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Just Lucky Really
Asked: 2015-04-30 05:59:36 +0800 CST

Packet loss when configuring multiple networks Ubuntu 14.04.2

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I have previously had this set up working, but it's not working now ... I was wondering if anyone could shine some light on this for me.

Here's my network config:

#internet facing
auto eth0
iface eth0 inet static
        address 192.168.0.1
        netmask 255.255.255.0
        network 192.168.0.0
        broadcast 192.168.0.255
        gateway 192.168.0.254
        dns-nameservers 8.8.8.8

#internal network
auto eth1
iface eth1 inet static
        address 10.0.0.1
        netmask 255.255.255.0
        network 10.0.0.0
        broadcast 10.0.0.255

And here's my routes:

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.0.254   0.0.0.0         UG    0      0        0 eth0
localnet        *               255.255.255.0   U     0      0        0 eth1
192.168.0.0     *               255.255.255.0 U     0      0        0 eth0

Now, when I ping an internet address (8.8.8.8) I get abour 60%-70% packet loss.

But, if I ifdown eth1 (The internal network), it gets no packet loss. Does anyone know what I've done wrong here?

networking

1 Answers

  1. Do you have two separate NIC's for each interface? To the best of my knowledge, a single NIC can't run on two separate networks, so if you're configuring it to behave like such, that could explain your packet loss.

    Have you looked into doing a bridge on your interfaces?

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