Juniper Olive Multicast Patch

Multicasting with Olive Singtel - posted in JUNIPER: Guys who has run multicasting on Olive machine please share your experience. There is a txt file in the singtel.

Jan 14, 2009  Multicast in Junos 9.X running in VMware olive works out of the box with no hacks. So if you want to pass a certification, especially when Juniper.

Ok, one router it s cool but useless alone. It s time to make your virtual network. There are many

ways to network your olive routers.Olive to Olive using UNIX sockets

UNIX sockets create a TCP stream between two Qemu instances with one a client and the other

a server. Apparently this method creates duplicate packets sometimes.

qemu R1.img -m 96 -nographic-daemonize-serial telnet::2001,server,nowait

-localtime-net nic,vlan 1,macaddr 00:aa::,model e1000

-net socket,vlan 1,listen :6000

qemu R2.img -m 96 -nographic-daemonize-serial telnet::2002,server,nowait

-net socket,vlan 1,connect 127.0.0.00

Olive to Olive using UDP tunnels

UDP tunnels are mainly used to connect to Dynamips/GNS3 emulated routers but can also be used as a more reliable way to connect two Qemu olives together but this can result in much lower latency connections as well.

Olive to real world using TAP interface

One way to connect an interface on your Olive with a real Ethernet NIC is to use a bridge and the Qemu tap option.

It is required that you have the generic TUN/TAP driver either built-in to your kernel, or availableas a module. To check the availability of this module do the following:

If you get no such file or directory, try doing a modprobe tun. It should then appear in the

One way to connect an interface on your Olive with a real Ethernet port is to use a bridge andthe net -tap option. This requires you to have the generic TUN/TAP driver either built-in to yourkernel, or available as a module. To check the availability of this module do the following:

Let s say you started the emulator with the following:

Note the vlan 1 and -net tap options. This basically connects your Olive s en0 to a virtual tapinterface usually tap0 on your host system. Start up Qemu, and once the emulator is running, proceed to the next step. You ll need to start up the emulator as root, or change the ownership or permissions on /dev/net/tun.

We re going to need to now bridge the tap0 interface to another Ethernet interface on the host system. To do this, we ll utilize the bridge capabilities of Linux. First, get the bridge utilities:

sudoapt-getinstall bridge-utils

Let s assume you want to connect en0 on the Olive to eth1 on the host system.

This creates a bridge device, br0, and binds the two interfaces to it. Right now everything is stilldown. Let s bring it up

Now the bridge and member interfaces should be up. Don t assign any IP addresses to either of themember interfaces. If you want to, you can assign something to br0 if needed. br0 is analogous an SVI in the Cisco world To see the status of the bridge, do the following:

bridge name bridge id STP enabled interfaces

Now, assign an IP address to the em0 interface on your Olive, and it should be online. You are also free to tcpdump on the bridge or member interfaces, for debugging. All of this can probablybe put into a Qemu interface script, so you can remove the script no option, and make it a littlemore automatic.

Your kernel might have ethernet filtering ebtables, bridge-nf, arptables enabled, and traffic getsfiltered except ARP and STP. The easiest way to disable this is to go to /proc/sys/net/bridge.Check if the bridge-nf- entries in there are set to 1; in that case, set them to zero and try again. More information on bridges available here.

bridge-nf-call-arptables bridge-nf-call-iptables

bridge-nf-call-ip6tables bridge-nf-filter-vlan-tagged

for f in bridge-nf- ; do echo 0 f; done

Using OpenVPN you can create several tap interfaces with Add a new TAP-Win32 virtual Ethernet adapter and rename them with something like Tap1, Tap2 and so on Let s say we have created 1Tap interface and renamed it as Tap1. Right click this Tap1 interface on Windows Control Panel –Network Connections and give IP address for example 10.1.1.1/8.

Now you can start Qemu with the -net tap option and ping the interface from your Olive:

qemu -L. -m 96 -hda R1.img -localtime

-net nic,vlan 1,macaddr 00:aa::,model e1000

On Mac OS X, download and install the TunTap package.

-net tap,vlan 1,ifname tap0,script no

We need to give this inter face an ip address:

sudoifconfig tap0 198.18.0.250/24 up

Olive to real world using PCAP/LACP

In the patch provided in this howto, there is an option to use PCAP or LCAP libraries to bridge directlyto a physical interface. You will probable need to run Qemu under Administrator privileges. Please also note that it will stop any other traffic on your interface.

-localtime-net nic,macaddr 00:aa::,model e1000

Please note that you have to configure an IP address your physical interface before being able to communication between your routers. Also I didn t test PCAP/LCAP on Windows.

The lastest patch also added a udp option to allow networking to a Dynamips or pemu.

-net udp,vlan 1,sport 10000,dport 10001,daddr 127.0.0.1

Then in your dynagen. net file

Under GNS3, you can create a Cloud and configure a NIO UDP you can add as many NIO UDP as you want. The Cloud will be your interface between Olive and GNS3, you can link a firewall ora router per NIO UDP.

Juniper olive Simulator. I will not let you wait more to know about Juniper Simulator Olive. please provide the multicast patch. Previous link expired. vimal.

Juniper Networks JUNOS Simulator Olive on VMware torrent download for free.

Additionals from junos olive multicast patch Download - updateStar - updateStar Thanks for sharing a great post on building Olive lab for Virtualbox.

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