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ae88408256
Allow L2 redirection when VXLAN L3 switching is enabled This patch restricts L3 switching to destination MAC addresses that are marked as routers in order to allow virtual IP appliances that do L2 redirection to function with VXLAN L3 switching enabled. We use L3 switching on VXLAN networks to avoid extra hops when the nominal router for cross-subnet traffic for a VM is remote and the ultimate destination may be local, or closer to the local node. Currently, the destination IP address takes precedence over the MAC address in all cases. Some network appliances receive packets for a virtualized IP address and redirect by changing the destination MAC address (only) to be the final destination for packet processing. VXLAN tunnel endpoints with L3 switching enabled may then overwrite this destination MAC address based on the packet IP address, resulting in potential loops and, at least, breaking L2 redirections that travel through tunnel endpoints. This patch limits L3 switching to the intended case where the original destination MAC address is a next-hop router and relies on the destination MAC address for all other cases, thus allowing L2 redirection and L3 switching to coexist peacefully. Signed-Off-By: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| appletalk | ||
| arcnet | ||
| bonding | ||
| caif | ||
| can | ||
| cris | ||
| dsa | ||
| ethernet | ||
| fddi | ||
| hamradio | ||
| hippi | ||
| hyperv | ||
| ieee802154 | ||
| irda | ||
| phy | ||
| plip | ||
| ppp | ||
| slip | ||
| team | ||
| usb | ||
| vmxnet3 | ||
| wan | ||
| wimax | ||
| wireless | ||
| xen-netback | ||
| dummy.c | ||
| eql.c | ||
| ifb.c | ||
| Kconfig | ||
| LICENSE.SRC | ||
| loopback.c | ||
| macvlan.c | ||
| macvtap.c | ||
| Makefile | ||
| mdio.c | ||
| mii.c | ||
| netconsole.c | ||
| ntb_netdev.c | ||
| rionet.c | ||
| sb1000.c | ||
| Space.c | ||
| sungem_phy.c | ||
| tun.c | ||
| veth.c | ||
| virtio_net.c | ||
| vxlan.c | ||
| xen-netfront.c | ||