3 Jun
2007
3 Jun
'07
9:22 p.m.
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
--
Daniel Roethlisberger <daniel(a)roe.ch>
3 Jun
3 Jun
8:04 p.m.
Evnin'
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;
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
10:46 p.m.
richard(a)routerlab.org <richard(a)routerlab.org> 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:
--
Daniel Roethlisberger <daniel(a)roe.ch>
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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9:57 p.m.
New subject: AW: vtx ADSL /30 subnet practice
We have on ADSL an /24
The Broadcast adresses xx.xx.xx.0 and xx.xx.xx.255 arn't to take
And the xx.xx.xx.1 is for the Router this is correct.
If the costumer are useing 4 IP's he must book 8 IP's than he can use 5 IP's
This is normal...
Greetings
X. Aerni
-----Ursprüngliche Nachricht-----
Von: swinog-bounces(a)lists.swinog.ch
[mailto:swinog-bounces@lists.swinog.ch] Im Auftrag von Daniel
Roethlisberger
Gesendet: Sonntag, 3. Juni 2007 21:23
An: swinog(a)swinog.ch
Betreff: [swinog] vtx ADSL /30 subnet practice
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
--
Daniel Roethlisberger <daniel(a)roe.ch>
_______________________________________________
swinog mailing list
swinog(a)lists.swinog.ch
http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
10:45 p.m.
Hi,
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.
or if you have a capable adsl router, you can nat all four addresses to
internal server addresses
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?
this seems like a wierd setup... so for each /30 customer they would
set up one of the four ip addresses on the interface of their provider router?
I don't know about current practice, but older vtx (ex-tiscali, to be precise),
the practice was to get an unrelated ip on the wan interface.
Jiri
11:26 p.m.
Can anybody confirm that this is current practice at
vtx? Are other
providers doing the same?
On a cybernet 4-IP-Addresses ADSL setup I can actively use the two
"middle" IPs in a BRouter setup, the router using the lower address.
The vtx setup you describe is indeed kind of useless. If it's truth
then I guess the vtx people need an update on best practice
recomendations.
Regards,
Jean-Pierre
--
HILOTEC Engineering + Consulting AG - Langnau im Emmental
Energietechnik und Datensysteme: Server, PCs, Linux, Telefonanlagen,
VOIP, Hosting, Datenbanken, Entwicklung, Komplettlösungen für KMUs
Tel: +41 34 402 74 00 - http://www.hilotec.com/
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5 comments
5 participants
participants (5)
-
Daniel Roethlisberger -
Jean-Pierre Schwickerath -
Jiri -
richard＠routerlab.org -
Xaver Aerni