Dear Daniel, and all,
Yes, I confirm if you order a /30, /29, /28, etc to VTX, the first IP of the
subnet is assigned to the CPE with the right mask associated.
This setup works on Cisco and Zyxel ADSL as the WAN interface is using
the IP from the LAN side and the LNS sees both a /32 and a /30
route...not sure about other xDSL CPEs though (o;
I confirm, this setup works on most of the CPE. For exemple with a /30 you have
one IP for your LAN gateway and one usable. That's normal, it's a /30. :)
Have a nice day,
Jerome
-Message d'origine-
De : [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] De la part de Daniel
Roethlisberger
Envoyé : dimanche, 3. juin 2007 22:46
À : [EMAIL PROTECTED]
Objet : Re: [swinog] vtx ADSL /30 subnet practice
[EMAIL PROTECTED] [EMAIL PROTECTED] 2007-06-03:
This setup works on Cisco and Zyxel ADSL as the WAN
interface is using
the IP from the LAN side and the LNS sees both a /32 and a /30
route...not sure about other xDSL CPEs though (o;
In this setup, the PPP endpoint address of the CPE router is
the same as it's LAN address, and the customer still gets his
/30 network to use as expected, i.e. there's an address left
for, say, a server.
In the vtx case (if correct), there is nothing of the /30
left to the customer to use, except the WAN address assigned
via PPPoX. Granted, this does not sound very sane, since the
customer pays for a /30 which he does not get.
Maybe the vtx engineers just had bad luck explaining the
above to the customer.
Cheers
-Dan
cheers
rick
Daniel Roethlisberger schrieb:
It seems that vtx has some very strange way of configuring the /30
subnet when customers order 4 fix IP addresses.
Normally when someone orders a /30, the ADSL router's PPP
interface
would get an address from an unrelated address range. The 4
addresses from the customer's /30 subnet can be used by
the custumer
for the network and broadcast addresses (-2), the router's LAN
interface (-1), leaving one address for a server or
desktop machine.
However, this seems not to be the case at vtx.ch. As two vtx
engineers explained to a (tech-savvy dipl. Inform.) customer, they
use the addresses from the /30 subnet for the PPP link
between their
last router and the customer's ADSL router. So in effect,
this means
ordering a /30 subnet (the 4 fix IP addresses option) from
vtx gets
you the same as ordering a single fix IP address -- you
get a static
address on your ADSL router's PPPoA/PPPoE interface, period. To
actually use the static address on a server/desktop, you need to
either configure destination NAT on your router or operate it in
bridging mode and run PPPoE directly from the server/desktop.
Can anybody confirm that this is current practice at vtx?
Are other
providers doing the same?
-Dan
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Daniel Roethlisberger [EMAIL PROTECTED]
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