Re: IP layer and layer 2 IGMP Snooping

On Jun 11, 8:14 pm, Albert Manfredi <bert22...@xxxxxxxxxxx> wrote:
On Jun 11, 2:55 am, vicky <vikrant.pan...@xxxxxxxxx> wrote:





One more thing i want to ask

Is the Multicast IP to mac resolution   is done at host pc's end also.
to make a multicast MAC address

For exp
if multicast ip address is

227.2.3.7

then its mac address

01-00-5e-02-03-07

is made at host pc end , as then it send packet by setting this mac
address to the DA field.

In transmission, and in reception. Yes. As explained in RFC 1112.

Bert- Hide quoted text -

- Show quoted text -

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My new query is related to registration in a mulicasting group so for
i m taking a case

For exp

let 's say there are 10 pc's (hosts)
one multicasting router
a layer 2 switch (IGMP Snooping capable) is in between the hosts and router
out of 10 hosts 5 will register in a multicasting group and another will register in another multicasting group
but there each registration time is not same (one sent membership request at one time another send its group
registration in an another time)
Now what the data to be multicast (by router) is at time (let at 2 pm)

so registration for different multicast group is sent by hosts is some
before

So my question is if by one host the registration is sent some hours
before as well as by anther one is few minutes before the fix time of
multicast data is flow by router , so how the layer 2 switch manages
there (hosts) table ?

Vikrant
.

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