Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [igmp]

Internet Group Management Protocol(IGMP) is used by hosts to for request multicast data for a particular multicast group. This communication takes place between the (igmp enabled)routers present in the subnet and the hosts. Hosts can subscribe to a multicast group or leave it using IGMP.

39 questions
7
votes
4 answers

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 subscription. I am currently getting around this by…
Chuu
  • 213
  • 1
  • 2
  • 6
7
votes
2 answers

IGMP Membership under Linux (igmp_max_memberships)

I'm experiencing issues related to OSPF (which relies on Multicast) not allowing us to work with enough adjacencies and was told to look at: /proc/sys/net/ipv4/igmp_max_memberships Now, while it's easy to just increase this number to infinity, is…
Yon
  • 258
  • 1
  • 3
  • 8
4
votes
1 answer

Should IGMP Snooping be configured on all Layer 2 switches on LAN?

We've used Multicasting for the first time in one of our applications and whilst I have got it working, I'd really like to fully understand how it works and what's going on behind the scenes. In an attempt to do this, I've run Wireshark on my PC to…
Matty Brown
  • 675
  • 2
  • 13
  • 24
3
votes
0 answers

Stream IPTV through SSL VPN

I have a question about streaming IPTV through Cisco ASA5510 ssl vpn. My current setup at the moment is: Public - firewall (asa5510) - L3 switch - L2 switch But my iptv source feed is coming to L3 switch (not through my fw) So that setup is working…
AnD
  • 171
  • 2
  • 11
3
votes
1 answer

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 / # cat…
lxusr
  • 131
  • 1
  • 2
3
votes
2 answers

IGMP/Multicast routing in Linux

I need to route IGMP/Multicast traffic across two networks. I have a Linux box with two NICs, one public, one private. Need devices on the private network to flow to public. I'm pretty certain I have iptables set up right, been trying to do this…
user18330
  • 174
  • 1
  • 6
2
votes
0 answers

Redhat No IGMP response

I'm setting up my server to ingest a multicast. The server will initiate the request and can join the multicast for about 2:30-3:30 min. After that, it gets dropped from the multicast group due to no IGMP response. The server is running Redhat…
Jamie
  • 21
  • 1
2
votes
2 answers

OS X network stack ignores IGMP membership queries

We have a remote site where the Macs are not responding to IGMP membership queries, but the Windows boxes do respond. Consequently, after about 10 minutes, the IGMP-aware network switch cuts off the multicast stream to the Macs. Here is a screen…
Warren Young
  • 472
  • 1
  • 5
  • 19
2
votes
1 answer

Multicast works only in promiscuous mode

I'm trying to receive MPEG-TS over UDP multicast transport in Arch Linux. So when I run ffprobe -i udp://@224.1.1.240:6000 it hangs forever with no result. Then I run tcpdump and it shows no multicast traffic from the address. But if there is…
TrueBers
  • 21
  • 3
2
votes
0 answers

IGMP Snooping limitations and when do you start to use PIM?

At a head end I've just inherited, all our multicast streams run on cisco switches with IGMP snooping enabled. Because all these streams are to be kept local and isolated we've never really looked into implementing routing protocols. However, I want…
rantsh
  • 145
  • 10
2
votes
1 answer

Does the IGMP querier have to be connected to the multicast source?

I've been reading Allied Telesis' guide on configuring IGMP, which has been quite enlightening so far. However, I'm still wondering whether the IGMP querier has to be connected directly to the multicast source, as it is shown in the example…
eWolf
  • 123
  • 3
2
votes
0 answers

network leave/unscribe multicast group

I have debian based server where I need to subscribe a multicast. After doing it with headless mpalyer I can see the following: root@ca1:~# netstat -g IPv6/IPv4 Group Memberships Interface RefCnt Group --------------- ------…
ykhrustalev
  • 121
  • 3
2
votes
1 answer

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 Report on vlan40, the multicast datagrams arrive and…
James Brock
  • 131
  • 5
1
vote
0 answers

Windows 10 Falls Back to IGMPv2

I have a setup where I have a Linux server running an 802.11n WPA2 encrypted Wi-Fi network. There are two devices connected to this network. One is a device which generates reports and the other is a Windows 10 laptop which downloads these reports.…
DMiess
  • 11
  • 3
1
vote
0 answers

How can I route Multicast between segregated interfaces on Sonicwall

I realize this question might be a little too specific, and I've read all the other questions about multicast on VPN, multicast on multiple interfaces, etc. But, I've applied all the information from those questions, and I'm down to what I believe…
Dexter
  • 111
  • 3
1
2 3