Add genev_sys_6081 to cilium devices

[kvaps]

Signed-off-by: Andrei Kvapil kvapss@gmail.com

Pull Request

• Make sure you have followed Kube-OVN Code Style.

What type of this PR

Examples of user facing changes:

• Bug fixes

I use kube-ovn with cilium, metallb and kubevirt.
I run ubuntu vm and expose 22 port with loadbalancer service
I can not access vm via externalIP assigned by metallb (externalTrafficPolicy: local)

Which issue(s) this PR fixes

It seems cilium is not correctly handled response packets recieved on genev_sys_6081 interface:

/ # tcpdump -nn -i any port 22
tcpdump: data link type LINUX_SLL2
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on any, link-type LINUX_SLL2 (Linux cooked v2), snapshot length 262144 bytes
10:41:10.865457 eno5  In  IP 172.16.2.173.52314 > 10.2.0.242.22: Flags [S], seq 720481636, win 65535, options [mss 1410,nop,wscale 6,nop,nop,TS val 135386350 ecr 0,sackOK,eol], length 0
10:41:10.865465 bond0 In  IP 172.16.2.173.52314 > 10.2.0.242.22: Flags [S], seq 720481636, win 65535, options [mss 1410,nop,wscale 6,nop,nop,TS val 135386350 ecr 0,sackOK,eol], length 0
10:41:10.865537 ovn0  Out IP 172.16.2.173.52314 > 10.244.2.5.22: Flags [S], seq 720481636, win 65535, options [mss 1410,nop,wscale 6,nop,nop,TS val 135386350 ecr 0,sackOK,eol], length 0
10:41:10.865867 a33c4744248c_h Out IP 172.16.2.173.52314 > 10.244.2.5.22: Flags [S], seq 720481636, win 65535, options [mss 1410,nop,wscale 6,nop,nop,TS val 135386350 ecr 0,sackOK,eol], length 0
10:41:10.866210 a33c4744248c_h P   IP 10.244.2.5.22 > 172.16.2.173.52314: Flags [S.], seq 3405953119, ack 720481637, win 64704, options [mss 1360,sackOK,TS val 1687566854 ecr 135386350,nop,wscale 7], length 0
10:41:10.866270 genev_sys_6081 Out IP 10.244.2.5.22 > 172.16.2.173.52314: Flags [S.], seq 3405953119, ack 720481637, win 64704, options [mss 1360,sackOK,TS val 1687566854 ecr 135386350,nop,wscale 7], length 0

So I specidied it explicitly in cilium configuration, now packets are going fine