RE: Ethernet over MPLS

OK.....getting back to the original question from Mr.Mousawi "preserving the
customer vlans on the L2VPN in a SP environment.

If its a Metro Ethernet provider then this Provider will configure 802.1q
tunneling on the switch connected to the customer's interface, however few
things on the provider switch needs to be configured which includes increasing
the mtu size 1504 or higher for super stacking of additional Vlan tags from
the customer. On the PE side pseudowires between the targeted LDP neighbers in
the povider network do the job. If point to point circuit then xconnect
commands under the SVI interface pointing to the remote LDP neighbor in
Provider network, 2nd type is point to mutipoint customer in this case then
CE facing Provider switch will use trunk to pass customer Vlans and multiple
trageted ldp commands will go under the VFI, finally this VFI will go under
the SVI interface on the PE router. Third one is VPLS that is used for the
multipoint to multipoint circuits for the customer.

Point to Multipoint Layer 2 VPN on PE router Configurations:

=============================================

l2 vfi ABC manual
 vpn id 3147
 neighbor 172.16.X.Y encapsulation mpls
 neighbor 172.16.X.Z encapsulation mpls

interface Vlan3147
 mtu 9216
 no ip address
 no ip igmp snooping
 no ipv6 mld snooping
 xconnect vfi ABC

Note : Under the SVI interface always make sure to have the same mtu size on
both PE routers creating L2transport VC.

So the answer to the question is that Dot1.q tunneling will preserve the
customer vlans.

Thanks,

Ahmad Bilal

> From: rab_91_at_hotmail.com
> To: vsrinivas.paturi_at_gmail.com; bbartik_at_ipexpert.com
> CC: nilsi2002_at_gmail.com; mousawi.ali_at_gmail.com; ccielab_at_groupstudy.com
> Subject: RE: Ethernet over MPLS
> Date: Thu, 23 Jul 2009 22:19:28 +0000
>
> Guys,
>
> If we look at the blue print it is mentioned about L2tpv3, Layer 2 VPNS
> and other stuff. I believe the AToM, xconnects and the Interworking will be
> convered according to the Lab blue print. I'll recomend reading MPLS in
Cisco
> IOS book, as the topics covered in this book are very close to the Lab exam
> Blue print for SP.
>
>
>
>
>
>
>
> Thanks,
>
> Ahmad Bilal
>
> > Date: Fri, 24 Jul 2009 01:19:40 +0530
> > Subject: Re: Ethernet over MPLS
> > From: vsrinivas.paturi_at_gmail.com
> > To: bbartik_at_ipexpert.com
> > CC: nilsi2002_at_gmail.com; mousawi.ali_at_gmail.com; ccielab_at_groupstudy.com
> >
> > Hi Bryan,
> >
> > mpls l2transport is old CLI (not related to any H/W and was used only for
> > AToM), and it is replaced by new CLI xconnect (AToM/L2TPv3/L2IW). I think
> in
> > SP lab, only xconnect will be covered.
> >
> > Thanks,
> > Srinivas
> >
> > On Fri, Jul 24, 2009 at 12:55 AM, Bryan Bartik <bbartik_at_ipexpert.com>
> wrote:
> >
> > > Not exactly sure of the differences, but the mpls l2transport I believe
> is
> > > on the 6500s and higher end models. I don' think it can be covered on
the
> > > software/hardware in the SP lab. Someone please correct if I am wrong.
> > >
> > > On Thu, Jul 23, 2009 at 12:34 PM, Rich Collins <nilsi2002_at_gmail.com>
> > > wrote:
> > >
> > > > Hi,
> > > >
> > > > Sorry but I don't have that book and was wondering about the QinQ
> method.
> > > >
> > > > Is the "xconnect {destination vc-id encapuluation mpls} " replacing
> > > > the "mpls l2transport route" or vice-versa? Which should we be
> > > > concerned with for the hardware/IOS on the SP exam?
> > > >
> > > > Thanks
> > > > Rich
> > > >
> > > >
> > > >
> > > > On Wed, Jul 22, 2009 at 4:21 PM, Bryan Bartik<bbartik_at_ipexpert.com>
> > > wrote:
> > > > > Ali,
> > > > >
> > > > > In the book "L2 VPN Architectures" you can see case study 7-5 which
> > > > presents
> > > > > a QinQ method. The access circuit on the CE is a trunk and on the
PE
> > > side
> > > > it
> > > > > is a dot1-tunnel with an access vlan. Under the SVI for the access
> VLAN
> > > > > there is an "mpls l2transport route" command that connects to the
> > > > opposite
> > > > > PE.
> > > > >
> > > > > -hth
> > > > >
> > > > > On Wed, Jul 22, 2009 at 2:25 AM, Ali El Moussaoui <
> > > mousawi.ali_at_gmail.com
> > > > >wrote:
> > > > >
> > > > >> Hello Guys,
> > > > >>
> > > > >> How do we preserve customer VLANs over L2VPN in an MPLS network?
> > > > >>
> > > > >> Ali
> > > > >>
> > > > >>
> > > > >> Blogs and organic groups at http://www.ccie.net
> > > > >>
> > > > >>
> > > _______________________________________________________________________
> > > > >> Subscription information may be found at:
> > > > >> http://www.groupstudy.com/list/CCIELab.html
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >
> > > > >
> > > > > --
> > > > > Bryan Bartik
> > > > > CCIE #23707 (R&S), CCNP
> > > > > Sr. Support Engineer - IPexpert, Inc.
> > > > > URL: http://www.IPexpert.com
> > > > >
> > > > >
> > > > > Blogs and organic groups at http://www.ccie.net
> > > > >
> > > > >
> _______________________________________________________________________
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> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > Bryan Bartik
> > > CCIE #23707 (R&S), CCNP
> > > Sr. Support Engineer - IPexpert, Inc.
> > > URL: http://www.IPexpert.com
> > >
> > >
> > > Blogs and organic groups at http://www.ccie.net
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
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> >
> >
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> >
> >
> >
> >
> >
>
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Received on Thu Jul 23 2009 - 23:22:53 ART