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To force backups via respective dedicated V-LAN.

Created: 11 Aug 2013 • Updated: 07 Oct 2013 | 8 comments
This issue has been solved. See solution.

Hello,

We have 1 master and 4 media server(including master which is also acting as media server).

   xlcnpde089- master/media
   xlcnpde090- media
   xlcnpde091- media
   xlcnpde092- media
 
There are 3 interfaces on each of these severs. One is production NIC and two are dedicated backup NIC(-bak & -baka).
Master and media servers
 
xlcnpde089.mags.com/10.207.80.10
Prod NIC (production interface)
xlcnpde090.mags.com/10.207.80.11
xlcnpde091.mags.com/10.207.80.12
xlcnpde092.mags.com/10.207.80.13
xlcnpde089-bak.mags.com/10.207.242.98
bak NIC (backup interface)
xlcnpde090-bak.mags.com/10.207.242.100
xlcnpde091-bak.mags.com/10.207.242.102
xlcnpde092-bak.mags.com/10.207.242.104
xlcnpde089-baka.mags.com/10.247.176.131
baka NIC (backup interface)
xlcnpde090-baka.mags.com/10.247.176.132
xlcnpde091-baka.mags.com/10.247.176.133
xlcnpde092-baka.mags.com/10.247.176.134
 
I have 2 client :
q-bak.mags.com/10.207.242.1
r-baka.mags.com/10.247.176.1
 
what should be the bp.conf entries and host entries on master, media & client in order to force  backups via respective dedicated V-LAN as per below technotes ??????????????????
 
 


  SERVER entries in bp.conf SERVER entries in host file
 xlcnpde089- master/media
? ? ?.... ? ? ?....
   xlcnpde090- media
? ? ?.... ? ? ?....
   xlcnpde091- media
? ? ?.... ? ? ?....
   xlcnpde092- media
? ? ?.... ? ? ?....
    q-bak ? ? ?.... ? ? ?....
     r-baka ? ? ?.... ? ? ?....
 
Regards,
Bharath
 
Operating Systems:

Comments 8 CommentsJump to latest comment

mph999's picture

You would use the PREFERRED_NETWORK settings, explained in the TN.

http://www.symantec.com/business/support/index?page=content&id=HOWTO60779

The TN gives plety of eamples, so should be fairly straightforware to work out.  The command can work either at an IP address leve, for network address level.

Easy to test, just use:

bptestbpcd -client <client name> from the media server to see the address the connection is made from (and to).

Martin

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Bharath Achar's picture

I agree preffred network

But please review this technote :

http://www.symantec.com/business/support/index?page=content&id=TECH54733

What should be the entries as per this note ???

Bharath

Nicolai's picture

A host internal routing tables takes affect before Netbackup PREFERRED_NETWORK kick into affect.

Understadnig internal routing is not difficutl but a lot of sysadmin get it wrong because the default gateway normal takes care of this. However if a host is multihomed - understanding static routes and internal routing is needed.

Per default - all network traffic will be sendt to the default gateway unless one of the  NIC is connected to the same VLAN as the destination host. You can only have ONE default gateway. 

Given the information above you should relative easy be able to see what interfaces the media server will contact q-bak.mags.com  r-baka.mags.com on.

See also : http://technet.microsoft.com/en-us/library/cc957855.aspx

Assumption is the mother of all mess ups.

If this post answered your'e qustion -  Please mark as a soloution.

mph999's picture

Nicolai makes a good point, static routes would fix this, and is probably the best solution.

A SERVER entry as per the TN won't control which interface is used, it only controls which servers are allowed to communcate with the client, so I think you will still need PREFERRED_INTERGFACE or static routes.

However, you might need to ''trick' NBU on the clients, depending on what name NBU uses for the media servers.

Eg.

xlcnpde092.mags.com/10.207.80.13 (prod)

xlcnpde092-bak.mags.com/10.207.242.104  (backup)

If you want to use the backup interface of media serever xlcnpde092, and the media server is listed as xlcnpde092-bak in nbemmcmd -listhosts then you would use SERVER = xlcnpde092-bak

If the media server is known as xlcnpde092 then you would need to use :

SERVER = xlcnpde092 but add an entry to the hosts file of the client :

10.207.242 xlcnpde092

So we list the non backup name of the media server (as that is what NBU knows the media server as ) but list the IP address of the backup interface.

Hopefully NIcolai will agre with this, it's been a while since I've had to do it.

Martin

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
SOLUTION
Nicolai's picture

The host file trick will work for smaller installation, but if you go really big it will kill the NBU admin slowly. 

For all client bp.conf I usually list all media server interfaces, also those I know will never connect for simplicity. One list to rule them all :-)

Client will never connect to media server by them self anyway, it always the media server that initiate the traffic to the client (NBU 5.1 and lower to taken into account).

For master servers I usually place the DNS name for the master server where traffic arrives first on the server list and then all the other master server interfaces and then finish off with media servers entries.

If the network is firewall free don't worry about stateful inspection. If firewall are passed do worry:

http://en.wikipedia.org/wiki/Stateful_firewall

Assumption is the mother of all mess ups.

If this post answered your'e qustion -  Please mark as a soloution.

mph999's picture

"The host file trick will work for smaller installation, but if you go really big it will kill the NBU admin slowly."

Ha ha ha ha ha ....

... and you should see what it does to Tech Support ....

(ps. I never said it was a GOOD idea ...;0)    )

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Marianne's picture

Similar discussion over here: 

https://www-secure.symantec.com/connect/forums/dedicated-backup-lan-configurations

Hope the examples in above thread helps....

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

RamNagalla's picture

at the time of master server installation and media server configuration how did you configure them..

master and media server entries should be defined based on the configuration.. if you have not done the master and media server configuration.. you alway have a privialge to choose any of the name... but i would prefer to go with Prod name for Master and media server cofigurations and let the clinets to communicate with Backup Vlan.



Server  SERVER entries in bp.conf SERVER entries in host file
 xlcnpde089- master/media
entires depends on how you registre the master and media servers at the time of installation  ? ? ?....
   xlcnpde090- media
entires depends on how you registre the master and media servers at the time of installation  ? ? ?....
   xlcnpde091- media
entires depends on how you registre the master and media servers at the time of installation  ? ? ?....
   xlcnpde092- media
entires depends on how you registre the master and media servers at the time of installation  ? ? ?....
    q-bak
xlcnpde089-bak.mags.com
10.207.242.98 xlcnpde089-bak.mags.com
 
xlcnpde090-bak.mags.com
10.207.242.100 xlcnpde090-bak.mags.com
 
xlcnpde091-bak.mags.com
10.207.242.102 xlcnpde091-bak.mags.com
 
xlcnpde092-bak.mags.com
10.207.242.104 xlcnpde092-bak.mags.com
     r-baka
xlcnpde089-baka.mags.com
10.247.176.131 xlcnpde089-baka.mags.com
 
xlcnpde090-baka.mags.com
10.247.176.132 xlcnpde090-baka.mags.com
 
xlcnpde091-baka.mags.com
10.247.176.133 xlcnpde091-baka.mags.com
 
xlcnpde092-baka.mags.com
10.247.176.134 xlcnpde092-baka.mags.com