Multicast Traffic - IGMP Snooping

We are currently running a Hybrid CATOS/IOS Environment with Sup2 and MSFC2 Line Cards. The Sup Version is
8.4(3) and MSFC is 12.1(26)we want to run multicast traffic between our internal network to our external Govt Provider in the form of a particular Video Conferencing Client. We have been told that seeing we are running CATOS on our Sup2 engines we will get periodic dropouts of multicast traffic between our internal and external Depts if we don't upgrade to an Native IOS Environment. They are saying that we cannot disable igmp snooping on a per-Vlan basis under our Current Hybrid Environment unless we upgrade to Native IOS. Can we disable igmp snooping on a per-vlan basis using our current CATOS version or do we have to upgrade to a Native IOS Software set ??
Thanks Simon

at the catOS level, you only have the ability to enable igmp, not per vlan.
on the msfc SVIs you should then be able to enable or disable igmp at the VLAN interface level.
this may provide the abilities you are looking for.
try this and let us know if any further issues or post your config for review.

Similar Messages

  • Multicast trafficis being flooded on igmp snooping enabled switch

    I have two devices connected to the same switch, S streams video using multicast, H doesn't send join request, but the multicast is being sent to H, actually it is being flooded. Both hosts are in the same vlan.
    Distribution-1#show ver | in WS
    cisco WS-C2960-24TT-L (PowerPC405) processor (revision E0) with 65536K bytes of memory.
    Model number                    : WS-C2960-24TT-L
    *    1 26    WS-C2960-24TT-L    15.0(1)SE2            C2960-LANBASEK9-M

    Duplicate post.
    Go here:  https://supportforums.cisco.com/discussion/12218811/multicast-trafficis-being-flooded-igmp-snooping-enabled-switch

  • Layer 2 multicast using IGMP V2 snooping

    Hi Forum,
    I hope you are doing great, the reason why I’m writing is to ask your assistance in regards with a question that I have.
    We are working with some video surveillance equipment(Endura from Pelco), this equipment are all ip multicast for layer 2 networks, we know that a lot of your switches are compatible with IGMPV2 snooping, I want to design the best network possible for things to run smoothly I was wondering if you could help me decide the best type of switches for core(query) and edge (queries), I need switches that can hold around 250 multicast sessions at a time, also if you can direct me to layer 2 IGMPV2 snooping information and configuration manual I would really appreciate it.
    Another thing that I want to ask  is to know if I can use an only layer 2 solution with the core and edge switches being Layer 2 or if it would be better to have the core switch as a layer 3 which would be a hybrid solution.
    We are thinking of using a 3750 layer 2 as core and 2960 layer 2 as edge
    I hope you have the time to answer my questions.
    Have a great day
    Bruno Martinez
    Excel

    Brian
    Yes you need the IGMP snooping querier function if you have no L3 interfaces configured with PIM.  IGMP snooping on a switch listens to the IGMP queries and responses to those queries. If you have a L3 interface(s) running PIM then they will send the IGMP queries. But if you don't then nothing will make the queries so IGMP snooping has nothing to listen to.
    So, if the switch supports it, you can use the IGMP snooping querier which makes IGMP queries. See this link for how to configure it -
    http://www.cisco.com/en/US/docs/switches/lan/catalyst2960/software/release/12.2_55_se/configuration/guide/swigmp.html#wp1193337
    You should enable it on one of your 2960 switches.
    As for the ESW520, i'm sorry but i don't know is the short answer. That is a small buisness switch and they have their own forums so perhaps you could post that question in those.
    Jon

  • Multicast mac address isn't learned, igmp-snooping

    I have PIM router which connects to the cat 2960 switch and also I have host which connects to another port on the same switch. Host was joined to the IGMP group 224.1.1.1. I see that the router generates igmp-query and the host respons. IGMP-snooping process sees that process and updates appropriate entries:
    2960-5#sh ip igmp snooping mrouter
    Vlan    ports
      15    Gi2/0/32(dynamic)
    2960-5#sh ip igmp snooping groups
    15        224.1.1.1                igmp        v2          Gi2/0/32, Gi2/0/33
    But when I command "sh mac address-table multicast" I see nothing:
    2960#sh mac address-table multicast
    Vlan    Mac Address       Type        Ports
    What is reason of this problem?

    There is the following statement from the "CCNP Practical Studies: Switching:
    the process of populating the bridge table with multicast MAC addresses is based upon inspection of the destination MAC address, unlike unicast MAC addresses where the source MAC address of unicast frames is examined to generate bridge table entries.
    And this book describes other parts of the mac learning process and says that after exchanging IGMP-message MAC-table must be populated by multicast mac-addresses. But later I found some Cisco and Jupiner documentation which says there is two way to perform multicast forwarding - MAC and IP. Default metod is IP multicast forwarding. When this metod is used multicast MAC-addresses isn't learnt and process of packet forwarding uses special forwarding cache which includes list of mapping IP and appropriate interfaces. It all means that this book isn't actual. All modern switchs perform multicast forwarding by IP metod and MAC-addresses don't populate CAM. 

  • IGMP Snooping configuration for Multicasting on Cisco Catalyst 3020

    IGMP Snooping configuration for Multicasting on Cisco Catalyst 3020
    Hi Guru,
    Our switch model is "Cisco Catalyst Blade Switch 3020 for HP"
    We are building HA (High Availability) Databases infrastructure.
    Currently, there are two nodes(hosts- servers) and two above switch for HA.
    Oracle said we need to turn off the IGMP Snooping in order to use the multicasting for their interconnect communication.
    So my question is:
    Q1> Is there any way to use Multicasting without turning off IGMP Snooping on Switch side?
    Q2> If 'yes', how can we configure the switch for Multicasting ?
    Oracle uses 230.0.1.0 & 224.0.0.251 IPs with 42000 range port for Multicasting communication.
    Please shed some light on it

    May I request if you avoid making multiple posts of the same issue?  This will only confuse people (including you). 

  • Multicasting (IGMP Snoop) between Nortel and Cisco

    We are currently having issues with Zen imaging (multicasting) and our setup is the following.
    Please take into account, our knowledge is very limited with IGMP Snooping setup etc.
    MDF = 6 Nortel 450-24T's using FirmWare -1.48 / SoftWare - 4.5.2.4
    IGMP Settings are such :
    VLAN: [ 1 ]
    Snooping: [ Enabled ]
    Proxy: [ Disabled ] -----> This was on...but once off, runs much smoother.
    Robust Value: [ 2 ]
    Query Time: [ 125 seconds ]
    Set Router Ports: [ Version 1 ]
    In the MDF (anythig directly in those switches) images fine now. (once I disabled PROXY)
    However I have a few IDF's off the MDF that are using OLD Nortel 350F-HD's (no IGMP Snooping support) and it's horrible (can only do a few computers at a time.
    So in one of the IDF's (the biggest one) I pulled out the 350F-HD and replaced it with a CISCO 2950 w/Fiber and it's using 12.1.20EA1 and I left IGMP Snooping on (thinking this will fix it) and couldn't even get ONE machine to connect and image in the multicast session. It's settings were (by default):
    Global IGMP Snooping configuration:
    IGMP snooping : Disabled
    IGMPv3 snooping (minimal) : Enabled
    Report suppression : Enabled
    TCN solicit query : Disabled
    TCN flood query count : 2
    Vlan 1:
    IGMP snooping : Disabled
    Immediate leave : Disabled
    Multicast router learning mode : pim-dvmrp
    Source only learning age timer : 10
    I then completly disabled IGMP Snooping on the CISCO and we're able to Image 5-7 Computers without a crash (more than that and it crashes - disconnects etc)
    In the area's that I have All 450's or all CIsco's the imaging seems to go fine. (with minor errors)
    Can any one give me some advice (or hopefully ran into this mixed setup before)?
    Thank you.

    Bosalaza,
    Thank you for replying (and I read even more on the ip multicast routing). However I've not ran into the same issue at any school that has 100% cisco switches or 100% Nortels (that are setup correctly and not older than dirt). I think we've not needed the multicast routing setup as we only have one router on the network (and it's flat at the moment anyway). As long as IGMP Snooping is enabled correctly (on the switches) it seems to serve us well.
    Although from what I've read (where you pointed me too) it seems even in our setup we would benifeit from taking time to setup "ip pim ....." etc.
    I was able to scrounge from another network and change out a few very old Nortels (that didn't support IGMP Snoop) and all seems well now.
    So long story short (and incase anyone else needs this info. The Nortel 350T and F - HD's were the main issue. It seems (for now) that a mixture of Nortel 350/450-24T's (any model that at least has IGMP Snooping) and Cisco's mixed (also Snoop on) works pretty well.
    I'm going to consider this solved as I was able to fix it with changing out some old product. However I really appreciate your efforts and pointing my towards some good info. (Which I'm going to read up on more, as I'm sure we'll need to get it setup in the near future.)
    Thanks again.

  • Multicast traffic flooding

    Hi
    We are using Network Load Balancing on some Windows 2003 servers which is configured as IGMP multicast.
    The servers are connected to a 3550 SMI switch which is connected to a HP4108.
    Before I configured either of these switches I connected a packet sniffer and saw the multicast traffic appearing on all ports on both switches.
    I configured the HP switch as a Multicast querier and now on the 3550 I see the multicast mac addresses logged against the server ports. The 3550 also detects the muticast router as you can see:
    prod-3550#sh mac-address-table mult
    Vlan Mac Address Type Ports
    1 0100.5e7f.4601 IGMP Fa0/10, Fa0/12, Gi0/1
    1 0100.5e7f.4602 IGMP Fa0/9, Fa0/11, Gi0/1
    prod-3550#
    prod-3550#sh ip igmp snoo mrouter
    Vlan ports
    1 Gi0/1(dynamic)
    The 3550 is still spamming the multicast traffic to all ports whereas the HP switch is only replicating thisto ports that are part of the multicast group.
    Can anyone tell me why the 3550 is doing this or what else I need to check?
    Thanks in advance.

    Kate
    You do not tell us much about how the 3550 is configured. From your description of the problem I am going to assume that you do not have IGMP snooping configured. This link will show you how to configure IGMP on the 3550:
    http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225sec/3550scg/swigmp.htm
    If my assumption is not correct and you do have IGMP snooping configured, then you will need to tell us more about how the 3550 is configured so we can determine why it is propagating multicast to all ports.
    HTH
    Rick

  • IGMP snooping

    Hello to all!
    I have come a cross one problem with hope someone can help me solve it or at least give some valuable ideas.
    The problem is regarding IGMP snooping with Cisco 4948E swithes. By documentation it is said that IGMP snooping is turned on by default.
    However, I was getting all multicast traffic on the port where there is only one receiver, tuned to only one multicast group.
    I was able to solve to problem by turning igmp snooping querier option and now it is working ok.
    However, I have to plug in a Cisco router (7200 series). In that case the router is the querier.
    My problem is that the router is constantly getting all multicast traffic, causing the CPU time to increase and be crushed.
    I have several multicast groups on the switch, but want only specific ones to be present on the port where router is connected.
    I think IGMP snooping is not working on 4948E switches.
    Did anybody else experience the same problem?
    The router has PIM enabled and I have managed to solve the problem with access list being put in outside direction but this is not the neat solution.
    How can I solve this problem? When I do show int command on the router I am getting all multicast traffic and I want to receive only specific ones with way too lower traffic amount.
    Thank you very much!

    Hello to all!
    I have come a cross one problem with hope someone can help me solve it or at least give some valuable ideas.
    The problem is regarding IGMP snooping with Cisco 4948E swithes. By documentation it is said that IGMP snooping is turned on by default.
    However, I was getting all multicast traffic on the port where there is only one receiver, tuned to only one multicast group.
    I was able to solve to problem by turning igmp snooping querier option and now it is working ok.
    However, I have to plug in a Cisco router (7200 series). In that case the router is the querier.
    My problem is that the router is constantly getting all multicast traffic, causing the CPU time to increase and be crushed.
    I have several multicast groups on the switch, but want only specific ones to be present on the port where router is connected.
    I think IGMP snooping is not working on 4948E switches.
    Did anybody else experience the same problem?
    The router has PIM enabled and I have managed to solve the problem with access list being put in outside direction but this is not the neat solution.
    How can I solve this problem? When I do show int command on the router I am getting all multicast traffic and I want to receive only specific ones with way too lower traffic amount.
    Thank you very much!

  • Bridge Domain and multicast traffic

    Hi All,
    i am planning to build a Point to multipoint network based on ME3600X switch at the HQ and ISR 2900 routers at the Branches. i need to simulate a lan service.
    i though of using EOMPLS at the ISR 2900 and closing them at the ME3600X. at the ME3600X i will use bridge domain to have this point to multipoint functionality.
    at the configuration guide i saw that when i am using bridge domain i need to disable IGMP snooping on every Vlan.
    my question is how the bridge domain treat Multicast traffic ?
    furthermore, can i mix EOMPLS and Bridge Domain ?
    Thanks,
    Avi.

    Hi Avi,
    ME3600X doesn't support VPLS yet (check with your account team for the roadmap) so I don't think your design will work here. What you can do is having a router behind the ME3600X which will have a dedicated VLAN with each remote site.
    HTH
    Laurent.

  • Catalyst 2955T-12 Power Supply n IGMP Snooping

    Hello everyone,
    I have Two Catalyst 2955T-12 switches, on this switch there are Two Power Supply (DC) options...I want to implement redundant Power Supply solution, can this Two DC Input on Switch will give this solution or I have also external Din Rail power supply...my question is how I can implement redundant power supply so that if one PS of switch fails then automatically other will start?
    Also can any body tell me what IGMP snooping do? do I need to configure it? also the command (I need global command as well as port/interface based command)?
    Regards,
    Shahid

    For the power redundancy question, I believe this link will help:
    http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12122ea2/2955hig/hginstal.htm
    Also can any body tell me what IGMP snooping do? do I need to configure it? also the command (I need global command as well as port/interface based command)?
    >>Layer 2 switches can use IGMP snooping to constrain the flooding of multicast traffic by dynamically configuring Layer 2 interfaces so that multicast traffic is forwarded to only those interfaces associated with IP multicast devices. As the name implies, IGMP snooping requires the LAN switch to snoop on the IGMP transmissions between the host and the router and to keep track of multicast groups and member ports. When the switch receives an IGMP report from a host for a particular multicast group, the switch adds the host port number to the forwarding table entry; when it receives an IGMP Leave Group message from a host, it removes the host port from the table entry. It also periodically deletes entries if it does not receive IGMP membership reports from the multicast clients.
    The multicast router sends out periodic IGMP general queries to all VLANs. When IGMP snooping is enabled, the switch responds to the router queries with only one join request per MAC multicast group, and the switch creates one entry per VLAN in the Layer 2 forwarding table for each MAC group from which it receives an IGMP join request. All hosts interested in this multicast traffic send join requests and are added to the forwarding table entry.
    IGMP Snooping is by default Enabled globally and per VLAN. If for some reason it is not enabled, "ip igmp snooping" at the config mode to enable it.
    There is nothing else to configure.
    http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12122ea5/2950scg/swigmp.htm#wp1020034
    Please rate helpful posts.

  • IGMP Snooping on the GE_XP card

    We have a ring of M6 chassis, equipped with GE_XP cards creating an Ethernet ring.
    We are running a ton of multicast across the  network, and have decided to have the GE_XP (xponder cards) do IGMP snooping to reduce the amount of m-cast traffic flooding the network.
    When we turn IGMP on (per SVLAN as needed), we do not see the pruning of multicast traffic we would expect.  We would expect that any of the 1G UNI's, that do not have multi-cast receivers, would be pruned (shielded from the large stream of multi-cast traffic). But we see the UNI ports still passing all the Multicast traffic down to the edge switches on all ports.
    We have MAC learning disabled on these GE_XP cards.  Do I need MAC learning enabled in order to do IGMP snooping?  Are there any other settings that might affect/stop the GE_XP cards from pruning multi-cast traffic?

    Duplicate posts.  :P
    Go here:  http://supportforums.cisco.com/discussion/12147011/igmp-snooping-gexp-card

  • IGMP‌ Snooping Querying on SGE-20x0P

    I want to enbale IGMP‌ Snooping Querying on SGE-20x0P switches. IGMP‌ Snooping is enable on the VLAN but I need IGMP Querying that Multicast traffic only forwarded to port that request udp from IPTV core switch not all ports that assign to IPTV‌ VLAN. How can I do this?

    Thanks for your reply Tom, my issue in IPTV network is when port 1 in switch A and port 2 in switch B want to see channel 1 of TV the udp traffic broadcast to all port of that switches on the IPTV‌ vlan, we need to forward traffic to port 1 of switch A and port 2 of switch B only and when the users change the channel the udp of channel only forward to that ports, we have 50 channel that start from 229.0.0.1 to 229.0.0.51 and all of SGE 20x0P switches trunk to 3750
    sorry for my bad english

  • Ip igmp snooping querier on Nexus, what source IP address to use?

    Am looking at a problem with servers in the same vlan across multiple switches that are unable to communicate using multicast. I have found that in the systen I'm to set up I need to apply the ip igmp snooping querier command, in the vlan, but it needs a source IP address.
    Different documents make conflicting recommendations for this address, one suggests that any unused address will do, another suggests to use the IP address that is configured on the SVI for the vlan.
    Which is correct?

    Eventually I had to ask Cisco TAC, the response was that any IP address within the subnet could be used. The recommendation was to allocate an unused address in the vlan subnet for this purpose, use the same address on multiple switches should resiliance be required.

  • IGMP Snooping IPTV SG200-08

    For having 3 settopboxes for iptv I have setup vlan 3 for iptv.
    IGMP snooping is enabled for vlan 3 with the default settings and port 5 (incoming iptv) is enabled as IGMP Mrouter.
    In the multicast forwarding table vlan 3 is set to filter unregistered.
    This is working fine for a while but after 2 to 3 days the settopbox doesn't receive the iptv signal anymore and I have to restart the switch.
    After the reset everything is working fine again for a few days and then the above repeats it self.
    How can I solve this problem?
    Sent from Cisco Technical Support iPad App

    Hi Alexandre, I think the only way to see what is happening is by generating a packet capture to see why when one of the connections leave, what is being sent or received by the other to cause the delay.
    -Tom
    Please mark answered for helpful posts

  • Ip igmp snooping querier?

    i've been reading these forums and noticed that lot of people have problems with configuring multicast. basicly, problems are flooding bandwidth, no querier, confusing pim router configuration ...
    also, ive seen some promisses from tehnical stuff that next gen of linksys switches will have #ip igmp snooping querier, like cat ones have. so i'm interested if someone can give me the answer.
    it is interesting question for many people who would cant afford expensive cat switches for such simple usage.
    regards,
    david

    Hi David,
    You actually have a lot more options as seen in the GUI, so I though I would put as simple network together and run you through a validation.
    But I am assuming you have the refreshed version of the SRW224G4P switch called the SRW224G4P-K9-NA .
    If you have the old switch the following is not relevant to you.
    I put together a simple network diagram showing my simple network topology used during my wee test;
    I chose the RV042 as my Layer 3 router  in this network.  
    It really was to provide DHCP services, but shortly after all devices had IP addresses, I removed the RV042,  becauise I noticed it was sending out IP IGMP general queries.     Something I didn;t want in the following test.
    I was using a software based multicast tester, produced by the wonderful folk at Twisted Pair Solutions.  This software can either send and/or receive multicasts of a defined group and responds appropriately to IGMP General queries. I will call this software MCT (Multicast test).
    I had the MCT software on PC C.  PC C is plugged into switch port 10  It is sending multicasts into the switch at a rate of about 10 multicast packets a second.
    I had the MCT software on PC A. PC A  is plugged into switch port  1.  It is set to receiving and count multicasts from the switch
    I had PC B plugged into switch port 2. PC B is  checking switch statistics, but not try to receive multicasts from PC 3.
    I had setup multicast snooping on VLAN 1 and querying according to the GUI screen capture below.
    Note: I only had a single vlan on this switch.
    In a composite of two screen captures below,  you can see that IGMP querier status is enabled.
    I took off the RV042 out of the network, because i noticed within a wireshark capture on PC A,   that the RV042 was sending out group general queries.  I wanted the switch to take over that role
    I waited a few minutes,  and displayed only igmp activity.
    It can be  clearly seen in the screen capture  below;
    SG300 series switch was sending out general queries (2 minutes) from source IP address 172.16.1.100.
    It waited for the mcast router general query, but when none came,  60 seconds later sent out it's own general query.  Fair enough, it had to assume a mcast router might be sending general queries every minute.
    Switch statistics can be seen below,  it showed;
    that PC B on switch port G2 was not being flooded by multicasts, in other words snooping is working;
    Port 10,  PC C is sending in 2962  multicast packets to the switch.
    Port 1,   PC A  is receiving 2900 multicast packets from the switch
    port 2 ,   PC B is not part of the multicast group 234.55.66.77 and as such is not being flooded by multicasts.
    ALL three PCs are windows based products,  and certain multicasts emanate from these devices.
    show interafce count
          Port       InUcastPkts  InMcastPkts  InBcastPkts    InOctets 
          gi1             12           9            6           3493    
          gi2            247          237           6          43733    
          gi3             0            0            0            0      
          gi4             0            0            0            0      
          gi5             0            0            0            0      
          gi6             0            0            0            0      
          gi7             0            0            0            0      
          gi8             0            0            0            0      
          gi9             0            0            0            0      
          gi10            26          2962          3          850881   
          gi11            0            0            0            0      
          gi12            0            0            0            0      
          gi13            0            0            0            0      
          gi14            0            0            0            0      
          gi15            0            0            0            0      
          gi16            0            0            0            0      
          gi17            0            0            0            0      
          gi18            0            0            0            0      
          gi19            0            0            0            0      
          gi20            0            0            0            0      
          gi21            0            0            0            0     
          gi22            0            0            0            0      
          gi23            0            0            0            0      
          gi24            0            0            0            0      
          gi25            0            0            0            0      
          gi26            0            0            0            0      
          gi27            0            0            0            0      
          gi28            0            0            0            0      
          Port       OutUcastPkts OutMcastPkts OutBcastPkts  OutOctets  
          gi1             13         2900          9          839691   
          gi2            233         343           9          90453    
          gi3             0            0            0            0      
          gi4             0            0            0            0      
          gi5             0            0            0            0      
          gi6             0            0            0            0      
          gi7             0            0            0            0      
          gi8             0            0            0            0      
          gi9             0            0            0            0      
          gi10            24          343           12         47165    
          gi11            0            0            0            0      
          gi12            0            0            0            0     
          gi13            0            0            0            0      
          gi14            0            0            0            0      
          gi15            0            0            0            0      
          gi16            0            0            0            0      
          gi17            0            0            0            0      
          gi18            0            0            0            0      
          gi19            0            0            0            0      
          gi20            0            0            0            0      
          gi21            0            0            0            0      
          gi22            0            0            0            0      
          gi23            0            0            0            0      
          gi24            0            0            0            0      
          gi25            0            0            0            0      
          gi26            0            0            0            0      
          gi27            0            0            0            0      
          gi28            0            0            0            0
    If I look at the multicast groups within the switch, it show that only two ports were involved in multicast group 234.55.66.77.  This is the correct behaviour.
    switch4cf17c#sh ip igmp snooping group
    Vlan   Group        Source        Include Ports        Exclude Ports     Comp.
           Address      Address                                              Mode 
    1    234.55.66.77 *            gi1,gi10                                  v2   
    1    239.255.255. *            gi1-2,gi10                                v2   
         250                                                                      
    Just to complete the posting, here is the CLI command (highlighted)  to enable the querier functionality within the switch;
    [Kswitch4cf17c#sh run
    bridge multicast filtering
    ip igmp snooping
    ip igmp snooping vlan 1
    ip igmp snooping vlan 1 querier
    interface vlan 1
    ip address 172.16.1.100 255.255.255.0
    exit
    interface vlan 1
    no ip address dhcp
    exit
    hostname switch4cf17c
    no passwords complexity enable
    no snmp-server server
    ip telnet server
    Hope this helps you and others
    regards Dave

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