I am reviewing an Exchange 2007 environment and discovered that there are two HUB servers. These two servers live in different locations. One is in the data center and the other is in the main office that serves as a smaller data center but also has a fair number of users in it.
I noticed that each there are two Send Connectors and they just so happen to be named the same as the HUB Servers. Each of the Send Connectors has a single source server which is the server by the same name. (I know that the naming has nothing to do with functionality)
In most environments I usually see a Send Connector and then it will have two source servers. That is the way Exchange provides a certain level of HUB Transport redundancy.
So this place is set up this way:
Send Connector 1 Cost 1 -> Source Server HUB 1
Send Connector 2 Cost 10 -> Source Server HUB 2
So the question becomes, if Server HUB 1 goes down(server failure) what happens? Does Exchange automatically start using Send Connector 2.
I guess there may be some value in having the connectors set up this way so that one HUB server is preferred over the other and controlled by the Sender's Cost, but I would still want some level of assurance that the second connector/server combination would be used if the HUB 1 server failed. Does the configuration I have outlined above provide such an assurance?