Re: DHCPv6 host route in client side

Do you have "ipv6 unicast-routing" and "ipv6 nd route-owner enabled?
Regards,

Cristian Matei, 2 x CCIE #23684 (R&S/SC)
cmatei_at_INE.com<mailto:cmatei_at_INE.com>

Internetwork Expert, Inc.
http://www.INE.com

From: Daniel Barney Briseqo
<daniel.barney.b_at_hotmail.com<mailto:daniel.barney.b_at_hotmail.com>>
Date: Friday 25 April 2014 19:56
To: Cristian Matei <cmatei_at_ine.com<mailto:cmatei_at_ine.com>>, Carlos G Mendioroz
<tron_at_huapi.ba.ar<mailto:tron_at_huapi.ba.ar>>, CCIE Group Study
<ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>>
Subject: RE: DHCPv6 host route in client side

Hello
I do have ipv6 nd autoconfig prefix on my configuration.
I am not installing a route for the directed connected subnet.
Thx!

> From: cmatei_at_ine.com<mailto:cmatei_at_ine.com>
> To: daniel.barney.b_at_hotmail.com<mailto:daniel.barney.b_at_hotmail.com>;
tron_at_huapi.ba.ar<mailto:tron_at_huapi.ba.ar>;
ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>
> Date: Fri, 25 Apr 2014 06:12:52 -0500
> Subject: Re: DHCPv6 host route in client side
>
> Hi,
>
> IPv6 dynamic address assignment was scoped to work with SLAAC.
> DHCPv6 does NOT carry a network mask, thus the client will always install
> a /128 IPv6 address. The client will learn the network mask and directly
> connected subnet from ND messages; if the client is a Cisco device, in
> order to make this work and install a route for the directly
> connected/attached subnet you need the interface-level command "ipv6 nd
> autoconfig prefix2 and the global command (which is default) "ipv6 nd
> route-owner2; and of course to install a IPv6 route you need IPv6
> unicst-routing enabled on the client.
> DHCPv6 does NOT carry a default gateway, thus the client will learn the
> default-router from ND messages; if the client is a Cisco device, in order
> to make this work which translates to installing a default route, you need
> the interface-level command "ipv6 nd autoconfig default-route2 and the
> global commands "ipv6 nd route-owner2 , 3ipv6 unicast-routing2.
>
> So there is no bug, it9s a feature.
>
> Regards,
>
> Cristian Matei, 2 x CCIE #23684 (R&S/SC)
> cmatei_at_INE.com<mailto:cmatei_at_INE.com>
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
>
>
>
> On 25/04/14 02:52, "Daniel Barney Briseqo"
<daniel.barney.b_at_hotmail.com<mailto:daniel.barney.b_at_hotmail.com>>
> wrote:
>
> >A /64 since thats what I have in my pool.I am getting /128 so I am not
> >able to
> >communicate with other host in the same network.
> >
> >> Date: Thu, 24 Apr 2014 06:45:17 -0300
> >> From: tron_at_huapi.ba.ar<mailto:tron_at_huapi.ba.ar>
> >> To: daniel.barney.b_at_hotmail.com<mailto:daniel.barney.b_at_hotmail.com>;
ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>
> >> Subject: Re: DHCPv6 host route in client side
> >>
> >> Daniel,
> >> I'm sure asleep, but what exactly is the problem ?
> >> What kind of route do you expect from DHCP ?
> >> -Carlos
> >>
> >> Daniel Barney @ 23/04/2014 23:23 -0300 dixit:
> >> > Hello everyone
> >> > I am studing DHCPv6 and I am having trouble with the prefix my client
> >>is
> >> > taking.
> >> > On my server I have the following config:
> >> >
> >> > SERVER f0/0 ------f0/0 CLIENT
> >> >
> >> > SERVER SIDE:
> >> > interface FastEthernet0/0
> >> > no ip address
> >> > duplex full
> >> > speed auto
> >> > ipv6 address 1991:11::1/64
> >> > ipv6 nd autoconfig prefix
> >> > ipv6 dhcp server TST
> >> > !
> >> > end
> >> >
> >> > !
> >> > ipv6 unicast-routing
> >> > ipv6 cef
> >> > ipv6 dhcp pool TST
> >> > address prefix 1991:11::/64
> >> > domain-name cisco.com
> >> >
> >> >
> >> > CLIENT SIDE
> >> >
> >> > !
> >> > interface FastEthernet0/0
> >> > no ip address
> >> > duplex full
> >> > ipv6 address dhcp
> >> > ipv6 enable
> >> > ipv6 nd autoconfig prefix
> >> > ipv6 nd managed-config-flag
> >> > !
> >> > end
> >> >
> >> > Client does takes an IP but this one is a host route
> >> >
> >> > CLIENT(config-if)#do sh ipv6 route
> >> > IPv6 Routing Table - default - 2 entries
> >> > Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
> >> > B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
> >> > I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
> >> > EX - EIGRP external, ND - Neighbor Discovery
> >> > O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF
> >>ext
> >2
> >> > ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
> >> > LC 1991:11::39E9:5DFD:BAFC:944A/128 [0/0]
> >> > via FastEthernet0/0, receive
> >> > L FF00::/8 [0/0]
> >> > via Null0, receive
> >> >
> >> > I did a bit of research and I found it is a bug and that ipv6 nd
> >autoconfig
> >> > prefix command will istall a /64 since thats what I have in my
> >>pool.But
> >this
> >> > is not working.
> >> >
> >> > Can you guys help me out with this please? I tested this on 12.4T
> >>(Real
> >gear)
> >> > and 15.0M (GNS3) and same behaivor
> >> >
> >> >
> >> > ---
> >> > Daniel Barney Briseqo
> >> > "El ultimo minuto tambiin tiene 60 segundos"
> >> > Cel: (55) 31 00 52 26
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
> >>_______________________________________________________________________
> >> > Subscription information may be found at:
> >> > http://www.groupstudy.com/list/CCIELab.html
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >>
> >> --
> >> Carlos G Mendioroz <tron_at_huapi.ba.ar<mailto:tron_at_huapi.ba.ar>> LW7 EQI
Argentina
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >>
> >> _______________________________________________________________________
> >> Subscription information may be found at:
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> >
> >
> >Blogs and organic groups at http://www.ccie.net
> >
> >_______________________________________________________________________
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>
>
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Received on Fri Apr 25 2014 - 12:00:10 ART