While attempting to examine the plumbing of OpenStack Neutron networking you can find yourself with horribly long commands along the lines of…

# ip netns exec qdhcp-e4ea15c9-8597-4f0b-a3eb-81a74a402a24 ip addr
# ip netns exec qdhcp-e4ea15c9-8597-4f0b-a3eb-81a74a402a24 ip route

Save yourself a little sanity, and use the trick recommended by Open Cloud Blog. Simply launch a shell in that namespace, and the results of subsequent commands while be scoped to that namespace.

# ip netns exec qdhcp-e4ea15c9-8597-4f0b-a3eb-81a74a402a24 bash
# ip addr
# ip route
# exit

Just type ‘exit’ to back out.