I am setting up a router for an MPLS migration and I gave my provider a list of /30 address. They assigned me the subnet address for my CE routers. I am getting bad mask when I try to add the ip address 192.168.1.40/30. I am running 12.4.11T on my 2811 ISR. Shouldn't this work? I have verify ip subnet-zero and ip classless are there? Is this a bug?
There is not IP addressing rule to use /31.
We CANNOT USE /31 as a Subnet. at leaset 2 Bit are required for subnet. THAT IS THE RULE.
If you can count.... subnetting for host.
1111 1111.1111 1111.1111 1111.1111 1110 mean /31 corect..
do for host 2 to power 1 = 2 - 2 (For subnet and broadcast ID)= 0 (NO HOST REMAINS).