From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- Documentation/networking/vxlan.txt | 47 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/networking/vxlan.txt (limited to 'Documentation/networking/vxlan.txt') diff --git a/Documentation/networking/vxlan.txt b/Documentation/networking/vxlan.txt new file mode 100644 index 000000000..6d993510f --- /dev/null +++ b/Documentation/networking/vxlan.txt @@ -0,0 +1,47 @@ +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 -- cgit v1.2.3-54-g00ecf