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Multicast and Error 530


ljsklar

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Over the past several weeks, we have been unable to back up Win clients using Multicast. We get a -530 error when we try. We can see the clients listed and select them, but if we try to refresh or go to the Tools screen, we get the error. When we switch to Direct connection, everything works fine. But, since these are mainly laptops in a DCHP environment, the usefulness of doing it this way is limited. I have checked with our networking folks & they can't see a problem, and I have tried disabling firewalls without success.

 

We are using Retro Multi-Server 7.6.123 & have tried with both 7.5 & 7.6 clients.

 

Any ideas?

 

Larry Sklar

Northwestern Univ. ORIS

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Have you tried the freeware ethereal (now wireshark) to grab some packets and see what is happening to the port 497 packets ? Perhaps something changed in your network infrastructure to block those packets. What happens if the clients are on the same network segment as the Retrospect server? See:

Retrospect multicast

Multicast

Retrospect use of multicast and broadcast

 

Really sounds like something isn't passing multicast and/or broadcast packets.

 

Another possibility is to use DHCP static maps (assign DHCP leases based on MAC address) for those laptops, so that they always get the same IP rather than from a dynamic scope pool. Doing that also makes management a bit easier because, then, you can add reverse DNS PTR records for those IP addresses and easily see what laptops are connected at a given time (because each laptop always gets the same IP).

 

Just a suggestion.

 

Russ

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