Examine the configuration on R5. Router R5 do not see any route entries learned from R4; what could be the issue?

Examine the configuration on R5. Router R5 do not see any route entries learned from R4; what could be the issue?
A . HSRP issue between R5 and R4
B . There is an OSPF issue between R5and R4
C . There is a DHCP issue between R5 and R4
D . The distribute-list configured on R5 is blocking route entries
E . The ACL configured on R5 is blocking traffic for the subnets advertised from R4.

View Answer

Answer: C

Explanation:

R5 configuration: ­

int gig0/0

ip address dhcp

This interface not getting dhcp ip address from R4. So even though OSPF configuration was like 0.0.0.0 0.0.0.0 area 0, because this interface does not get correct ip address from DHCP it can’t participate in OSPF.

R4 configuration: ­

ip dhcp exlude address

ip dhcp pool ine

network x.x.x.x x.x.x.x

i think default router command was missing here. not sure but

Int gig0/0

ip address dhcp.

This interface on R4 should have ip address configured on it instead of” ip address dhcp”. Hence its not able to provide dhcp lease address to R5.

R4 also had ospf configured as network 0.0.0.0 0.0.0.0 area 0. So all interface can participate if they are

up and if they have ip address.

But because R5 interface connected to R4 could not obtail correct dhcp ip address from R4 due to DHCP issue they wont form ospf neighborship.

So correct answer is DHCP issue between R5 & R4.