-3
votes
0answers
11 views

Redirecting locally generated IP multicast over a GRE interface [duplicate]

On a linux box, I want to redirect locally-originating IP multicast traffic (OSPF hello) over a gre tunnel interface. How can I do this using iptables rules?
0
votes
0answers
16 views

PIMD daemon needs long time to send PIM join message

I am using the PIMD daemon on Ubuntu Server 12.0.4 (32-bit). When it receives IGMPv2 membership report for certain group, it takes sometimes two, sometimes five seconds to send PIM join message to its ...
0
votes
0answers
46 views

Why are my multicast packet discarded?

I have two boxes and I have some issues when tcpreplaying a pcap full of multicast from one machine to the other. I see the packet incoming on the destination machine thanks to a tcpdump instance. ...
1
vote
0answers
126 views

Multicast route setup for multiple interface

Currently I have the below eth5 to receive multicast data for 239.1.1.31. It works. $ ifconfig eth5 Link encap:Ethernet HWaddr E4:11:5B:94:E1:F3 inet addr:10.185.2.2 ...
1
vote
1answer
199 views

Is IGMP multicast traffic to a Xen VM host legitimate?

I run two Xen/CentOS 6.5 based VMs, both hosted by the same company, but connected to different networks (basic /24s w/ a single gateway at .1) in different physical locations. I developed an iptables ...
0
votes
0answers
83 views

Net-SNMP Equivalent to netstat -g

I'm working on a project where it's necessary to determine the multicast groups that several Linux servers are subscribed to. While I know that you can easily get this by running netstat -g, one of my ...
1
vote
0answers
57 views

ARP Tables on Windows vs Linux

I noticed on Windows Server 2008, Windows Server 2008 R2, and Windows 7 that IP multicast groups joined by a computer are recorded in the ARP table as static addresses automatically. However, the same ...
0
votes
1answer
184 views

diagnostic multicast issue using wireshark

I have a network that is setup for multicast traffic. My setup is the following -Machine A : a server generates multicast traffic. -Machine A : few clients subscribing to that multicast traffic ...
1
vote
1answer
218 views

Enable multicast on dummy interface on startup

I have a dummy interface on a Centos 6.3 machine which I would like to use for multicast traffic. The problem is it does not come up with the MULTICAST option by default; I need to manually add it ...
1
vote
1answer
132 views

If I have a process which is supposed to be receiving data from multicast, how can I check if it actually is?

I can check gstack, but just because I see the listener threads on the recv call does not mean that call is not returning. One other thing I thought was to do something like: netstat -lupe | grep ...
2
votes
3answers
3k views

Should I create a multicast route on RHEL/CentOS for a blind sender?

A CentOS 5 system does not appear to come out-of-the-box with a route for multicast traffic. What it does appear to do is use a default route, if configured. In other words, a routing table like ...
0
votes
2answers
2k views

Problems with multicasts in “iptables”

My question is related to multicasts and iptables. I want to allow ICMP and IGMP multicasts from the local VLAN 192.168.1.0/24 as well as from 0.0.0.0 on my CentOS machine, so I added the following ...
2
votes
1answer
93 views

How does iptables determine which packets are multicast?

Are packets assumed to be multicast solely based on their ip address? I've been looking at the RFC 1112 and a quick scan doesn't appear to indicate any other flags on the ip packet.
1
vote
0answers
1k views

Unable to ping multicast IP

Let me prefix this by saying I'm not entirely clear on how multicast works. I have the gist of it, but not the underlying functionality. A customer has configured a RHEL6 cluster between two Jboss ...
0
votes
0answers
143 views

MDNS multicast requests not received on wired interface

I have a Fedora 17 system with avahi configured to advertise a private service. The F17 is wired to a switch, to which is also connected a wireless AP. The client is wireless. The F17 firewall is ...
0
votes
1answer
167 views

multicast network based on bridges between two hardware servers

+------------------------+ Internet +----------------------+ | Server_1 | | | Server_2 | | VPS1 ---- br0 __ | (router) | __ VPS4| ...
2
votes
1answer
405 views

What is the difference between bind, network (interface) and multicast addresses?

The DatagramSocketImpl in Java has a joinGroup method that takes a socket address (IP and PORT) plus the interface address (IP and PORT). I am trying to understand the difference and purpose of each ...
1
vote
2answers
4k views

What does this linux command mean “route add -net 224.0.0.0 netmask 240.0.0.0 eth0”

Could somebody explain what exactly this command means in relation to transmitting and receiving multicast traffic route add -net 224.0.0.0 netmask 240.0.0.0 eth0
7
votes
5answers
753 views

Convey multicast (to another LAN) through WAN disabling multicast

My Server and Client softwares 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 ...
2
votes
1answer
648 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 ...
1
vote
1answer
694 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
4k 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 ...
2
votes
2answers
3k 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 ...
1
vote
1answer
494 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
1answer
71 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 ...
1
vote
0answers
508 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 ...
2
votes
1answer
887 views

openSUSE 11.3 multicast IGMP v2 works on one vlan, but not the other vlan

I have a server running openSUSE 11.3, with vlan5 and vlan40 configured on eth7. I want to join two multicast IGMP v2 groups, one on vlan5 and one on vlan40. When I send out the IGMP v2 Membership ...
0
votes
2answers
356 views

How to restore with multicast 3 systems: Windows 7, Windows 2008 and Linux?

We have used an old version of Norton Ghost to do backups and restores of computers. There are few groups of computers with the same hardware and we have used multicast. We have had Windows XP, ...
0
votes
2answers
621 views

Selecting interface for multicast traffic?

How do I specify an interface for multicast traffic? I need to connect to multicast group through vlan interface (tcpdump show traffic there) but I believe that IGMP request are sent throug eth0. ...
3
votes
11answers
2k views

Most resilient form of (private) DNS clustering?

I'm working on a setup with two datacenters linked by a MAN (bridged) and everything is doubled between them, in fail-over mode with RedHat Cluster, DRBD and that kinf of things. I have one DNS ...