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Enable ICMP router discovery

Updated: January 21, 2005

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

To enable ICMP router discovery

  1. Open Routing and Remote Access.

  2. In the console tree, click General.


    • Routing and Remote Access/server name/IP Routing/General

  3. In the details pane, right-click the interface you want to enable, and then click Properties.

  4. On the General tab, select the Enable router discovery advertisements check box.

  5. In Advertisement lifetime (minutes), type or select the time after which a router is considered down after hearing its last router advertisement.

  6. In Minimum time (minutes), type or select the minimum rate at which the router periodically sends ICMP router advertisements.

  7. In Maximum time (minutes), type or select the maximum rate at which the router periodically sends ICMP router advertisements.

    Based on the values of minimum time and maximum time, the router sends periodic ICMP router advertisements between the minimum and maximum times.

  8. In Level of preference, type or select the level of preference for this router to be a default gateway for hosts.


  • To perform this procedure, you must be a member of the Administrators group. As a security best practice, consider using the Run As command rather than logging on with administrative credentials. If you have logged on with administrative credentials, you can also open Routing and Remote Access by clicking Start, clicking Control Panel, double-clicking Administrative Tools, and then double-clicking Routing and Remote Access. For more information, see Default local groups, Default groups, and Using Run as.

Information about functional differences

  • Your server might function differently based on the version and edition of the operating system that is installed, your account permissions, and your menu settings. For more information, see Viewing Help on the Web.

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