Lan card backup

[Enrico Venturi]

Hello everybody,
is there any commands to know which lan cards are protected by the lan card backup feature_
I try to better explain myself: my MC/SG system has 4 lan cards, one of them is not configured, so it acts as backup lan card.
Of course, the 3 configured lan cards belongs to 3 different subnetworks, SN1, SN2 and SN3.
A read that when a fault occurs MC/SG configures properly the spare lan card according to the capability to replace it, in other words if by the lan card spare is possible to reach all the nodes of the subnetwork which the fault lan card belongs to. May be the 3 lan cards are connected to different HUBS .. are there any commands to know if the lan cards are physically connected (even if they are on different subnetworks)? I need it in order to know in advance if connecting the lan card spare to one hub I can protect all the lan cards or only those ones connected to the same hub.

Enrico

[Duncan Edmonstone · Accepted solution]

You are correct in that MCSG will fail-over the IP address from any card that fails if there is a physical link between the two cards at link level (i.e. the hubs are bridged). Use linkloop to figure out which NICs can communictae to others at link level.

First of all use lanscan to get a list of MAC addresses for your server, together with the PPA number (NMID if you are on 10.20). Then use linkloop to test link connectivity from the unused LAN card to the other LAN cards:

linkloop -i 0x

If this returns OK, then there is a suitable link between the two cards such that MCSG would fail-over the IP address on that card to the standby if the primary failed.

HTH

Duncan

[Johannes Seippel]

try cmscancl