ovs contrack

[root@bogon ~]# ip netns exec left bash
ABRT has detected 1 problem(s). For more info run: abrt-cli list --since 1627875894
[root@bogon ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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
2: tunl0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default qlen 1000
    link/ipip 0.0.0.0 brd 0.0.0.0
245: veth_l1@if246: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether ae:ca:dd:d3:fa:05 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.0.2/24 scope global veth_l1
       valid_lft forever preferred_lft forever
[root@bogon ~]# ip link set veth_l1 up
[root@bogon ~]# scapy
INFO: Can‘t import matplotlib. Won‘t be able to plot.
INFO: Can‘t import PyX. Won‘t be able to use psdump() or pdfdump().
WARNING: No route found for IPv6 destination :: (no default route?)
WARNING: IPython not available. Using standard Python shell instead.
AutoCompletion, History are disabled.
                                      
                     aSPY//YASa       
             apyyyyCY//////////YCa       |
            sY//////YSpcs  scpCY//Pp     | Welcome to Scapy
 ayp ayyyyyyySCP//Pp           syY//C    | Version 2.4.3
 AYAsAYYYYYYYY///Ps              cY//S   |
         pCCCCY//p          cSSps y//Y   | https://github.com/secdev/scapy
         SPPPP///a          pP///AC//Y   |
              A//A            cyP////C   | Have fun!
              p///Ac            sC///a   |
              P////YCpc           A//A   | Craft me if you can.
       scccccp///pSP///p          p//Y   |                   -- IPv6 layer
      sY/////////y  caa           S//P   |
       cayCyayP//Ya              pY/Ya
        sY/PsY////YCc          aC//Yp 
         sc  sccaCY//PCypaapyCP//YSs  
                  spCPY//////YPSps    
                       ccaacs         
                                      
>>> sendp(Ether()/IP(src="192.168.0.2", dst="10.0.0.2")/TCP(sport=1024, dport=2048, flags=0x02, seq=100), iface="veth_l1")
WARNING: No route found (no default route?)
WARNING: No route found (no default route?)
.
Sent 1 packets.
>>> 

[root@bogon ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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
2: tunl0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default qlen 1000
    link/ipip 0.0.0.0 brd 0.0.0.0
245: veth_l1@if246: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state LOWERLAYERDOWN group default qlen 1000
    link/ether ae:ca:dd:d3:fa:05 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.0.2/24 scope global veth_l1
       valid_lft forever preferred_lft forever
[root@bogon ~]# ip r add 0.0.0.0/0 dev veth_l1 scope link
[root@bogon ~]# ip r
default dev veth_l1 scope link linkdown 
192.168.0.0/24 dev veth_l1 proto kernel scope link src 192.168.0.2 linkdown 
You have new mail in /var/spool/mail/root
[root@bogon ~]# ip link set veth_l1 up
[root@bogon ~]# ip r
default dev veth_l1 scope link linkdown 
192.168.0.0/24 dev veth_l1 proto kernel scope link src 192.168.0.2 linkdown 
[root@bogon ~]#