SRW208: IGMP Snooping not working!
Hi all,
at the moment we have trouble with the following SRW208 setup:
- Port mirroring is enabled (Port 8 mirrors Port 1) for sniffing via Wireshark in promiscuous mode.
- 'IGMP Snooping' is enabled for all ports.
Our test scenario:
- an IPTV settop-box is connected to port 1 and gets/sends traffic from/to a VDSL router connected to port 2.
- a wireshark PC sniffs at mirror port 8 (all traffic) in promiscuous mode
- another wireshark PC sniffs at port 3 (all traffic) in promiscuous mode
With IGMP snooping enabled only the wireshark PC at (mirroring) port 8 should be able to sniff the mcast traffic between the settop-box and the VDSL router.
The problem is that wireshark can sniff the mcast traffic at all ports. In addition the LED of all active ports are blinking synchronously/continuously.
It seems that the IGMP snooping does not to work properly because all ports are still flooded with mcast traffic.
With an old Zyxel switch the same setup works without a problem.
Is this a known problem of the srw208?
Cheers,
Fred
So much for the image upload, how about this diagram:
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Spirent 3 --------------| SRW2008 |------------------ Spirent 4
| |------------------ Spirent 5
| |------------------ Spirent 6
| |------------------ Spirent 7
| |------------------ Spirent 8
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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,
davidHi 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
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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
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ip igmp snooping vlan 1 querier
interface vlan 1
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exit
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Hope this helps you and others
regards Dave -
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! -
Multicast Does not work between different VLANS
Hi,
I have problems with multicast. On the same VLAN i can see the SAP announcement in VLC and play, but on different VLAN i can see SAP but i cant play it. The play turn to pause and the video doesn´t appear.
I have 2 Cisco 6500 switch CORE with GLBP configured but not working. In the second switch i have all interfaces in shutdown. The first core switch have L3 routing enable.
The Global configurations:
ip multicast-routing.
I have the transmitter PC on vlan 51 i transmit to 230.0.0.50 group an im trying to recive on vlan 80. The vlans configurations are:
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I have 2 Cisco 2960 (L2 only) for the access.
The principal commands outputs are:
CORE1#show ip mroute | inc 230.0.0.50
(*, 230.0.0.50), 01:50:50/00:02:21, RP 0.0.0.0, flags: DC
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CORE 1
interface Vlan1
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ip access-group 101 out
no ip unreachables
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mls rp ip
interface Vlan51
ip address x.x.31.254 255.255.255.0
ip access-group 151 out
ip helper-address x.x.x.x
ip helper-address x.x.x.x
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ip access-group 150 out
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glbp 51 forwarder preempt delay minimum 60
interface Vlan80
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shutdown
mls rp ip
glbp 80 ip x.x.80.254
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glbp 80 timers redirect 600 7200
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Someone can help?
Thanks,
AlfredoHi johnd...
Im using VLC 1.1.2 (i can not update because i have a DVDT2 card to capture the digital terrestrial television and it only work in this version). I have all the firewalls down.
This is the output for the show ip igmp snooping groups on the 2960.
80 230.0.0.50 igmp v2 Gi1/0/21, Gi1/0/24
Port G1/0/21 is where the receiver is conected and the 24port is the trunk.
Jon, i revert and this is the output. I put the ip pim rp-address the same of the lookpback that i create previously.
(*, 230.0.0.50), 00:37:46/00:02:19, RP 192.168.230.230, flags: SJC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Vlan80, Forward/Dense, 00:09:52/00:00:00
The strange thing is that I have more than 40 vlans and it only fail in some vlans like 80. -
Multicast WDS Imaging Not Working - Doesn't show up when booted via PXE..?
I have a lab environment setup specifically for imaging laptops via WDS. I have a stand alone Windows 2012 server connected directly to an 8-Port Cisco SG-220 8 Port switch. Nothing else is connected to this server and it is not being
used for anything else. The server is running DHCP and WDS. I can boot laptops via PXE and connect to the WDS server to deploy the images through standard WDS imaging. However, I have not been able to get Multicasting to work. I
have never used Multicasting before and have read through the documentation but must be missing something. This is what I've done:
1. In the WDS server I right click on my deployment image and select 'create multicast image' then go through the prompts to create an auto-cast image.
2. The Multicast image is created and shown as 'waiting' on the WDS server.
3. The Cisco router is brand new out of the box, the only configuration I did was to enable IGMP snooping. I did not make any other changes to the setup of the switch.
4. I boot a target machine via PXE using the same Boot Image that I always use. It loads to the screen where I can select the image I want to deploy but it never shows the multicast image as an option. I only see the regular image I had previously
been using.
I'm not sure what else I'm missing in order to get the target machine to connect and image using the multicast image.
Here are a few screen shots of what I have setup:
Here is the multicast image created on the server
Here is the Cisco Router configuration:
Here is the NIC card configuration on the server:
This is the target laptop booted via PXE but it never shows the multicast image as an option.
/>Hi AdamNYC31,
The multicast feature used by WDS uses Internet Group Management Protocol (IGMP) version 3. Your network switches will need to support this, and you’ll need to configure them
for multicast. Please refer the following similar thread check each step Aaron Tyler and Ron St and Ankit Oberoi offered solution.
Multicast issue: Always "Waiting"
https://social.technet.microsoft.com/Forums/windowsserver/en-US/18122b39-e707-455d-b22f-956ebfb95e40/multicast-issue-always-waiting?forum=winserversetup
I’m glad to be of help to you!
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected] -
Airplay not working with an ASA in the middle
Hi All
This is my case: In the lab I could configure mDNS on my 5508 with the global multicast and igmp snooping disabled. Only I needed was Global mDNS multicast enabled (based on Cisco Guide) and it worked fine under the following scenarios:
All the services connected wireless
IPAD on subnet A and Apple TV on subnet B, no Firewall in the middle. Peer to Peer Blocking in the WLC was any DROP or DISABLED and it worked fine.
BUT, when I moved into production environment, the only way that it works is by having both Apple Devices in the same subnet with the Peer to Peer bloking DISABLED. I have a firewall ASA in the middle so I do not know what should I check in the firewall to allow Airplay to work.
However, there is something really weird. in the IPAD, I can see the AIRPLAY icon at the bottom of the screen, when I click on it, I can see MIRRORING button and I moved it to the right to activated it BUT nothing happens on the AppleTV connected to an screen. I mean, looks like the request for MIRRORING from the IPAD to the Apple TV device is not reaching the last one. A few seconds after activating MIRRORING in the IPAD looks like the request is dropped since that the mirroring is not active.
Is there any particular multicast configuration required in the ASA including ports (like 5353 udp)?
I have an open case with TAC but any ideas are welcomed.
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thanks
AbrahamHi David,
Let me share with you my findings. Apple TV requires more than 5353 port opened. Please see the following link and include in your ASA those additional ports/range. I mean, 7000, 7100, 5000 (udp/tcp), etc etc.
http://community.arubanetworks.com/t5/Unified-Wired-Wireless-Access/apple-macbook-airplay-appletv-firewall-port-findings/td-p/55048
After opening those ports, the service is working BUT with significant LATENCY/SLOWNESS which we are trying to solve.
We took some packets captures on the ASA ingress/egress interfaces for both contexts (see pictures attached) and I could see many retransmissions and duplicated ACK so I tried something else that worked (see Apple TV Works attached file) BUT this is not the final solution we need so we are still working on this issue in order to check if there is something wrong with our routing/switching process in the 6500 LAN SW.
I created static routes in the ASA contexts to communicate the IPAD to the APPLE TV (ports already opened in the ASA as indicated before) without traversing the Wireless 6500 SW (test performed on VLAN A and VLAN B) and it worked fine. However as I said, this is not the solution we want because the Wireless 6500 SW must manage inter-ASA-contexts traffic.
In addition to that I attached another picture/diagram that shows when Apple TV service fails-latency (traffic crossing the Wireless 6500 SW for communication between ASA contexts).
Important to say that I am NOT using MULTICAST or BROADCAST ENABLED in the WLC. I am based on mDNS as indicated in the Cisco Guide/Instructions for version 7.5 and above.
Hope this helps. -
Home sharing not work over d-link router (lan - wi-fi)
I have d-link dsl-2640u. It has 4 Ethernet ports and wi-fi AP. My iTunes is installed on pc that connected to d-link through Ethernet. And I have iPad connected to the d-link via wi-fi. So, the library that is shared on my pc, don't showing up in the iPad. But when I unplug LAN cable from pc and then plug the wi-fi adapter in, and connect to d-link wi-fi - all work fine. All devices use 192.168.1.1-10 ip. Can anybody help me? How provide sharing from the ethernet to wi-fi.
I solved the problem! First of all, i installed the latest firmware for the DSL-2640u.
The Next steps include the following:
1. Turned of the firewall in WAN interface
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3. Enable "Enable WAN Service" & "Enable IGMP Multicast"
4. Advanced Setup->LAN-> Enabled "Enabled IGMP Snooping"
5. Advanced Setup->Interface Group. Group "default" include Wireless(SSID1), LAN1, LAN2, LAN3, LAN4
6. Wireless -> wireless bridge -> Bridge Restrict turned to "disabled"
Last steps (maybe, its not necessary)
1. Advanced Setup->NAT -> Virtual Servers -> ADD TCP/UDP port 3689 & ADD UDP port 5353 for 192.168.1.2
2. Advanced Setup->NAT -> Port Triggering -> ADD TCP port 3689 & ADD UDP port 5353
3. Advanced Setup->NAT -> DMZhost -> ADD 192.168.1.2 (my pc IP-adress) -
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. -
IGMP snooping functionality on apple time capsule & extreme
Hi,
I use an apple time capsule which has 7.7.3 version in it. There is an option in apple capsule to enable or disable IGMP snooping,
Does apple capsule disables forwarding multicast packets on disabling IGMP snooping?
On wire-shark, I can see an IGMP query message is going out of apple capsule on enabling "IGMP snooping" and there is no IGMP query message from apple capsule when IGMP snooping is disabled. Based on IGMP V3 standard, a IGMP query is sent by router. On "IGMP snooping" disabled case, is it host's responsibility to forward multicast packets?
And I have an airport extreme as well which does not have IGMP snooping enable/disable functionality. How IGMP and multicasting works on this?
ThanksAnd I have an airport extreme as well which does not have IGMP snooping enable/disable functionality. How IGMP and multicasting works on this?
What model and firmware is the extreme?
If you look under the wireless options in the 5.6 utility it shows multicast as preconfigured to on.. and set to low by default. you had the option to set higher if you wished with the result that more of the wireless bandwidth was reserved to handle multicast.
You might need to use the older utility if it is Gen5 or earlier as some functionality was simply removed in the v6 airport utility and never returned.
IGMP never rates a mention.
On wire-shark, I can see an IGMP query message is going out of apple capsule on enabling "IGMP snooping" and there is no IGMP query message from apple capsule when IGMP snooping is disabled. Based on IGMP V3 standard, a IGMP query is sent by router. On "IGMP snooping" disabled case, is it host's responsibility to forward multicast packets?
I cannot answer your specific question.. but is the IGMP set on by default?? If so I expect apple was thinking it should automatically handle the bandwidth demand whereas the older ones had issues with this and needed manual setting when using wireless. If you turn it off then multicast will have issues I am guessing. -
IGMP Snooping in Switch Hierarchy
Hello,
I have a question regarding IGMP when more than one switch is between mcast router and the hosts.
My setup is as follows:
mcastrouter1
|
Core1
| \
| Access-Switches (several) - hosts
| /
Core2
|
mcastrouter2
The core-switches are cat6k (native), the access-switches a mix of cat3550 and cat4506.
The mcast routers are connected to the core switches, the hosts connect to the access switches. IGMP Snooping is enabled on all switches.
On the core switches I see the IGMP entries in the MAC table just fine, but they somehow seem not to arrive at the access-switches. We tried all the debugs we can think of, but we cannot see any IGMP messages arriving at the access switches, where the hosts are connected. The mcast routers and the hosts are in the same VLAN. This VLAN is configured on the core and the access switches. One of the core switches is the STP root.
The trunks between the core and the access switches are dot1q trunks over glas links. All switches use 12.1 software.
Is this behaviour works-as-designed? I would expect that the IGMP messages are flooded throughout the VLAN, and this is terminated on the access switches. So the access switches should see the messages as well. Our tests tell us that the IGMP messages do not make it to the access switches. I cannot see why the switch should filter the message, because it should be forwarded to the hosts in any case.
Every document I checked on CCO has always one switch between the mcast router and the host.
If anyone has any tips or documents that may help me, I would really appreciate it.
Thanks
-birgitHi,
Not sure if this helps much but we are using CGMP in our environment as we have lots of legacy switches at the moment.
I can see lots of CGMP join messages throughout the layer2 switches and would expect to see the same for IGMP
2005 Aug 04 09:27:09 GMT +00:00 %MCAST-6-RX_CGMPJN:CGMP: Rcvd CGMP Join Mesg vla
n 20
2005 Aug 04 09:27:09 GMT +00:00 %MCAST-6-RX_CGMPJN:CGMP: Rcvd CGMP Join Mesg vla
n 40
2005 Aug 04 09:27:09 GMT +00:00 %MCAST-6-RX_CGMPJN:CGMP: Rcvd CGMP Join Mesg vla
n 40
2005 Aug 04 09:27:10 GMT +00:00 %MCAST-6-RX_CGMPJN:CGMP: Rcvd CGMP Join Mesg vla
I'm looking for a switch that supports IGMP so i can enable snooping and see what happens and will report back.
Thanks
Paddy -
BonJour not working WLC5508, I tried other forums instructions
Hi All, I have the attached diagram and I followed the instructions from another posts / forum cases and the Apple TV is still not working.
My questions are:
1.-The WLC controller and AP must be in the same subnet?. This is not my case, the AP 3500 is operating in a remote location and I have a centralized WLC 5508.
2.- I already configured the Controller --- > General --- > Broadcast forwarding (enable) + AP Multicast Mode (Multicast / IP: 239.20.226.197).
3.-I already configured the Controller --- > Multicast ---- > Enable Global Multicast Mode (selected) + Enable IGMP Snooping (selected) + Enable MLD Snooping (selected). Please see the attachment.
4.-Do I have to configure something in the Mobility Management --- > Multicast Messaging --- > (Enable Multicast Messaging + Local Group Multicast IP Address) ?????
The Apple TV Device and Ipad are authenticated in the ISE using certificates with no issues and both got IP's from the DHCP for the WLAN Vlan assigned to the SSID activated (see pictures attached).
thanks in advance for any orientation,
Abraham#When both appletv and ipad on wireless on same ssid and vlan then Multicast to Unicast works perfectly without any wired side configuration. Because the packet never leaves the wlc/hits the wired interface. To conserve RF bandwidth, if you prefer to use Multicast to Multicast for this scenario make sure to have Multicast routing enabled on wired side for all involved vlan interfaces from WLC. With M-U, wireless Multicast source and destination should be on same vlan for bonjour however AP and WLC can be on different vlan. Since the Multicast source and destination of the actual traffic belong to same vlan and it is also encapsulated on unicast capwap it will forward the packet without an issue, basically it dumps the Multicast traffic on same vlan.
#With the above scenario if you prefer to use Multicast to Multicast then keep the WLC Management, AP and Wireless client on WLC's management vlan. this way it doesn't require Multicast routing on wired side. So here, if AP is on different vlan than management then the intermediate wired device need to know how to dump the Multicast packet that is sourced from Management of wlc to AP's Multicast group address that's why we need the Multicast routing for WLC and AP vlan on wired side.
#AP Multicast - Multicast is required When we've wired apple device on same vlan like wireless then need to enable Multicast routing on wired side E2E for all the WLC involved vlan interfaces i.e, wired(wireless) client, AP, WLC management VLAN.
#Difference is, as WLC receives the actual multicast data packet, when using M-U it sends out the actual Multicast data packet encapsulated in unicast capwap to AP's ip (sourced from WLC's management interface ip) and with M-M enabled, it sends the actual Multicast data packet encapsulated in unicast capwap but send to Multicast AP group ip (sourced from Management ip of wlc) that is configured. It is applicable only for Downlink traffic ie., WLC to AP, the uplink is always unicast from wireless client to ap to wlc. -
Igmp version compability / IGMP Snooping
Hello Everyone.
I'm doing a master thesis on networking and have a question about IGMP Snooping.
In a Standard towards offshore networking, it states that IGMP Snooping does not work with different IGMP versions. I have only found one forum discussion where some had issues of adding a IGMPv3 host to a running IGMPv2 network. Sadly the discussion did not give out if they fixed the solution.
From what I have read theoretically there shouldn't be any issues with applying new nodes with IGMPv3 in either IGMPv2 or IGMPv1 since the latest version is described as backwards compatible with both earlier versions.
So have anyone had any experience with this issue and how was it resolved?Set sysctl options:
/sbin/sysctl net.inet.igmp.default_version=2
/sbin/sysctl net.inet.igmp.sendra=0
Restart VLC -
Home Sharing not working between wireless PC's / devices and ethernet wired PC's on the same router.
Home Sharing is not working between wireless PC's / devices and ethernet wired PC's on the same router. I installed a new Verizon FIOS ActionTec MI424WR GigE wireless / ethernet router, replacing the original FIOS router. With the old router Home Sharing worked fine across and among all iOS and Windows wired and wireless devices. With the new router Home Sharing works between and among the Wired PC's but not between the wired PC's and the Wireless connected PC's or iOS devices. Home Sharing also works between and among the wireless connected PC's and iOS decices but not between them and the wired PC's.
Only the router was changed. No changes were made to any of the devices except all were updated with the latest version of iTunes 10.7.0.21 and the iSO devices were updated to iOS vrsion 6.01. Three PC's are wired and all are running Windows 7. There also is a Windows Home Server connected to the router by ethernet port. It does not run iTunes but does provide WebDAV services to my iOS devices. This works fine. Two PC's are wireless, one running Windows 7 and one running Windows 8. All of the PC's are connected to the same (new) router via it's ethernet ports and it's wireless access point. Two of the wired PC's are connected via a high-speed ethernet hup that is connected to the router (Home Sharing works fine between the two PC's on the hub and the PC on the router). All wired and wireless devices on the router are visible and members of the router's Home/Office virtual network.
All of the PC's are visible in the Windows network and all shared files are accessable from all PC's, both wired and wireless.
Obviously the router seems to be the issue, something between the ethernet and the wireless access point components. I checked the settings and found nothing that would prevent Home Sharing between the wired and wireless devices. There is no setting that isolates the wireless network. I have done the following:
Read the router user manual and checked all the settings
Rebooted the router and tested.
Turned off the router's firewall and tested.
Home Sharing is turned on all the devices and all use the same Apple ID.
Restarted iTunes and tested.
Verified iTunes is "Allowed" in each PC's firewall.
Again, I can Home Share between the two wireless PC's but not between either of the wireless PC's and any of the wired PC's. I can Home Share between my iPads and iPhones and either of the two wireless PC's but not with any of the wired PC's. I can Home Share between any of the wired PC's but not between any wired PC and a wireless PC or iOS device.
I hope someone may have had a similar problem and has a fix suggestion. I'm stumped! I have a;so contacked ActionTec and awaiting an answer.Solution from ActionTec is:
Log into your router.
Click the Advanced icon
Cclick Yes
Click on the IGMP Proxy
Select Disable
Click Apply
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