ipv6-ping-linklocal-bridge

ipv6-ping-linklocal-bridge.sh

# setup
ip netns add radio
ip netns add ocp
ip link add veth1 netns radio type  veth peer name veth2 netns ocp

# First network namespace == radio
ip netns exec radio bash
ip link set dev veth1 up
  veth1@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
      link/ether 6e:90:92:21:48:c2 brd ff:ff:ff:ff:ff:ff link-netns ocp
      inet6 fe80::6c90:92ff:fe21:48c2/64 scope link

# Second networknamespace == OCP
ip netns exec ocp bash
ip link set dev veth2 up
  veth2@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether fa:d7:8e:31:41:58 brd ff:ff:ff:ff:ff:ff link-netns radio
    inet6 fe80::f8d7:8eff:fe31:4158/64 scope link
       valid_lft forever preferred_lft forever

ping6 fe80::6c90:92ff:fe21:48c2%veth2 // through veth2 works

# set up the bridge in OCP namespace (like br-ex)
ip link add name br0 type bridge
ip link set dev br0 up
ip link set dev veth2 master br0 // here ping through veth2 stops but LL address remain

veth2@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UP group default qlen 1000
    link/ether fa:d7:8e:31:41:58 brd ff:ff:ff:ff:ff:ff link-netns radio
    inet6 fe80::f8d7:8eff:fe31:4158/64 scope link
       valid_lft forever preferred_lft forever
br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether fa:d7:8e:31:41:58 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::d8c2:f4ff:fe0c:ff86/64 scope link
       valid_lft forever preferred_lft forever

ip netns exec ocp ping6 fe80::6c90:92ff:fe21:48c2%br0 //now it works through the br0 (== br-ex in real setup)_