IGMP V2 (RFC2236) clarification
Theodoros Kallimanis <[email protected]> Tue, 14 Oct 2003 11:41:48 +0300
| Newsgroups | gmane.ietf.idmr |
|---|---|
| Message-ID | <[email protected]> |
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Hello,
I will appreciate a lot if you can clarify a point in IGMP V2 RFC 2236. =
In the protocol description (ch. 3) the following phrase is mentioned:
" When a host joins a multicast group, it should immediately transmit an =
unsolicited Version 2 Membership Report for that group, in case it is =
the first member of that group on the network"
The phrase refers actually to the original join of the group by a =
non-memebr host. The undelined part of the phrase is the part where I =
need a clarification. How the "non-member" host can identify that it is =
the first member of the group? At the state machine diagram at chapter 6 =
/ page 10, no reception of "join group" is shown at Non-Member state. =
The text at chapter 3 indicates that the Membership Report is sent =
immediately, so it is assumed that no response delay exists in the case =
of the initial membership reports sending. Can you clarify please if =
this is a valid point on the RFC and if it is how this is supposed to be =
realized?
Best Regards and thanks in advance for the assistance
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Theodoros Kallimanis
Systems and SW engineer
INTRACOM SA
Dept "Access & Transmission"
tel : +30-210-6671961
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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<DIV><FONT size=3D2>Hello,</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>I will appreciate a lot if you can clarify a point =
in IGMP V2=20
RFC 2236. In the protocol description (ch. 3) the following phrase is=20
mentioned:</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><STRONG><EM><FONT size=3D2>" When a host joins a multicast group, =
it should=20
immediately transmit an unsolicited Version 2 Membership Report for that =
group,=20
<U>in case it is the first member of that group on the=20
network</U>"</FONT></EM></STRONG></DIV>
<DIV><STRONG><EM><FONT size=3D2></FONT></EM></STRONG> </DIV>
<DIV><FONT size=3D2>The phrase refers actually to the original join of =
the group=20
by a non-memebr host. The undelined part of the phrase is the part where =
I need=20
a clarification. How the "non-member" host can identify that it is the =
first=20
member of the group? At the state machine diagram at chapter 6 / =
page 10,=20
no reception of "join group" is shown at Non-Member state. The text at =
chapter 3=20
indicates that the Membership Report is sent immediately, so it is =
assumed that=20
no response delay exists in the case of the initial membership reports =
sending.=20
Can you clarify please if this is a valid point on the RFC and if it is =
how this=20
is supposed to be realized?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Best Regards and thanks in advance for the=20
assistance</FONT></DIV>
<DIV><FONT =
size=3D2>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<BR> =20
Theodoros Kallimanis<BR> Systems and SW=20
engineer<BR> INTRACOM =
SA<BR> =20
Dept "Access & Transmission"<BR> tel :=20
+30-210-6671961<BR>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</FONT> </DIV></BODY></HTM=
L>
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