routing group

The shortest paths from routing group A to any other routing group in the topology have been determined.

If the routing engine service is in an unstable state, routing group members may not be able to connect to the routing group master.

If the user's mailbox is in a remote routing group , the message may have to be sent through other connectors .

Sometimes, two or more servers mistake the wrong server as the routing group master.

An administrative group refers to a collection of users with administrative authority and is not confined by routing group boundaries .

Any message size limits that are specified on a routing group connector don't affect the selection of the least cost routing path.

Every five minutes thereafter, the routing group member polls the master to query for up-to-date routing information.

Routing group connectors with local bridgehead servers of any local bridgehead .

Routing next evaluates the cost of the IP site links that must be crossed to reach the first routing group connector.

Use an SMTP connector with a routing group scope if you want to ensure that users in a specific location always use this SMTP connector.

If this server fails or is taken offline, link state information is no longer propagated in the routing group.

The transport that the Routing Group connector uses depends on the bridgehead servers that you select.

The routing group connector must specify a source server and a target server as the connector end points.

Routing group connectors are always available across the whole organization.

The advantage of using delivery restrictions to restrict usage is that this option eliminates the need to create a routing group.

It then adds the closest routing group to the set of routing groups for which the shortest paths have been determined.

Routing group connectors must be configured between the routing groups.

The default and preferred setting is to have the servers in the local routing group send mail using this connector.

Any messages that exceed the maximum message size limit on any routing group connector in the least cost routing path won't be delivered.

It adds the closest routing group to the set of routing groups for which the shortest paths have been determined.

If you do not provide an identity, the command returns configuration details of all routing group connectors.

Routing group masters never accept information about their local routing group from a routing group master in a remote routing group.

The routing group connector can only be used to connect routing groups.

The routing engine also puts the servers together with the GUID of the server's routing group in a server cache in memory.

Members in a routing group have to mutually authenticate with the routing group master to connect.

Exchange View Only Administrator role on the administrative group where the routing group for the virtual server exists.

This modified version does not have server or connector entries, which significantly reduces the size of the routing group object.

Therefore, do not change the routing group master frequently.

The routing group master suppresses this information for up to 10 minutes to prevent connector state fluctuations.

Event ID 961 is logged when a member server fails to authenticate with its routing group master.

Then, discovering any unavailable servers, the routing group master updates members within the routing group.

The time-out value that a store uses when trying to send a backfill request for data that is available in the same Exchange routing group.

This difference equates to a considerable bandwidth saving over routing group connectors.

Nevertheless, administrative and routing group containers always exist in the configuration directory partition.

So, bridgehead servers in other routing groups expect the newly upgraded server to inform them of link state changes in its routing group.

Use the Name parameter to specify the name to assign to the routing group connector.

For more information about routing group connectors, see Message Routing in a Coexistence Environment.

To view the configuration of a specific routing group connector, you must provide the identity of the routing group connector.

Examine all possible routing paths across routing group connectors and select the routing path that has the least total cost.

You can restrict connector use to a particular routing group or schedule the use of a connector.

Use the Identity parameter to specify the name or the GUID of the routing group connector.

When you create a routing group, you designate a group of servers that can communicate directly with one another.

By default, all servers within a routing group can send mail over the routing group connector.

Routing group connectors are one-way routes for outgoing messages, which means that messages travel outbound to the connected routing group.

Exchange Administrator role to the administrative group where the new routing group or connector will exist.

For more information about Exchange Management Shell cmdlets for routing group connectors, see Routing Group Connector Cmdlets.

Exchange 5 . 5 Servers do not make these routing group distinctions and continue to use the site boundary for routing purposes .

This includes all routing groups and their servers, routing group connectors, and connectors to external messaging systems.

Connectors to external messaging systems can be restricted to the local routing group.

This section assumes that you are familiar with routing group topology design and the configuration of messaging connectors.

This equates to a considerable bandwidth saving over routing group connectors.

Only one server is recognized in a routing group as the routing group master.

After three consecutive connection tries , the routing group connector's local bridgehead server is marked as CONN _ NOT _AVAIL.

Deploy the Hub Transport server role and configure routing group connectors, Send connectors, and Receive connectors.

The list of predecessors eventually defines the shortest path from each routing group to the destination routing group.

Exchange 2003 uses routing groups and routing group connectors to determine an intra-organizational routing topology.

This section contains the route to the first hop routing group that can be use to route mail to a remote routing group.

When the routing group master is informed of an update, it overwrites the link state table with the new information.

However, network traffic increases when users access a public folder in a remote routing group.

It then discovers any unavailable servers and updates members within the routing group.

The GUID that is registered in the objectGUID attribute of the routing group object to which the routing information belongs.

The source and target servers are the bridgehead servers for the routing group.

Exchange 2007 SP1 provides supports for configuration of a maximum message size limit on a routing group connector.

This isolated routing group is problematic in a situation as shown in Figure 11. 4.

Also, the version number of the routing group object is incremented.

It also illustrates a topology that uses only a single bridgehead server in each routing group.

It is assumed that the routing topology representing all the paths from one routing group to all other routing groups is a spanning tree.

Situations where, within a routing group, relay mail fails to prevent message transfer agent (MTA) loops within a routing group.

After the message reaches the routing group connector, message transfer to the destination routing group is direct.

When calculating the least cost routing path to an Exchange 2003 or Exchange 2000 routing group, non-SMTP connectors were not considered.

The master incorporates the information into the link state table and notifies all servers in the routing group about the change.

By definition, only users in a specific routing group can use that routing group's connector.

For routing group connectors, the address space type is RG, which stands for a routing group objectGUID.

The figure illustrates an environment that contains an unavailable bridgehead server in routing group E.

As other servers are installed, you can designate another server as the routing group master.

For more information about routing group masters, see "Designating a Routing Group Master" later in this chapter.

The routing group master begins with all servers and connectors marked as unavailable.

In previous versions of Exchange, this routing group is recognized in Exchange System Manager as Exchange Routing Group (DWBGZMFD01QNBJR).

Reassigning the routing group master role can provide relief until the problem is resolved.

Then , the distance value of all routing groups adjacent to routing group A is updated with the cost values of their connectors .

An SMTP connector to the Internet with a routing group scope.

The only remaining neighbor is routing group E, which has a current distance value of 2 .

This enables messages to destinations outside the local routing group to be routed.

Check for deleted routing group masters or servers that no longer exist.

It finds an entry for the home server, and this entry includes the recipient's home routing group GUID.

For more information about the tasks and responsibilities of the routing group master, see the discussion later in this section.

We recommend that you select a bridgehead server that is located in a hub routing group or in a routing group that has many mailboxes.

In a pure Exchange 2007 environment, all servers belong to a single routing group.

The length of time that a store delays before sending a backfill request for data that is not available in the same Exchange routing group.

Be sure to verify that the routing group connectors allow public folder referrals.

This routing group contains all the computers in the organization that are running Exchange 2007.

Placement of Exchange 2007 and earlier versions of Microsoft Exchange in the same routing group is not supported.

At first, the set of routing groups for which the shortest paths from the source routing group have already been determined is empty.

Configure another server in the routing group as the routing group master.

The custom packet is a modified version of the deleted routing group packet.

You should only designate a connected routing group; otherwise, routing will not function correctly.

The routing group connector between Exchange 2007 and Exchange 2003 can be configured to enable public folder referrals.

Whether the member is connected to the routing group master.

All intra-routing group connections require two-way authentication.

Each entry in the server cache is a server FQDN appended by the server's routing group GUID.

Routing group connectors, in which one bridgehead server is an Exchange 5. 5 Server, are never marked as down.

A user in routing group A sends a message to a recipient in routing group E.

Connectors that can transfer messages to a routing group must have a routing group address space that includes the destination group's GUID.

Therefore, the message is transferred to the bridgehead server in routing group B.

Servers in the same routing group have priority over servers in remote Active Directory sites.

Adding a new server to a routing group also represents a user update.

The routing group master determines whether to update the link state table with the information from the OrgInfo packet.

This example assumes that the routing engine chooses routing group D.

If you specify a two-way connector, a reciprocal connector is created in the target routing group.

Displays routing group members as virtual server instances.

When the routing group master is available again, it reconstructs its link state information.

The first routing group connectors are created during installation.

The first set includes all groups for which the shortest path from the source routing group has already been determined.

The remaining servers are also named member nodes or routing group members.

The calculation begins at routing group A because in this example the source is routing group A.

Message delivery within a single routing group is illustrated in the following figure.

Servers in the same routing group have priority over servers in remote routing groups.

The algorithm now picks routing group C, because this routing group has the smallest distance value.

Do not include Exchange 2007 servers and Exchange 2003 or Exchange 2000 servers in the same routing group.

A fax connector with a routing group scope.

This routing group connector is created during installation of the first Exchange 2007 server.

Changing the routing group master represents a major link state change.

All servers in the routing group continue to operate on the earlier information.

Source routing group %1 is the local routing group for a connector with connected routing groups %2 in routing tables with timestamp %3.

In this example, both options have the same total routing group connector cost.

These routing groups then propagate the link state changes to routing group A.

A problem occurs if you now designate an Exchange 5. 5 Server as the bridgehead server for this routing group.

Contains a list of all servers that belong to the routing group and identifies their state.

VS_NOT_STARTED The routing group master establishes a connection to TCP port 691 on the source bridgehead server.

Check for healthy link state propagation within the routing group on port 691.

You can use Routing Group connectors to connect two or more Exchange Server routing groups.

There is no explicit type for routing group connectors.

Exchange 2007 must use this routing group for communication with earlier versions of Exchange.

The first server that is installed into the routing group is automatically designated as the master node or routing group master.

The Exchange Routing Engine service is an intra-routing group link state communication service, instead of a routing engine.

All Exchange Virtual Servers must reside in the same routing group.

This is because the ability to allow or not allow public folder referrals was available only at the routing group connector level.

It is best to specify multiple source and destination bridgeheads for a single routing group connector between two routing groups.

Both bridgehead servers transfer the received OrgInfo packet to their routing group masters.

All Exchange 2007 servers are members of this routing group.

The link state change causes a rerouting event in routing group D.

Routing group membership must consist only of servers installed in the administrative group that is defined with the routing group.

Routing group connectors where one bridgehead server is an Exchange 5. 5 Server.

You can also prevent the routing group master from marking down its connectors by setting the following Registry key.

The routing group connector is created in the routing group of which the source server is a member.

You may have issues when you configure Routing Group connectors if you have not performed the preparation tasks.

In this example, the message is sent to routing group C, because the routing engine randomly chooses this transfer path.

The GUID that is registered in the objectGUID attribute of the server that acts as the routing group master in this routing group.

This event states that a routing group master no longer exists.

Servers in the same routing group can communicate with each other without the use of connectors.

Routing group connectors always have a scope of "Organization. "

If the MD5 values are different, the routing group member processes the OrgInfo packet.

Microsoft Exchange cannot find target bridgehead server %1 for routing group connector %2 in routing tables with timestamp %3.

The distance value of routing group A to itself is zero.

The predecessor is routing group B.

A back link to the routing group of which this MTA is a member.

A value of 1 indicates that the scope is "Routing Group. "

From Site A, the IP site link cost to reach routing group connector A3 is zero, and the cost to reach routing group connector C1 is 20.

The Exchange 2007 servers that are added to your organization are included in the new administrative group and routing group.

What is a routing group and group counter?

This sections contains details about each routing group that exists in the Exchange organization.

In the following figure, the cost of routing group connector 2-3 is changed to 10.

The routing group master sends the whole link state table (that is, the OrgInfo packet) to each routing group member.

A routing group is a collection of servers running Exchange Server that are connected by permanent network links.

The figure shows the routing group connectors from Figure 5. 4 In simplified form, with their default cost values of 1.

For example, the default SMTP virtual server sends messages within a routing group.

For example, you create a major change when you add a new connector to the routing group or change a connector configuration.

This data is communicated to every routing group in the Exchange organization.

The Exchange 2007 routing group includes all Exchange 2007 servers, regardless of the Active Directory site in which they reside.

The routing group connector links the routing group where the Exchange 2003 server resides and the Exchange 2007 routing group.

Remove the routing group connector between the Exchange 2007 routing group and the Exchange 2003 or Exchange 2000 server.

Exchange 2007 must use this routing group to communicate with earlier versions of Exchange Server.

This is not a supported configuration for the Exchange 2007 routing group.

For example, assume that SERVER01 in a routing group named First Routing Group has an FQDN of SERVER01. TailspinToys. Com.

Delete the routing group connectors that connect the Exchange 2003 or Exchange 2000 routing groups and the Exchange 2007 routing group.

You must use a routing group connector to connect the Exchange 2007 routing group to Exchange 2000 or Exchange 2003routing groups.

For more information about administrative and routing group planning, see Planning an Exchange Server 2003 Messaging System.

The routing engine uses the recipient's home routing group GUID to determine how the message must be transferred, as follows

You can configure all servers in the routing group to act as bridgehead servers in one of two ways

This step-by-step article describes how to configure Routing Group connectors to connect routing groups in Exchange Server 2003.

Selecting the number of bridgehead servers in a routing group

The following is a shortened example of a link state table (all except one routing group removed)

After you create the Routing Group connector, configure the settings that you want to use

Only a select few servers in a routing group

Disconnection between routing group member and master

To confirm that the Routing Group connector is working as expected

Content exists on a store in a remote routing group

Conflicts Between Routing Group Masters

The output should reveal all routing group members and the master itself connecting to port 691 on the master node, similar to the following

Routing group connectors with default cost values

Master and subordinate in a routing group

How to Confirm That You Configured the Routing Group Connector Correctly

How to Specify a Remote Bridgehead Server for a Routing Group Connector

Message size limits on routing group connectors

For more information about routing group connectors, see the following topics

Content exists on a store in the local routing group

Is a target bridgehead server for any routing group

Message routing in single routing group

Configuring Routing Group Connectors Between Exchange 2003 and Exchange 2007

Again, two possible routing paths are available to reach Routing Group 2

According to the routing group address definition, the routing engine creates an entry for SERVER01 in the server cache, as follows

All servers in a routing group

Before you create and configure a routing group connector, you should think about the following questions

Before you can implement a Routing Group connector, you must complete the following steps

Two possible routing paths exist to reach Routing Group 2

How to Configure the Routing Group Connector

How to Add the Routing Group Connector

To use the Exchange Management Shell to create a routing group connector

How to Create Routing Group Connectors from Exchange 2007 to Exchange Server 2003

Within a routing group, Exchange Server 2003 updates link state information as follows