Ascend Archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: (ASCEND) (PIPELINE) What is wrong
On Fri, Nov 21, 1997 at 11:58:36AM +0100, Dr. Wolfgang Beneicke wrote:
> Hi Rob,
>
> I suspect a configuration problem with your networks.
>
> You write you're using
>
> remote network: 208.205.255.154/30, i.e. 152...155
> office network: 208.205.255.41/24, i.e. 0...255
>
> sure, 2 IPs from each IP range cannot be used for hosts (.152 and .155 /
> .0 and .255).
Indeed.
> So your remote network is in fact _part of the office network_.
> I'd guess the office router will try to reach the remote hosts on his
> _local_ ethernet, and will not even try to dial out.
But only as long as proxy ARP is not enabled. Ascend gear can cut out
whole subnets, not only single IPs, very nicely from a larger net. In
fact we've used this a couple of times and it gave us the chance to avoid
the silly subnetting of a /24.
Be sure to use Proxy Mode=Always, as the above requires this if the office
router should also call out. If not use Proxy Mode=Active.
> BTW, while changing your IPs :-), I'd avoid a "255" octet in a valid IP.
> There are dim memories in the back of my brain that a valid IP may not
> contain all 1's. I'd be cautious here.
But then we are living in '97 not '85 where (from todays viewpoint)
braindead RFC 950 subnetting hit us badly. With the '87 advent of
VLSM this should have vaporated, and sure it has since '94 and the
broad deployment of CIDR. Actually forbidding two whole subnets just
to get a hack working so that damn old RIP doesn't need to communicate
netmasks and still not fail is a hack in itself and its extreme
penetration of the IP community is surprising (I have heard stories
from Cisco support persons who didn't know what "ip subnet zero" and
"ip classless" are good for and why they exist at all).
I wouldn't change my IPs if a silly piece of hardware can't handle
it correctly - I'd rather trash the silly piece of hardware. For
gods sake this is _no_ problem with Ascend gear ;->
--
Kanther-Line: PGP SSH IDEA MD5 GOST RIPE-MD160 3DES RSA FEAL32 RC4
+-o-+--------------------------------------------------------+-o-+
| o | \\\- Brain Inside -/// | o |
| o | ^^^^^^^^^^^^^^ | o |
| o | Andre' Beck (ABPSoft) beck@ibh-dd.de XLink PoP Dresden | o |
+-o-+--------------------------------------------------------+-o-+
++ Ascend Users Mailing List ++
To unsubscribe: send unsubscribe to ascend-users-request@bungi.com
To get FAQ'd: <http://www.nealis.net/ascend/faq>
References: