Mailing List Archive

On Fri, Jul 19, 2002 at 08:40:37AM -0400, Toal, Dave wrote:
> Good morning. I've got a question about substituting
> one netapp for another, by setting the ip addresses the same
> and changing the ethernet cable going to the switch from one
> to the other.

(hey, what about disks and data? :>)

Anyway, that should be enough.

> The netapp I'm trying to bring online is the 840. The
> ether (mac) addresses are showing different from inconfig, and
> I'm wondering if there's a way to set that explicitly; I don't
> see it from the options listed.

Why would you want to do that? If you unplug ethernet on the old
one, magic ARP will answer your calls.

Unless you have somewhere static ARPs; could be better to change
them instead.

p.

Brian,

Snapmirror and vol copy turned out not to be an option,
because the 760 is at 5.3.1; we're getting the 'volume is in
transitional state, aborting' error even though the destination
is offline. NDMP copy looks like the remaining method, the 760
is being upgraded to 6.2.1 and I want to duplicate the data before
starting that.


Piotr,

Yes, disks and data too. %-{)# What I saw from the first
attempt was no response to ping, on either side, even after doing
ifconfig down/up of the e9b nic. Maybe the magic arp has leaked
out the switch I was using? After connecting the original filer
I had to do arp -d and ping again, before it would respond to the
unix host mount request.





-----Original Message-----
From: Brian Long
To: Toal, Dave
Cc: 'toasters@mathworks.com'
Sent: 7/19/02 10:37 AM
Subject: Re: arp spoof, 840 with 6.2.1

Dave,

Are you replicating the data to the F840 or just moving shelves? If
you're replicating data with something like Snapmirror, you might
consider
the Ontap 6.X snapmirror migrate command. This alters the disk labels
on
the destination so you don't end up with stale NFS filehandles on all
the
clients (if you're using NFS). For CIFS, you don't need to worry about
this.

/Brian/

> Good morning. I've got a question about substituting
> one netapp for another, by setting the ip addresses the same
> and changing the ethernet cable going to the switch from one
> to the other.
>
> The netapp I'm trying to bring online is the 840. The
> ether (mac) addresses are showing different from inconfig, and
> I'm wondering if there's a way to set that explicitly; I don't
> see it from the options listed.
>
>
>
> the 840:
>
> netapp-demo*> ifconfig e9b
> e9b: flags=48043<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
> inet 206.33.27.85 netmask 0xffffffc0 broadcast 206.33.27.127
> ether 00:20:fc:1e:3a:75 (100tx-fd-down)
> netapp-demo*>
>
>
>
>
>
> the other netapp, a 760 running 5.3.6R1:
>
> wesson> ifconfig e0
> e0: flags=200043<UP,BROADCAST,RUNNING> mtu 1500
> inet 206.33.27.85 netmask 0xffffffc0 broadcast 206.33.27.127
> partner inet 206.33.27.86 (not in use)
> ether 00:a0:98:00:78:c5 (100tx-fd-up)
> wesson>
>
>
>
>
>
> --
> Dave Toal
> Thomson & Thomson
> North Quincy, MA
>
>
>

--
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On Fri, Jul 19, 2002 at 12:19:14PM -0400, Toal, Dave wrote:
> What I saw from the first
> attempt was no response to ping, on either side, even after doing
> ifconfig down/up of the e9b nic.

ARPs do timeout[1]. Make sure you delete ARPs both on hosts and
switches -- some of the beasts do ARP caching, which may either
be good or bad. Oh, make sure you (or your network manager) did
not make the network supersecure by entering static ARP entries
on switch ports.

p.

[1] I know, they should get overwritten with a new entry on the
switch.