From: Peter (peter@cyscoexpert.com)
Date: Mon Feb 17 2003 - 02:19:11 GMT-3
1.) Snapshot routing is for distance vector protocols, which OSPF is not.
2.) If you use ISDN interface as a backup to serial, it will ONLY be usable
if that serial goes down.
_____________________________
Peter
#7247 (R&S, Security)
CyscoExpert Corp.
4433 W. Touhy Ave. Suite 410
Lincolnwood, IL 60712
Phone (847) 674-3392
Toll Free (866) CyscoXP (297-2697)
Fax (847) 674-2625
----- Original Message -----
From: "Ong Boon Hui" <ongbh@cet.st.com.sg>
To: <ccielab@groupstudy.com>
Sent: Sunday, February 16, 2003 7:55 PM
Subject: ospf demand circuit and backup interface & snapshot concurrently
> 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
This archive was generated by hypermail 2.1.4 : Sat Mar 01 2003 - 11:06:25 GMT-3