Windows NT IP Router Loses Learned Routes (177656)
The information in this article applies to:
- Microsoft Windows NT Server 3.5
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0
- Microsoft Routing and Remote Access Service Update for Windows NT Server 4.0
This article was previously published under Q177656 SYMPTOMS
Your Windows NT server that is running either Routing Information Protocol
(RIP) for IP or Routing and Remote Access Service (RRAS) may lose its
routing table after a few minutes. There are no event logs or other
messages to indicate a problem.
CAUSE
The other routers with which your Windows NT router is communicating are
sending RIP v1 announcements to the "all zeros" subnet of the network
instead of the "all ones" subnet.
RESOLUTION
To resolve this issue, you will need to configure your other routers to use
an "all ones" broadcast address. Please consult the documentation that came
with your routers for information on how to do this.
MORE INFORMATION
Traditionally the broadcast address to which a RIP v1 router sends its
routing table is the .255, or "all ones" subnet. With a network number of
191.23.107.0 the broadcast address would be 191.23.107.255, assuming normal
subnetting. Some older network operating systems use the .0, or "all
zeros," subnet for their broadcasts and those systems broadcast to an
address that is identical to the network number.
| Modification Type: | Major | Last Reviewed: | 5/14/2003 |
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| Keywords: | kb3rdparty kbinterop kbnetwork kbprb KB177656 kbAudDeveloper |
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