overlaping

[ybakala8744452435]

I am trying to do a lab in Packet T and i get the following error.

RB(config)#int g0/1

RB(config-if)#ip address 192.168.20.66 255.255.255.0

RB(config-if)#ipv6 address 2001:DB8:ABCD:4::1/64

RB(config-if)#no shut

RB(config)#int g0/0

RB(config-if)#ip address 192.168.20.2 255.255.255.0

% 192.168.20.0 overlaps with GigabitEthernet0/1

RB(config-if)#ipv6 address 2001:DB8:ABCD:3::1/64

RB(config-if)#no shut

% 192.168.20.0 overlaps with GigabitEthernet0/1

GigabitEthernet0/0: incorrect IP address assignment

feel confuse...

[harmesh88 · Accepted solution]

Dear ,

This is expected behavior , Becuase when you are assigning ip address to interface it must be in different subnet from existing assigned ip address to other interface .

So you are goint to assing ip address from 192.168.20.0/24 subnet you should use different subnet other wise split this subnet in two part

Like 192.168.20.0/25   and 192.168.20.128/25  - networks

I hope you will understood my answer .

Regards,

Harmesh Yadav 

[ybakala8744452435 · Accepted solution]

should I assign an another subnet mask? i do not get it

[harmesh88 · Accepted solution]

Dear ,

I am telling you that subnet should be different when you assigning Ip address on interface . in other term network should be different .

1. 192.168.20.0/25  sub mask 255.255.255.128 usable IP 192.168.20.1 to 192.168.20.126

2. 192.168.20.128/25 sub mask 255.255.255.128   usable IP 192.168.20.129 to 192.168.20.254

I hope you understood .