[c-nsp] ip helper within L3VPN

[Aaron]

To circle back on this....

Interestingly the way I had it yesterday worked, but I'm seeing this is the
way the documentation suggests how to do it...

Doc...
----------------------------------------------------------------------------
-----------------------------

dhcp ipv4
 profile ftth relay
  helper-address vrf one 192.168.254.13
 !
 interface BVI10 relay profile ftth
 interface BVI11 relay profile ftth

---- with nothing helper-wise config'd on interface level....

The way I did it yesterday,
----------------------------------------------------------------------------
----

...worked but not the way the aforementioned doc says to do it....

dhcp ipv4
 profile test relay
  helper-address vrf one 192.168.254.13
 
 interface BVI10
 vrf one
 ipv4 helper-address vrf one 192.168.254.13
 ipv4 address 5.6.7.8 255.255.252.0
 ipv4 address 1.2.3.4 255.255.255.0 secondary




-----Original Message-----
From: Aaron [mailto:aaron1 at gvtc.com] 
Sent: Tuesday, June 05, 2012 5:24 PM
To: 'Janez Novak'
Cc: cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] ip helper within L3VPN

Janez, you are awesome!  That did it.  I tried with only dhcp relay profile
and didn't work, then I also added back the interface level ip helper vrf
one (not vrf default, like it defaulted to originally) and BANG!

Thanks again.  Huge Help Janez

Aaron

conf
 
dhcp ipv4
 profile test relay
  helper-address vrf one 192.168.254.13
 
 
interface BVI10
 vrf one
 ipv4 helper-address vrf one 192.168.254.13
 ipv4 address 5.6.7.8 255.255.252.0
 ipv4 address 1.2.3.4 255.255.255.0 secondary
 
commit






-----Original Message-----
From: Janez Novak [mailto:jnovak123 at gmail.com]
Sent: Tuesday, June 05, 2012 4:54 PM
To: Aaron
Subject: Re: [c-nsp] ip helper within L3VPN

Hi Aaron,

Use VRF in helper address command as you mentioned it otherwise it leaks
into global routing table. If it still does not work try following
documentation :-)
http://www.cisco.com/en/US/docs/routers/asr9000/software/asr9k_r4.2/addr_ser
v/configuration/guide/b_ipaddr_cg42a9k_chapter_0100.html#con_1096525

Regards,
Bostjan



On Tue, Jun 5, 2012 at 10:39 PM, Aaron <aaron1 at gvtc.com> wrote:
> I'm having trouble getting dhcp ip helper to work (ip helper on a vrf 
> interface of a asr9k 4.1.2)
>
>
>
> Dhcp server------ce1----pe1---p1-----p2-----p3-----pe2-------dhcp
> client locally connected subnet
>
>
>
> I would think that pe2 wound need to have ip helper on the interface 
> that is locally connected to dhcp client as usual with ip helper.
>
>
>
> When I put ip helper on that interface it default to "vrf 
> default"...even though the interface is  BVI10 - vrf one
>
>
>
> Is that supposed to be that way ?
>
>
>
> I mean if I have my dhcp server on the other side of that l3vpn, 
> should the ip helper statement be ipv4 helper 1.1.1.1 vrf one
192.168.100.1 ?
>
>
>
> Also, is there something else I need to do to make this work?  I'm 
> seeing NO packets at the dhcp server at all.  Pings from vrf asr 
> interface to dhcp server work fine
>
>
>
> Aaron
>
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