Microsoft KB Archive/227523

= IPSec and IP-to-IP Tunnels Do Not Work with Routing Protocols Such as RIP and OSPF =

Article ID: 227523

Article Last Modified on 2/27/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Datacenter Server

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This article was previously published under Q227523



SYMPTOMS
Routing protocols such as Routing Information Protocol (RIP), RIP version 2, and Open Shortest Path First (OSPF) cannot be used with IP Security (IPSec) or IP-to-IP tunnels.



CAUSE
The routing protocols listed in the "Symptoms" section require a numbered interface to function. Neither IPSec nor IP-to-IP tunnels provide a numbered interface and cannot be used with these protocols



RESOLUTION
If a routing protocol is required for a tunnel, you can use a Layer 2 Tunneling Protocol (L2TP) tunnel with or without IPSec, depending on operational requirements, or a Point-to-Point Tunneling Protocol (PPTP) tunnel. You can use routing protocols with L2TP and PPTP because L2TP and PPTP tunnels provide numbered interfaces.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Additional query words: IPSEC L2TP PPTP Tunneling routing RIP OSPF

Keywords: kbbug kbnetwork kbpending KB227523

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