From: LASSERRE Grégory (gregory.lasserre@xxxxxxxx)
Date: Mon Apr 24 2000 - 11:31:48 GMT-3
> -----Message d'origine-----
> De: LASSERRE Grégory
> Date: samedi 22 avril 2000 17:58
> À: 'Maljure, Sanjay'
> Cc: 'ccielab@groupstudy.com'
> Objet: RE: Challenge : HSRP
>
>
> Sorry for this fast answer,
> but after some time i realized that this solution does not work.
> The problem is that even if the PVC between R1 and R3 fails, the
> tunnel stays up because the FR CLOUD IP network is still up
> in R1 route-table...
>
> So the solution to this challenge is still not found...!
> You have to find the other alternative i was talking about
> in my previous email.
>
> Cheers
> Greg.
>
> -----Message d'origine-----
> De: LASSERRE Grégory
> Date: samedi 22 avril 2000 15:01
> À: 'Maljure, Sanjay'
> Cc: 'ccielab@groupstudy.com'
> Objet: RE: Challenge : HSRP
>
>
> Hi everybody,
> i think we found a winner :
>
> Maljure found the solution..!
> Congratulations !
>
> However, here is an extension to this question :
> what's happen if you are not allowed to use the
> mapping to R3's s0.1 interface as tunnel destination ?
> What is the other alternative ?
>
> Cheers
> Greg.
>
> Ps: Maljure, thanks to have wait a little bit to give the answer
> ;o))
>
> -----Message d'origine-----
> De: Maljure, Sanjay [SMTP:smaljure@cibernetworks.com]
> Date: vendredi 21 avril 2000 20:10
> À: 'LASSERRE Grégory'
> Cc: 'ccielab@groupstudy.com'
> Objet: RE: Challenge : HSRP
>
> Hi Gregory,
>
> We cannot "track" the s0.1 interface on R1 because even if
> the PVC between
> R1 and R3 fails, the line protocol will stay up (because
> s0.1 is a
> point-to-multipoint interface)
>
> So how about this... (I haven't tried this one but looks
> promising)
>
> Create a tunnel interface on R1 and R3 with the tunnel
> source as R1's s0.1
> and tunnel destination as R3's s0.1
> If the PVC between R1 and R3 fails, then R1 would lose the
> mapping to R3's
> s0.1 interface, which means the tunnel interface would go
> down....
>
> So we can "track" this tunnel interface and decrement the
> priority of R1...
>
> Again, I haven't tried this but what do u think?
>
> Sanjay
>
>
>
> -----Original Message-----
> From: LASSERRE Grégory [mailto:gregory.lasserre@arche.fr]
> Sent: Friday, April 21, 2000 11:57 AM
> To: ccielab groupstudy
> Subject: Challenge : HSRP
>
>
>
> Hi guys,
>
> I've got a challenging question i worked on last week
> regarding HSRP.
> The solution is not so trivial, and it took me a while to
> find the answer
> (so i hope you won't find the solution too quickly ;o)
>
> Just let's go :
>
> R1,R2, and R3 routers are full-meshed over FR,
> using point-to-multipoint interfaces.
>
> R1 and R2 are also connected via Ethernet.
> R3 has an LAN interface (Eth, or Token. As you wish)
>
> You are running HSRP between R1 and R2 ; and R1 is your
> Active router by
> default.
>
> What you want to do is to configure the routers so that
> R2 becomes the Active router IF and ONLY IF the DLCI between
> R1 and R3 fall
> down.
>
> Note: You have to run OSPF on the FR cloud (R1, R2, R3 are
> in Area 0)
>
> Good luck,
> and please don't ridiculate me finding the solution in 3
> minutes ;o)
>
> Cheers.
> Greg.
>
>
> ------------------------------------------------------------------------
> Gregory LASSERRE Tel. : +33 1 69 18 98 53
> Network Engineer Fax : +33 1 69 28
> 55 01
> ARCHE Groupe SIEMENS Std : +33 1 69 18 32 32
> FRANCE
>
> E-mail : gregory.lasserre@arche.fr
>
> ------------------------------------------------------------------------
>
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