Microsoft KB Archive/162055

= Ipconfig and Winipcfg Display Only One Default Gateway Address =

Article ID: 162055

Article Last Modified on 12/6/2003

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition
 * Microsoft TCP/IP for Windows for Workgroups 3.11
 * Microsoft TCP/IP for Windows for Workgroups 3.11a
 * Microsoft TCP/IP for Windows for Workgroups 3.11b
 * Microsoft Windows 95

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This article was previously published under Q162055





SYMPTOMS
The Ipconfig and Winipcfg tools display only one default gateway address when you have configured the Transmission Control Protocol/Internet Protocol (TCP/IP) to use more than one default gateway.



CAUSE
The Ipconfig and Winipcfg tools can display only the address of the first configured default gateway.



MORE INFORMATION
The following information is a sample of the output from the Ipconfig tool:   Windows NT IP Configuration

Host Name. . . . . . . . . : MYPC DNS Servers. . . . . . . . :     Node Type. . . . . . . . . : Mixed NetBIOS Scope ID. . . . . . :     IP Routing Enabled. . . . . : No     WINS Proxy Enabled. . . . . : No     NetBIOS Resolution Uses DNS : No

Ethernet adapter Elnk31:

Description. . . . . . . . : ELNK3 Ethernet Adapter. Physical Address. . . . . . : 00-C0-4F-D7-DB-91 DHCP Enabled. . . . . . . . : Yes IP Address. . . . . . . . . : 100.50.84.54     Subnet Mask. . . . . . . . : 255.255.248.0     Default Gateway. . . . . . : 100.50.80.1     DHCP Server. . . . . . . . : 100.50.40.9     Primary WINS Server. . . . : 100.50.16.153     Secondary WINS Server. . . : 100.50.16.155     Lease Obtained. . . . . . . : Friday, January 10, 1997 7:29:32 AM     Lease Expires. . . . . . . : Wednesday, January 29, 1997 7:29:32 AM To determine which default gateways have been assigned, you can use the ROUTE command by typing the following line at a command prompt:

route print

The following table is a sample of the output from the ROUTE PRINT command:   Active Routes:

Network Address         Netmask  Gateway Address     Interface  Metric 0.0.0.0         0.0.0.0      100.50.80.2     100.50.84.54    1           0.0.0.0          0.0.0.0      100.50.80.1     100.50.84.54    1         127.0.0.0        255.0.0.0        127.0.0.1        127.0.0.1    1      100.50.41.50  255.255.255.255      100.50.80.2     100.50.84.54    1       100.50.80.0    255.255.248.0     100.50.84.54     100.50.84.54    1      100.50.84.54  255.255.255.255        127.0.0.1        127.0.0.1    1    100.50.255.255  255.255.255.255     100.50.84.54     100.50.84.54    1         224.0.0.0        224.0.0.0     100.50.84.54     100.50.84.54    1   255.255.255.255  255.255.255.255     100.50.84.54     100.50.84.54    1 The lines that have a 0.0.0.0 network address indicate that there are two assigned default gateways. The Tracert utility can be used to find out which default gateway is active.

NOTE: Only one of the default gateways is used for each network adapter. If you assign more than one default gateway address, the second address is used only if the Dead Gateway Detection feature determines that the first gateway is not operational.

For more information about dead gateway detection, see the following articles in the Microsoft Knowledge Base:

159168 Multiple Default Gateways Can Cause Connectivity Problems

128978 Dead Gateway Detection in TCP/IP for Windows NT



STATUS
Microsoft has confirmed this to be a problem in the products listed at the beginning of this article.

Additional query words: tcpip

Keywords: kbnetwork kbprb KB162055

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