component: Microsoft Exchange Transport
Message: Following connector’s linkstate is suppressed because it either points to or comes from a leaf RG node.
   
Explanation

This event is logged when a connector’s link state is suppressed. This event is only logged on servers on which you have set the diagnostic logging level set to Medium or Maximum on the Routing Engine/Service category of the MSExchangeTransport component.

Exchange automatically suppresses a connector’s link state if Exchange determines that it is not needed. The most common cause of link state suppression is when there is only a single path between servers in a leaf routing group. A leaf routing group is a routing group that has zero or one outgoing connectors and zero or one incoming connectors within the Exchange organization. If the same server has one outgoing and one incoming connector, the connectors must be opposite of each other. Because servers in a leaf routing group have only a single path to use for message transport, maintaining link state is not required. Therefore, if a connector points to or comes from a leaf routing group, Exchange will suppress link state changes on that connector.

   
User Action

No user action is required.

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