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Re: Multicast on Switches posted 08/06/2006
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alright thanks a lot i got it.

Tc
Aamir


On 8/6/06, nikolai <niko@xxxxxxxxx> wrote:
>
>
> http://www.cisco.com/en/US/customer/products/hw/switches/ps628/products_configuration_guide_chapter09186a008007e8d9.html
>
> "Internet Group Management Protocol (IGMP) snooping constrains the
> flooding of multicast traffic by dynamically configuring the interfaces
> so that multicast traffic is forwarded only to those interfaces
> associated with IP multicast devices."
>
> "Catalyst 2950 switches support a maximum of 255 IP multicast groups and
> support both IGMP version 1 and IGMP version 2. By default, IGMP
> snooping is globally enabled on the switch. By default, IGMP snooping is
> enabled on all VLANs, but it can be enabled and disabled on a per-VLAN
> basis."
>
> Use "show ip igmp snooping [vlan vlan-id]" to verify...
>
> -- nikolai
>
> Aamir Aziz wrote:
> > One thing i forgot to mention is that its a flat network, no vlans,
> anyway
> > your saying that if it was a 3550 then it would not need any
> configuration,
> > how is that?
> >
> > Thanks
> > Aamir
> >
> >
> > On 8/5/06, nikolai <niko@xxxxxxxxx> wrote:
> >> I would consider IGMP SNOOPING, assuming that the network is strictly
> L2
> >> (VLAN shared between the switches). 3550/3560/3750 have IGMP snooping
> >> enabled by default, since it is done on a hardware level. You might
> need
> >> to enable it on 2950.
> >>
> >> Here are some useful "sh" commands:
> >>
> >> *********************************************************
> >> CAT2#sh ip igmp snooping groups
> >> Vlan      Group          Version     Port List
> >> ---------------------------------------------------------
> >> 1         224.0.1.40     v2          Fa0/5
> >> 1         231.231.231.231v2          Fa0/5
> >> **********************************************************
> >> CAT2#sh mac-address-table multicast igmp-snooping
> >> Vlan    Mac Address       Type       Ports
> >> ----    -----------       ----       -----
> >>    1    0100.5e00.0128    IGMP       Fa0/3, Fa0/5
> >>    1    0100.5e67.e7e7    IGMP       Fa0/3, Fa0/5
> >> **********************************************************
> >>
> >> -- nikolai
> >>
> >>
> >> Aamir Aziz wrote:
> >>> Hi there ppl,
> >>>
> >>> I have a question, two switches Sw1 and Sw2 (both 2950), on Sw1 i have
> a
> >>> server running multicast application sending a stream to a client on
> >> Sw2,
> >>> the requirement is that multicast packets should only be sent and
> >> received
> >>> between the server on Sw1 and client on Sw2 so will the following
> >>> configuration be enough:
> >>>
> >>> Sw1:
> >>> Ip multicast-routing
> >>>  int fa0/1
> >>>  no switchport
> >>>  ip pim dense-mode
> >>>
> >>> Sw2:
> >>>  Ip multicast-routing
> >>>  int fa0/1
> >>>  no switchport
> >>>  ip pim dense-mode
> >>>
> >>> Do i need to put an IP on the interfaces or not?
> >>>
> >>> thanks
> >>> Aamir
> >>>
> >>>
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