1

i have the network topology in the diagram below. i was given the Internal address block of 100.1.0.0 for assigning IP addresses.

Topology Diagram

Router 1 has a public ip address to the ISP

router 2 i assigned it the network 100.1.7.0/24 which allows enough space for the 204 hosts

router 3 i assigned it the network 100.1.8.0/26 which allows enough space for the 50 hosts

router 4 connected to r1 and frame relay.

router 6 i assigned it the 4 networks 100.1.6.0/26, 100.1.6.64/26, 100.1.6.128/64, 100.1.6.192/64 which allows enough space for the 4 * 44 hosts networks.

router 5 i assigned it the 6 networks 100.1.0.0/24, 100.1.1.0/24, 100.1.2.0/24 - 100.1.5.0/24 which allows enough space for the 6 * 210 hosts networks.

my question is what ip addresses should i assign the serial ports of r1 - r2, r1 - r3, r1 - r4, etc. should i use another network(100.1.9.0) or use up free addresses in lets say the 100.1.8.0 block like 100.1.8.64/30, 100.1.8.68/30, 100.1.8.72/30 ?

what is good practice in this situation as i will be summarize the addresses for smaller routing tables.

the routing protocol i will be using will be OSPF.

R1 will be implementing Nat.

thanks

  • 1
    100.1.0.0 is not a private network address – hertitu Nov 9 '16 at 16:27
  • i know but thats what we were given for the internal IP address of our assignment – Swannie Nov 12 '16 at 16:38
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For point-to-point links, use a maximum size of /30. Depending on your model of router, it may support a subnet size of /31 which would be even better. Carve these small subnets out of your unused space. You can reserve a /24 network and use it only for p2p links, then take your smaller /30 /31 subnets from this space.

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