Err Msg: The Route Addition Failed: 87
This article was previously published under Q151795
This article has been archived. It is offered "as is" and will no longer be updated.
After you run a ROUTE ADD command, the following error message may appear:
The route addition failed: 87This message alerts you that you have an addressing problem.
The route addition error message appears in at least these two situations:
- The gateway address you specify is not on the same logical subnet as any of the network adapters in your system. For example, if your computer has the following configuration and you use the route add 22.214.171.124 126.96.36.199 command, you receive the error message because the gateway is not on the same logical subnet as your computer:ip address 188.8.131.52In this example, 184.108.40.206 is the remote subnet you want to reach, and 220.127.116.11 is the gateway address you want to use.
subnet mask 255.255.0.0
- The destination address you enter is a specific host address instead of a subnet address and you specify a netmask.
For example, using the same configuration as the first example, if you wanted to reach the following specific computer, you might use the route add 18.104.22.168 mask 255.255.0.0 22.214.171.124 command:ip address:126.96.36.199This command would give you the error 87 message. The ROUTE command expects the subnet address 188.8.131.52 instead of the specific destination address.
subnet mask: 255.255.0.0
valid local gateway: 184.108.40.206
To correctly add a host route, do not specify a netmask. By default, Windows will use a netmask of 255.255.255.255. For example:route add 220.127.116.11 18.104.22.168Or use a subnet mask of all 1s (ones), 255.255.255.255. For example:route add 22.214.171.124 MASK 255.255.255.255 126.96.36.199The mask of all 255s (all 1s) means that the destination address of the packet to be routed must exactly match the Network Address for this route to be used.
Article ID: 151795 - Last Review: 12/04/2015 14:50:38 - Revision: 3.2
Microsoft Windows 2000 Server, Microsoft Windows 2000 Advanced Server, Microsoft Windows 2000 Professional Edition, Microsoft Windows 2000 Datacenter Server, Microsoft Windows NT Server 4.0 Standard Edition, Microsoft Windows NT Workstation 4.0 Developer Edition, Microsoft Windows NT Server 3.51, Microsoft Windows NT Workstation 3.51, Microsoft Windows NT Server 3.5, Microsoft Windows NT Workstation 3.5
- kbnosurvey kbarchive KB151795