From: Wojtek Iwanczyk (WIwanczyk@xxxxxxxxxx)
Date: Tue Jul 18 2000 - 14:27:41 GMT-3
Here is a sample configuration using EIGRP. Configuring this for OSPF should be
similar. In this scenario I could not use " backup interface, passive interfac
e, etc commands because of complications involving NAT .... The other end of t
he connection should be configured similarly ...
NOTE: when using SNMP either specify source interface of SNMP packets or block
them in an access list. When the dialer goes down due to inactivity, SNMP might
bring it up just to send a notification that it had gone down .. all depends o
n what you route to where ...
interface BRI0/0
no ip address
ip access-group 150 out
no ip directed-broadcast
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-ni
isdn spid1 xxxxxxxxxxxxxx
isdn spid2 xxxxxxxxxxxxxx
ppp authentication chap callin
interface Dialer0
description ISDN Dial-up to - - - - -
ip unnumbered Loopback0
ip broadcast-address 0.0.0.0
ip access-group 150 out
no ip directed-broadcast
ip nat outside
encapsulation ppp
bandwidth 2
delay 6000
dialer remote-name XXXXX
dialer idle-timeout 90
dialer string xxxxxxxxxxx
dialer string xxxxxxxxxxx
dialer pool 1
dialer-group 1
pulse-time 0
ppp authentication chap callin
ppp chap hostname XXXXX
ppp chap password XXXXX
ppp multilink
!
access-list 150 deny udp host x.x.x.x any eq snmp
access-list 150 deny udp host x.x.x.x any eq snmp
access-list 150 deny udp host x.x.x.x any eq snmp
access-list 150 deny udp any any eq snmp
access-list 150 deny eigrp any any
access-list 150 permit ip any any
access-list 160 deny ip host x.x.x.x any
access-list 160 deny ip host x.x.x.x any
access-list 160 deny ip host x.x.x.x any
access-list 160 deny udp any any eq snmp
access-list 160 deny eigrp any any
access-list 160 permit ip any any
dialer-list 1 protocol ip list 160
Wojtek Iwanczyk
Sr Support Engineer
Exenet Technologies
15 E 26th Street
New York, NY 10010
(212) 684 7300
wiwanczyk@exenet.com
>>> "Andy Singh" <ansingh@cisco.com> 07/18/00 12:30PM >>>
Hello
Can any1 tell me how to configure OSPF over ISDN line so hello packets won't br
ing up the circuit. i think you can do "ip ospf demand circuit" inteface comman
d but i can't get it to work like that.
i'd appreciate any help
Andy
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