Debian Configuration :: Network Namespace Bridging

Jan 27, 2016

My task is to create network namespace, so it can be used to perform some other tasks from it.

Debian 8.2 is used in VMWare virtual machine on windows 7. I have also tried same things with Raspbian on Raspberry Pi 2, but same problems appear.

First, i have followed tutorial https://lwn.net/Articles/580893/ to create pair of virtual ethernet interfaces.

Now i have veth0 in global namespace with ip address 10.1.1.2/24, and veth1 in netns1 namespace with ip address 10.1.1.1/24, and i was able to ping each one from another

Next, i have followed tutorial [URL] ..... to bridge eth0 and veth0, so i can access internet from netns1 namespace.

- First, i have deleted ip addresses for both eth0 and veth0
interfaces, and set them do DOWN state.
- New bridge is created (br0) and both interfaces (eth0 and veth0) are
added to it.
- Then both interfaces are set to UP state, and i run "dhclient br0" to
assign ip address to br0.

From global namespace now it is possible to run "ping google.com" (and br0 interface is used), but from netns1 namespace i get error "Network is unreachable".

$ ip addr show
Code: Select all    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host
           valid_lft forever preferred_lft forever
 
[CODE]....

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[code]...

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