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hzdrus
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IGMP Snooping

Wed May 16, 2012 12:32 pm

Are there any plans to add IGMP Snooping support to bridging, via OpenVPN in particular? IGMP Snooping is supported by Linux kernels since 2.6.34, is there a reason to keep it disabled?

Absence of IGMP Snooping breaks numerous scenarios where Mikrotik is used as a CPE or tunnel concentrator.
 
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janisk
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Re: IGMP Snooping

Wed May 16, 2012 12:36 pm

last news about IGMP snooping - it i will be considered as a possible additional feature for future releases of RouterOS. Nothing confirmed yet, that it will make it. However it has changed from - never ever :)
 
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Re: IGMP Snooping

Mon Jan 14, 2013 5:52 pm

Has anything changed since then?
 
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Re: IGMP Snooping

Fri Jan 18, 2013 1:37 pm

no, just that 6.0rc7 could be more stable regarding multicast as previous releases.
 
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Re: IGMP Snooping

Fri Jan 18, 2013 7:25 pm

That's good with multicast. I haven't had problems with it actually. Okay through wifi, but that was just a lucky try, didnt actually thought it would work :)

IGMP Snooping will be very cool when it will be supported
 
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Re: IGMP Snooping

Fri Jan 18, 2013 10:03 pm

Will there be any changes for the better, in terms of IGMP proxy?
 
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Re: IGMP Snooping

Fri Feb 14, 2014 3:59 pm

Hello guys,

any updates on IGMP-Snooping? I guess it's very simple to implement (one simple sysctl in underlying linux) and actually a "big feature" saving lots of $ for infrastructure switches that could be replaced/eliminated by (say) CCR.

Thanks very much!
-mk
 
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Re: IGMP Snooping

Sat Feb 15, 2014 1:11 pm

If there is any bug to vote on enabling IGMP Snooping, i'd vote on it. Cause it would be nice to avoid flooding multicast frames on all interfaces in vain.
 
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Re: IGMP Snooping

Sun Feb 23, 2014 7:35 pm

crs-125 do not have igmp snooping?!? when this functions activated? it's very important for many isp ....
 
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Re: IGMP Snooping

Wed Mar 19, 2014 3:23 pm

we definitely need igmp snooping, it is usefull on rb750,751,2011 and ccr ccs series ...
 
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Re: IGMP Snooping

Fri Apr 04, 2014 6:31 am

we definitely need igmp snooping, it is usefull on rb750,751,2011 and ccr ccs series ...
I'm join to it !!! Snooping & Proxy !!!

RB2011UAS-RM, CCR1016-12G
RB2011UAS-RM, CCR1016-12G
 
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Re: IGMP Snooping

Fri Apr 04, 2014 12:37 pm

+1 for IGMP snooping. If not on RouterOS then at least definitely on SwOS
(I can't imagine a managed switch that does not support igmp snooping and querier functionality)
 
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Re: IGMP Snooping

Fri Apr 11, 2014 2:46 pm

snooping is still not on the list. However on CRS routers you have multicast forwarding database table.
/interface ethernet switch multicast-fdb
 
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Re: IGMP Snooping

Fri Apr 11, 2014 3:45 pm

snooping is still not on the list
won't this work with current kernel?..
echo 1 > /sys/devices/virtual/net/bridge1/bridge/multicast_snooping
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Re: IGMP Snooping

Fri Apr 11, 2014 4:34 pm

from my experience from support e-mails and different threads on different forms regarding multicast snooping - snooping is evil.

Snooping is not defined by any RFC, it just is.
There is no promise of compatibility between actual PIM (PIM-SM, PIM-DM, IGMP-proxy as defined by their RFCs) nodes and snooper.
 
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Re: IGMP Snooping

Mon Apr 14, 2014 10:24 am

what about RFC 4541?

about compatibility: all features you named are working on layer3 (IP interfaces), and snooping is layer2 feature, it should work inside of a bridge interface, between its ports. so, compatibility is not needed - those areas are not intersected
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Re: IGMP Snooping

Mon Apr 14, 2014 11:39 am

the title starts with "Considerations for". It is not binding. as you can see rfc4605 is worded very differently.
 
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Re: IGMP Snooping

Mon Apr 14, 2014 12:12 pm

from my experience from support e-mails and different threads on different forms regarding multicast snooping - snooping is evil.

Snooping is not defined by any RFC, it just is.
There is no promise of compatibility between actual PIM (PIM-SM, PIM-DM, IGMP-proxy as defined by their RFCs) nodes and snooper.
If you're going to enter the access switches market (a really huge one I believe) you will have to implement IGMP snooping. By access switches I mean the L2+/L3 managed switches that ISPs are installing in the end-users' buildings all over their coverage area, and whose ports are directly connected to the CPEs. It's common for ISPs nowadays to provide IPTV over multicast service, which is not quite practical if access switches do not supports IGMP snooping.

PS. And while we're talking about the access switches, similar considerations apply to DHCP and NDP snooping as well.
 
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Re: IGMP Snooping

Mon Apr 14, 2014 4:34 pm

the title starts with "Considerations for". It is not binding. as you can see rfc4605 is worded very differently.
yes, there's no strict standards about IGMP Snooping, but can you show me some managed switch (except MikroTik's :)) which doesn't support it?

rfc4605 defines IGMP proxy, which is implemented already in RouterOS. it works completely on layer3, and it can't help in case of bridged configuration

IGMP Snooping works on layer2 (between bridge ports, not router IP interfaces) using info sniffed from layer3
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Re: IGMP Snooping

Wed Apr 16, 2014 1:26 pm

there is something already:
/interface ethernet switch multicast-fdb
it is not snooping as it is not dynamic. But at least it is controllable now.
 
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Re: IGMP Snooping

Sun Apr 20, 2014 7:35 pm

I don't understand that multicast-fdb. how is it used and for what we can use it?
 
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Re: IGMP Snooping

Tue Apr 22, 2014 4:34 pm

+1 for IGMP-snooping & udpxy.

It is General requirement for CPE for many ISP. Without this, we can not recommend these devices to our customers. And you do not get money from our customers for your very good device.
 
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Re: IGMP Snooping

Tue Apr 22, 2014 4:39 pm

Premoderated forum posts - a great evil. I'm disappointed.
 
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Re: IGMP Snooping

Wed Apr 23, 2014 2:38 pm

Premoderated forum posts - a great evil. I'm disappointed.
it's only for new users, because of spam
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Re: IGMP Snooping

Tue Apr 29, 2014 2:25 pm

A managed switch that doesn't support IGMP AND PIM snooping is worthless in most enterprise environments. Fine for home, bad for enterprise. Simply stating that IGMP snooping isn't a standard doesn't negate its popularity, widespread implementation, and overall usefulness. A manually programmable multicast FDB table is about as useful as a box of rocks outside of a core uplink to a multicast source tree.
 
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Re: IGMP Snooping

Tue Apr 29, 2014 5:06 pm

i see that mikrotik has new managed 24p switch series, but without igmp and dhcp snooping its not good... is it realy a problem to implement igmp snooping? is it a software problem or hw must support it?
 
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Re: IGMP Snooping

Wed Apr 30, 2014 1:26 am

is it a software problem or hw must support it?
hw supports it - they introduced multicast FDB table already. so now it's software part which is absent
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Re: IGMP Snooping

Sat May 03, 2014 8:59 pm

Without IGMP Snooping my rb2011uas-2HnD-in has become a poor router 2 ports, 1 wan, 1 lan that I had to add a cheap switch unmanaged that is not mikrotik.
It is assumed that this model is ideal for ftth but you really IGMP Snooping and IPTV is not usable if not fixed routing rules.
In my opinion, it is unfortunate. The Linux kernel provides this, I do not think it costs much routeros deploy.
I do not recommend changing the basic router that provide the IPTV providers for MikroTik.
 
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Re: IGMP Snooping

Thu May 08, 2014 1:01 pm

hardvk0, you've got the whole idea wrong. RB2011 series routers do not need to support IGMP snooping, by and large. And your "cheap switch unmanaged" does not support it either (nor any other unmanaged switch out there). What you're referring to is probably IGMP proxy, which is conceptually quite different from the IGMP snooping.
 
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Re: IGMP Snooping

Thu May 08, 2014 4:45 pm

Sorry if I'm wrong, and by the Lousy English translator of google.
I do not see how to prevent being flooded rb2011 ports, without filtering, blocking access to the igmp datagram.
Specifically, my solution is to put a tp-link TL-SG1016DE connected to a port without filtering IGMP.
The other ports do not have access to IPTV.
 
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Re: IGMP Snooping

Thu May 29, 2014 5:38 pm

Does anyone know how the Multicast FDB works? I don't understand if adding an entry blocks that multicast, or tells it to forward? It seems like multicast by default forwards to all ports since there is no IGMP snooping.

BTW, I too would like to have IGMP snooping. And hardware supported PIM routing (so that multicast can be routed from one VLAN to another without using the CPU). Or putting a Tile CPU in these switches might work also.
 
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Re: IGMP Snooping

Fri May 30, 2014 10:32 am

IGMP Snooping would be definately useful :)
 
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Re: IGMP Snooping

Wed Jun 04, 2014 5:57 am

+1 for IGMP snooping, multicast floods on wlan interfaces which works in bridge.
 
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Re: IGMP Snooping

Wed Jun 04, 2014 9:45 am

mikrotik don't care users opinion, they better know what we need.
WBR, 3bs =)
 
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Re: IGMP Snooping

Mon Jun 16, 2014 1:27 pm

Now that I need it...

+1 for IGMP snooping!
 
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Re: IGMP Snooping

Mon Jun 16, 2014 5:30 pm

+1 for IGMP snooping, multicast floods on wlan interfaces which works in bridge.
Exactly the same here.
In a typical rental setup we have about 200...500MBit of multicast traffic.
And we need some Access Points in the same L2 domain but without the multicast...
Manually filtering multicast from these ports makes the CPU go wild on 2011 and Metal Series.
And budget not always allows CCR series for each and every station (as we have about 20...50 RB devices in one setup...)
So +10 for IGMP snooping from me as well :-)

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Re: IGMP Snooping

Tue Jun 17, 2014 4:06 pm

I don't understand that multicast-fdb. how is it used and for what we can use it?
Take a look at this thread:
http://forum.mikrotik.com/viewtopic.php ... 57#p431957

1. Multicast FDB appears to only work within a VLAN (can't forward from one VLAN to another)
2. Multicast is forwarded to all ports by default but if an entry exists in the FDB, it is only forwarded to the ports in that entry and filtered on all other ports in that VLAN.
 
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Re: IGMP Snooping

Wed Jun 18, 2014 8:29 pm

I am glad I came across this thread! We have been planning for several months a full scale deployment of MikroTik CRS125 to all of our tower sites to segregate broadcast domains. However, if IGMP snooping is not implemented in the CRS125, then this becomes a moot point since there is so much multicast traffic in existence now days. We will have to re-evaluate the purchase of MikroTik hardware until such time as MikroTik implements IGMP snooping.

Our deployment can wait a few more weeks, but at that point we will have to look at other options.

Jay
 
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Re: IGMP Snooping

Mon Jun 23, 2014 5:45 pm

Прошу прощения за мой английский, буду высказываться максимально просто. К сожалению не владею английским. Всё валю на google переводчик если что. Не знаю, как в Европе и Америке,но в России довольно не плохо развито iptv multicast. Те средства обработки multicast трафика,что имеются в продукции MikroTik явно не достаточны для элементарного применения дома. Крайне необходимы пакеты udpxy и igmp snooping. Без обид,Латыши Вы тормозите,распространение собственной продукции. Без условно MikroTik,как it компания,облапошит всех конкурентов в виде гигантов: ASUS,CISCO и "наступающий на пятки" руко-кривых китайцев,но дешёвых d-link и tp-link. Ваша продукция не может не вызывать восхищения,она почти безупречна. Но будьте толерантны к простым пользователям,и к Вам потянутся. Udpxy и Igmp-snooping уже обыденность для современных реалий ip,включите пожалуйста их в свою новую прошивку! Либо устройте голосование за включение этих функций в routerOS, если сами сомневаетесь,пусть пользователи решат! В любом случае,если эти пакеты не нужны,то их можно и не включать!!!

Нет у меня уверенности,что гугл переводчик переведёт нормально....

Sorry for my English, I speak as simple as possible. Unfortunately do not know English. All exchange on google translator if that. I do not know, as in Europe and America,but in Russia rather poorly developed iptv multicast. The means of processing multicast traffic that are in production MikroTik clearly not sufficient for basic home use. It is extremely necessary packages udpxy and igmp snooping. No offense,Latvians You slow down,the distribution of its products. Without conditionally MikroTik,as it company,will allapotat all competitors in the form of giants: ASUS,CISCO and "coming on the heels of" lead-curves Chinese,but cheap d-link tp-link. Your products can not but arouse admiration,she's almost perfect. But be tolerant to simple users,and will listen to You. Udpxy and Igmp snooping is already the ordinary for modern realities ip,please include them in your new firmware! Or arrange a vote for the inclusion of these functions in routerOS, if in doubt,let the users decide! In any case,if these packages are not needed,they can not be enabled!!!
 
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Re: IGMP Snooping

Mon Jun 30, 2014 10:53 pm

IGMP Snooping would be definately useful :)
Actually it is "must have" on CRS series, to even think about IPTV deployments... :-?

Still makes me wonder, why it is so hard to implement?
Even sub 30$ Home "soapbox" routers have it now in conjunction with IGMP Proxy.
 
leonset
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Re: IGMP Snooping

Tue Jul 01, 2014 9:29 am

Still makes me wonder, why it is so hard to implement?
Even sub 30$ Home "soapbox" routers have it now in conjunction with IGMP Proxy.
http://en.wikipedia.org/wiki/IGMP_snoop ... ard_status

Despite it's broad usage and usefulness, IGMP snooping is not an industry standard. That alone might not make it harder to implement, but would require some amount of interoperability tests, debugging and so on. Also, RouterOS is Linux based and I don't know the status of IGMP snooping implementation in the Kernel... that could help if it is mature enough.

Anyway... Mikrotik, we need IGMP snooping! :)
 
roadracer96
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Re: IGMP Snooping

Tue Jul 01, 2014 9:09 pm

Routeros being linux based doesn't help when the switch chip needs to do be able to implement it, not routeros (outside of bridge ports).

Im gonna throw PIM snooping out there too.. That'd help with multicast over VPLS links. :D
 
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Re: IGMP Snooping

Thu Jul 03, 2014 5:14 am

And after a little playing at home last night, capsman bridge ports. 7mbit of multicast from iptv on the wire (same bridge) as the cap interfaces crushed it. Couldn't even get a dhcp address.
 
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Re: IGMP Snooping

Wed Aug 06, 2014 2:01 pm

right now i do not care, whether the CRS series will support snooping or not.

i'd like to use crs1016-12s-1s+ in an gigabitethernet aggregation network, where i have only csco switches, and snooping is a must.
for the time of being - to start the migration - i'd have to use them as L2 only devices [so with bridge groups, and so on]
w/o igmp snooping it will break the iptv service... that means a no-go for replacing a bunch of outdated cisco switches.

it could mean tens or probably (1-2) hundreds of new ccr1016 deployments if it would support igmp snooping.

+1 for igmp snooping on bridge interfaces on routers
#TR0359
 
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Re: IGMP Snooping

Wed Aug 06, 2014 2:36 pm

Why use "expensive" CCR as pure L2 device when much cheaper CRS can handle it on wirespeed aswell... :shock:

I would understand if you would use it for L3 traffic and then using PIM would make more sense on CCR.
 
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Re: IGMP Snooping

Wed Aug 06, 2014 3:57 pm

Why use "expensive" CCR as pure L2 device when much cheaper CRS can handle it on wirespeed aswell... :shock:

I would understand if you would use it for L3 traffic and then using PIM would make more sense on CCR.
because of the SFPs. in an all optical network you need them. and considered the cisco gear, CCR is not expensive at all :-)
#TR0359
 
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Re: IGMP Snooping

Wed Aug 06, 2014 4:09 pm

because of the SFPs. in an all optical network you need them. and considered the cisco gear, CCR is not expensive at all :-)
Cisco is more expensive indeed, but I was referring to Mikrotik products.
Nevertheless that explains it pretty well, why you specifically need CCR`s for this.
 
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Re: IGMP Snooping

Tue Oct 14, 2014 2:12 pm

*bump*

+1 for IGMP Snooping.

I guess everyone who tries IPTV with a MikroTik faces the same issue and the solution always ends up being the same; use a standard consumer router instead :(
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Re: IGMP Snooping

Wed Oct 22, 2014 1:50 pm

I just bought an 2011 router to use it in home network and somehow i expected, that it supports IGMP snooping out of the box. It seem's to me, that i will run in to a lot of problems, since i have a lot of Multicast traffic in my network.

Looking it this way, it's realy sad, that i can use IGMP snooping on old TpLink with OpenWRT but i can not use it on new Mikrotik...

So +1 for this option from me.
 
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Re: IGMP Snooping

Tue Nov 04, 2014 12:46 am

IGMP snooping is a must for me too. It was great disappointment for me when I found out that MikroTik doesn't support it.

So +1 for IGMP snooping.

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