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Router want more than 8 ports? (Packet Tracer) (Student :)

5oZ98ZS9
Level 1
Level 1

‎02-14-2022 11:37 AM

Hi, Hope I'm in the right section.

 

For my college project I want to subnet my network into 16 with subnet mask 255.255.255.240 i.e /28

but as far as I know the max ports on a router is 8?

So I'm kind of stuck

 

I tried using two routers and then static forwarding but I'm on the same subnet mask and it didn't seem to like it so what options do I have.

 

Basically for my college project I want my network split into 16 using subnet mask 255.255.255.240 but router only has 8 ports.

 

Any help guys please

 

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4 Replies 4

Flavio Miranda
VIP
VIP

‎02-14-2022 11:50 AM

Hi

 Dont follow but let´s see if I can help you.  When you say " I want my network split into 16 using subnet mask 255.255.255.240 " you propably means that you are going to have 16 hosts on the network?  Or do you mean, 16 networks ?

Either way, this is easy to solve by adding a switch on your topology.  Use trunk between switch and router and that way you need only one port on the router.

5oZ98ZS9
Level 1
Level 1

‎02-14-2022 12:07 PM

Hi thanks for your reply

Hi not 16 hosts I'm subnetting - 16 networks using subnet mask 255.255.255.240

https://www.calculator.net/ip-subnet-calculator.html?cclass=any&csubnet=28&cip=192.168.0.0&ctype=ipv4&printit=0&x=72&y=13

192.168.0.0192.168.0.1 - 192.168.0.14192.168.0.15
192.168.0.16192.168.0.17 - 192.168.0.30192.168.0.31
192.168.0.32192.168.0.33 - 192.168.0.46192.168.0.47
192.168.0.48192.168.0.49 - 192.168.0.62192.168.0.63
192.168.0.64192.168.0.65 - 192.168.0.78192.168.0.79
192.168.0.80192.168.0.81 - 192.168.0.94192.168.0.95
192.168.0.96192.168.0.97 - 192.168.0.110192.168.0.111
192.168.0.112192.168.0.113 - 192.168.0.126192.168.0.127
192.168.0.128192.168.0.129 - 192.168.0.142192.168.0.143
192.168.0.144192.168.0.145 - 192.168.0.158192.168.0.159
192.168.0.160192.168.0.161 - 192.168.0.174192.168.0.175
192.168.0.176192.168.0.177 - 192.168.0.190192.168.0.191
192.168.0.192192.168.0.193 - 192.168.0.206192.168.0.207
192.168.0.208192.168.0.209 - 192.168.0.222192.168.0.223
192.168.0.224192.168.0.225 - 192.168.0.238192.168.0.239
192.168.0.240192.168.0.241 - 192.168.0.254192.168.0.255

 

So I have 16 default gateways to set etc If I had a 16 port Router that would be easy but I only have max 8 ports.

0 Helpful

Georg Pauwen
VIP
VIP
In response to 5oZ98ZS9

‎02-14-2022 12:26 PM

Hello,

 

one way to get as many routed interfaces as you want is by configuring subinterfaces on the a router. Simply connect a switch to a router, and configure it like below:

 

Switch

 

interface FastEthernet0/1
description Uplink to Router GigabitEthernet0/0
switchport mode trunk

 

Router

 

interface GigabitEthernet0/0
ip address 192.168.0.1 255.255.255.240
duplex auto
speed auto
!
interface GigabitEthernet0/0.2
encapsulation dot1Q 2
ip address 192.168.0.17 255.255.255.240
!
interface GigabitEthernet0/0.3
encapsulation dot1Q 3
ip address 192.168.0.33 255.255.255.240
!
interface GigabitEthernet0/0.4
encapsulation dot1Q 4
ip address 192.168.0.49 255.255.255.240
!
interface GigabitEthernet0/0.5
encapsulation dot1Q 5
ip address 192.168.0.65 255.255.255.240
!
interface GigabitEthernet0/0.6
encapsulation dot1Q 6
ip address 192.168.0.81 255.255.255.240
!
interface GigabitEthernet0/0.7
encapsulation dot1Q 7
ip address 192.168.0.97 255.255.255.240
!
interface GigabitEthernet0/0.8
encapsulation dot1Q 8
ip address 192.168.0.113 255.255.255.240
!
interface GigabitEthernet0/0.9
encapsulation dot1Q 9
ip address 192.168.0.129 255.255.255.240
!
interface GigabitEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.0.145 255.255.255.240
!
interface GigabitEthernet0/0.11
encapsulation dot1Q 11
ip address 192.168.0.161 255.255.255.240
!
interface GigabitEthernet0/0.12
encapsulation dot1Q 12
ip address 192.168.0.177 255.255.255.240
!
interface GigabitEthernet0/0.13
encapsulation dot1Q 13
ip address 192.168.0.193 255.255.255.240
!
interface GigabitEthernet0/0.14
encapsulation dot1Q 14
ip address 192.168.0.209 255.255.255.240
!
interface GigabitEthernet0/0.15
encapsulation dot1Q 15
ip address 192.168.0.225 255.255.255.240
!
interface GigabitEthernet0/0.16
encapsulation dot1Q 16
ip address 192.168.0.241 255.255.255.240

5oZ98ZS9
Level 1
Level 1
In response to Georg Pauwen

‎02-14-2022 12:32 PM

Thanks for your Reply - this looks just what I'm looking for.

I'll try it out 

Thanks again

0 Helpful
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