Backup LAN Card(s) in case of multiple active LAN Cards connected to different HUBs

[Enrico Venturi]

Dear All,
in my system there are 8 configured LAN cards:
1st for IP, 2nd for heartbeat, 3rd for RETIX (proprietary protocol), 4th for RETIX, 5th for RETIX, 6th for backup, 7th for backup, 8th for backup.
Each IP / RETIX LAN Card is connected to a different HUB, so interfacing different networks (not connected); so, i cannot use only one backup lan card because it should be connected either to one HUB or to another one ...
My question is:
can I decide / configure which backup lan card protects an active lan card? i.e. can I configure a relation between active and backup lan cards?

thanks
Enric

[Christopher McCray_1]

Your backup lan card has to be on the same subnet as your cluster/packages. You can manually edit the cluster.conf file to specify a backup lan card for your ip card, but again, it must be on the same network.

Hope this helps
Chris

[Sanjay_6]

Hi Venturi,

I don't think there is any configuration parameter where you can specify the lan failover order. However the lan failover to the secondary will take place only if the secondary is active. I mean to say to say that the seconday should be connected to the network and active. I don't think there is any place in the packge conf file to specify the failover lan order, but i may be wrong.

You cannot have the secondary on the same subnet, because the ip address is not assigned to the secondary ane the seconday will take over the ip address of the failed lan card. So you can have multiple subnets on your system say 5 subnets and onlt one secondary. In case of the failure of one lan port of whichever subnet, the ip address of the failed lan port will bind to the seconday lan port.

Hope this helps.

Regds

[Christopher McCray_1]

What I meant to say was that the backup lan card needs to be attached to the same network as the lan card you wish to back up, which is how it is able to assume the information for the primary in case of failure.

Sorry about the confusion.

Chris

[Enrico Venturi]

Thanks a lot for your replies.
If I well understood:
* there are no mechanisms to establish an association between active lancard and backup lancard
* the backup lancard to recover the fault of an active one is chosen according to the configured subnet of the backup lancard, so ...
* if I need several backup lancards because I'm using several active cards connected to different subnetworks, then it's enough to connect properly the backup lancards to the subnetwors, i.e. the chosen backup lancard will be that one connected to the same subnetwork of the active fault.
Maybe my powerpoint slide can better explain my concepts.

Thans again!