XCON: Routing Service Port Used by Exchange 2000 (262690)


The information in this article applies to:

  • Microsoft Exchange 2000 Server
This article was previously published under Q262690

SUMMARY

This article describes the routing service port that is used by Exchange 2000 Server.

MORE INFORMATION

Exchange 2000 uses a Link State Algorithm (LSA) routing protocol to propagate routing information throughout the organization. When you change the routing table, this information is immediately sent to all servers in the organization. In a routing group, each server, including the master, listens on TCP/IP port 691 for routing information updates (this port is registered with Internet Assigned Numbers Authority [IANA]). The routing group master broadcasts "changes only" to all servers in its routing group.

When routing information is transferred between routing groups, the information is transferred through the transport protocol that is used (Simple Mail Transfer Protocol [SMTP], X.400). For SMTP, this information transfer is accomplished by using a version of the LSA protocol that works as an extension to SMTP through the Extended Simple Mail Transfer Protocol (ESMTP) framework. In particular, the command verb is X-LINK2STATE.

For additional information about the LSA protocol used by Exchange 2000, click the article number below to view the article in the Microsoft Knowledge Base:

263249 XCON: Link State Routing in Exchange 2000 Server

Modification Type:MinorLast Reviewed:4/25/2005
Keywords:kberrmsg kbinfo KB262690
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