#ip route

boxerboy1168

I've been trying to figure this out for a while now and I'm basically stuck it's not making sense and none of my material has an answer for me.

Here is my configuration...

SW1-
(#show ip int br)
Vlan2 10.0.0.2 YES manual up up
Vlan3 20.0.0.2 YES manual up up

Trunk configuration -

interface GigabitEthernet0/1
switchport trunk allowed vlan 2-3
switchport mode trunk

(#show run)
interface FastEthernet0/1
switchport access vlan 2
switchport mode access
!
interface FastEthernet0/2
switchport access vlan 3
switchport mode access


interface GigabitEthernet0/1
switchport trunk allowed vlan 2-3
switchport mode trunk
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
interface Vlan2
mac-address 00d0.ffcd.1b02
ip address 10.0.0.2 255.0.0.0
!
interface Vlan3
mac-address 00d0.ffcd.1b01
ip address 20.0.0.2 255.0.0.0

---

R1 -
(#show ip int br)
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 unassigned YES unset up up
GigabitEthernet0/0.2 10.0.0.3 YES manual up up
GigabitEthernet0/0.3 20.0.0.3 YES manual up up
GigabitEthernet0/1 unassigned YES unset up down
Vlan1 unassigned YES unset administratively down down


Host IP -

H1 -
10.0.0.10 255.0.0.0

H2-
20.0.0.20 255.0.0.0

On the router this is #show ip route output -

Gateway of last resort is not set


10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.0.0.0/8 is directly connected, GigabitEthernet0/0.2
L 10.0.0.3/32 is directly connected, GigabitEthernet0/0.2
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.0.0.0/8 is directly connected, GigabitEthernet0/0.3
L 20.0.0.3/32 is directly connected, GigabitEthernet0/0.3

Ok. So, I may not have the proper IP address scheme setup so that is 1 area I need more guidance apparently. When I configure the VLAN do I assign the vlan IP address the network address of 20.0.0.0 255.0.0.0 or do I assign the VLAN IP address a usable address such as 20.0.0.3 255.0.0.0??

When I assign the IP address to the sub interfaces obviously I am suppose to assign a usable IP address correct?

When I try to -


Router(config)#ip route 10.0.0.3 255.0.0.0 20.0.0.3

I get -


%Inconsistent address and mask

What does that mean?

Can someone help me out here?

TechGuru80

Well you are saying ip route 10.0.0.3 255.0.0.0...change it to 10.0.0.0 255.0.0.0.

You are giving a specific IP with a network where it should be a network. If you want that specific address, a subnet of 255.255.255.255 should work.

boxerboy1168

Ok, so I essentially tell the router that anything coming in on 10.% network from interface % will go out network %?

Also, the interface that the sub interfaces are configured on, does that require an IP address?

boxerboy1168

So I changed the IP routing IP address to the network rather than an IP specified within in the network and my output for

#do show ip route

is

Gateway of last resort is not set


10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.0.0.0/8 is directly connected, GigabitEthernet0/0.2
L 10.0.0.100/32 is directly connected, GigabitEthernet0/0.2
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.0.0.0/8 is directly connected, GigabitEthernet0/0.3
L 20.0.0.100/32 is directly connected, GigabitEthernet0/0.3

Should the change in route show up in the show ip route command?

Next I tried

Router(config)#ip route 20.0.0.0 255.0.0.0 gig
Router(config)#ip route 20.0.0.0 255.0.0.0 gigabitEthernet 0/0.2
%Default route without gateway, if not a point-to-point interface, may impact performance

And ^^^^^ was my output.

Really not sure what's going on here.