Subject: RE: [ssm] Our ssm status

From: "Dave Thaler" <[email-masked]>
Date: Wed, 23 Jul 2003 10:27:29 -0700

Jon Zeeff writes:
> 2) Use of SSM here is held up by the lack of IP Router Alert
> option in IGMP packets from our Juniper router.  Apparently ]
> this causes Windows XP to ignore the packets.

Right.  This is per the IGMPv3 RFC, and hence should be true for
any IGMPv3 host, not just XP.  

Section 4 says: 
> Every IGMP message described in this document ...
> carries an IP Router Alert option [RFC-2113] in its IP header.

Section 9 says:
>  o Hosts SHOULD ignore v2 or v3 Queries without the Router-Alert
>    option.

-Dave

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