Question

You have configured DHCP on your router. A partial configuration is shown below:

hostname RouterA
!
interface FastEthernet0/0
ip address
speed auto
duplex auto
ip access-group 1 in
!
interface FastEthernet0/1
ip address
speed auto
duplex auto
!
ip dhcp excluded-address
ip dhcp excluded-address
!
ip dhcp pool 0
network

domain-name

dns-server

default-router
!
access-list permit
!

Srv2 is a host connected to the Fa0/1 interface of RouterA. When it boots, it does not receive an IP address from the DHCP service. What should you do?
1) Check if the Fa0/1 interface is configured with the correct IP address
2) Verify if the DHCP pool is configured with the correct network and default gateway
3) Make sure the access-list permit command is applied to the correct interface
4) Check if the DNS server is reachable from the router

Answer 1

To resolve DHCP issues on RouterA, verify that the Fa0/1 interface is configured correctly, check the DHCP pool configuration for the correct network settings, and ensure that access-lists are not blocking DHCP traffic.

Step-by-step explanation:

The issue with the host connected to the Fa0/1 interface not receiving an IP address from the DHCP service can be due to multiple reasons. To troubleshoot, follow these steps:

1. Verify that the Fa0/1 interface on RouterA is up, configured with the correct IP address, and has no issues.
2. Check the DHCP pool configuration to ensure that it includes the correct network, subnet, and default gateway for the hosts.
3. Confirm that the access-list applied on the interfaces (if any) permits DHCP traffic (ports 67 and 68), since an access list could potentially block the necessary DHCP traffic.

Checking if the DNS server is reachable can also help, but this isa typically not the reason a host would fail to obtain an IP address from DHCP.