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Thread: #ip route

  1. Senior Member boxerboy1168's Avatar
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    #1

    Default #ip route

    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?
    Currently enrolling into WGU's IT - Security Program. Working on LPIC (1,2,3) and CCNA (and S) as long term goals and preparing for the Security+ and A+ as short term goals.
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  3. Senior Member
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    #2
    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.
    Last edited by TechGuru80; 01-07-2018 at 12:06 AM.
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  4. Senior Member boxerboy1168's Avatar
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    #3
    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?
    Currently enrolling into WGU's IT - Security Program. Working on LPIC (1,2,3) and CCNA (and S) as long term goals and preparing for the Security+ and A+ as short term goals.
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  5. Senior Member boxerboy1168's Avatar
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    #4
    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.
    Currently enrolling into WGU's IT - Security Program. Working on LPIC (1,2,3) and CCNA (and S) as long term goals and preparing for the Security+ and A+ as short term goals.
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