[OpenAFS] networking thought/question

[Nathan Ward]

I have a similar thing, with gig-e fibre.
I use linux, but hey.

I have (fs1)10.0.1.1/24 and (fs2)10.0.1.2/24 as the fileserver IP's 
(available to the rest of the network), and (fs1)10.0.0.1/30 and 
(fs2)10.0.0.2/30 available over the inter-server link.
I add a router to (fs1)10.0.1.1 over (fs1)10.0.0.1 and a route to 
(fs2)10.0.1.2 over (fs2)10.0.0.2.

It seems to work for me.
My client machines occasionally complain that they can't get to the fs's 
on 10.0.0.1 and 10.0.0.2, this could be resolved by adding routes to 
10.0.0.1 over 10.0.1.1 and to 10.0.0.2 over 10.0.1.2.

This would also work without adding the extra routes on the servers, by 
putting the IP addresses for the other file server into the hosts file. 
IE fs1:/etc/hosts has an entry for fs2 at 10.0.0.2, and vice versa. I think.

Nathan Ward

Tim C. wrote:

>  For the sake of this email, I'll simplify our afs network.  Say I've
>got two afs file servers which are Sun Netra boxes(which have two
>network interfaces), and one of these is contains readwrite and
>readonly, and the other server contains readonly copies of all the stuff
>on the first server.
>  For the visually/technically minded folks, here's a vos examine of a
>volume modified to explain:
>
>root.cell                         # RW         24 K  On-line
>    fs1.afs /vicepa
>*blah blah blah*
>    number of sites -> 3
>       server fs1.afs partition /vicepa RW Site
>       server fs1.afs partition /vicepa RO Site
>       server fs2.afs partition /vicepa RO Site
>
>
>  Okay, so both the servers(fs1 and fs2) have their primary interface to
>use, and ifconfiged as fs1 and fs2 appropriately.
>
></end description>
>
>  What I was thinking was that when you're moving volumes around, and
>releasing them, it's using a bit of network traffic over the public
>interface that seems like a waste.  So what I'd like to do is setup a
>private network using the second interfaces of all the fileservers(fs1
>and fs2) to be used for inter-fileserver communication.
>
>  So what has to happen is when I release root.cell in the above
>example, it says okay, I'm fs1, and I need to dump to fs2, so I used the
>second interface to get to it.
>
>  Now my first though is that it's really simple and I just need to
>setup a private network, say 192.168.1.0, and then have a route setup
>like: route add default fs2 -interface gateway hme1
>
>
>  So does anyone see anything "bad" with this, have any better
>suggestions, or otherwise have any comments?
>
>Thanks,
>  Tim
>
>-----------------------------------------------------------------------
>Tim Craig            These are my opinions and not my employers. :)
>OIT-Systems
>tim@umbc.edu         It's hard to be serious when you're
>                       naked. - Garfield
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