Backup Exec 10d errors when trying to use secondary lan.

I am running Backup Exec 10d over a second physical network just for backups. It was working great untill recently. Now it will not backup over the backup lan. It will only backup over the primary network. I have reinstalled the remote agents and made sure that the clients are adverstising as it states on symantecs web site. Any hints on this one??
Final error: 0xe0000f02 - The media server could not connect to the remote computer. The remote computer may not exist on the selected subnet, but the option to use any available network route was not selected. Try selecting an alternative network interface, or allow Backup Exec to choose any available network interface. Final error category: Resource Errors
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Hedley PhillipsOwnerCommented:
Can you see the target server from the Media server? If you can, and can make selections from it in the backup job then it 'should' back it up.

I take it you can ping the remotes and connect to them via share drives ie C$

Also, try this:

Hedley PhillipsOwnerCommented:
and try here:

Don't know if this is the one you have already tried.

acpressAuthor Commented:
Thanks for the input but I already had done the solutions you suggested. Any more hints..I am clueless. Thanks
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Hedley PhillipsOwnerCommented:
Have you set it to:

"Use any available network interface" in Tools - Options - Network and Firewall

acpressAuthor Commented:
Yes that works, but I want use the secondary Lan since that is a separate lan just for the Backup system.
Hedley PhillipsOwnerCommented:

this secondary LAN, is this a completely seprate network on a different IP range on seperate switches or the same IP range but a different subnet mask on the same switch as the LAN?

Are you running this through a secondary NIC on the media and client servers?

What equipment do you have connecting the machines, switches, hubs etc.

This is a puzzle.
acpressAuthor Commented:
The secondary Lan is  separate lan using it's own switches and backup server. There is a second Nic in every system on a different subnet. Now here is the kicker. I was able to backup a system using the second lan...then 5 min. Later run the same backup and it fails....This backup did work for months. Now it won't. I am stumped. I even loasded Service Pack3 that Symantec has for  backup exec. Even reloaded the remote agents to the systems...No luck....
Hedley PhillipsOwnerCommented:
hurumph, this is puzzling. I take it nothing changed. Silly question I know.

Is DNS able to run on the backup LAN? Just wondering if BUE can see the machines properly.

If you go to dnsmgmt on your DC, you can see if the nameserver is listening on both the lan port and the backup port.

I take it you haven't added any routers into the backup lan? Just switches and clients etc.

Are you able to disable the LAN card on one of the servers and ping the media server name to see if you get a response.

You haven't changed any routing in your firewall that is stopping the media server from routing to the backup lan.

Starting to guess here.

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