ip address and dhcp

in CCNA & CCENT
Hey!!!
I'm confused with assigning ip addresses with interfaces. I know how to assign them to the interface but I don't understand why my computer thats hooked up to the switch doesn't get an ip address. I thought the interface would have given out ip addreses automatically. The only time is when I get an ip address is when I assign a dhcp address in the global config. Then assign an ip address that is the same ip / mask to that interface. That is when I get ip addresses to the computers. Then only one interface assigns ip addresses and the other doesn't. Would I have to make two different pools for both addresses?
I'm confused with assigning ip addresses with interfaces. I know how to assign them to the interface but I don't understand why my computer thats hooked up to the switch doesn't get an ip address. I thought the interface would have given out ip addreses automatically. The only time is when I get an ip address is when I assign a dhcp address in the global config. Then assign an ip address that is the same ip / mask to that interface. That is when I get ip addresses to the computers. Then only one interface assigns ip addresses and the other doesn't. Would I have to make two different pools for both addresses?
Booya!!
WIP : | CISSP [2018] | CISA [2018] | CAPM [2018] | eCPPT [2018] | CRISC [2019] | TORFL (TRKI) B1 | Learning: | Russian | Farsi |
*****You can fail a test a bunch of times but what matters is that if you fail to give up or not*****
WIP : | CISSP [2018] | CISA [2018] | CAPM [2018] | eCPPT [2018] | CRISC [2019] | TORFL (TRKI) B1 | Learning: | Russian | Farsi |
*****You can fail a test a bunch of times but what matters is that if you fail to give up or not*****
Comments
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captobvious Member Posts: 648
jamesleecoleman wrote: »Hey!!!
I'm confused with assigning ip addresses with interfaces. I know how to assign them to the interface but I don't understand why my computer thats hooked up to the switch doesn't get an ip address. I thought the interface would have given out ip addreses automatically. The only time is when I get an ip address is when I assign a dhcp address in the global config. Then assign an ip address that is the same ip / mask to that interface. That is when I get ip addresses to the computers. Then only one interface assigns ip addresses and the other doesn't. Would I have to make two different pools for both addresses? -
jamesleecoleman Member Posts: 1,899 ■■■■■□□□□□
captobvious wrote: »You're talking about a switch, right? What does a switch do?
Oops sorry!! I ment a router.Booya!!
WIP : | CISSP [2018] | CISA [2018] | CAPM [2018] | eCPPT [2018] | CRISC [2019] | TORFL (TRKI) B1 | Learning: | Russian | Farsi |
*****You can fail a test a bunch of times but what matters is that if you fail to give up or not***** -
elegua Member Posts: 282
jamesleecoleman wrote: »Hey!!!
I'm confused with assigning ip addresses with interfaces. I know how to assign them to the interface but I don't understand why my computer thats hooked up to the switch doesn't get an ip address. I thought the interface would have given out ip addreses automatically. The only time is when I get an ip address is when I assign a dhcp address in the global config. Then assign an ip address that is the same ip / mask to that interface. That is when I get ip addresses to the computers. Then only one interface assigns ip addresses and the other doesn't. Would I have to make two different pools for both addresses?
Are you running a DHCP on the router?, can you please explain a little bit more?, i'm not getting what you are asking. -
jamesleecoleman Member Posts: 1,899 ■■■■■□□□□□
Do I have to run dhcp on the router in order for the pcs on my network to get an ip address or can I just configure an ip addres on the interface and then my pcs get an ip address? I thought if I configured an fa interface with an ip address, on a router then it would automatically give out ip addresses.Booya!!
WIP : | CISSP [2018] | CISA [2018] | CAPM [2018] | eCPPT [2018] | CRISC [2019] | TORFL (TRKI) B1 | Learning: | Russian | Farsi |
*****You can fail a test a bunch of times but what matters is that if you fail to give up or not***** -
elegua Member Posts: 282
jamesleecoleman wrote: »Do I have to run dhcp on the router in order for the pcs on my network to get an ip address or can I just configure an ip addres on the interface and then my pcs get an ip address? I thought if I configured an fa interface with an ip address, on a router then it would automatically give out ip addresses.
Yes, you have to run DHCP in your router;
This is assuming that you're using a cisco router:Router-----Switch-----PC's
If you want that all PCs in your network got an IP you have to run the service in the router unless you are running a DHCP server:
config mode:service dhcp
Then you have to create the pools:
Ex:ip dhcp pool MyNETWORK import all network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 dns-server 4.2.2.2 lease 2 update arp
If you want to assign static IPs to any PC then try this:ip dhcp pool MyPC host 192.168.1.5 255.255.255.0 client-identifier 01XX.XXXX.XXXX.XX lease infinite
XX.XXXX.XXXX.XX will be your Mac Address.
If you want to exclude some IPs then try this:ip dhcp excluded-address 192.168.1.1 192.168.1.5
If you have this and still your PC's don't get an IP address then try some sh cmds to verify:sh ip dhcp binding
This will tell you if your DHCP is assigning IPs
Hope this help.