Hi, there
On HP-UX, I want to multicast packets on two different IP network repectively.
The two NIC are configured with two different IP. The routes are added with one default and one net for each IP . The multisender programs bind their own local IP, multireceiver programs add the membership with the same multicast address but different port and interface(IP). Normally, the pair of sender and receiver works correctly. When we pull out the network wired that the default route is configured, the multicast packets can not received on two network. However, when we pull out the network wired that do not configured default route, the packets can still be received with the two multireceiver, at this time, one of the IP can not pinged.
So the above test makes the following results:
1. The multicast has nothing to do with the local IP address, it only cares about the multicast address and port
2. The default route decides the multicast packets whether they can send out.
My question is how I can multicast the packets on the different IP network respectively. Once one of the network failed or its wired is pull out, the other network can still multicast normally. That means how I can implementate the dual network multiucasting,thanks.
Hi please help,
theoretically I',m interested in starting a streaming service using multicast IP service. I'd like to know how do I get an IP address that I can send my data too? (please don't just point me too Internet Assigned Numbers Authority as ive been there and it just seem to state... (1 Reply)
Hi Gurus,
I need to add Multicast Port = xyz
Multicast Address = 123.134.143 ( example) to my firewall rules. Can you please guide me with the lines I need to update my iptables files with. (0 Replies)
Hello all,
I have created a UDP multicast transmitter and receiver, first using windows. But now I need the receiver to run on Ubuntu 10.04.
The code is the following:
/************************** Receiver *************************/
// Module Name: Receiver.c
//
// Description:
// ... (0 Replies)
hi,
i'm using fedora. and i want to install mospf and pim sm services.
i read that there is mgated daemon for mospf but i cant find it.
can u tell me where to find it? and how to install it? (0 Replies)
On Linux, I have configured two different IP address for two network device eth0 ,eth1 , in my program, I want to multicast differently on these two network, I know it must add route for single network and I try to config another route for second network,but it can not work correctly, how to config... (0 Replies)
On HP-UX, we want to exchange data via multicast, there happen to meet a problem: sometimes the receiver that has joined the group can not receive the multicast data, but the recvfrom call returned no error. We have reconfig the network and added the default the route, but still can not fixed it,... (0 Replies)
How can I assign multicast ip address to my Sun server. I need this configuration to set up weblogic in cluster mode. This setup needs a multicast IP address where the managed servers can broadcast their heartbeats.
Thanks (0 Replies)
VXLAN(4) BSD Kernel Interfaces Manual VXLAN(4)NAME
vxlan -- Virtual eXtensible LAN interface
SYNOPSIS
To compile this driver into the kernel, place the following line in your kernel configuration file:
device vxlan
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_vxlan_load="YES"
DESCRIPTION
The vxlan driver creates a virtual tunnel endpoint in a vxlan segment. A vxlan segment is a virtual Layer 2 (Ethernet) network that is over-
laid in a Layer 3 (IP/UDP) network. vxlan is analogous to vlan(4) but is designed to be better suited for large, multiple tenant data center
environments.
Each vxlan interface is created at runtime using interface cloning. This is most easily done with the ifconfig(8) create command or using
the cloned_interfaces variable in rc.conf(5). The interface may be removed with the ifconfig(8) destroy command.
The vxlan driver creates a pseudo Ethernet network interface that supports the usual network ioctl(2)s and is thus can be used with
ifconfig(8) like any other Ethernet interface. The vxlan interface encapsulates the Ethernet frame by prepending IP/UDP and vxlan headers.
Thus, the encapsulated (inner) frame is able to transmitted over a routed, Layer 3 network to the remote host.
The vxlan interface may be configured in either unicast or multicast mode. When in unicast mode, the interface creates a tunnel to a single
remote host, and all traffic is transmitted to that host. When in multicast mode, the interface joins an IP multicast group, and receives
packets sent to the group address, and transmits packets to either the multicast group address, or directly the remote host if there is an
appropriate forwarding table entry.
When the vxlan interface is brought up, a UDP(4)socket(9) is created based on the configuration, such as the local address for unicast mode
or the group address for multicast mode, and the listening (local) port number. Since multiple vxlan interfaces may be created that either
use the same local address or join the same group address, and use the same port, the driver may share a socket among multiple interfaces.
However, each interface within a socket must belong to a unique vxlan segment. The analogous vlan(4) configuration would be a physical
interface configured as the parent device for multiple VLAN interfaces, each with a unique VLAN tag. Each vxlan segment is identified by a
24-bit value in the vxlan header called the ``VXLAN Network Identifier'', or VNI.
When configured with the ifconfig(8) vxlanlearn parameter, the interface dynamically creates forwarding table entries from received packets.
An entry in the forwarding table maps the inner source MAC address to the outer remote IP address. During transmit, the interface attempts
to lookup an entry for the encapsulated destination MAC address. If an entry is found, the IP address in the entry is used to directly
transmit the encapsulated frame to the destination. Otherwise, when configured in multicast mode, the interface must flood the frame to all
hosts in the group. The maximum number of entries in the table is configurable with the ifconfig(8) vxlanmaxaddr command. Stale entries in
the table periodically pruned. The timeout is configurable with the ifconfig(8) vxlantimeout command. The table may be viewed with the
sysctl(8) net.link.vxlan.N.ftable.dump command.
MTU
Since the vxlan interface encapsulates the Ethernet frame with an IP, UDP, and vxlan header, the resulting frame may be larger than the MTU
of the physical network. The vxlan specification recommends the physical network MTU be configured to use jumbo frames to accommodate the
encapsulated frame size. Alternatively, the ifconfig(8) mtu command may be used to reduce the MTU size on the vxlan interface to allow the
encapsulated frame to fit in the current MTU of the physical network.
EXAMPLES
Create a vxlan interface in unicast mode with the vxlanlocal tunnel address of 192.168.100.1, and the vxlanremote tunnel address of
192.168.100.2.
ifconfig vxlan create vxlanid 108 vxlanlocal 192.168.100.1 vxlanremote 192.168.100.2
Create a vxlan interface in multicast mode, with the local address of 192.168.10.95, and the group address of 224.0.2.6. The em0 interface
will be used to transmit multicast packets.
ifconfig vxlan create vxlanid 42 vxlanlocal 192.168.10.95 vxlangroup 224.0.2.6 vxlandev em0
Once created, the vxlan interface can be configured with ifconfig(8).
SEE ALSO inet(4), inet6(4), ifconfig(8), sysctl(8), vlan(8)
M. Mahalingam and et al, Virtual eXtensible Local Area Network (VXLAN): A Framework for Overlaying Virtualized Layer 2 Networks over Layer 3
Networks, August 2014, RFC 7348.
AUTHOR
The vxlan driver was written by Bryan Venteicher <bryanv@freebsd.org>.
BSD December 16, 2014 BSD