Questions tagged [igmp]
For questions about IGMP (Internet Group Management Protocol), a protocol used for communications between IPv4 hosts and multicast routers to establish and maintain host multicast group membership.
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Receiving Unwanted Multicast Traffic With IGMP Snooping Running
With respect to IP Multicast having PIM sparse mode and IGMP snooping in place consider the scenario having 2 x routers connected to LAN switch. The multicast receivers are also connected to same LAN ...
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Is there an IGMPv1 querier router after all?
I recently looked into the mechanics of IGMPv1 and v2. Reading RFC 1112, I understand that in IGMPv1, the Querier Router functionality does not exist. All IGMP configured routers in a local network ...
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IGMP in multiple switches with multiple Senders and Receivers in same VLAN
I am trying to send multicast traffic from 3 Senders to corresponding Receivers in same VLAN (100) spread across 3 switches.
I setup a Querier in one of the switch, but it doesn't seem to forward ...
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Query regarding IGMP Querier Election Process
I wanted to understand how a querier election takes place.
Say we have to L3 devices with ip address 10.1.1.2 and 10.1.1.1.
PIM is not enabled anywhere.
I checked around and found that the flow would ...
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PIM-SM over OSPF for mDNS traffic
I have connected 2 Routers via OSPF (using N links, N == 1 but it should be scalable to N > 2) and I am trying to have mDNS traffic go from LAN to LAN across the OSPF link, but I can't seem to make ...
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Does multicast over tunnels (e.g., GRE) require IGMP/MLD?
When subscribing to a multicast group on a tunnel device such as a GRE tunnel, are you supposed to participate in IGMP/MLD over that tunnel in order to announce your membership in the multicast group? ...
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Multicast traffic through Cisco3850
I have a test scenario and trying to pass multicast traffic through Cisco 3850 according to the following diagram:
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What prevents a device from receiving its own multicast stream, and can it be turned off?
I know that it is normally not possible for a device to receive its own multicast stream on the same network interface where it transmitted said stream. I also understand why this is sensible, and ...
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In an IGMP V2 membership report message, isn't the destination Ethernet address based on the multicast group IP address?
Specifically, I think for this message type the Ethernet destination address always starts with 01:00:5E, followed by the second byte of the IP address masked with 0x7F, followed by the third and ...
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IGMP Snooping issue. probably
I have multicast hosts that keep leaving a group, only to join back up which results in loss of video feeds.
The network consists of a variety of Cisco 2960's and a Cisco 9300 w/ PIM Sparse mode set ...
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How to enable Inter-VLAN multicast traffic on a layer 3 Siemens RX1510 Network Switch using IGMP?
I have a single Layer 3 Siemens RX1510 network switch split into 4 separate VLANs on different subsets.
Name | Gateway | Subnet
VLAN1 | 198.97.100.123 | 255.255.255.0
VLAN2 |...
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Trying to understand IGMPv3 Max Response Code algorithm
In IGMPv2, the Max response time is an 8-bit value each unit encoding 0.1 seconds. The typical max response time is 100 resulting in a 10 second max response time.
In IGMPv3, if the Max response code ...
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How can MLDv2 work according to the RFCs 3810 and 4606?
When IPv6 Stateless Address Autoconfiguration is happening, an interface/node has to join the all-nodes multicast address and the solicited-node multicast address AFTER forming a "tentative" ...
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Multicast in one VLAN
I need to receive multicast traffic over L2 segment on my client machine. But for some reason I am unable to do it.
To my understanding with such scheme I should receive traffic if inbetween Juniper ...
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To multicast or not to multicast over LTE? [closed]
I have an IOT device with static IP connected to a Mikrotik LTE device on ether1. The IOT host sends a multicast packet every second. The packet contains the IP and MAC of the host.
IP-Multicast: ...
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