I'm using mac-valn to create virtual NIC and send package
Here is the network
20.0.0.25/24 20.0.0.26/24
----- ens10 --------- ens4 -----
| PC1 | ----------| VSwitch |--------| PC2 |
| | | | | |
----- --------- ------
Here is the command I use:
ip link add link ens10 ens10.1 type macvlan
ip addr add 20.0.0.100/24 dev ens10.1
ip link set dev ens10.1 up
Here is the ip a return :
3: ens10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 0c:da:41:1d:fe:6c brd ff:ff:ff:ff:ff:ff
inet 20.0.0.25/24 scope global ens10
valid_lft forever preferred_lft forever
inet6 fe80::eda:41ff:fe1d:fe6c/64 scope link
valid_lft forever preferred_lft forever
5: ens10.1@ens10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 3e:9e:85:d0:f7:f1 brd ff:ff:ff:ff:ff:ff
inet 20.0.0.100/24 scope global ens10.1
valid_lft forever preferred_lft forever
inet6 fe80::3c9e:85ff:fed0:f7f1/64 scope link
valid_lft forever preferred_lft forever
When I send Ping with ping -I 20.0.0.100 20.0.0.26,I found I only can capture packet on ens10, and all Ping packet use the mac of ens10,not the ens10.1. And I capture an ARP between 20.0.0.100 and 20.0.0.26 , it reply the mac of ens10,not the ens10.1.
Is there any way to send Package with ens10.1's MAC address?
Use network namespace can solve this problem.Here is the command:
create a network namespace
ip netns add net1
create a mac-vlan
ip link add link ens10 mac1 type macvlan mode private
set mac-vlan into network namespace, set ip and up
ip link set mac1 netns net1
ip netns exec net1 bash //after run this command,all command below will exec in net1 which is detached from the main network
ip netns exec net1 ip addr add 20.0.0.100/24 dev mac1
ip netns exec net ip link
Then send Ping with ping -I 20.0.0.100 20.0.0.26 and I found all packet use the mac of mac1,not the ens10.