From: Madhu NK (madhu_nk@xxxxxxxxxxx)
Date: Sun Dec 03 2000 - 10:14:53 GMT-3
Hi James,
Thanks for the explanation..please clarify why do you have that access-list
100 in the config even though i dont see it being applied....are you missing
anything here...thanks
madhu
From: James Chen <jr_chen@ringline.com.tw>
Reply-To: James Chen <jr_chen@ringline.com.tw>
To: CCIE Group Study (E-mail) <ccielab@groupstudy.com>, ªLª÷¥Í
<thomas@lantel.com.tw>
Subject: [A]OSPf Demand-Circuit over ISDN DDR
Date: Sun, 03 Dec 2000 16:06:15 +0800
Hello, everybody:
Finally, I got the config to work perfectly I think.
The scenario is R5 connect to R3 with ISDN, and only R5 will initial the
call to R3.
Configuration is so simple, my friend who is CCIE tell me that make it
simple,
don't think and do it too complex.
Do I decide to do it from isdn bri call setup and then add neighbor
relation and demand
circuit , finally to do the backbone configuartion, instead that config
backbone and then
backup by isdn .
1. I config ip , ppp, auth, dialer map, dialer-group, ping each other,
it's ok.
2. add router ospf , put network, add ip ospf demand-circuit , watch the
neighbor
relation become " FULL/- ", and the dead time become " -" at last.
And after the idle-timeout , the isdn disconnectted. Ya ! it's ok.
3.add all configuration of other backbone , it's still work properly.
4.save config and reload all routers, ya ! isdn will be disconnectted
after idle-timeout.
5.check if the backup is ok, shutdown the fa0/0 in R3 or R5, ya ! it
seems to be work.
6.After the idle-timeout, the isdn drop . however, one LSA generate and
trigger the isdn
up again, after 120s idle-timeout, isdn disconnected and pick up
again and again.
At first, I doublt that maybe I should use dialer interface to try it .
Ya, it work properly, but has the same condition as above.
I read the groupstudy email list , it said that use "no peer
neighbor-route".
But why should the peer neighbor-route be add ?
I use debug ip ospf lsa-generation to watch what LSA is be generatted !
Yeh, there is an OSPF external Type 5 route be generatted when the isdn
grop.
I think this is because the rip will advertise the bri network into
OSPF.
The route entry that RIP inject is exactly the host-route 137.1.35.2/32,
so if I use "no peer neighbor-route" , it will not generate the route "
137.1.35.2/32 "
and will not be the entry of RIP. So that when the isdn drop, the RIP
will not
adverise the entry into OSPF, so that " THE NETWORK TOPOLOGY WILL NOT
BE CHANGED", the isdn will not be trigger up.
If any other method can make the same function of "no peer
neighbor-route",
please let me know, thanks !
I begin to believe that all the solution of CCIE Lab should be nature
and simple.
Don't think too much, right ?
James
The exactly config I have is as following:
-------------------------------------------------------------------------------
---------
Dialer Profile
----------------
[R3]
hostname R3
!
enable password cisco
!
username R5 password 0 cisco
!
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-5ess
!
interface Loopback0
ip address 137.1.3.3 255.255.255.0
no ip directed-broadcast
!
interface FastEthernet0/0
ip address 137.1.63.3 255.255.255.0
no ip directed-broadcast
duplex auto
speed auto
!
interface Serial0/0
ip address 137.1.254.3 255.255.255.248
no ip directed-broadcast
encapsulation frame-relay
ip ospf network point-to-multipoint
no ip mroute-cache
no fair-queue
frame-relay map ip 137.1.254.2 101 broadcast
frame-relay map ip 137.1.254.4 100 broadcast
frame-relay lmi-type ansi
!
interface BRI0/0
no ip address
no ip directed-broadcast
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-5ess
ppp authentication pap
ppp pap sent-username R3 password 7 1414110209
!
interface Dialer1
ip address 137.1.35.1 255.255.255.252
no ip directed-broadcast
encapsulation ppp
dialer remote-name R5
dialer pool 1
dialer-group 1
!
router ospf 1
network 137.1.3.3 0.0.0.0 area 3
network 137.1.35.1 0.0.0.0 area 3
network 137.1.63.3 0.0.0.0 area 3
network 137.1.254.3 0.0.0.0 area 0
!
ip classless
!
access-list 100 permit ip host 137.1.35.1 any log
dialer-list 1 protocol ip permit
=======================================
[R5]
hostname R5
!
enable password cisco
!
username R3 password 0 ccie
!
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-5ess
!
interface Loopback0
ip address 137.1.5.5 255.255.255.0
no ip directed-broadcast
!
interface FastEthernet0/0
ip address 137.1.65.5 255.255.255.0
no ip directed-broadcast
duplex auto
speed auto
!
interface Serial0/0
ip address 137.1.15.5 255.255.255.0
no ip directed-broadcast
ip rip send version 2
no ip mroute-cache
clockrate 2000000
!
interface BRI0/0
no ip address
no ip directed-broadcast
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-5ess
ppp authentication pap
ppp pap sent-username R5 password 7 060506324F41
!
interface FastEthernet0/1
no ip address
no ip directed-broadcast
shutdown
duplex auto
speed auto
!
interface Dialer1
ip address 137.1.35.2 255.255.255.252
no ip directed-broadcast
encapsulation ppp
ip ospf demand-circuit
dialer remote-name R3
dialer pool 1
dialer string 8358661
dialer-group 1
no peer neighbor-route
!
router ospf 1
redistribute rip metric 1000 subnets
network 137.1.5.5 0.0.0.0 area 3
network 137.1.35.2 0.0.0.0 area 3
network 137.1.65.5 0.0.0.0 area 3
!
router rip
redistribute ospf 1
passive-interface FastEthernet0/0
passive-interface Dialer1
network 137.1.0.0
default-information originate
!
ip classless
!
access-list 100 permit ip host 137.1.35.2 any log
dialer-list 1 protocol ip permit
---------------------------------------------------------------
legacy DDR
--------------
[R3]
hostname R3
!
enable password cisco
!
username R5 password 0 cisco
!
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-5ess
!
interface Loopback0
ip address 137.1.3.3 255.255.255.0
no ip directed-broadcast
!
interface FastEthernet0/0
ip address 137.1.63.3 255.255.255.0
no ip directed-broadcast
duplex auto
speed auto
!
interface Serial0/0
ip address 137.1.254.3 255.255.255.248
no ip directed-broadcast
encapsulation frame-relay
ip ospf network point-to-multipoint
no ip mroute-cache
no fair-queue
frame-relay map ip 137.1.254.2 101 broadcast
frame-relay map ip 137.1.254.4 100 broadcast
frame-relay lmi-type ansi
!
interface BRI0/0
ip address 137.1.35.1 255.255.255.252
no ip directed-broadcast
encapsulation ppp
dialer map ip 137.1.35.2 name R5 broadcast
dialer-group 1
isdn switch-type basic-5ess
ppp authentication pap
ppp pap sent-username R3 password 7 1414110209
!
router ospf 1
network 137.1.3.3 0.0.0.0 area 3
network 137.1.35.1 0.0.0.0 area 3
network 137.1.63.3 0.0.0.0 area 3
network 137.1.254.3 0.0.0.0 area 0
!
ip classless
!
access-list 100 permit ip host 137.1.35.1 any log
dialer-list 1 protocol ip permit
[R5]
hostname R5
!
logging buffered 40960 debugging
enable password cisco
!
username R3 password 0 ccie
!
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-5ess
!
interface Loopback0
ip address 137.1.5.5 255.255.255.0
no ip directed-broadcast
!
interface FastEthernet0/0
ip address 137.1.65.5 255.255.255.0
no ip directed-broadcast
duplex auto
speed auto
!
interface Serial0/0
ip address 137.1.15.5 255.255.255.0
no ip directed-broadcast
ip rip send version 2
no ip mroute-cache
clockrate 2000000
!
interface BRI0/0
ip address 137.1.35.2 255.255.255.252
no ip directed-broadcast
encapsulation ppp
ip ospf demand-circuit
dialer map ip 137.1.35.1 name R3 broadcast 8358661
dialer-group 1
isdn switch-type basic-5ess
no peer neighbor-route
ppp authentication pap
ppp pap sent-username R5 password 7 060506324F41
!
router ospf 1
redistribute rip subnets
network 137.1.5.5 0.0.0.0 area 3
network 137.1.35.2 0.0.0.0 area 3
network 137.1.65.5 0.0.0.0 area 3
!
router rip
redistribute ospf 1
passive-interface FastEthernet0/0
passive-interface BRI0/0
network 137.1.0.0
default-information originate
!
ip classless
!
access-list 100 permit ip host 137.1.35.2 any log
dialer-list 1 protocol ip permit
<< jr_chen.vcf >>
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