I have network address with two routers as shown in the picture if the address 12.12.12.1 is reserved as network address and 12.12.12.3 for the broadcast, how can I give the two routers interfaces addresses? there is only one address available which is 12.12.12.2 enter image description here

up vote 5 down vote accepted

Welcome on this Stack Exchange. You made a small mistake in your IP subnet calculation. In 12.12.12.0/30, the 12.12.12.0 address is the network address, 12.12.12.1 and 12.12.12.2 are assignable to the routers and 12.12.12.3 is the broadcast address.

Please see this question and its answers for a more detailed explanation on IP subnet calculation.

  • thank you , I will , but isn't this address in the picture the network address ? I didn't write it by my self , it is already in the question topology – imad suliman Nov 8 at 20:48
  • 2
    A /30 always has 2 usable addresses. I guess .1 was shown in the picture since that's the IP address of the interface of one of those routers. – Teun Vink Nov 8 at 20:52
  • got it ! thanks alot – imad suliman Nov 8 at 21:30

Your Answer

 
discard

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.