Router Static or Dynamic IP

[hoadotnguyen]

How do I check to see my router is setting Dynamic or Static IP? Thanks for your respond.

[royalblues]

The sh ip interface would tell you if the address was assigned via DHCP

It would display something like address determined by DHCP

Narayan

[hoadotnguyen]

This is my router 181.

When I go this command. Here is outlook. Would you tell me it is static or diamic.

Do you know why it is showing 255.255.255.255?

Why it is shwoing Address determined by non-volatile memory?

Vlan1 is up, line protocol is up

Internet address is 10.10.10.1/24

Broadcast address is 255.255.255.255

Address determined by non-volatile memory

FastEthernet1 is up, line protocol is up

Internet address is xx.xx.xx.xx/22

Broadcast address is 255.255.255.255

Address determined by DHCP

[royalblues]

The address on the fastethernet is determined via DHCP

FastEthernet1 is up, line protocol is up

Internet address is xx.xx.xx.xx/22

Broadcast address is 255.255.255.255

Address determined by DHCP

The VLAN 1 SVI address is configured on the interface and is static and is shown as address determined by non volatile memory

HTH

Narayan

[hoadotnguyen]

Why Broadcast address is 255.255.255.255? Thanks,

Is there way I can change address determined by on volatile memory to DHCP address?

[Istvan_Rabai]

Hi Hoa,

If you want to change to a DHCP address, you need to configure the interaface as below.

Your static ip address config is something like this:

interface vlan 1

ip address 10.10.10.1 255.255.255.0

Instead of this you need to configure the following:

interface vlan 1

ip address dhcp

You need to make sure that the dhcp server is configured accordingly and is accessible from that interface. Otherwise your interface will not get the respective ip address.

If it doesn't work, you can post your network topology and config, so we can help you configure the dhcp server or the dhcp relay agent if that is necessary.

Cheers:

Istvan