Hi,
Is there a command or procedure to simluate a NIC failure?I want to
test whether the IPMP works if one of the Interface becomes faulty

I have tried pulling out the cable from switch,host,patch panel and I
can see IPMP failover successfull

Cheers
CG

On 2007-09-13, govindo@gmail.com <govindo@gmail.com> wrote:
> Hi,
> Is there a command or procedure to simluate a NIC failure?I want to
> test whether the IPMP works if one of the Interface becomes faulty

ifconfig foo0 down ?

--
That must be wonderful! I don't understand it at all.
-- Moliere

i think you could simulate by inserting a silly module to the stream,
assuming bge0 and bge1 are in the ipmp group you could do something
like
ifconfig bge0 modinsert ldterm@2
wait/check logs/ifconfig output, then
ifconfig bge0 modremove ldterm@2

redo using bge1 in place of bge0.

cable pulling is more fun though

On Sep 13, 5:32 pm, nelson.bens...@gmail.com wrote:
> cable pulling is more fun though

It is more fun, but the "official" way to do it is to use if_mpadm.
For example, to detach one interface:

/usr/sbin/if_mpadm -d *interface*

....will take it offline and you should see the rollover on the
console. The "-r" argument reattaches it to bring it back online.

Unfortunately it won't let you take both of them offline at the same
time, so to test clusters and whatnot, you must indeed pull cables to
test.

if_mpadm, hadn't seen that one. looks to be a better way. neato,
learning stuff on a friday an' all

On 2007-09-13, govindo@gmail.com <govindo@gmail.com> wrote:

> Is there a command or procedure to simluate a NIC failure?I want to
> test whether the IPMP works if one of the Interface becomes faulty
>
> I have tried pulling out the cable from switch,host,patch panel and I
> can see IPMP failover successfull

In addition to the previous methods, you could probably use ndd to create
incompatible negotiation parameters between the two devices (10hdx on one
side, 100fdx on the other for example).



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