RE: extend VLAN (i.e. same broadcast domain) using VRF-Lite

If you are using routing technologies, and Host1 and Host2 are in the same
subnet (network/mask) but these subnets are not on the same broadcast
domain, then Host1 will not be able to contact Host2. For Host1 the
destination should be on the same broadcast domain and it will not contact
the default gateway as the next hop, but will keep sending ARPs.

The term "VLAN" doesn't apply to VRF-lite, which is about how to route
traffic and separate sets of interfaces into separate routing domains
without using MPLS.

Cheers,

Adel Abouchaev, CCIE# 12037, CISSP, MCSE

Netmasterclass LLC, Cisco Learning Partner
RFC821: adel_at_netmasterclass.net
E.164: +18886772669
HTTP: www.netmasterclass.net

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Nahskur Udniraht
Sent: Monday, February 01, 2010 9:15 AM
To: Adel Abouchaev
Cc: ccielab_at_groupstudy.com
Subject: Re: extend VLAN (i.e. same broadcast domain) using VRF-Lite

thankx for the reply ...

if I do not want to maintain same broadcast domain ... can i use VRF-Lite to
extend (same VLAN) same IP subnet over the campus network (where campus core
is L3 only) ?

On Mon, Feb 1, 2010 at 9:46 PM, Adel Abouchaev
<adel_at_netmasterclass.net>wrote:

> If end-to-end switching is possible, use 802.1Q tunnel, otherwise L2TPv3
> tunnel between R1 and R3 (xconnect, etc..)
>
> Adel Abouchaev, CCIE# 12037, CISSP, MCSE
>
> Netmasterclass LLC, Cisco Learning Partner
> RFC821: adel_at_netmasterclass.net
> E.164: +18886772669
> HTTP: www.netmasterclass.net
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Internetwork Expert
> Sent: Sunday, January 31, 2010 9:24 PM
> To: ccielab_at_groupstudy.com
> Subject: extend VLAN (i.e. same broadcast domain) using VRF-Lite
>
> hi gurus,
>
> is there anyway to extend VLAN (same broadcast domain over layer 3
network)
> using VRF-Lite ?
>
> e.g.
>
> Host1 ----- SW1 ----- R1 ------ R3 ------ SW2 ------- Host2
>
> In above simple network ....
> If I need to have same VLAN (e.g. VLAN 100) for both Host1 and Host2 ....
> is it possible using VRF-Lite ?
> Is it depend on SW1/SW2's L3 capability ?
> What are the possible ways to accomplish this ?
>
> thankx,
> nahskur
>
>
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-- 
Nahskur Udniraht
expertinetwork.blogspot.com
Blogs and organic groups at http://www.ccie.net