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Thread: Changed router, "Default Route" still points to old router address

  1. #1
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    Changed router, "Default Route" still points to old router address

    I had Asus router (192.168.29.1). It broke. I got new TP-Link (192.168.0.1).
    The new router is up and running. All the devices are connected and no issues.
    However, one desktop can't connect to internet. It is hard wired.
    When I look at the connection profile, it has"
    Correct IP address (issued by new router) under 192.168.0.1/24
    Correct DNS (new router) 192.168.0.1.

    Wrong "Default Route" 192.168.29.1 (pointing to old router ip).

    I looked into /etc/netplan. But it looks like the "renderer : NetworkManager". And there's nothing else in the config/yaml file.
    I also, looked around in /etc/network and /etc/NetworkManager directories. But haven't been able to track this entry down.

    Could you tell me how to correct this?

    Output from command: ip address:

    Code:
    1: lo:<LOOPBACK, UP, LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        inet 127.0.0.1/8 scope host lo
            valid_lft forever preferred_lft forever
    2: eno1: <BROADCAST, MULTICAST, UP, LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
        inet 192.168.0.130/24 brd 192.168.0.255 scope global dynamic noprefixroute eno1
            valid_lft 4459sec preferred_lft 4459sec
        inet 192.168.29.195/24 brd 192.168.29.255 scope global noprefixroute eno1
            valid_lft forever preferred_lft forever
    3: virbr0 <NO-CARRIER, BROADCASE, MULTICAST, UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
        inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
            valid_lft forever preferred_lft forever

  2. #2
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    Re: Changed router, "Default Route" still points to old router address

    Code:
    2: eno1: <BROADCAST, MULTICAST, UP, LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
        inet 192.168.0.130/24 brd 192.168.0.255 scope global dynamic noprefixroute eno1
            valid_lft 4459sec preferred_lft 4459sec
        inet 192.168.29.195/24 brd 192.168.29.255 scope global noprefixroute eno1
            valid_lft forever preferred_lft forever
    Somehow you have 2 IPs assigned to the same NIC.
    Also, showing the route -n output would be helpful. ip command output is ugly.

    If you've looked in the GUI, in /etc/netplan/, in /etc/network/ then I don't know where else you should have placed network configs. You could manually just bring down the unwanted IP. Wouldn't hurt to check the log files.

    BTW, network configs has changed drastically the last few years. Would be nice to know which release you are running and whether DHCP is used.

  3. #3
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    Re: Changed router, "Default Route" still points to old router address

    Thank you.

    How do I manually bring down the unwanted IP?

    output from route -n:
    Code:
    Destination     Gateway             Genmast           Flags     Metric     Ref     Use     Iface
    0.0.0.0           192.168.29.1      0.0.0.0             UG        202         0       0         eno1
    0.0.0.0             192.168.0.1      0.0.0.0             UG        20100     0       0         eno1
    169.254.0.0      0.0.0.0             255.255.0.0      U          1000       0       0         virbr0
    192.168.0.0      0.0.0.0             255.255.255.0  U          100         0       0         eno1
    192.168.29.0    0.0.0.0             255.255.255.0  U          202         0       0         eno1
    192.168.122.0  0.0.0.0             255.255.255.0  U           100        0       0         virbr0
    *forgive the formatting. I had to type it up since the machine's not connected.
    Last edited by sp40140; December 3rd, 2020 at 03:14 PM.

  4. #4
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    Re: Changed router, "Default Route" still points to old router address

    Quote Originally Posted by TheFu View Post
    BTW, network configs has changed drastically the last few years. Would be nice to know which release you are running and whether DHCP is used.
    Answer the questions so people can help. Good luck.

  5. #5
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    Re: Changed router, "Default Route" still points to old router address

    Version is 20.04.1 LTS 64 bit.
    DHCP is enabled and automatic.

  6. #6
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    Re: Changed router, "Default Route" still points to old router address

    Any ideas on how to fix this?

  7. #7
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    Re: Changed router, "Default Route" still points to old router address

    I re-built the server.
    Network is fine now.

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