The multicast tag has no wiki summary.
4
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4answers
26 views
Multicast over TCP or UDP or whatever else
My Server and Client run both on Linux.
The Server broadcasts multicast, the Client listens multicast.
My Client has to migrate to another site,
and unfortunately multicast is not allowed between the ...
2
votes
2answers
61 views
Multicast routing across two subnets with FreeBSD 9 (Bonjour between subnets)?
I have a FreeBSD 9 router (a Soekris net6501) connected to the internet via a dsl modem (bridged), doing NAT for two internal subnets, 10.0.1.0/24 (LAN) and 10.0.2.0/24 (wifi net).
There are routes ...
2
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0answers
42 views
altnet parameter into pimd.conf file
I need to route a multicast streams in my private network.
I'm using pimd for multicast routing.
The multicast routing did not work until I put altnet <multicast_source_ip> masklen 24 to the ...
0
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0answers
22 views
vm multicast doesn't work
I have a windows host machine, sending out multicast and on the same machine I have an oracle virtualbox, running a linux VM with a bridged virtual network card, receiving the multicast.
This setup ...
0
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1answer
45 views
How to setup a static multicast ARP entry with Cisco SG300?
We're running a Microsoft NLB cluster in multicast mode as a loadbalancer. Using our old Cisco IOS switches we propagate access to the cluster to our branches using a static ARP entry in the core ...
1
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0answers
36 views
Can I Override Multicast Address for One Specific Destination IP?
I have a Windows XP machine that is fitted with two Network cards. One card is used to access the company network and internet and its IP is assigned by DHCP whilst the second has a fixed IP and is ...
1
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2answers
66 views
Troubleshooting UDP multicast on Windows
I'm a programmer, not a system adminstrator, so please forgive my administrative naivete. My software, written in C#, relies on UDP multicasting. One machine, the server, streams events to an known ...
1
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0answers
18 views
Server Unresponsive with Spike in Multicast Packets Received
I got a server from UbiquityServers about a week ago, I installed a simple Apache server and it just serves up images. The server is under very little load because it simply is an origin server behind ...
1
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0answers
69 views
IGMP V3 support in Linux-2.6.35
I am trying to start a bridge connection and force it to use IGMPV3.
The following command will explain my issue better :
The below is the output of force_igmp_version before issuing brctl commands ...
1
vote
2answers
214 views
multicast routing - CentOS 5
I'm trying to pass mulitcast stream from interface eth1 (192.168.20.41) to interface tun0 (192.168.100.40) on CentOS 5.
I can see incoming multicast stream on eth1:
tcpdump -n -i eth1
type=1700 ...
1
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0answers
44 views
Catalyst 3560G SPAN session not mirroring IGMP packets
I am developing a device which acts as a multicast host, and want to observe it as it responds to IGMP Queries.
My Catalyst 3560G is set up as follows (full config below): Port 0/1 is a TFTP server ...
0
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0answers
28 views
How to configure dummy multicast interface on Windows?
There's an example in Michael Thompson's blog on Processor's Affinity which uses a dummy multicast network interface. Configuration on *nix is done with these commands:
$ su -
$ modprobe dummy
$ ...
0
votes
1answer
263 views
multicast and iptables : troubleshooting?
I have secured a linux box, starting with
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP
and after adding rules to enable specific protocols and streams.
Which are the ...
0
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0answers
65 views
ntp multicast client config on redhat 5?
All,
I'm trying to get ntp multicast client working on some redhat 5 boxes downsec of an ASA firewall. The ntp servers are on the inside interface of the ASA, and the ASA is configured
to pass the ...
4
votes
1answer
47 views
ntp multicast address
A silly question probably, but guess I need to ask.
If I've got four centos boxes that are acting as ntpd multicast servers, will the multicast address configured in each box's ntp.conf all be the ...
1
vote
1answer
117 views
multicast tcpdump and subscriptions
From the multicast howto:
IP_ADD_MEMBERSHIP.
Recall that you need to tell the kernel which multicast groups you are interested
in. If no process is interested in a group, packets destined to it that ...
1
vote
1answer
90 views
How to send multicast traffic from one vlan to 100-500 other
In addition to prev question
How to share multicast traffic to many vlans
I recieve answer that solution for my task is mrouted on my freebsd router.
But for now i see this problems:
mrouted ...
1
vote
1answer
58 views
Multicast with wifi access points
Using 2 consumer grade access points what is the behavior of when multicast packets are sent between them.
Consider -> AP1 -> AP2
(Note that AP1 & AP2 are connected over the LAN ports to the ...
1
vote
1answer
96 views
How to share multicast traffic to many vlans
I have linux computer , this computer connected with entire my network via zyxel gs-2200.
In this zyxel also connected router with 500 vlans, one by client.
On linux computer i have vlc program ...
0
votes
2answers
111 views
virtualization with multicast receive
I need a virtualization solution with the following properties:
guest OSes can receive multicast traffic from the host machine.
some services running on the guest OS (eg: port 80) can be port ...
3
votes
0answers
125 views
iperf max udp multicast performance peaking at 10Mbit/s?
I'm trying to test UDP multicast throughput via iperf but it seems like it's not sending more than 10Mbit/s from my dev machine:
C:\> iperf -c 224.0.166.111 -u -T 1 -t 100 -i 1 -b 1000000000
...
0
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0answers
67 views
How may one configure Windows Firewall to block outbound multicast and broadcast traffic?
Blocking outbound connections by default and disabling all outbound rules does not prevent all traffic from being sent on the network interfaces.
Some broadcast traffic is of course necessary for ...
0
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0answers
191 views
Problems with multicast under Mac OSX Lion
We have been developing our Java applications under OSX for some time. Since switching to OSX Lion (version 10.7.1 now), we see sporadic issues around multicast packets going into the bit bucket and ...
0
votes
1answer
31 views
Can I use routes to influence which interface address multicast listeners use?
I have a server with multiple NICs on it. Each NIC is plugged into a different, isolated network that is serving multicast traffic. I have a program that listens to the multicast traffic on each of ...
2
votes
4answers
167 views
Is there a good way to keep IPv6 multicast packets off WiFi?
I work on a product that consists of a number of headless Linux boxes that work together as a cluster.
These boxes synchronize their state with each other by sending proprietary-format link-local IPv6 ...
0
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0answers
236 views
UDP Multicast not working without promisc. Already tried rp_filter=0
I'm having issues with multicast traffic in Ubuntu Maverick. It only appears to work when the card is in promisc mode (i.e. if I set it manually, or use a tool such as tcpdump).
Adding multicast ...
0
votes
2answers
70 views
multicasting in different networks in java
I'm writing a code to work through sockets in java. I've created a multicast group to which anybody can join on the LAN. But the LAN has many different networks, operated by a router, and the ...
3
votes
1answer
323 views
Capturing multicast data with Wireshark with IGMP Snooping Enabled at the switch
I am trying to capture multicast traffic via Wireshark (actually TShark), however the switch has IGMP snooping enabled and will only send Multicast traffic on the ports that have an active IGMP ...
4
votes
1answer
160 views
windws server 2008 udp multicast performance problem
I encounter a strange performance problem on 2008 R2 Enterprise SP1.
Here is the setup:
Many processes listening to distinct Multicast UDP streams (5 multicasts
listen by process) bound on a single ...
1
vote
0answers
225 views
Can't get multicast to work (iperf)
I have some problems to get SLP (service location protocol; I play around with the OpenSLP implementation) to work. It uses multicast on 239.255.255.253, port 427. To narrow down the problem I decided ...
1
vote
2answers
548 views
How can I test Multicast UDP connectivity between two servers?
I have a two servers on the same subnet. I have an application installed which uses Multicast UDP to propagate events between the servers and keep them in sync.
This does not seem to be happening, ...
0
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0answers
159 views
Multicast Packets do not Reach all VPN Clients
I am trying to setup a PPTP VPN using RRAS on Server 2008 R2. I've got RRAS setup and working, and clients can connect to it using Windows XP or Windows 7 (my two target platforms.)
However, my ...
0
votes
1answer
106 views
NLB Traffic Stops on all nodes when a single node is rebooted
We had a 2 node NLB cluster running IIS websites on virtual machines. Both nodes were online, the balancer functioned exactly as expected, (if traffic is 50/50 balanced, and you stop or drainstop a ...
1
vote
1answer
403 views
Multicast hostname lookups on OSX
I have a problem with hostname lookups on my OSX computer. According to Apple's HK3473 document it says for v10.6:
Host names that contain only one label in addition to local, for example ...
8
votes
2answers
2k views
What is the difference between unicast, anycast, broadcast and multicast traffic?
I have never had the privilege of working in an environment that required complicated routing or if it did require it, it was handled upstream of me. I've always used very simple static routing ...
5
votes
2answers
477 views
How managed switches handle Broadcast Multicast and Unicast?
Under typical scenarios, a network switch needs to handle broadcast, multicast and unicast messages at the same time.
I'd like to understand
On a typical managed switch (1Gb Ethernet/10Gb Ethernet), ...
10
votes
1answer
207 views
Simple Multicast Design
In order to support desktop imaging requirements I need to correct the multicast design on an existing network, but am not well versed in this subject. The diagram below gives a basic example of the ...
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0answers
158 views
Multicast Default Interface - upgrade to RH5.5
I have upgraded a server from RH4 -> RH5.5 and we have an interesting issue with multicast.
we have multiple NICS on the server, we want the bond0 to default as the default interface.
adding route ...
1
vote
1answer
134 views
How do I know if IP Multicasting is enabled on my network in Windows?
How do I know if IP Multicasting is enabled on my network?
It is same question as above but for windows.
2
votes
2answers
178 views
Multicast IP Addresses
I posted this on StackOverflow and was told it might be more appropriate here.
I'm having trouble understanding how multicast addresses work.
First off, is it true that if I have N clients or peers ...
0
votes
3answers
680 views
Unicast to multicast via iptables
I'm receiving a unicast RTP stream on one interface and wish to send it out via multicast on a second interface. The system in question is an embedded processor running Linux, but I'm finding it ...
0
votes
2answers
275 views
looking for multicast traffic
We have a j2ee webapp on tomcat which is using ehcache with multicast discovery. Except it's not discovering anything. There appears to to be no multicast traffic visible on the network but we're a ...
1
vote
2answers
137 views
In what kind of environment multicast is not preferred?
While reading a product documentation I came across a line in which they say product supports TCP communication in environments where multicast is not available or preferred.
Why would a company ...
0
votes
1answer
180 views
Stateful matching of multicast responses in iptables
A central part of my firewall configuration is:
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
It seems that RELATED does not work for multicast responses: when the host sends to a ...
0
votes
1answer
112 views
SNMP OID to get multicast bytes
Right now I can only find oid for ifInMulticastPkts and ifOutMulticastPkts, but there is no bytes information. Can anyone know about this?
thanks in advance.
0
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2answers
248 views
Production quality server for transcoding of streaming video? [closed]
I have a few dozen MPEG2 streams that I would like to convert to h264 for redistribution and I'm looking for a software solution to do it. Something that will allow me to direct a number of ...
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0answers
30 views
Multicast node quantity limits
What is the practical ceiling for the number of nodes communicating via a single multicast channel on a LAN/WAN?
Part 2: What are the primary bottlenecks that cause that ceiling?
0
votes
1answer
398 views
Cisco 3560+ipservices — IGMP snooping issue with TTL=1
I've got a C3560 with Enhanced (IPSERVICES) image, routing multicast between its VLANs with no external multicast router. It's serving a test environment where developers may generate multicast ...
1
vote
1answer
216 views
Lot of Multicast traffic on LAN
Recently the whole network at work is being hit by multicast traffic originating on the LAN itself. I did some investigating and the service which seems to be responsible is ws-discovery.
I have ...
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0answers
288 views
How do I enable multicast routing in Windows XP
I have successfully set up a Windows XP machine as an IPv6 router using netsh, that is, it announces prefixes and forwards packets on two interfaces, as verified by pinging.
Now I'd like to forward ...
