Hi,
I am running a Juniper M10 as Multicast router in my network. It automatically becomes the DR of the "VLAN" as the Linux server is situated on. I also have other Linux servers on that switch in the same VLAN and IGMP-snooping is working for them.
They are running RedHat and not Suse though. They are not listed as "Router" by the Summit450X.
When doing a tcpdump on my Linux server I do not see any traffic going to 224.0.0.2 (all routers) so I don't understand why the switch lists that Linux as a router. Really strange...
BR
/// Fredrik
From: MLouis@nwnit.com
To: fabian.extr@gmail.com; extreme-nsp@puck.nether.net
Date: Tue, 16 Sep 2008 08:10:44 -0400
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?
In my experience, IGMP snooping will not work unless the layer 2 switch snoops the client report. Meaning you have to have clients who want to join a group sending IGMP join reports that the switch
can snoop. This usually requires that something be performing the quierier process, ie a multicast enabled router. 224.0.0.2 is all routers MC address. Enable PIM on the router and see if IGMP snooping works.
From: extreme-nsp-bounces@puck.nether.net [extreme-nsp-bounces@puck.nether.net] On Behalf Of Fabian [fabian.extr@gmail.com]
Sent: Tuesday, September 16, 2008 7:28 AM
To: extreme-nsp@puck.nether.net
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?
Hi Frederik,
If your server is considered as a Router, that means that it is advertising on multicast address :
224.0.0.2
So do a TCPDUMP to check if so and verify if you don’t have a router feature enabled.
Regards, Fabian.
From: extreme-nsp-bounces@puck.nether.net [mailto:extreme-nsp-bounces@puck.nether.net]
On Behalf Of F J
Sent: mardi 16 septembre 2008 12:26
To: extreme-nsp@puck.nether.net
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?
Hi,
Thanks for your answer. But isn't the BCR and CBSR config only important if
you are running the Switch in layer3?
I am only using it as a layer2 switch.
I still think that it is strange that the switch is considering this server as being
a "router" when running the show commands. There must be some critera for
the switch to do that or?
More info about this Linux server:
My Linux server is running JBoss and I see some IGMP-join packages to going to
224.0.0.75 and 228.30.4.76 when starting up.
Best Regards
/// Fredrik
Date: Tue, 16 Sep 2008 11:52:02 +0300
From: napstertash@gmail.com
To: ripprapp@hotmail.com
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?
CC: extreme-nsp@puck.nether.net
Hello FJ,
On Tue, Sep 16, 2008 at 8:21 AM, F J <ripprapp@hotmail.com> wrote:
Hi,
I am using a Summit450X as a layer2 switch in my multicast network.
I am using PIM SM on my routers and I am running IGMP snooping on my layer2 switches.
On this 450X-switch I have a HP server runnning Linux connected to port 21.
When running some show commands (see below) it looks like the switch thinks that the
server is a router? And that it should get all Multicast streams?
You might have to play a lot more with the priorities so you figure this out, I would think.
Can anyone explain what is causing this?
I think the answer might be between the configuration settings you have got for both the BSR and CBSR.
Is my switch misconfigured or is my server doing something strange?
What is the criteria for being listed as a router by the switch?
Port 45 is connected to the closest router.
Any ideas of what could be causing this kind of behaviour is appreciated!
If you don't want this box to participate the the multicast traffic then I would suggest you remove that port form the selected list, OR make the specified port that you
want to be the BSR by using the priorities.
Hope it helps.
Regards
Best Regards
Fredrik
X450a-48tdc.19 # sh igmp snooping
Vlan Vid Port #Senders #Receivers Router Enable
--------------------------------------------------------------
SN102 164 6 Yes
19 2 No
20 5 No
21 3 Yes
45 0 Yes
VLAN SN102 (164) Snooping=Enabled
Group Sender Age
239.1.1.1
10.21.65.5 14
239.1.1.2
10.21.65.5 10
228.0.198.75
10.21.64.4 25
228.0.198.76
10.21.64.4 13
228.0.198.77
10.21.64.4 13
5 Incoming multicast streams
Port Host Subscribed Age
19 10.21.64.2
225.10.10.10 66
19 10.21.64.2
226.10.10.10 63
20 10.21.64.3
224.2.127.254 67
20 10.21.64.3
224.2.127.255 69
20 10.21.64.3
234.5.6.7 63
20 10.21.64.3
239.1.1.1 64
20 10.21.64.3
239.1.1.2 61
21 10.21.64.4
228.0.198.75 68
21 10.21.64.4
228.0.198.76 63
21 10.21.64.4
228.0.198.77 60
21 10.21.64.4 All Groups 69
45 10.21.64.1 All Groups 1
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---------
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- -- http://www.i-hate-computers.demon.co.uk/
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I am running a Juniper M10 as Multicast router in my network. It automatically becomes the DR of the "VLAN" as the Linux server is situated on. I also have other Linux servers on that switch in the same VLAN and IGMP-snooping is working for them.
They are running RedHat and not Suse though. They are not listed as "Router" by the Summit450X.
When doing a tcpdump on my Linux server I do not see any traffic going to 224.0.0.2 (all routers) so I don't understand why the switch lists that Linux as a router. Really strange...
BR
/// Fredrik
From: MLouis@nwnit.com
To: fabian.extr@gmail.com; extreme-nsp@puck.nether.net
Date: Tue, 16 Sep 2008 08:10:44 -0400
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?
In my experience, IGMP snooping will not work unless the layer 2 switch snoops the client report. Meaning you have to have clients who want to join a group sending IGMP join reports that the switch
can snoop. This usually requires that something be performing the quierier process, ie a multicast enabled router. 224.0.0.2 is all routers MC address. Enable PIM on the router and see if IGMP snooping works.
From: extreme-nsp-bounces@puck.nether.net [extreme-nsp-bounces@puck.nether.net] On Behalf Of Fabian [fabian.extr@gmail.com]
Sent: Tuesday, September 16, 2008 7:28 AM
To: extreme-nsp@puck.nether.net
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?
Hi Frederik,
If your server is considered as a Router, that means that it is advertising on multicast address :
224.0.0.2
So do a TCPDUMP to check if so and verify if you don’t have a router feature enabled.
Regards, Fabian.
From: extreme-nsp-bounces@puck.nether.net [mailto:extreme-nsp-bounces@puck.nether.net]
On Behalf Of F J
Sent: mardi 16 septembre 2008 12:26
To: extreme-nsp@puck.nether.net
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?
Hi,
Thanks for your answer. But isn't the BCR and CBSR config only important if
you are running the Switch in layer3?
I am only using it as a layer2 switch.
I still think that it is strange that the switch is considering this server as being
a "router" when running the show commands. There must be some critera for
the switch to do that or?
More info about this Linux server:
My Linux server is running JBoss and I see some IGMP-join packages to going to
224.0.0.75 and 228.30.4.76 when starting up.
Best Regards
/// Fredrik
Date: Tue, 16 Sep 2008 11:52:02 +0300
From: napstertash@gmail.com
To: ripprapp@hotmail.com
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?
CC: extreme-nsp@puck.nether.net
Hello FJ,
On Tue, Sep 16, 2008 at 8:21 AM, F J <ripprapp@hotmail.com> wrote:
Hi,
I am using a Summit450X as a layer2 switch in my multicast network.
I am using PIM SM on my routers and I am running IGMP snooping on my layer2 switches.
On this 450X-switch I have a HP server runnning Linux connected to port 21.
When running some show commands (see below) it looks like the switch thinks that the
server is a router? And that it should get all Multicast streams?
You might have to play a lot more with the priorities so you figure this out, I would think.
Can anyone explain what is causing this?
I think the answer might be between the configuration settings you have got for both the BSR and CBSR.
Is my switch misconfigured or is my server doing something strange?
What is the criteria for being listed as a router by the switch?
Port 45 is connected to the closest router.
Any ideas of what could be causing this kind of behaviour is appreciated!
If you don't want this box to participate the the multicast traffic then I would suggest you remove that port form the selected list, OR make the specified port that you
want to be the BSR by using the priorities.
Hope it helps.
Regards
Best Regards
Fredrik
X450a-48tdc.19 # sh igmp snooping
Vlan Vid Port #Senders #Receivers Router Enable
--------------------------------------------------------------
SN102 164 6 Yes
19 2 No
20 5 No
21 3 Yes
45 0 Yes
VLAN SN102 (164) Snooping=Enabled
Group Sender Age
239.1.1.1
10.21.65.5 14
239.1.1.2
10.21.65.5 10
228.0.198.75
10.21.64.4 25
228.0.198.76
10.21.64.4 13
228.0.198.77
10.21.64.4 13
5 Incoming multicast streams
Port Host Subscribed Age
19 10.21.64.2
225.10.10.10 66
19 10.21.64.2
226.10.10.10 63
20 10.21.64.3
224.2.127.254 67
20 10.21.64.3
224.2.127.255 69
20 10.21.64.3
234.5.6.7 63
20 10.21.64.3
239.1.1.1 64
20 10.21.64.3
239.1.1.2 61
21 10.21.64.4
228.0.198.75 68
21 10.21.64.4
228.0.198.76 63
21 10.21.64.4
228.0.198.77 60
21 10.21.64.4 All Groups 69
45 10.21.64.1 All Groups 1
Connect to the next generation of MSN Messenger
Get it now!
Explore the seven wonders of the world
Learn more!
_______________________________________________
extreme-nsp mailing list
extreme-nsp@puck.nether.net
https://puck.nether.net/mailman/listinfo/extreme-nsp
--
Ronnie Tash
---------
A: Because we read from top to bottom, left to right.
Q: Why should i start my reply below the quoted text?
- -- http://www.i-hate-computers.demon.co.uk/
----------------------------------------------
Connect to the next generation of MSN Messenger
Get it now!
Note: This message and any attachments is intended solely for the use of the individual or entity to which it is addressed and may contain information that is non-public, proprietary, legally privileged, confidential,
and/or exempt from disclosure. If you are not the intended recipient, you are hereby notified that any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify
the original sender immediately by telephone or return email and destroy or delete this message along with any attachments immediately.
_________________________________________________________________
Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy!
http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mkt=en-us