X-Sylpheed-Account-Id:1
S:andy.sharp@onstor.com
SCF:#mh/Mailbox/sent
X-Sylpheed-Sign:0
X-Sylpheed-Encrypt:0
X-Sylpheed-Privacy-System:
RMID:#imap/andys@onstor.net@onstor-exch02.onstor.net/INBOX	0	BB375AF679D4A34E9CA8DFA650E2B04E0B4744BD@onstor-exch02.onstor.net
X-Sylpheed-End-Special-Headers: 1
Date: Fri, 15 Aug 2008 15:42:30 -0700
From: Andrew Sharp <andy.sharp@onstor.com>
To: "Andy Pinkard" <andy.pinkard@onstor.com>
Cc: "dl-cstech" <dl-cstech@onstor.com>
Subject: Re: ARP flush , bobcat -> cougar
Message-ID: <20080815154230.28ff2502@ripper.onstor.net>
References: <BB375AF679D4A34E9CA8DFA650E2B04E0B4744BD@onstor-exch02.onstor.net>
Organization: Onstor
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

Flushing our own arp caches/tables is of course completely within our
control.  There is no "command" to tell other devices on your local
subnet to flush their caches, but there is something called a
gratuitous arp, which I believe we do send out, I'm pretty sure, when
we move a vsvr. This has the desired effect in that case.

For a migration, this does not play a part.  An arp will be broadcast
when we enable the lport interfaces at boot time.  I suspect that the
act of upgrading their Bobcat to 3.3 will require NFS clients to
reconnect (because of the bump in the filesystem version), so a
customer might want to do the migration immediately after upgrading the
Bobcat to 3.3 without bringing the clients on line so that they don't
have to reconnect the clients twice.

CIFS clients will have to reconnect in any case.


On Fri, 15 Aug 2008 07:24:52 -0700 "Andy Pinkard"
<andy.pinkard@onstor.com> wrote:

> This is really general question:-
> 
>  
> 
> When a VSVR move ( explicit or implicit) occurs then we will issue an
> arp flush to the local N/W I/Fs.
> 
>  
> 
> Is there a command to issue an explicit arp flush onto the N/W ? (i..e
> not just flush the Filer's arpcache)
> 
>  
> 
> The BobcatToCougar Transition guide raises the a potential issue in
> its troubleshooting section. So an ability to stimulate an arp flush
> N/W sequence would be handy.
> 
>  
> 
> Andy
> 
>  
> 
>  
> 
