backup lan in netbackup

[Hanry Zhou]

I have two lan cards on a hpux box. The primary one is called "xyz.abc.com", and 2ndary one called "xyzbk.abc.com"

I want to have all backup packets go through secondary card, and not primary lan card. However, all packets seem to go primary one only, not as I expected.

I configured the name of the box "xyzbk.abc.com" as the client name on the netbackup sever when I create the schedule.

nslookup on both client and server seem to be working fine.

What else I need to check? and what I can do to have netbackup go through secondary card.

[doug mielke]

You need to do this through IP addressing, and put them on separate segments. Even in a level 3 switched environment.
Then config the backup on the alternate addressing segment.

[Michael Steele_2]

This may be a router issue. Some routers will always route traffic into the primary ip address.

Load balancing two NIC's is tricky and probably better if you separate the NIC's by two subnets.

However, several users have tried and their succusses have varied. Most are using two default rounters in some manner, or static routes in netconf.

You can use two default gateways in your netconf file, one for each lan, but only the first entered into the routing table will typically be used.

So it's best to have the NIC with the most load assigned to the default gateway.

I've also read where using the "...ip_strong_es_model ..." ndd parameter will allow dual default routers, but the results from users who've implemented this parameter appear inconsistent, based upon the manufacturer of the router and its configuration. Using proxy ARP on the router for instance.

To check ip_strong_es_model current setting use:

ndd -get /dev/ip ip_strong_es_model

To actually set it use:

ndd -set /dev/ip ip_strong_es_model 1

Here is one link about 2 nics being implemented:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x2cba3a7b3682d611abdb0090277a778c,00.html

Here is another:

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=6aa57e860890b36f79/screen=ckiDisplayDocument?docId=500000000092418

[Steven E. Protter]

netbackup will back up through any network card you configure the client to back up through.

You don't back up packets, you back up data btw.

On an HP-UX server, you can not have two NIC cards configured to the same network and subnet. This will cause you to be unable to networkt he box at all.

Here is a primer on the subject:

IP is 192.168.0.20
Netmask is 255.255.255.0

The network is 192.168.0
The host is 20

You can't have any other cards on the 192.168.0 network. Won't work.

Next note: For netbackup to work right your HP box must have a valid /etc/hosts file with loopback and a valid entry for the server itself. It does not matter what nsswitch.conf says. For some reason, you need a valid nsswitch.conf file for Veritas to ignore.

Lastly I advise you with regards to point assignment. You will get more answers faster if you take the time to assign points to answers.

The point system is how we evaluate the quality of the answers we give you. If you don't give us feedback we can't improve ourselves.

SEP

[Hanry Zhou]

I'm sorry, but one correction:
these two lan cards do located on different segment: xyz.abc.10.com and xyzbk1.abc.20.com.

[Tom Danzig]

Edit the /usr/openv/netbackup.bp.conf and put the hostname of the segment you want to use first. NB should use the first SERVER= entry in the list if multiple entries exist.

[Billy_24]

Try adding REQUIRED_INTERFACE = xyzbk to bp.conf on the client.

Also, from the client, run bpclntcmd -self to verify client is setup correctly, and bpclntcmd -pn and you should get a response from the master server with:

fqdn of client - client name - ip address

If client name is correct, but the ip address is the wrong interface, then you may need to look at dns or hosts entries on the master.

[Tim Adamson_1]

Hi Harry,

The reason for the backups going through the primary lan card is that you have probably defined your Media Server via the primary lan card. Can you redefine it using the IP Address of the lan interface you want to use?

If your Media Server is also your Master Server, how difficult is it to redefine it again?


Tim.