r3909 Posted July 14, 2003 Report Share Posted July 14, 2003 Cisco 2514 - router / Windows 2000 / Retrospect 6.0 The dantz faq's and several posts imply I should be able to mulitcast through a router without enabling IGMP. Opinions? Link to comment Share on other sites More sharing options...
Mayoff Posted July 14, 2003 Report Share Posted July 14, 2003 If you want to go across the router you have three choices. 1) Change the Multicast Time to Live in Retrospect, which requires IGMP 2) Use subnet broadcast which will look for clients in a subnet you have specified. This does not use IGMP. 3) Type in the direct IP address of the client and Retrospect will look at just that IP. Link to comment Share on other sites More sharing options...
r3909 Posted July 15, 2003 Author Report Share Posted July 15, 2003 Quote: Mayoff said: If you want to go across the router you have three choices. 1) Change the Multicast Time to Live in Retrospect, which requires IGMP 2) Use subnet broadcast which will look for clients in a subnet you have specified. This does not use IGMP. does the client also broadcast to "255" or does it respond to the retrospect server's broadcast? also when is port 497 used during this process? 3) Type in the direct IP address of the client and Retrospect will look at just that IP. Link to comment Share on other sites More sharing options...
Mayoff Posted July 15, 2003 Report Share Posted July 15, 2003 Port 497 is used for UDP and TCP for Multicast and subnet broadcast. The following may also be helpful: http://www.dantz.com/index.php3?SCREEN=kbase&ACTION=KBASE&id=27474 Link to comment Share on other sites More sharing options...
r3909 Posted July 15, 2003 Author Report Share Posted July 15, 2003 Thanks for the info. The info helped but also did not answer the following: Does the retrospect client "continually" broadcast it's existence on port 497 or does it only respond to a subnet broadcast via port 497 from a retrospect server? Link to comment Share on other sites More sharing options...
Mayoff Posted July 15, 2003 Report Share Posted July 15, 2003 The client does not send out a broadcast. It can only respond to a request from the Retrospect server. Although the client does identify itself to the network when the service starts. Link to comment Share on other sites More sharing options...
Guest psykoyiko Posted July 17, 2003 Report Share Posted July 17, 2003 Quote: dance said: Thanks for the info. The info helped but also did not answer the following: Does the retrospect client "continually" broadcast it's existence on port 497 or does it only respond to a subnet broadcast via port 497 from a retrospect server? The application is the one that sends out subnet broadcast (if configured to do so). It will broadcast to the subnet address, and any client nodes on that subnet will respond to the server application. So, to configure your router properly, you can either a) enable IGMP routing (and use multicast in Retrospect, changing the TTL to however many router hops there are) enable broadcast access to the subnet behind the router, on port 497. Link to comment Share on other sites More sharing options...
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