Send both gratuitous ARP request and reply on VIP change. #426
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@vholer Is "opennebula" sudoers file also updated? i.e. Cmnd_Alias ONE_NET = /sbin/brctl, /sbin/ebtables, /sbin/iptables, /sbin/ip6tables, /sbin/ip, /sbin/ipset, /usr/bin/arping |
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Yes. |
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Hi,
I tested your proposed patch and it looks good:
```
tcpdump -netti any arp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes
1503388499.555106 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Request who-has 172.17.158.10 (ff:ff:ff:ff:ff:ff) tell 172.17.158.10, length 28
1503388500.585401 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Reply 172.17.158.10 is-at 52:54:00:d5:77:cf, length 28
1503388501.617425 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Request who-has 172.17.158.10 (ff:ff:ff:ff:ff:ff) tell 172.17.158.10, length 28
1503388502.648417 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Reply 172.17.158.10 is-at 52:54:00:d5:77:cf, length 28
1503388503.679604 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Request who-has 172.17.158.10 (ff:ff:ff:ff:ff:ff) tell 172.17.158.10, length 28
1503388504.712967 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Reply 172.17.158.10 is-at 52:54:00:d5:77:cf, length 28
1503388505.740807 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Request who-has 172.17.158.10 (ff:ff:ff:ff:ff:ff) tell 172.17.158.10, length 28
1503388506.764769 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Reply 172.17.158.10 is-at 52:54:00:d5:77:cf, length 28
1503388507.807982 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Request who-has 172.17.158.10 (ff:ff:ff:ff:ff:ff) tell 172.17.158.10, length 28
1503388508.843003 Out 52:54:00:d5:77:cf ethertype ARP (0x0806), length 44: Reply 172.17.158.10 is-at 52:54:00:d5:77:cf, length 28
```
Other hosts are updating their mac-address table so everything ok.
Gr. Stefan
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jfontan
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* Send both gratuitous ARP request and reply on VIP change. * Enable arping in sudoers * Run arping via sudo (cherry picked from commit 9be1a1a)
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