From: Ong Boon Hui (ongbh@cet.st.com.sg)
Date: Mon Feb 17 2003 - 21:30:52 GMT-3
Hi Group,
Apologies, what I meant is to have backup for serial interface, ospf demand
cct and snaphot for RIP running concurrently on the BRI interface and what
wold be the predominant behavior. So far it seemed to me that backup
interface is dominating. i.e for example, snapshot would not come up if the
serial interface does not go down and BRI not triggered. True ?
Debarros
----- Original Message -----
From: "John Underhill" <steppenwolfe_2000@yahoo.com>
To: "Ong Boon Hui" <ongbh@cet.st.com.sg>; <ccielab@groupstudy.com>
Sent: Monday, February 17, 2003 11:13 PM
Subject: Re: ospf demand circuit and backup interface & snapshot
concurrently
> Snapshot routing is for distance vector protocols, ie
> RIP. I don't think this is going to work for OSPF.
> Perhaps demand circuit or standby on their own. If the
> serial is down and the BRI has a route to the other
> router, I would expect it to stay up until a lack of
> interesting traffic brings it down. Snapshot comes up
> to exchange routing updates or for interesting
> traffic. If the BRI has a route to the other router,
> regardless of tunnel, BRI should come up when traffic
> is sent to that destination.
> --- Ong Boon Hui <ongbh@cet.st.com.sg> wrote: > Hi
> Group,
> >
> > Would like to know the effect of the above
> > concurrently.
> >
> > Pls hlp look at the following configuration : -
> >
> > interface BRI0
> > ip address 172.16.56.5 255.255.255.248
> > no ip directed-broadcast
> > encapsulation ppp
> > ip ospf cost 9999
> > ip ospf demand-circuit
> > dialer idle-timeout 30
> > dialer map snapshot 1 name r6 broadcast xxxxxxxxx
> > dialer map ip 172.16.56.6 name r6 broadcast xxxxxxx
> > dialer load-threshold 1 outbound
> > dialer-group 1
> > isdn switch-type basic-net3
> > snapshot client 5 10 dialer
> > no peer neighbor-route
> > ppp authentication chap
> > ppp multilink
> >
> > router ospf 1
> > router-id 5.5.5.5
> > area 0 authentication message-digest
> > area 0 range 172.16.100.0 255.255.255.0
> > redistribute connected subnets route-map connect
> > redistribute eigrp 1 metric-type 1 subnets
> > route-map eigrp1_2_ospf
> > redistribute eigrp 14 metric-type 1 subnets
> > route-map eigrp1_2_ospf
> > redistribute rip metric-type 1 subnets tag 11
> > route-map rip_2_ospf
> > network 5.5.5.5 0.0.0.0 area 0
> > network 10.10.10.5 0.0.0.0 area 50
> > network 172.16.5.1 0.0.0.0 area 0
> > network 172.16.56.5 0.0.0.0 area 0
> > network 172.16.100.5 0.0.0.0 area 0
> > network 172.16.104.5 0.0.0.0 area 25
> >
> >
> > My questions : -
> >
> > 1. Will a change in any OSPF link state database
> > fire the ISDN ? I would think
> > not as it is under standby mode for the serial
> > interface.
> >
> > 2. I initiated a shut down on my frame-relay for the
> > serial interface. OSPF
> > came up on the bri 0 and does not go down for the
> > dialer idle timeout which is
> > 10 seconds. Recovered the frame relay link and the
> > bri came down. Is this teh
> > right behaviour.
> >
> > 3. Does this means the snapshot will only work when
> > the frame relay goes down
> > ?
> >
> > 4. If I have another GRE tunnel that goes across the
> > frame relay cloud and
> > runs RIP through it. When the serial interface is
> > down, will RIP or GRE tunnel
> > trigger the BRI interface ?
> >
> > Thx,
> > Debarros
> >
> >
>
> ______________________________________________________________________
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