RE: OSPF SHAM LINKS

A sham link is required only between two VPN sites that belong to the same
area and have the backdoor link for backup needs

Ricardo

> From: hussamkibbi_at_hotmail.com
> To: narbikk_at_gmail.com
> CC: ccielab_at_groupstudy.com
> Subject: RE: OSPF SHAM LINKS
> Date: Fri, 4 Feb 2011 00:48:45 +0000
>
> Thank you all for the valuable information.But my question is: Do we need
Sham
> link if we already have inter-area:
>
> R1---MPBGP--------R2
> | | | |OSPF Area 1
> OSPF Area 2 | | |
|R3--Ospf
> area 0----R4
>
> I tried scenario above on GNS and I didn't see any difference, before and
> after using sham links.R4 can see R3 through mpls as Inter-area without
sham
> links.
> So do we need it here for any reason?maybe as design for super backbone
area
> 0?
>
>
>
>
> > Date: Thu, 3 Feb 2011 11:37:15 -0800
> > Subject: Re: OSPF SHAM LINKS
> > From: narbikk_at_gmail.com
> > To: hussamkibbi_at_hotmail.com
> > CC: ccielab_at_groupstudy.com
> >
> > Just to add to whats been said here....
> > You could actually configure Sham-link for back door and GRE through the
> > cloud for "O" routes, these are some of your options, it all depends what
> > you like to do.
> >
> > On Thu, Feb 3, 2011 at 9:18 AM, Hussam EL Kebbi
> <hussamkibbi_at_hotmail.com>wrote:
> >
> > > Hi Experts,
> > > Do we need Sham-links between OSPF Inter area (then MPBGP) having same
> > > domain-id?
> > > or it is only needed to keep the intra area routes as Intra area
routes?
> > >
> > > Thanks,
> > >
> > >
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> >
> > --
> > *Narbik Kocharians
> > *CCSI#30832, CCIE# 12410 (R&S, SP, Security)
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Received on Thu Feb 03 2011 - 22:04:30 ART