From: sliu@xxxxxxxxx
Date: Wed Dec 12 2001 - 18:22:19 GMT-3
Ron,
You're not stuck. I've just come up with a solution for this situation.
Basically I think that you run a BGP session between rtrA and rtrD,
and have dialer watch configured on rtrD to backup the loopback
address advertised to rtrD from rtrA. Here's the basic configs that
I typed in bare-handed, and I don't have any routers to play with,
please ignore any typos:
rtrA:
interface lo0
ip addr 1.1.1.1 255.255.255.0
router bgp 100
network 1.1.1.0
neighbor 200.200.200.1 remote-as 200 <-- rtrD's serial interface
address
neighbor 200.200.200.1 ebgp-multihop
rtrD:
hostname rtrD
router bgp 100
neighbor 100.100.100.1 remote-as 100 <-- rtrA's serial interface
address
neighbor 100.100.100.1 ebgp-multihop
int bri0
encap ppp
ip addr 3.3.3.3 255.255.255.0
dialer watch-group 1
dialer map ip 4.4.4.4 name rtrB broadcast 5551212
dialer-group 1
dialer watch-list 1 ip 1.1.1.0 255.255.255.0
dialer-list 1 protocol ip list 101
access-list 101 deny eigrp any any
access-list 101 permit ip any any
router eigrp 3
network 3.3.3.0 255.255.255.0
network <other local networks>
rtrB:
hostname rtrB
int bri0
encap ppp
ip addr 4.4.4.4 255.255.255.0
dialer map ip 3.3.3.3 name rtrD broadcast
dialer-group 1
dialer-list 1 protocol ip list 101
access-list 101 deny eigrp any any
access-list 101 permit ip any any
router eigrp 4
network 4.4.4.0 255.255.255.0
network <other local networks>
Hope this will solve your problem, and let me know how this config works
for you.
- Sean
cisco@ronnie.
per.sg To: ccielab@groupstudy.com
Sent by: cc:
nobody@groups Subject: ISDN Backup Issue.
tudy.com
12/11/2001
06:12 PM
Please
respond to
cisco
Hi all,
Have a problem here, would appreciate your help on it. I have a present
senario as follows:
LAN A
|
Router A
|
|
|
Router C ------------------ Router B
| |
Frame | | ISDN
Relay | | Backup
| |
Router E ------------------ Router D
Back to Back |
Serial |
LAN D
1) Router A, B, D belongs to the same company.
2) Router C, E belongs to telco (No changes to be made).
3) Router A has a static route for all LAN D's traffic to Router C.
4) Router C has a static route for all LAN D's traffic to Router E.
5) Router E has a static route for all LAN D's traffic to Router D.
6) Same as reverse for LAN A's traffic.
Question:
What are the available solutions for deploying ISDN backup in this instance
on Router D ?
The link to be back up is the Frame Relay connection between Router C and
Router E.
>From what is given, the problems I'm having is the lack of a dynamic
routing protocol or interface to keep track of. Thus, no backup interface
or floating static can be deploy. Not too sure about dialer watch but as
most of the routes are static, LAN A will be considered "always reachable".
Thanks,
Ron
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:32:42 GMT-3