On Tue, 2017-05-09 at 09:20 -0400, John Adam Cutchin wrote:
> He folks,
>
> I'm having some trouble with a Fedora 25 machine using
> NetworkManager.
> The DHCP lease from my ISP expires after two hours, and when it
> happens my internet goes down. The device is still up, but it shows
> no
> IP address.
>
> It looks like dhclient attempted to renew the lease (the lease file
> shows two (or maybe four?) leases) but the device has no inet4
> address. All the leases showed my current and correct IP address.
> Other than the dates, there's no real difference between them.
>
> The info below was captured when it was in the "bad" state, where I
> had no ip address. "nmcli con up enp5s0" fixes it.
>
> Below I've included the time in UTC (to correlate with leases), the
> lease file, the state of the device according to ip, the device
> configuration in /etc/sysconfig, and the contents of "nmcli
> connection
> show enp5s0", some additional logging, software versions, etc.
>
> It's a headless server, there's no graphical desktop running.
> Everything should be controlled by NetworkManager.
>
> Could anyone please suggest something to stop this from happening, or
> some additional places I could look for the root cause?
Could you grab a bit more logging? Try:
nmcli g log level trace
and then get the problem to happen again. That'll dump a *ton* of info
to 'journalctl -b -u NetworkManager', but that's the useful info we
want to help debug the issue.
Once you've reproduced it, you can "nmcli g log level info" to get
logging back to normal.
Thanks!
Dan
> Thanks,
> Adam
>
>
> $ cat /etc/fedora-release
> Fedora release 25 (Twenty Five)
>
> $ rpm -qa | grep NetworkManager
> NetworkManager-1.4.4-4.fc25.x86_64
> NetworkManager-libnm-1.4.4-4.fc25.x86_64
> NetworkManager-tui-1.4.4-4.fc25.x86_64
> NetworkManager-vpnc-1.2.4-1.fc25.x86_64
> NetworkManager-team-1.4.4-4.fc25.x86_64
>
>
> $ date -u
> UTC Mon May 8 15:53:01 UTC 2017
>
> $ ip add show enp5s0:
>
> enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel
> state UP group default qlen 1000
> link/ether 80:ee:73:77:d1:ad brd ff:ff:ff:ff:ff:ff
> inet6 fe80::b9a0:1e03:a05b:4bd5/64 scope link
> valid_lft forever preferred_lft forever
>
> $ cat /var/lib/NetworkManager/dhclient-b34d4f03-56b4-4597-a454-
> 57bd4f7b4f3d-enp5s0.lease
> default-duid "\000\004l\025DS\375xG\301\24301o\312e\022\253";
> lease {
> interface "enp5s0";
> fixed-address <my public IP>;
> option subnet-mask 255.255.255.0;
> option dhcp-lease-time 7200;
> option routers <my ISPs gateway>;
> option dhcp-message-type 5;
> option dhcp-server-identifier <my ISPs gateway>;
> option domain-name-servers <my ISPs DNS servers>;
> option domain-name "<my ISPs domain name>";
> renew 1 2017/05/08 14:34:14;
> rebind 1 2017/05/08 15:31:23;
> expire 1 2017/05/08 15:46:23;
> }
> lease {
> interface "enp5s0";
> fixed-address <my public IP>;
> option subnet-mask 255.255.255.0;
> option routers <my ISPs gateway>;
> option dhcp-lease-time 7200;
> option dhcp-message-type 5;
> option domain-name-servers <my ISPs DNS servers>;
> option dhcp-server-identifier <my ISPs gateway>;
> option domain-name "<my ISPs domain name>";
> renew 1 2017/05/08 14:38:18;
> rebind 1 2017/05/08 15:37:01;
> expire 1 2017/05/08 15:52:01;
> }
> lease {
> interface "enp5s0";
> fixed-address <my public IP>;
> option subnet-mask 255.255.255.0;
> option routers <my ISPs gateway>;
> option dhcp-lease-time 7200;
> option dhcp-message-type 5;
> option domain-name-servers <my ISPs DNS servers>;
> option dhcp-server-identifier <my ISPs gateway>;
> option domain-name "<my ISPs domain name>";
> renew 1 2017/05/08 15:33:09;
> rebind 1 2017/05/08 16:23:18;
> expire 1 2017/05/08 16:38:18;
> }
> lease {
> interface "enp5s0";
> fixed-address <my public IP>;
> option subnet-mask 255.255.255.0;
> option routers <my ISPs gateway>;
> option dhcp-lease-time 7200;
> option dhcp-message-type 5;
> option domain-name-servers <my ISPs DNS servers>;
> option dhcp-server-identifier <my ISPs gateway>;
> option domain-name "<my ISPs domain name>";
> renew 1 2017/05/08 16:26:14;
> rebind 1 2017/05/08 17:18:09;
> expire 1 2017/05/08 17:33:09;
> }
>
> $ cat /etc/sysconfig/network-scripts/ifcfg-enp5s0
> HWADDR=<MAC>
> TYPE=Ethernet
> BOOTPROTO=dhcp
> DNS1=<DNS 1>
> DNS2=<DNS 2>
> DEFROUTE=yes
> IPV4_FAILURE_FATAL=no
> IPV4_ROUTE_METRIC=100
> IPV4_DNS_PRIORITY=100
> IPV6INIT=yes
> IPV6_AUTOCONF=no
> IPV6_DEFROUTE=yes
> IPV6_FAILURE_FATAL=no
> IPV6_ADDR_GEN_MODE=stable-privacy
> IPV6_DNS_PRIORITY=100
> NAME=enp5s0
> UUID=b34d4f03-56b4-4597-a454-57bd4f7b4f3d
> DEVICE=enp5s0
> ONBOOT=yes
> ZONE=public
> PEERDNS=yes
> PEERROUTES=yes
>
> $ nmcli sho con enp50
>
> connection.id: enp5s0
> connection.uuid: b34d4f03-56b4-4597-a454-
> 57bd4f7b4f3d
> connection.stable-id: --
> connection.interface-name: enp5s0
> connection.type: 802-3-ethernet
> connection.autoconnect: yes
> connection.autoconnect-priority: 0
> connection.timestamp: 1494258511
> connection.read-only: no
> connection.permissions:
> connection.zone: public
> connection.master: --
> connection.slave-type: --
> connection.autoconnect-slaves: -1 (default)
> connection.secondaries:
> connection.gateway-ping-timeout: 0
> connection.metered: unknown
> connection.lldp: -1 (default)
> 802-3-ethernet.port: --
> 802-3-ethernet.speed: 0
> 802-3-ethernet.duplex: --
> 802-3-ethernet.auto-negotiate: yes
> 802-3-ethernet.mac-address: <My MAC>
> 802-3-ethernet.cloned-mac-address: --
> 802-3-ethernet.generate-mac-address-mask:--
> 802-3-ethernet.mac-address-blacklist:
> 802-3-ethernet.mtu: auto
> 802-3-ethernet.s390-subchannels:
> 802-3-ethernet.s390-nettype: --
> 802-3-ethernet.s390-options:
> 802-3-ethernet.wake-on-lan: 1 (default)
> 802-3-ethernet.wake-on-lan-password: --
> ipv4.method: auto
> ipv4.dns: <my ISPs DNS servers>
> ipv4.dns-search:
> ipv4.dns-options: (default)
> ipv4.dns-priority: 100
> ipv4.addresses:
> ipv4.gateway: --
> ipv4.routes: { ip = <route 1>/32, nh =
> <route 2>, mt = 100 }
> ipv4.route-metric: 100
> ipv4.ignore-auto-routes: no
> ipv4.ignore-auto-dns: no
> ipv4.dhcp-client-id: --
> ipv4.dhcp-timeout: 0
> ipv4.dhcp-send-hostname: yes
> ipv4.dhcp-hostname: --
> ipv4.dhcp-fqdn: --
> ipv4.never-default: no
> ipv4.may-fail: yes
> ipv4.dad-timeout: -1 (default)
> ipv6.method: link-local
> ipv6.dns:
> ipv6.dns-search:
> ipv6.dns-options: (default)
> ipv6.dns-priority: 100
> ipv6.addresses:
> ipv6.gateway: --
> ipv6.routes:
> ipv6.route-metric: -1
> ipv6.ignore-auto-routes: no
> ipv6.ignore-auto-dns: no
> ipv6.never-default: no
> ipv6.may-fail: yes
> ipv6.ip6-privacy: -1 (unknown)
> ipv6.addr-gen-mode: stable-privacy
> ipv6.dhcp-send-hostname: yes
> ipv6.dhcp-hostname: --
> ipv6.token: --
> GENERAL.NAME: enp5s0
> GENERAL.UUID: b34d4f03-56b4-4597-a454-
> 57bd4f7b4f3d
> GENERAL.DEVICES: enp5s0
> GENERAL.STATE: activated
> GENERAL.DEFAULT: yes
> GENERAL.DEFAULT6: no
> GENERAL.VPN: no
> GENERAL.ZONE: public
> GENERAL.DBUS-PATH:
> /org/freedesktop/NetworkManager/ActiveConnection/34
> GENERAL.CON-PATH:
> /org/freedesktop/NetworkManager/Settings/0
> GENERAL.SPEC-OBJECT: /
> GENERAL.MASTER-PATH: --
> DHCP4.OPTION[1]: requested_routers = 1
> DHCP4.OPTION[2]: requested_domain_search = 1
> DHCP4.OPTION[3]: requested_time_offset = 1
> DHCP4.OPTION[4]: requested_domain_name = 1
> DHCP4.OPTION[5]:
> requested_rfc3442_classless_static_routes = 1
> DHCP4.OPTION[6]: requested_classless_static_ro
> utes = 1
> DHCP4.OPTION[7]: dhcp_server_identifier = <my
> ISPs gateway>
> DHCP4.OPTION[8]: requested_wpad = 1
> DHCP4.OPTION[9]: requested_broadcast_address =
> 1
> DHCP4.OPTION[10]: next_server = 0.0.0.0
> DHCP4.OPTION[11]: broadcast_address = <my
> public
> broadcast address>
> DHCP4.OPTION[12]: requested_interface_mtu = 1
> DHCP4.OPTION[13]: requested_subnet_mask = 1
> DHCP4.OPTION[14]: routers = <my ISPs gateway>
> DHCP4.OPTION[15]: dhcp_message_type = 5
> DHCP4.OPTION[16]: ip_address = <my ISPs
> gateway>26
> DHCP4.OPTION[17]: requested_static_routes = 1
> DHCP4.OPTION[18]: expiry = 1494264789
> DHCP4.OPTION[19]: requested_domain_name_servers
> = 1
> DHCP4.OPTION[20]: requested_nis_servers = 1
> DHCP4.OPTION[21]: requested_ntp_servers = 1
> DHCP4.OPTION[22]: domain_name = <my ISPs domain
> name>
> DHCP4.OPTION[23]: dhcp_lease_time = 7200
> DHCP4.OPTION[24]: domain_name_servers = <my
> ISPs
> DNS servers>
> DHCP4.OPTION[25]: requested_ms_classless_static
> _routes = 1
> DHCP4.OPTION[26]: subnet_mask = 255.255.255.0
> DHCP4.OPTION[27]: network_number = <my public
> subnet>
> DHCP4.OPTION[28]: requested_host_name = 1
> DHCP4.OPTION[29]: requested_nis_domain = 1
> IP6.ADDRESS[1]: fe80::b9a0:1e03:a05b:4bd5/64
>
> I forgot to get journalctl output for that exact time, but they all
> look about the same. Here's an example:
>
> May 08 20:51:47 <my host name> dhclient[20294]: DHCPREQUEST on enp5s0
> to <my ISPs gateway> port 67 (xid=0x23d50d70)
> May 08 20:51:47 <my host name> dhclient[20294]: DHCPACK from <my ISPs
> gateway> (xid=0x23d50d70)
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5327] dhcp4 (enp5s0): address <my external IP>
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5333] dhcp4 (enp5s0): plen 24 (255.255.255.0)
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5333] dhcp4 (enp5s0): gateway <my ISPs gateway>
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5333] dhcp4 (enp5s0): server identifier <my ISPs
> gateway>
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5334] dhcp4 (enp5s0): lease time 7200
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5334] dhcp4 (enp5s0): nameserver '71.252.0.12'
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5334] dhcp4 (enp5s0): nameserver '71.242.0.12'
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5334] dhcp4 (enp5s0): domain name '<my ISP>'
> May 08 20:51:47 <my host name> NetworkManager[605]: <info>
> [1494291107.5334] dhcp4 (enp5s0): state changed bound -> bound
> May 08 20:51:47 <my host name> dhclient[20294]: bound to <my external
> IP> -- renewal in 3267 seconds.
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