From: Sam Munzani (sam@xxxxxxxxxxx)
Date: Mon Sep 11 2000 - 10:32:24 GMT-3
Simply create a virt link to area 0. use "no peer neighbor route" at
interface to avoid any link flaps. One side should be ospf demand circuit.
and make sure your HDLC link show higher bandwidth.
Since HDLC has higher bandwidth packets will always take that route. ISDN
will be used only for routing updates when DNA timers expires. When HDLC
goes down OSPF will automatically pick up ISDN as best route.
Sam
> Kennith,
> The tunnel option looks cool but, for your original question... wouldn't
> dialer profiles solve this since they would not have the BRI interface
> configured directly with IP/IP routing? Anyway, that's my thoughts on the
> matter.
> Hope this helps...
> Dave McFetridge
>
> -----Original Message-----
> From: Kenneth Kriel [mailto:ken@flane.com]
> Sent: Sunday, September 10, 2000 9:47 AM
> To: 'Ccielab
> Subject: Interesting ISDN/OSPF problem - 2nd try
>
>
>
> Gentleman,
>
> I just tried the tunnel option and as Sanjay said " It works beautifully".
>
> Now I would like to add a twist to it and confirm my suspision.
>
> Layout :
>
> OSPF
> area1 area 2 area 3 area0
> ---e0--R1--e1----e1--R2--e0----e0--R3--e1---
> | |
> ----ISDN with tunnel (area4---
>
> I can reach area 1 through the tunnel (area4)and area 4 as a virtual link
> for area 1 and 2 but know I would like to reach area 3 as well, when R3's
> ether 0 is down. As far as I know this is not possible, but I have learnt
> that I should not assume.
>
> Could this be done, how could I create a virtual link through two areas ?
> >From area 3 through area 2 and area 4 ?
>
>
> Thank you for your input !
>
> Ken
>
>
>
>
>
> -----Original Message-----
> From: Maljure, Sanjay [mailto:smaljure@cibernetworks.com]
> Sent: Thursday, September 07, 2000 2:50 AM
> To: 'Kenneth Kriel'; 'Ccielab; Kent
> Subject: RE: Interesting ISDN problem
>
>
> Hi
> I just tried the tunnel option. It works beautifully. No routing protocols
> or static routes involving the Bri's. I just created the tunnel interfaces
> with the tunnel source and the tunnel destinations as the ip addresses
> assigned to the Bri interfaces. Made the tunnel interfaces part of the
OSPF
> process. (BRI is not a part of the OSPF process)
> "backup int bri 0" on the HDLC serial interfaces.
> When the HDLC link goes down,
> BRI comes up, hence tunnel comes up and routes are learnt through the
tunnel
> interface
>
> If we configure "ospf demand-circuit" on the tunnel interface then the bri
> won't stay up because of OSPF hellos. However the routes will.
>
> Let me know if u need the configs. I was wondering if any of u guys got it
> working with BVI's??
>
> Sanjay
>
>
> -----Original Message-----
> From: Kenneth Kriel [mailto:ken@flane.com]
> Sent: Wednesday, September 06, 2000 4:50 AM
> To: 'Ccielab; Kent
> Subject: RE: Interesting ISDN problem
>
>
>
> I think that will work - I will try it, it seems like a really great idea
!
>
> Ken
>
> -----Original Message-----
> From: Kent [mailto:cciecn@yahoo.com]
> Sent: Tuesday, September 05, 2000 2:55 PM
> To: Kenneth Kriel; 'Ccielab
> Subject: RE: Interesting ISDN problem
>
>
> Kent,
>
> Do you mean put the ip address of ISDN on a BVI and
> put them in the bridge group, I think this should
> work. how about tunnel? can you just tunnel the
> routing across the ISDN and put the tunnel interface
> into the ospf?
>
> Thanks
>
> Kent
>
> --- Kenneth Kriel <ken@flane.com> wrote:
> >
> > Guys,
> >
> > No, the idea is to have no routing protocol
> > configured on the ISDN link. No
> > ospf/rip/igrp/eigrp.
> >
> > As Aaron, was saying, all the normal ISDN
> > configuration options will not
> > really work as you still need to have either some or
> > other static route or
> > routing protocol configured.
> >
> > I was wondering about configuring the ISDN as a
> > bridged interface, or using
> > IRB. When using bridging you could also use the
> > backup interface I assume ?
> > Has anyone tried this ?
> >
> > Ken
> >
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com
> > [mailto:nobody@groupstudy.com]On Behalf Of
> > Graham Shaw
> > Sent: Monday, September 04, 2000 2:24 PM
> > To: 'Kenneth Kriel'; 'Ccielab
> > Subject: RE: Interesting ISDN problem
> >
> >
> > When you state no routing protocol on the WAN. Do
> > you mean you do not want
> > hellos keeping the ISDN link up?
> > If this is the case ospf supports on-demand circuits
> > (only configure on 1
> > end).
> >
> > You have to have some kind of route to the
> > destination. Be it static or
> > dynamic! The router will buid a dynamic route on an
> > unnumbered link but it
> > will be host based so you cannot rely on this.
> >
> > Graham
> >
> > -----Original Message-----
> > From: Kenneth Kriel [mailto:ken@flane.com]
> > Sent: 04 September 2000 15:25
> > To: 'Ccielab
> > Subject: Interesting ISDN problem
> >
> >
> >
> > Gentleman,
> >
> > My network layout :
> >
> > ISDN
> > ----------
> > | |
> > -e0--RA--HDLC--RB--e0
> > OSPF OSFP
> >
> > When HDLC link fails - enable ISDN as backup, BUT
> > ....
> > No static routes and no routing protocol on ISDN
> >
> > Can this be done ? If so how ?
> >
> >
> > I would like your input on this !
> >
> > Ken
> >
> >
>
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