Igmp querier juniper If a [device] with a higher IGMP querier source address does not receive any IGMP queries during that period, it starts sending queries again. For sample output, see show igmp interface. Reports are sent with address 0. You can also use this statement to configure the source address to use for IGMP snooping or MLD snooping queries. This topic describes how to verify IGMP snooping operation on the switch. Aug 29, 2011 · The above command confirms if the client is sending IGMP reports and if it is listed in the IGMP Snooping Database. In an environment with a significant volume of multicast traffic, using IGMP or MLD snooping preserves bandwidth because multicast traffic is forwarded only on those interfaces that have multicast Hey, short question to all the JUNOS Pros out there. ), with the May 31, 2024 · set protocols igmp-snooping vlan KRAMER l2-querier source-address 10. » Aug 26, 2021 · Configured Parameters: IGMP Query Interval: 125. This example uses the following software and hardware components: One EX4300 Series switch Junos OS Release 13. Aug 17, 2020 · The master of the IGMP filter lists is the router or switch that is configured to act as the IGMP Querier. When multicast traffic arrives at the VXLAN core, a PE device configured with EVPN forwards traffic only to the local access interfaces where there are IGMP listeners. This comprehensive guide covers everything Internet Group Management Protocol (IGMP) snooping and Multicast Listener Discovery (MLD) snooping constrain multicast traffic in a broadcast domain to interested receivers and multicast devices. Without any igmp-snoop parameter settings igmp inherits the igmp default timers. Meaning The output shows a list of the interfaces that are configured for IGMP. Its main focus is IGMP and IGMP snooping. What I see in my setup is that my test stream goes all the way to the querier and not only to the listener. First, as we know, multicast routers periodically query hosts on a segment. It is used by the switch to identify if any multicast receivers still exist in a VLAN and whether to continue forwarding multicast traffic to them. May 24, 2013 · Hi Nasir, IGMP and IGMP-Snooping are both different features: IGMP will only work if you have it configured on an L3 interface (eg: vlan. See Multicast and IGMP In Depth for more details if desired. 0 IGMP Other Querier Present Timeout: 255. Configure a QFabric Node device to be an IGMP querier. Output fields are listed in the approximate order in which they appear. In this way, the device builds an IGMP snooping table that has a list of all the ports that have requested a particular multicast group. The default factory configuration on legacy EX Series switches enables IGMP snooping by default on all VLANs. 2, QFabric Systems support the igmp-querier statement to configure a Node device as an IGMP querier. These switches go back to a core switch QFX5120. Internet Group Management Protocol (IGMP) snooping constrains the flooding of IPv4 multicast traffic on VLANs on a switch. If you don't have any L3 interfaces configured, then the "show igmp statistics" command will show Sep 5, 2023 · Description The following KB for Juniper EX/QFX Series Switches addresses how to configure all VLANs under 'protocols igmp-snooping'. Jan 19, 2018 · Hi, I have some issue over igmp-snooping with a QFX5100. If the device with a higher IGMP querier Configure a QFabric Node device to be an IGMP querier. but yes i get all my IGMP stats and my other switches are seeing the querier with default settings, i don't even need and RVI on my other switches or IGMP enalbed on all Nov 26, 2023 · When I take the querier out of the qfx, and add an irb and IP to the subnet to the access switch with the encoders, and make it the querier, then the multcast traffic on the uplink stops, though all still works well locally. The IGMP Snooping within a VLAN without any multicast routers will cause some issues. 0 multicast-router-interface List of all products and applications along with their introduced releases supporting the feature » IGMPv2 Snooping with L2 Querier. 0. The remaining devices in the network simply define their respective multicast router ports as the interface on which they received this IGMP query. In this case, you don’t need any other configuration for IGMP snooping to work. Description Configure the device to be an IGMP querier. 0 as the source address unless there is a source address configured. If there are any multicast routers on the same local network, make sure the source address for the IGMP querier is lower (a smaller number) than the IP addresses for those routers on the network. Verify the following information: Each interface on which IGMP is enabled is listed. The router with highest IPv4 address becomes the DR and the router with lowest IPv4 address becomes the IGMP Querier. A switch calculates the timeout value by using the query-interval and query-response-interval values. The show igmp-snooping vlans detail command identifies the client interface, group address, and the VLAN that the group is part of. You can also configure IGMP proxy, IGMP querier, and multicast VLAN registration (MVR) functions on VLANs at this hierarchy level. Is there some requirement that all streams go to the querier? Would PIM and/or IGMP config in the QFX help? Note: Starting in Junos OS Releases 14. But in IGMPv3 it’s advertised to everyone, so that non-designated queriers can sync themselves with the Designated Querier’s settings. Jul 8, 2019 · To work properly, IGMP snooping needs an IGMP querier in the given broadcast domain. All the information I can find from Juniper involves setting up snooping. If there are two or more routers sharing the same segment, the one with the lowest IP address is the IGMP querier (per IGMPv2 election procedure – as you remember, IGMPv1 let the multicast routing protocol define the querier). (And by the way, if you’re unsure what the Designated Querier is, check out my last post for the full explanation on it!) Specify how often the querier router sends IGMP general host-query messages through an Automatic Multicast Tunneling (AMT) interface. On legacy EX Series switches, which do not support the Enhanced Layer 2 Software (ELS) configuration style, IGMP snooping is enabled by default on all VLANs, and this statement includes a disable option if you want to disable IGMP snooping selectively on some VLANs or disable it Configure a QFabric Node device to be an IGMP querier. IGMP querier allows the device to proxy for a multicast router and send out periodic IGMP queries in the network. For each attached network, a multicast routing device can be either a querier or a nonquerier. This action causes the device to consider itself an multicast router port. Note: Starting in Junos OS Releases 14. Output Fields Table 1 lists the output fields for the show igmp snooping interface command. Everything is working as intended but I find no way to display which querier is acutally used. 1X53 and 15. Feb 17, 2025 · IGMP Message Types Multicast routers use IGMP to learn which groups have interested listeners for each of their attached physical networks. Set the Querier Interval as low as it can go, down to about 30 seconds if your switch supports it. Enable Fast Leave (Note: Fast Leave is required to support video-over-IP devices). Is there a command to achieve that? On Aruba I can do da `show ip igmp vlan 123' and receive a The below config setting is the same on Juniper EX switches using RVIs as it is on Juniper SRX service gateways/routers, and effectively enables IGMP querier on the specified interface/vlan. Aug 12, 2021 · New to Crestron and MULTICAST#crestron #cp4 Use the pim-to-igmp-proxy statement to have Internet Group Management Protocol (IGMP) forward IPv4 multicast traffic across Protocol Independent Multicast (PIM) sparse mode domains. Solution Previously, IGMP snooping could be configured on all VLANs on legacy switches (EX2200, EX3300, EX4200, EX4500, etc. We would like to show you a description here but the site won’t allow us. Use Jan 7, 2020 · Juniper’s website says “ [Devices] with higher IGMP querier source addresses stop sending IGMP queries unless they do not receive IGMP queries for 255 seconds. Note: When integrated routing and bridging (IRB) is used, if the router is an IGMP querier, any leave message received on any Layer 2 interface will cause a group-specific query on all Layer 2 interfaces (as a result of this practice, some corresponding reports might be received on all Layer 2 interfaces). Understanding IGMP Snooping and Multicast Forwarding IGMP snooping monitors the Internet Group Management Protocol (IGMP) traffic between hosts and multicast routers. IGMP Message Types Multicast routers use IGMP to learn which groups have interested listeners for each of their attached physical networks. Apr 5, 2024 · Dive deep into the roles of IGMP queries, joins, and membership reports in multicast networking. 0 IGMP Last Member Query Interval: 1. In this implementation, the Juniper Networks EX4200 Ethernet Switch and Juniper Networks EX3200 Ethernet Switch are used as Layer 2 access devices with IGMP snooping enabled, while the MX Series sits at the Layer 2/Layer 3 boundary of the Sep 30, 2010 · Yeah i was going nuts because when working with HP or Cisco, enableing IGMP snooping also gives you the querier (well once you asign and IP address to the default VLAN). 0/Auto if the switch only has one VLAN. We have an l2 querier set up on the VLAN IRB interface on the QFX as such: igmp-snooping { vlan <our vlan name> { l2-querier { source-address <vlan IRB address>; IGMP is an integral part of IP and must be enabled on all routing devices and hosts that need to receive IP multicast traffic. It appears that the IGMP query commands might only be valid on QFabric systems? Feb 20, 2021 · Hi, can i configure my ex2200 to act as igmp querier for specific vlan ? thanks Note: When integrated routing and bridging (IRB) is used, if the router is an IGMP querier, any leave message received on any Layer 2 interface will cause a group-specific query on all Layer 2 interfaces (as a result of this practice, some corresponding reports might be received on all Layer 2 interfaces). In any given subnet, one multicast router acts as an IGMP querier. Mar 7, 2020 · We had a Querier’s Robustness Variable in IGMPv2 as well. This lesson explains the problem and how to solve it. Normally, a multicast enabled router would take this role, but L2-only multicast deployments usually don't have one (well, obviously). Next to Version, the number 2 appears. The querier routing device periodically sends general query messages to solicit group membership information. This example shows how to configure IGMP snooping on provider edge (PE) devices in an Ethernet VPN (EVPN)-Virtual Extensible LAN. However, if some of the Layer 2 interfaces are also router (Layer 3) interfaces, reports Scope This guide describes a Layer 2 implementation for enterprise environments using the EX Series and MX Series. TechLibrary: Juniper product documentation, design guides, tools, and applications Customer Support: Online support resources by product Downloads: Juniper software downloads Knowledge Base: Information on using Juniper products and resolving issues Products: Juniper products and services Solutions: Juniper solutions to help solve your toughest networking challenges Elevate Community: Our Feb 19, 2024 · In this case (multiple mrouters in a single VLAN), IGMP Election is the point. Sep 10, 2009 · With no igmp-snoop timers parameters configured I observed igmp-snoop membership timers value at 260s. This ensures that Node is always the IGMP querier on the network. The querier sends out IGMP queries and the hosts that want to listen to a stream reply with a membership report. The IGMP querier sends out the following types of queries to hosts: General query—Asks whether any host is listening to any group. Oct 31, 2008 · In this post we will quickly discuss the use of most commonly needed IGMP timers. 1 set protocols igmp-snooping vlan KRAMER interface ge-0/0/1. Jul 2, 2022 · from Juniper: Using the Device as an IGMP Querier "If you configure multiple devices to be IGMP queriers, the device with the lowest (smallest) IGMP querier source address takes precedence and acts as the querier. ” IGMP Querier and Snooping issues We have some multicast devices a single subnet, on 2 Juniper EX4000 switch stacks. 0 IGMP Query Response Interval: 10. However, if some of the Layer 2 interfaces are also router (Layer 3) interfaces, reports This example shows how to configure IGMP snooping on provider edge (PE) devices in an Ethernet VPN (EVPN)-Virtual Extensible LAN. I have 10 interface like that included in the vlan 12. Specify how often the querier routing device sends general host-query messages. 0/24 (host that will use the multicat stream Aug 29, 2011 · The above command confirms if the client is sending IGMP reports and if it is listed in the IGMP Snooping Database. Can the EX4400 be configured as an IGMP Querier? I want to setup Multicast traffic between two EX4400 switches, and know that a Querier is required. 0 wich is configured as trunk with a native-vlan-id 12. Is this enough to prevent flooding or do I also need to enable any other options? I see there is an IGMP snooping querier setting that I may need to setup, but not sure if this is really needed? thanks. The IGMP snooping group timeout value determines how long a switch waits to receive an IGMP query from a multicast router before removing a multicast group from its multicast cache table. Jun 17, 2021 · Set the Querier IP to the same address as the switch, or 0. Dec 25, 2024 · That's perfectly right, IGMP snooping is not expected to work without an IGMP Querier in the LAN (that can be only just a dumb IGMP Querier, or a PIM router managing the IGMP queries). Note: To display similar information on routing devices or switches that support the Enhanced Layer 2 Software (ELS) configuration style, use equivalent commands such as show igmp snooping interface. When you activate PIM, IGMP is activated too: «IGMP DR and Querier are selected by an election. show igmp interface detail The output for the show igmp interface detail command is identical to that for the show igmp interface command. The switch uses what IGMP snooping learns to forward multicast traffic only to interfaces that are connected to interested receivers. 10. 0 IGMP Robustness Count: 2 Derived Parameters: IGMP Membership Timeout: 260. I know other switches can be configured as an IGMP Querier in place of a router. Description Configure IGMP snooping parameters for a VLAN (or all VLANs if you use the all option, where supported). The responsibility of the Querier is to send out IGMP group membership queries on a timed interval, to retrieve IGMP membership reports from active members, and to allow updating of the group membership tables. 2 or later for EX Series switches Before you configure IGMP snooping, be sure you have: Configured the vlan100 VLAN on the switch Assigned interfaces ge-0/0/0, ge-0/0/1, ge-0/0/2, and ge-0/0/12 to vlan100 Configure ge-0/0/12 as a trunk interface. Symptoms You want to configure IGMP snooping on all VLANs on devices with ELS support but the keyword "all" is not working. I have my private subnet on the switch 10. This conserves bandwidth by allowing the switch to send multicast traffic to only those Statically configure the interface as an IGMP snooping multicast-router interface—that is, an interface that faces toward a multicast router or other IGMP querier. Configure an IGMP-querier - this will be an L3 interface somewhere (usually the gateway for the VLAN) that will periodically send out IGMP Membership Queries, which your multicast hosts should respond to tie IGMP Membership Reports, which all the switches running igmp-snooping will then use to maintain the L2 multicast state (and limit flooding. With IGMP snooping enabled, the device monitors IGMP traffic on the network and uses what it learns to forward multicast traffic to only the downstream interfaces that are connected to interested receivers. Internet Group Management Protocol (IGMP) snooping constrains the flooding of IPv4 multicast traffic on VLANs on a device. Both the igmp group table and the igmp-snoop tabe were cleared when 260s had experied. Description Specify the IP address to use as the source for IGMP snooping or MLD snooping reports in proxy mode. Is there a way on junos to show the active l2-querier in a vlan? If there are more than 1 querier they should pick the one with the lowest id. x on an EX). Specify how long the IGMP querier router waits to receive a response to a host query message from a host through an Automatic Multicast Tunneling (AMT) interface. The devices with higher IGMP querier source addresses stop sending IGMP queries unless they do not receive IGMP queries for 255 seconds. Setup is simple 😉 (keep in mind, I did try to make it work only with the switch) I receive multicast stream over interface xe-0/0/1. I think it can be done but only on a LAN that only has multicast sources and an uplink that is in MRI mode, for maximum fun created with PIM Hello (or statically set in CLI) :) This example uses the following software and hardware components: One EX4300 Series switch Junos OS Release 13. 0 If there is a mismatch in the IGMP version, then perform the following changes: IGMP snooping is enabled on the default vlan on all 3 switches. gjijb vazdmr baze haer vhjt elyf rcqs qezc qnqxse zxeuz iywch ldus vxwsan onc xodlqu