[c-nsp] Multicast packets dropping at 6509

[Matthew Huff]

Do you have pim or igmp snooping turned on?

Without a layer 3 "multicast router" configured, the 6509 will probably shunt the traffic. Setup a SVI interface on that vlan and enable pim dense mode. If you don't want multicast to pass the layer 3 boundry, you can setup a multicast boundry command on the vlan.


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ambedkar
Sent: Tuesday, October 30, 2012 2:23 AM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Multicast packets dropping at 6509

Hi,
Phil Mayers:
1. Data rate:    4 kbps
2. Line cards: 1000BaseX supervisor WS-X6K-S2U-MSFC2
                       1000BaseX Ethernet, WS-X6408A-GBIC
                        CatOS 8.3

Matthew:
1). As we are in the same VLAN, the data is not going to Lyaer-3
2). we are using, pim-dense

Null:
we are not observing such kind of behaviour. what we are observing is that
one of the switch is not creating any multicast table, when we  see in the
mac-address table multicast, there is no multicast table. when we replace
Cisco 6509 with cisco 2950 switch it is working fine.

                                       thank you

On Mon, Oct 29, 2012 at 11:08 PM, null zeroroute
<nullzero.route at gmail.com>wrote:

> I'm familiar with a bug CSCsk07136 that was found about 4 years ago that
> causes the multicast table to dump on a hybrid 6500 (catos) every time a
> port in the same VLAN went down/up.  Basically, all members of a group
> would lose access to the group every time a port in the same VLAN, on the
> same 6500, dropped.  I believe the problem was fixed in a later release,
> however we upgraded to native and no longer experienced the issue.  The
> only workaround was to statically assign hosts to the required groups.
>
>
> On Mon, Oct 29, 2012 at 6:18 AM, Ambedkar <p.ambedkar at gmail.com> wrote:
>
>> Hi,
>> I am facing a problem in multicast..
>> The scenario is like this, 2 layer-2 switches(2950) and 1 Layer-1
>> switch(cisco 6509).
>> These three switches are connected in series, L2-L3-L2. The problem is the
>> packets are dropping at L3(Cisco 6509) switch using catOS. The multicast
>> data is flowing in SAME vlan, means eventhough L3 is there in between, the
>> data is flowing at layer-2 only.
>>
>> Please help me...
>>
>> Thanks,
>> Ambi
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>
>
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