Number of NICs for 2 Node Serviceguard

[Basheer_2]

Hello

HP-UX 11.11
RP4440, 8GB

Is this is a good NIC recommendation for 2-Node Serviceguard cluster

1) 1-Port - Data ( Primary)

2) 2-Port - 1 For Heartbeat (Pri)
- 1 For Backup-Agent

3) 2-Port - 1 For Data/Heartbeat (Secondary)
- 1 Spare

[Josiah Henline]

That will work and provide good redundancy.

Make sure that the primary and stand-by lans go to different switches. That applies to both nodes.

[Josiah Henline]

Don't forget that you can also set your backup NIC to fail to a stand-by. That way if there is a lan failure, there will be less urgency because the backup will still complete.

[BPatrick]

Basheer,
Its not a good idea to share Data and heartbeat. You could use seperate ports for the heartbeat and data


Regards
Patrick

[Jeff Schussele]

I agree with Patrick.
Heartbeats, ideally, should be on "private" subnets.
Nothing will ruin your day more than an overloaded subnet that causes a missed heartbeat to deduce that the network is down & TOC your box.

My 2 cents,
Jeff

[Basheer_2]

Thanks Patrick and Jeff
I already have a Primary heartbeat on one NIC

1) 1-Port - Data ( Primary)

2) 2-Port - 1 For Heartbeat (Primary)
- 1 For Backup-Agent

3) 2-Port - 1 For Data/Heartbeat (Secondary)
- 1 Spare

[BPatrick]

Basheer,

Since you have a spare port its a good idea to seperate your heartbeat and data.

Patrick

[Mridul Shrivastava]

I would suggets you to have different cards for data and heartbeat purpose. Otherwise sometimes because of excess data flow heartbeat misses and one of the node may TOC.

[Basheer_2]

Thanks

I already have

1 NIC for Primary - Heartbeat
1 NIC for Data/Heartbeat ( Secondary)

[Stephen Doud]

I don't see a problem with putting HB on multiple NICs.... it insures redundancy - which is the name of the game.
It's best to have a dedicated HB LAN, but if you need the NICs for data transfer, then make all of them allow HB traffic. Serviceguard allows for up to 7 HB-carrying LANs.

[Sp4admin]

The I thinks it goes is as follows. you can use the Core-LAN with a cross-over cable. You will need to beable to ping the servers on the cross-over. configure it using SAM.

1. primary IP (HB)
2. scondary (HB)
3. Hartbeat cross-over cable (core -lan)



$0.02
Sp4admin

[freddy_21]

MCSG need 3 port:
1. for Data primary ( production IP )
2. for standby ( no IP just failed over port when your data primary failed)
3. for heartbeat ( to check that pair still alive )

To make redundant for heartbeat, usually we use data (primary) port as heartbeat (secondary).

remember please seperate network card for data primary port and heartbeat primary. It will be single point of failure.