All things related to multicast

[Hans Kuhn <>]

That fixed it. I turned of igmp snooping on my HP switch and
all is well. Thanks.

-- 
Hans Kuhn, Academic User Services            office (541) 346-1714
University of Oregon, 237 CC                 fax    (541) 346-4397

Key fingerprint =  1E BC 32 03 AC E9 82 6C  44 4A CD 63 BB 2D 51 89

On Fri, 14 Jun 2002, Toerless Eckert wrote:

:    On Fri, Jun 14, 2002 at 02:26:55PM -0700, Hans Kuhn wrote:
:    > Why yes. I have cisco a 7200 with igmpv3, and an HP switch
:    > with snooping between the XP host and the cisco 7200.
:    
:    You sure that HP switch supports IGMPv3 ? If it does not then it would
:    simply flood unrecognized IGMP messages (like the IGMPv3 membership 
:    reports) but because it doesn't recognize them, it wouldn't establish
:    forwarding, so even though everything looks correct on router and host,
:    the switch would block the traffic.
:    
:    If in doubt, simply switch off IGMP Snooping. It's not as if the little
:    bit of multicast would hurt any current PC - it's really only an issue
:    if you still have 10Mbps segments or really old hosts.
:    
:    Cheers
:       Toerless
:    
:    > -- 
:    > Hans Kuhn, Academic User Services             office (541) 346-1714
:    > University of Oregon, 237 CC                  fax    (541) 346-4397
:    > 
:    > Key fingerprint =  1E BC 32 03 AC E9 82 6C  44 4A CD 63 BB 2D 51 89
:    > 
:    > On Fri, 14 Jun 2002, Toerless Eckert wrote:
:    > 
:    > :    Hans, do you by any chance have IGMPv3 enabled on your routers
:    > :    ("ip igmp version 3" if running a Cisco ), but also have some
:    > :    IGMP Snooping or CGMP switched between the router and you ?
:    > :    
:    > :    Cheers
:    > :        Toerless
:    > :    
:    > :    On Fri, Jun 14, 2002 at 11:50:09AM -0700, Hans Kuhn wrote:
:    > :    > 
:    > :    > Is anyone out there having problems with multicast
:    > :    > applications running under Windows XP pro? At first when I
:    > :    > started working with XP, I thought the applications were to
:    > :    > blame, but after visiting Marshall's multicast tester and
:    > :    > discovering that I was told I'm not multicast-enabled, 
:    > :    > 
:    > :    > At this point I am pretty sure XP is the problem. I know of
:    > :    > people on my campus who are successfully using IP/TV 3.4beta
:    > :    > with XP, but both machines I've installed XP on don't
:    > :    > work. This would point to a network configuration issue, but
:    > :    > I haven't the foggiest what might be wrong. I have tried
:    > :    > enabling and disabling the built-in firewall and the QOS
:    > :    > shim, but neither affects the problem. Ideas?
:    > :    > 
:    > :    > Hans
:    > :    > 
:    > :    > -- 
:    > :    > Hans Kuhn, Academic User Services      office (541) 346-1714
:    > :    > University of Oregon, 237 CC                   fax    (541) 
346-4397
:    > :    > 
:    > :    > Key fingerprint =  1E BC 32 03 AC E9 82 6C  44 4A CD 63 BB 2D 
51 89
:    > :    
: