[Bug 788301] Re: Networking fails with two interfaces on the same network
Your setup can't possibly work (and indeed it doesn't). You can't have two interfaces going to the same network without proper bonding, especially when you also set both as your default gateway with the same metric. What I think you want in your case is some simple bonding of both interfaces, then add both of your ips to the resulting bond0, this will give you proper load-balancing between the two interfaces and high availability. Look at the ifenslave-2.6 package and it's associated manpage. ** Changed in: ifupdown (Ubuntu) Status: Triaged = Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
** Changed in: ifupdown (Ubuntu) Status: Incomplete = Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
If I disable eth1 with ifdown eth1 the results of the same commands are: -- root@pc1:/# ip link show 1: lo: LOOPBACK,UP,LOWER_UP mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 00:18:f3:91:08:9d brd ff:ff:ff:ff:ff:ff 3: eth1: BROADCAST,MULTICAST mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:18:f3:91:11:eb brd ff:ff:ff:ff:ff:ff 4: wlan0: NO-CARRIER,BROADCAST,MULTICAST,UP mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:15:af:08:f6:ea brd ff:ff:ff:ff:ff:ff -- root@pc1:/# ip addr show 1: lo: LOOPBACK,UP,LOWER_UP mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 00:18:f3:91:08:9d brd ff:ff:ff:ff:ff:ff inet 192.168.1.2/24 brd 192.168.1.255 scope global eth0 inet6 fe80::218:f3ff:fe91:89d/64 scope link valid_lft forever preferred_lft forever 3: eth1: BROADCAST,MULTICAST mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:18:f3:91:11:eb brd ff:ff:ff:ff:ff:ff inet 192.168.1.3/24 brd 192.168.1.255 scope global eth1 4: wlan0: NO-CARRIER,BROADCAST,MULTICAST,UP mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:15:af:08:f6:ea brd ff:ff:ff:ff:ff:ff -- root@pc1:/# ip route show 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.2 default via 192.168.1.1 dev eth0 metric 100 -- root@pc1:/# ip route get 1.2.3.4 1.2.3.4 via 192.168.1.1 dev eth0 src 192.168.1.2 cache mtu 1500 advmss 1460 hoplimit 64 -- root@pc1:/# route Kernel IP routing table Destination Gateway Genmask Flags Metric RefUse Iface 192.168.1.0 * 255.255.255.0 U 0 00 eth0 default 192.168.1.1 0.0.0.0 UG10000 eth0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
Tried again today, in Ubuntu 10.04 with all the updates applied, and the bug is still there. To Stéphane Graber (stgraber) and Daniel Hahler (blueyed), here are the outputs of the commands when both eth0 and eth1 are up and the networking doesn't work: -- root@pc1:/# ip link show 1: lo: LOOPBACK,UP,LOWER_UP mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 00:18:f3:91:08:9d brd ff:ff:ff:ff:ff:ff 3: eth1: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:18:f3:91:11:eb brd ff:ff:ff:ff:ff:ff 4: wlan0: NO-CARRIER,BROADCAST,MULTICAST,UP mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:15:af:08:f6:ea brd ff:ff:ff:ff:ff:ff -- root@pc1:/# ip addr show 1: lo: LOOPBACK,UP,LOWER_UP mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 00:18:f3:91:08:9d brd ff:ff:ff:ff:ff:ff inet 192.168.1.2/24 brd 192.168.1.255 scope global eth0 inet6 fe80::218:f3ff:fe91:89d/64 scope link valid_lft forever preferred_lft forever 3: eth1: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:18:f3:91:11:eb brd ff:ff:ff:ff:ff:ff inet 192.168.1.3/24 brd 192.168.1.255 scope global eth1 inet6 fe80::218:f3ff:fe91:11eb/64 scope link valid_lft forever preferred_lft forever 4: wlan0: NO-CARRIER,BROADCAST,MULTICAST,UP mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:15:af:08:f6:ea brd ff:ff:ff:ff:ff:ff -- root@pc1:/# ip route show 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.2 192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.3 169.254.0.0/16 dev eth1 scope link metric 1000 default via 192.168.1.1 dev eth1 metric 100 default via 192.168.1.1 dev eth0 metric 100 -- root@pc1:/# ip route get 1.2.3.4 1.2.3.4 via 192.168.1.1 dev eth0 src 192.168.1.2 cache mtu 1500 advmss 1460 hoplimit 64 -- root@pc1:/# route Kernel IP routing table Destination Gateway Genmask Flags Metric RefUse Iface 192.168.1.0 * 255.255.255.0 U 0 00 eth0 192.168.1.0 * 255.255.255.0 U 0 00 eth1 link-local * 255.255.0.0 U 1000 00 eth1 default 192.168.1.1 0.0.0.0 UG10000 eth1 default 192.168.1.1 0.0.0.0 UG10000 eth0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
Yeah, having two path to the same network without using proper bonding seems a bit wrong, also having two IPv4 interfaces providing a default gateway may break the routing table quite badly. Please attach: ip link show ip addr show ip route show ip route get 1.2.3.4 This should help understand what's going on. ** Changed in: ifupdown (Ubuntu) Status: Confirmed = Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
** Changed in: ifupdown (Ubuntu) Importance: Undecided = Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
** Changed in: ifupdown (Ubuntu) Importance: Medium = Undecided -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
** Changed in: ifupdown (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
I can confirm this using wlan0 and eth0 on the same network, but assumed this was normal. Did it work before 10.04 with the same setup? Please provide the output of route. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/788301/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
Here are the results of doing just that experiment: root@pc1:/# ifup eth1 root@pc1:/# root@pc1:/# nslookup www.yahoo.com ;; connection timed out; no servers could be reached root@pc1:/# ifdown eth1 root@pc1:/# root@pc1:/# nslookup www.yahoo.com Server: 212.4.64.139 Address:212.4.64.139#53 Non-authoritative answer: www.yahoo.com canonical name = fp.wg1.b.yahoo.com. fp.wg1.b.yahoo.com canonical name = eu-fp.wa1.b.yahoo.com. Name: eu-fp.wa1.b.yahoo.com Address: 87.248.122.122 Name: eu-fp.wa1.b.yahoo.com Address: 87.248.112.181 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
Here is the content of /etc/network/interfaces: auto eth0 iface eth0 inet static address 192.168.1.2 netmask 255.255.255.0 nework 192.168.1.0 gateway 192.168.1.1 auto eth1 iface eth1 inet static address 192.168.1.3 netmask 255.255.255.0 nework 192.168.1.0 gateway 192.168.1.1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 788301] Re: Networking fails with two interfaces on the same network
The problem appears on Ubuntu 10.04. I also tested this in Ubuntu 11.04 on another computer with two interfaces (eth0 and wlan0) and the same problem occurs. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788301 Title: Networking fails with two interfaces on the same network -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
