[cisco-bba] PPPoE with Routed Subnet

[Patrick Wu]

Thanks to all!

I'll give a try on the suggested solutions and will advise of the outcome.

cheers,
Patrick

On Wed, Jan 14, 2009 at 3:49 AM, Frank Bulk <frnkblk at iname.com> wrote:

> Brian is basically suggesting that the service provider route the /29 via
> the IP address the PPPoE client obtains.  That means the customer has an
> outside (PPPoE) and inside (/29) interface.
>
> I haven't tried bridging, but I would think it's possible to have the
> service provider's RADIUS server hand out an IP address from the /29 block
> to the PPPoE client, and then bridge the other IPs in the /29.
>
> I think it would be much more straight forward if you could have bridged
> connection or do what Brian recommended.
>
> Frank
>
> -----Original Message-----
> From: cisco-bba-bounces at puck.nether.net
> [mailto:cisco-bba-bounces at puck.nether.net] On Behalf Of Brian Raaen
> Sent: Monday, January 12, 2009 6:21 PM
> To: cisco-bba at puck.nether.net
> Subject: Re: [cisco-bba] PPPoE with Routed Subnet
>
>  Patrick,
>        If this is like most of the PPPoE setups I have worked with (I work
> on the
> service provider side of things) you would have a static that is assigned
> to
> the wan of your router using ipip, and the /29 is routed to that
> address(think - ip route $subnet 255.255.255.248 $static).  When that
> subnet
> hits your router you can do pretty much anything you want to with it.  We
> usually suggest that customers assign the first usable to the lan of their
> router (usually ala linksys variety) and make sure that nat(or gateway
> mode)
> is turned off.  They would set up their internal host using an ip out of
> the
> subnet with the router internal as their gateway.  Some customers even add
> a
> second router for NATing (if you are using lo end soho routers that may be
> your only option).  Since you are using a IOS powered cisco you can look
> into
> using something like 1:1 nat to allow you to use all 8 addresses in the
> subnet if you want to make sure to use one for pat (i.e. standard nat) if
> you
> need to.
>
>
> ----------------------
>
> Brian Raaen
> Network Engineer
> braaen at zcorum.com
>
> On Sunday 11 January 2009, Patrick Wu wrote:
> > Hi Everyone,
> >
> > I have a DSL connection running PPPoE with a routed subnet, the service
> > provider indicated that it will use the 1st IP address of the routed
> subnet
> > for the router (WAN?), and the rest of the IPs of the subnet can be
> assigned
> > to the hosts behind the router.
> >
> > What I want to know is whether I need a bridged interface between the WAN
> > and LAN side of the router (Cisco877), and what configuration will help
> me
> > achieve this?
> >
> > Thanks to all!
> >
> > What I have so far (was doing NAT before, but probably will remove it
> > later):
> >
> > interface ATM0
> >  no ip address
> >  no atm ilmi-keepalive
> >  dsl operating-mode auto
> >  service-policy output SIP-priority
> > !
> > interface ATM0.1 point-to-point
> >  description $FW_OUTSIDE$$ES_WAN$
> >  pvc 8/35
> >   pppoe-client dial-pool-number 1
> >  !
> > !
> > interface FastEthernet0
> > !
> > interface FastEthernet1
> > !
> > interface FastEthernet2
> > !
> > interface FastEthernet3
> > !
> > interface Vlan1
> >  description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$$ES_LAN$$FW_INSIDE$
> >  ip address 192.168.0.1 255.255.255.0
> >  ip nat inside
> >  ip virtual-reassembly
> >  ip tcp adjust-mss 1412
> > !
> > interface Dialer0
> >  description $FW_OUTSIDE$
> >  ip address negotiated
> >  ip mtu 1452
> >  ip nat outside
> >  ip virtual-reassembly
> >  encapsulation ppp
> >  dialer pool 1
> >  dialer-group 1
> >  no cdp enable
> >  ppp authentication pap callin
> >  ppp pap sent-username xxxx at xxxx password 7 xxxx
> > !
> > ip forward-protocol nd
> > ip route 0.0.0.0 0.0.0.0 Dialer0
> > !
> > ip nat translation udp-timeout never
> > ip nat inside source list 1 interface Dialer0 overload
> >
>
>
> _______________________________________________
> cisco-bba mailing list
> cisco-bba at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-bba
>
> _______________________________________________
> cisco-bba mailing list
> cisco-bba at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-bba
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-bba/attachments/20090114/8cc0fd1d/attachment.html>