No really. Are you sure the links between the switche May 29, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. Aug 31, 2021 · I found my mistake: The devil WAS in the what I called : "it's just a "stupid" switch with not port security or anything configured on it. Wait about 10 minutes after that and they fail. Pretty insignificant IMO. Oct 26, 2021 · The system also has SNOM M900 DECT IP cells to cover the headquarters offices. Virtual IP is 192. TTLs are adjust for routing, using a routable multicast address, attempted to use IGMP keep-alives on the receiving devices but the 425s Oct 22, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. So, I just did that and it seems to work. View community ranking In the Top 1% of largest communities on Reddit Video Distribution / Multicast Support . Feb 8, 2024 · Finally, one other type of network-level transmission that can cause issues in 802. 5. Meraki support swears my configs look good and are literally throwing (it) at the wall hoping something will stick. I do not have multicast routing enabled on the vlans. 3. After extensive troubleshooting, we noticed that the problem resides on the Meraki MR30H. I spent almost 3 hours on the phone with the phone vendor. Dec 6, 2022 · Basically, you can't watch TV for over 6 minutes without interruptions that will last seconds to minutes. Just make sure that either "IGMP snooping" or "Flood unknown multicast" is enabled under "switch > switch settings" on the dashboard (Ideally, I would go with IGMP snooping). As seen on Nov 30, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. Once traffic is flowing, ACL it out and should be done. Under multicast support, selection Enable IGMP snooping querier. With that enabled, (this is theory) I believe the cpu was being overwhelmed and causing spanning tree and other packets to drop. 1 x MX --> 3 x MS --> 5 x MR -> 5 IPTV STB Each MR AP has an IPTV STB connected. x firmware, my endpoint devices do not receive the multicast traffic. If I connect a cell on HP or Aruba switches all is working fine. Now they are just stuck in Master / Master very strange. Apr 8, 2020 · I have my AT&T gateway router (Arris/Motorola BGW210) connected to the switch on a port auto-negotiated to 1Gig set for Access mode on VLAN 192. Redundant field replaceable PSU's in the box, both copper and SFP WAN ports, all good. Under multicast support, select Enable multicast routing. 0. In that default configuration : "Flood unknown multicast traffic" is not enabled". If flood-unknown is disabled, then the packet would only Apr 12, 2018 · Tested today and the paging to the voip phones worked but we have some Valcom speakers that did not work. May 7, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. 1. 4. Im thinking it might be the MAC address VRRP bug thing, but I have not Apr 8, 2020 · I have my AT&T gateway router (Arris/Motorola BGW210) connected to the switch on a port auto-negotiated to 1Gig set for Access mode on VLAN 192. Happy network. Both switches occassionally see the physical address but with the virtual MAC which should never occur. Let me know if this helps. As seen on May 30, 2018 · I had "IGMP snooping" and "Flood unknown multicast traffic" set to enabled. Select or Add an interface. You can use the unknown unicast flood blocking (UUFB), unknown multicast flood blocking (UMFB), and unknown unicast flood rate-limiting (UUFRL) features to prevent or limit this traffic. 1 day ago · ms120/125s may fail to forward link-local multicast [224. Nov 29, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. 1). networks_switch_routing_multicast module – Resource module for networks _switch _routing _multicast Note This module is part of the cisco. If flood-unknown is disabled, then the packet would only Aug 23, 2022 · On the core, set "Multicast Routing" on vlan 10 and vlan 100 to "Enabled Multicast Routing" Set a rendezvous point on the core enable "IGMP snooping" and disable "Flood unknown multicast traffic" on the 425 stack at the core and the 350 stack at the remote site - IGMP snooping / Flood unknown multicast traffic "enable" Everythings works fine except for the deployment of Windows client with SCCM Server (F12) on all my VLAN. Just wanted to make sure there was nothing else I needed to do. Unlike wired networks, wireless networks typically send multicast traffic flows over the wireless medium as broadcast traffic. This is to discover and form adjacencies with PIM Neighbors. 13. In the end, we ended up disabling IGMP snooping and Flood unknown multicast traffic under Switch -> Switch Settings -> Multicast Settings. " Used an MS for that, default configured. Unicast traffic flows but NO multicast. Basically, switches have two decisions to make regarding multicast traffic, either flood it like unknown unicast/broadcast or try to keep track of which hosts subscribe to a specific multicast group address and only forward traffic sent to that group address to those host ports. Sep 21, 2023 · We created an IGMP Querier on the switch closest to the multicast source, and we can see the multicast traffic on switch 1 and 2, but not switch 3 or 4. The laptop's pcap file is 1. The more clients you have the more 61111 traffic you'll see. These were enabled by default, with no way to adjust Aug 27, 2022 · On the core, set "Multicast Routing" on vlan 10 and vlan 100 to "Enabled Multicast Routing" Set a rendezvous point on the core enable "IGMP snooping" and disable "Flood unknown multicast traffic" on the 425 stack at the core and the 350 stack at the remote site In both cases this requires setting up an IGMP querier, which Meraki calls an "interface", on the switch where the DSP is connected (switch 2). Nov 16, 2018 · A switch treats a received multicast packet as unknown when the destination group is one for which the switch has not observed an explicit group join (signaled via an IGMP report packet). A firmware upgrade was important since Meraki added Multicast Queuing. The phones were reset to factory settings Sep 24, 2018 · So in essence it seems that the multicast is working. 18. Unless you have a reason, you should be using sparse mode to build your connections back to the RP address. We haven't tested it yet but plan to in the next day or two. 2. Some client are in the same VLAN than the SCCM server DP, some not so my Paloalto'FW (connected to the core) is making ip helper relay for all VLANs. Port Isolation - Enabled 2. 03-14-202209:21 AM. Under "Multicast settings" in "Switch Settings", IGMP Snooping is turned on, as is "flood unknown multicast traffic". Navigate to Switch > Configure > Routing and DHCP. Mar 14, 2022 · Multicast Flood - Explanation. Opened several tickets with Meraki and they are completely clueless how to help. Basically, depending on who comes first, whichever MX will not be able to reply on multicast streams. Sep 7, 2016 · On most Cisco Catalyst switches with IGMP snooping enabled: When it sees multicast traffic for a destination that it has not seen any IGMP reports for it will flood that traffic out all ports in the vlan (normal switch behavor for unknown destination mac address). Apr 9, 2018 · We have a PIM-SM network set up for informacast. By default, unknown unicast and multicast traffic is flooded to all Layer 2 ports in a VLAN. When we connect the TV Directly to the MS390 all the channels perform as expected. Flooding unknown multicast packets was the issue. Dec 5, 2022 · Flood unknown multicast traffic: try Enable / Disable and see if helps. 168. I think something is dropping some packets. Hi Great question, when I moved VLAN 120 to the Meraki side I disabled Multicast Routing on my integration vlan 1201. The phones were reset to factory settings several times. Hi all, I posted this in case someone has similar issue. Stack ports have an orange LED instead of green (present Oct 23, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. 11 networks is multicast traffic. Aug 23, 2022 · On the core, set "Multicast Routing" on vlan 10 and vlan 100 to "Enabled Multicast Routing" Set a rendezvous point on the core enable "IGMP snooping" and disable "Flood unknown multicast traffic" on the 425 stack at the core and the 350 stack at the remote site Sep 22, 2023 · We created an IGMP Querier on the switch closest to the multicast source, and we can see the multicast traffic on switch 1 and 2, but not switch 3 or 4. But it is more of an art than a formula since different Switches (MS390 vs MS125) ended up with different settings. Thanks! Aug 11, 2022 · Flood unknown multicast traffic: try Enable / Disable and see if helps. It was working fine, until it just stopped. Sparse is being used. I feel kind of stupid with this oversight. What's not to like. I investigated this and discovered that by putting the command "no ip igmp Nov 20, 2020 · I've always been a huge supporter of Meraki, but I haven't been able to get a DM NVX system working reliably. Oct 10, 2022 · Our firewall suddenly started seeing a bunch of IPv6 router solicitation requests and that set off some alarms (we shouldn't see any IPv6 traffic). meraki. Nov 30, 2022 · I tried several IP addresses (all in the multicast range). Nothing I tried would make it work again. Nov 27, 2018 · A switch treats a received multicast packet as unknown when the destination group is one for which the switch has not observed an explicit group join (signaled via an IGMP report packet). Reply. Nov 30, 2022 · The phones are wired in, so the AP is not in play. Link Negotiation - 1 GB Fixed to the MR30H 3. For example, when I do a capture on the test laptop and on the switch port. Should be very simple, alas doesn't work . Feb 27, 2020 · Two (non Cisco) routers not receiving multicast packets from each other. doing packet captures I can see the multicast traffic go into the uplink interface of the meraki switch but it never reaches the client port the device is connected to. And as you mention limiting broadcast domain size is part of core networking fundamentals. Setup VLAN2 and VLAN3 on the core with interfaces, set an RP, and it should work. Rinse and repeat as many times as you want. Oct 17, 2023 · The traffic is proportional to the amount of clients on the APs. I have IGMP snooping turned on and flood control on, however once I patch in a decoder and the multicast traffic starts hitting my network it takes it completely down (not just in it's VLAN, but it ramps the CPU of my MX up to 100% and packet loss hits 100%). meraki collection (version 2. As IGMP snooping is available on MS Switches, each MR AP only gets the specific IPTV multicast stream, that the STB has requested. All of the audio equipment is on its own VLAN, and it doesn’t require any network out functions. In this test scenario, the IPTV provider has 3 channels - Channel 1 (8 Mbps), Channel 2 (8 Mbps) and Channel 3 (4 Mbps). IGMP rendezvous point is configured for 221 VLAN. 1. Oct 5, 2020 · Step 1: Once Multicast Routing has been enabled on an SVI, PIM Hellos will be sent to the multicast address of 224. Nov 15, 2023 · A switch treats a received multicast packet as unknown when the destination group is one for which the switch has not observed an explicit group join (signaled via an IGMP report packet). Aug 16, 2018 · We created an IGMP Querier on the switch closest to the multicast source, and we can see the multicast traffic on switch 1 and 2, but not switch 3 or 4. I tried several IP addresses (all in the multicast range). From a pcap they look to be 66 bytes in size. Aug 1, 2023 · Hello, @NJacobe If you have both the multicast source and the clients in the same VLAN, you do not need multicast routing. 20 from the 9. May 5, 2020 · Are you able to say what those issues are? Seems simple enough. IGMP snooping & Flood unknown multicast traffic are both enabled. All looks ok on a host sat on the LAN. ago. Two (non Cisco) routers not receiving multicast packets from each other. Sep 22, 2023 · We created an IGMP Querier on the switch closest to the multicast source, and we can see the multicast traffic on switch 1 and 2, but not switch 3 or 4. 2MB and the Switchports is 4. Arp issue when turning off flood unknown multicast traffic - MS425 core switch. This was the RP vlan, I never changed it over to VLAN 120. There definitely isn't enough (or any?) protections in place on the current MS firmware to ensure the switches can survive during high loads of multicast traffic (or any CPU heavy task). Oct 22, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. Aug 23, 2022 · On the core, set "Multicast Routing" on vlan 10 and vlan 100 to "Enabled Multicast Routing" Set a rendezvous point on the core enable "IGMP snooping" and disable "Flood unknown multicast traffic" on the 425 stack at the core and the 350 stack at the remote site Aug 4, 2023 · The options for IGMP snooping and flood unknown multicast traffic are already on. Nov 30, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. After playing with the settings, and disabling "IGMP snooping" on both of my Meraki switches, the UPNP traffic started reaching the rest of my network. Nov 24, 2020 · Never flood multicast - even if you have only a few NVX encoders on your network and you flood multicast traffic your network will meltdown. So of course VRRP is having a se Jan 25, 2019 · If this is disabled, then we cannot recieve multicast streams stemming from ports where we send out multicast streams. Aug 11, 2022 · Flood unknown multicast traffic: try Enable / Disable and see if helps. Then I move the laptop to an access vlan 63 for example for PIM to kick in, same issue seems to work a bit then starts going bad. The amount of traffic produced by a few of these encoders will easily overwhelm a 1Gbps port if not controlled with IGMP. 120. Until i configured them for HA in VPN concentrator mode. I do have an application on one of our networks that relies on Feb 13, 2023 · I tried several IP addresses (all in the multicast range). Hi Guys, Sep 24, 2018 · So in essence it seems that the multicast is working. I tend to have a good handle on Dante on my Meraki networks, and have found that they work better if the Flood Unknown Multicast option is disabled on the Meraki switches. Once saved, navigate back to Switch > Configure > Routing and DHCP. Click Save. Nov 30, 2020 · I'm not sure why the spec sheet would have that, we have stacks of MS225s and they definitely have two 40Gb stacking ports. The set top boxes are connected at 100Meg to access ports on VLAN 192. I have enabled the global IGMP snooping setting and disabled Flood Unknown Multicast traffic. After upgrading to 10. On a Cisco 6807 with IGMP snooping enabled: I had "IGMP snooping" and "Flood unknown multicast traffic" set to enabled. To fix this go to Switch > Configure > Switch Settings scroll down till you see the multicast settings and disable "Flood Unknown multicast traffic". Thanks! . Flood unknown multicast traffic; will allow the switches to flood multicast traffic out all ports. Flood unknown multicast traffic: try E Help Configuring MS125, Dante and Bose Audio System, and Multicast Audio over IP. Information About Unknown Traffic Flood Control. We do not have multicast routing enabled for the VLAN, just the IGMP Querier. Feb 13, 2023 · IGMP snooping is enabled on all switches and flood unknown multicast traffic is disabled. Apr 12, 2018 · I also confirmed that multicast traffic is handled by the CPU in MS devices which is certainly unfortunate. IGMP enabled on 210 and 221 VLAN. We are currently installing Tripleplay on an MS250 / MS425 setup and are also having issues with quality. I don't have a lot of experience with multicast, but my understanding is that you only need multicast routing if you are routing multicast traffic between two or more networks. Select the interfaces that require multicast routing. Also IGMP snooping on core switch disabled and flood unknown multicast traffic enabled IGMP snooping enabled and flood unknown multicast disabled on access switches Again, if no MR30H is used but straight from TV to access switch there is no problem at all. The options for IGMP snooping and flood unknown multicast traffic are already on. Sep 21, 2018 · >Then I have a test laptop on vlan 1201 also on the Meraki side, streams seems ok for a little bit and then starts going bad. 1MB. In rare circumstances MS130s may experience management plane congestion that results in UDLD alerts and STP transitions; Ms210 known issues. cisco. All the switches have IGMP snooping enabled, and Unknown Multicast Flood turned off. With the combo of it being a trunk port and that being on, I could see it going across all VLANs. If flood-unknown is enabled, such packets will get forwarded out all ports (except the ingress port). We are pushing 8 hi-def videos on our network. Note: Adding a new L3 interface on an MS390 automatically enables an IGMP querier for that VLAN. May 6, 2020 · Is this being routed across VLANs, or IGMP within a VLAN? Oct 27, 2021 · It seems that the settings "IGMP snooping" and "Flood unknown multicast traffic" set to "Enable" do the job! Sep 21, 2023 · We created an IGMP Querier on the switch closest to the multicast source, and we can see the multicast traffic on switch 1 and 2, but not switch 3 or 4. If I connect the same cell on MS220 or MS120 Meraki switches, cell is currently available, reachable by its IP address, seems it works fine for all except it's unable to find other cells and start muli Dec 6, 2022 · Hi Guys, here is what ended up practically solving the issue for us. Enter Name, Interface IP , and VLAN. These were enabled by default, with no way to adjust Apr 7, 2022 · Flood unknown multicast traffic: try Enable / Disable and see if helps. Flood unknown multicast traffic is enabled, I have tried with various on off settings and for Snooping as well. x] traffic when 'Flood unknown multicast traffic' is disabled; Ms130 known issues. In order to alleviate this potential issue, Meraki access points enable IGMP by default. You can find the current PIM Neighbors by selecting the switch in question under Switch > Monitor > Switches and running Multicast Routing under the Tools tab. Hi all, has a weird situation in one of my installations configured for multicast where when a computer would shutdown or reboot the switches would flood all the ports with multicast traffic and then stop after a while. Few months ago, we started to see a lot of CRC errors on our switches. Hello, we have a site that has an MX84 and 2 MS125-48FPs, and we are having issues getting the Dante Audio system setup working correctly. I rebooted everything. Oct 7, 2021 · Oct 7 2021 10:52 AM. Aug 31, 2021 · Just got my first set of MX105's nice 🙂. Should be very simple, alas doesn't work Both switches occassionally see the physical address but with the virtual MAC which should never occur. Hi. As seen on Ubuntu host correctly It was working fine, until it just stopped. Per Meraki tech support, we turned off Flood unknown multicast traffic in switch settings. Mar 26, 2024 · To configure an IGMP querier: Navigate to Switch > Configure > Routing and DHCP. The problem is with the AP and the amount of multicast data it can ingest and process. I thought the speakers may need multicast routing enabled so I enabled it on only the vlan the horns are in (horns and synapps server are in same vlan) and things all across the network started - IGMP snooping / Flood unknown multicast traffic "enable" Everythings works fine except for the deployment of Windows client with SCCM Server (F12) on all my VLAN. 19 and 10. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. If everything is on a single LAN you just need IGMP Snooping and and IGMP Querier. Dec 2, 2022 · I tried several IP addresses (all in the multicast range). Feb 22, 2018 · I also confirmed that multicast traffic is handled by the CPU in MS devices which is certainly unfortunate. keef2506 • 1 yr. rx lp eh rr cj tk ud rd fj zz