Fail over configuration.

[binil]

Hi,

I have the system rp5470 running on HPUX11i. Which is having
1) 2x 1Gb ethernet cards
2) 2x 2Gb Fibre Channel Cards.

I need to configure the fail over for the ethernet cards. Is there a way to configure this with out installing the Cluster s/w (MC/SGD). If so plsease tell me how..

A tape Library MSL5060 is connected to this server through Router M2402 .The connection is such away that,2 no. fibre channel cables are connected from server to this Router, and using 2 SCSI port output to conncet to the MSL5060 (having 4 LTO).
I need to configure the Fail over for the fibre channels also. How we can configure this?

NB: Using dataprotector 5.1 for backup

Pls give your valuable reply..
Thanks
Binil.P.Narayanan

[Sunil Sharma_1]

Hi,

I Think you have 1 Ethernet card(1Gb) and 2 Fiber HBA( Host Bust Adapter) for configuring fail over on Ethernet card you requir 2 Ethernet card and HP APA( Auto Port Aggergation) s/w. this is price product and you can contact your HP representive for same.

HBA's fail over for Tape drives i am not sure.

Sunil

[binil]

Hi Sunil,
Thanks for the immediate reply.
Please note that I have mentioned there are two ethernet cards. Also I would like to know is there any default/free utility to do the same.

Thaks
Binil

[Krishna Prasad]

You will have to purchase MC/Service Guard or APA.

Service Guard has lan standby functionality to failover.

APA gives you the ability to bind the two cards to one IP address or configure it as a lan standby.

If there is anything free out there it would be something the free software foundation produced for Linux and ported to HP-UX.

[binil]

Hi Ron,
Thanks for the reply.
Could you have a look in to the second problem-The fibre channel fail over for Tape Library.

Thanks in advance
Binil

[Krishna Prasad]

I am not exactly sure of your config for the DLT's but here is guess on my part.

You have your host connected to a DLT via scsi cables?

Do you have two hosts? or one?

If you have two hosts you can run SCSI to the Library from both machines. If you have only have one host - I don't think you can have a true failover. However, since you do have two SCSI connections and four LTO devices - you can simply change you backup device if one fails. You would have to do this manually.

Either way one host or two if any of the devices or SCSI connect to the libarary fails you will have to manually change your backup device.

I don't think you had any question of the Fibre connections?

[Sunil Sharma_1]

Hi Binil,

There is no free utility ti achieve this in HP UX. APA is priced product.

Sunil

[Bernhard Mueller]

Binil,

as for the network, you already know that there is APA. If you do not want to spend any money you can go and write a script that checks your network connectivity and if the current lan fails you take it down and bring the other card up with the same IP etc.

A few hints: - ping the broadcast address a defined # of times, excluded your own IP.
- No replies then you take the card down.
- You *may* want to change netconf and bring the ohter card up with net start, or just using ifconfig and route commands.

As for the failover of the LTOs I understand that you have both FC connections to the 2 FC cards of your server. Then I think you should see 8 tape drives in ioscan (or is it only two drives for each FC connection?) then you see 4. Anyway, you would solely use DP to provide redundancy. I.e. you would make your backup specification in a way that it *could* use all drives but uses only one (or two, or four), then DP locks the first (two), and if available backup starts, if not DP locks the next drive(s). There is a "lock name" in DP you should set appropriately if you have differnet HW paths (devices files) for the same drive.

HTH

Regards,
Bernhard