mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 04:31:50 +00:00
cc9b310165
Some commands don't work in its example doc. The patch will fix it. Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
48 lines
1.7 KiB
Plaintext
48 lines
1.7 KiB
Plaintext
Virtual eXtensible Local Area Networking documentation
|
|
======================================================
|
|
|
|
The VXLAN protocol is a tunnelling protocol that is designed to
|
|
solve the problem of limited number of available VLAN's (4096).
|
|
With VXLAN identifier is expanded to 24 bits.
|
|
|
|
It is a draft RFC standard, that is implemented by Cisco Nexus,
|
|
Vmware and Brocade. The protocol runs over UDP using a single
|
|
destination port (still not standardized by IANA).
|
|
This document describes the Linux kernel tunnel device,
|
|
there is also an implantation of VXLAN for Openvswitch.
|
|
|
|
Unlike most tunnels, a VXLAN is a 1 to N network, not just point
|
|
to point. A VXLAN device can either dynamically learn the IP address
|
|
of the other end, in a manner similar to a learning bridge, or the
|
|
forwarding entries can be configured statically.
|
|
|
|
The management of vxlan is done in a similar fashion to it's
|
|
too closest neighbors GRE and VLAN. Configuring VXLAN requires
|
|
the version of iproute2 that matches the kernel release
|
|
where VXLAN was first merged upstream.
|
|
|
|
1. Create vxlan device
|
|
# ip li add vxlan0 type vxlan id 42 group 239.1.1.1 dev eth1
|
|
|
|
This creates a new device (vxlan0). The device uses the
|
|
the multicast group 239.1.1.1 over eth1 to handle packets where
|
|
no entry is in the forwarding table.
|
|
|
|
2. Delete vxlan device
|
|
# ip link delete vxlan0
|
|
|
|
3. Show vxlan info
|
|
# ip -d link show vxlan0
|
|
|
|
It is possible to create, destroy and display the vxlan
|
|
forwarding table using the new bridge command.
|
|
|
|
1. Create forwarding table entry
|
|
# bridge fdb add to 00:17:42:8a:b4:05 dst 192.19.0.2 dev vxlan0
|
|
|
|
2. Delete forwarding table entry
|
|
# bridge fdb delete 00:17:42:8a:b4:05 dev vxlan0
|
|
|
|
3. Show forwarding table
|
|
# bridge fdb show dev vxlan0
|