All things related to multicast

[Tony Rimovsky <>]

It is working for me:
/usr/local/jdk/bin/java Beacon -group 233.2.171.1 -port 56464 -server 
beaconserver.accessgrid.org -serverport 9997 -name tony-test -ttl 127

09:56:44.429725 farmer.ncsa.uiuc.edu > beacon-mcast.accessgrid.org: 
farmer.ncsa.uiuc.edu > beacon-mcast.accessgrid.org: igmp v2 report 
beacon-mcast.accessgrid.org [ttl 1] (id 7385, bad cksum 0!, optlen=4 RA)
09:56:44.577408 farmer.ncsa.uiuc.edu.4771 > 
beacon-mcast.accessgrid.org.56464:  udp 57 (ttl 127, id 7396, bad cksum 0!)

What OS and jvm are you using?


On Wed, Aug 21, 2002 at 09:45:01AM -0500, Michael Hare wrote:
> Sorry if it's off topic but..
> 
> Anyone have issues with the multicast beacon client not respecting TTL on 
> outbound packets?  According to the docs, I believe there should be a 
> default TTL of 127.  This doesn't seem to be the case, and using -ttl 127 
> on the command line didn't help either.
> 
> Redhat 7.3
> 
> cd /usr/local/beaconclient; /usr/java/bin/java Beacon -group 233.2.171.1 
> -port 56464 -server beaconserver.accessgrid.org  -serverport 9997 -name 
> WiscNet_Madison -ttl 127
> 
> 09:43:55.229320 farnsworth.wiscnet.net.32883 > 
> beacon-mcast.accessgrid.org.56464:  udp 69 (DF) [ttl 1]
> 09:43:55.339329 farnsworth.wiscnet.net.32883 > 
> beacon-mcast.accessgrid.org.56464:  udp 69 (DF) [ttl 1]
> 09:43:55.449321 farnsworth.wiscnet.net.32883 > 
> beacon-mcast.accessgrid.org.56464:  udp 69 (DF) [ttl 1]
> 09:43:55.559329 farnsworth.wiscnet.net.32883 > 
> beacon-mcast.accessgrid.org.56464:  udp 69 (DF) [ttl 1]
> 
> -Michael
> 
> /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
> Michael Hare
> UW-Madison/WiscNet Network Engineering
> My phone: 608-262-5236
> 24-Hour NOC: 608-263-4188
> WiscNet: 608-265-6761