Re: OSPF Demand Circuit

From: Stephen Oliver (stevie_oliver@xxxxxxxxxxx)
Date: Fri Jan 11 2002 - 06:52:22 GMT-3


   
He has no peer neighbor-route on the dialers.

Deny the dialer interface ip address being redistributed into OSPF with a
route-map in the redistribution command. I've come across this before.
Even though you have passived the dialer for IGRP the /32 address is still
being redistributed into OSPF.

Because you are running a classful protocol on one side of the router and
OSPF on the other and they use the same major network the dialer interface
ip address is being redistributed into the OSPF domain as a /32 external
route. It dissapears when the circuit goes down so thats a change and the
circuit comes up again. The /32 appears until the circuitgoes down then it
bounces.

This issue would not occur if the isdn circuit was on a different major
network from the IGRP one ie. 133.1.0.0

Stevie.

>From: Rajeev Siddappa <raj_lab@yahoo.com>
>Reply-To: Rajeev Siddappa <raj_lab@yahoo.com>
>To: EA Louie <elouie@yahoo.com>, ccielab@groupstudy.com
>Subject: Re: OSPF Demand Circuit
>Date: Fri, 11 Jan 2002 00:56:12 -0800 (PST)
>
>Use the command,
>
>No peer neighbor-route
>
>on the R5's bri interface.
>
>Then it should be ok.
>
>Rajeev.
>
>
>
>
>
>
>
>
>
>--- EA Louie <elouie@yahoo.com> wrote:
> > Okay... I think I've done everything right, I've
> > gone through the archives,
> > and I might just be dealing with a 'feature' of
> > 12.1, but I can't get ospf
> > demand circuit to stay quiet. here's the topology
> > in a nutshell:
> >
> > R2 ----- R5 ---- R4
> > /
> > R3 -/
> >
> > With R3 and R2 on the same subinterface as R5 in
> > Area 0, and R5-R4 running
> > IGRP
> > Mutually redistributing OSPF and EIGRP on R2, and
> > OSPF and IGRP on R5. R4
> > runs IGRP by itself.
> >
> > R5 and R3 are both ISDN routers and I'm trying to
> > get demand circuit working
> > correctly. I have it dialing just fine, but the
> > doggone connection won't stay
> > down unless I A) remove redistribution on R5, or B)
> > shut down the dialer
> > interface.
> >
> > Here are the configs of the 3 key routers - anyone
> > have a suggestion as to why
> > I can't get this thing quiet? I'm willing to put an
> > access-list on R5 to deny
> > ospf any any, but that just seems to defeat the
> > purpose, don't you think?
> > Especially when show ip ospf int dial0 shows Hello
> > suppressed:
> >
> > R5#sh ip ospf int dial0
> > Dialer0 is up, line protocol is up (spoofing)
> > Internet Address 133.1.35.5/24, Area 0
> > Process ID 1, Router ID 133.1.5.5, Network Type
> > POINT_TO_POINT, Cost: 20000
> > Configured as demand circuit.
> > Run as demand circuit.
> > DoNotAge LSA allowed.
> > Transmit Delay is 1 sec, State POINT_TO_POINT,
> > Timer intervals configured, Hello 10, Dead 40, Wait
> > 40, Retransmit 5
> > Hello due in 00:00:06
> > Index 3/3, flood queue length 0
> > Next 0x0(0)/0x0(0)
> > Last flood scan length is 1, maximum is 4
> > Last flood scan time is 0 msec, maximum is 16 msec
> > Neighbor Count is 1, Adjacent neighbor count is 1
> > Adjacent with neighbor 133.1.3.3 (Hello suppressed)
> > Suppress hello for 1 neighbor(s)
> > Message digest authentication enabled
> > Youngest key id is 1
> > R5#
> >
> >
> >
> > thanks
> > -e-
> >
> > R5
> >
> > R5#
> > 10:33:37: %ISDN-6-CONNECT: Interface BRI0:1 is now
> > connected to 5552000
> > user33
> > R5#wr t
> > Building configuration...
> > Current configuration : 4151 bytes
> > !
> > version 12.1
> > service timestamps debug uptime
> > service timestamps log uptime
> > no service password-encryption
> > !
> > hostname R5
> > !
> > enable password cisco
> > !
> > username R3 password 0 cisco
> > username user33 password 0 cisco
> > username user55 password 0 cisco
> > !
> > !
> > !
> > !
> > ip subnet-zero
> > ip tcp synwait-time 5
> > no ip domain-lookup
> > !
> > ipx routing 5000.5000.5000
> > isdn switch-type basic-dms100
> > !
> > !
> > !
> > !
> > !
> > interface Loopback0
> > ip address 133.1.5.5 255.255.255.0
> > ip ospf network point-to-point
> > !
> > interface Serial0
> > no ip address
> > encapsulation frame-relay
> > no fair-queue
> > no frame-relay inverse-arp
> > !
> > interface Serial0.1 point-to-point
> > ip address 133.1.45.5 255.255.255.0
> > ipx network 45
> > frame-relay interface-dlci 524
> > !
> > interface Serial0.235 multipoint
> > ip address 133.1.235.5 255.255.255.0
> > ip ospf message-digest-key 1 md5 cisco
> > ip ospf hello-interval 50
> > ipx network 235
> > frame-relay map ipx 235.3000.300
> > 10:34:04: %SEC-6-IPACCESSLOGRP: list 150 permitted
> > ospf 133.1.35.5 ->
> > 224.0.0.5,
> > 8 packets0.3000 523 broadcast
> > frame-relay map ipx 235.2000.2000.2000 522 broadcast
> > frame-relay map ip 133.1.235.2 522 broadcast
> > frame-relay map ip 133.1.235.3 523 broadcast
> > !
> > interface Serial1
> > ip address 133.1.56.5 255.255.255.0
> > encapsulation frame-relay
> > ip ospf network point-to-point
> > ipx network 56
> > frame-relay map ip 133.1.56.6 526 broadcast
> > frame-relay map ipx 56.6000.6000.6000 526 broadcast
> > no frame-relay inverse-arp
> > !
> > interface TokenRing0
> > description VLAN B
> > ip address 133.1.55.5 255.255.255.0
> > ipx network 55
> > ring-speed 16
> > !
> > interface BRI0
> > no ip address
> > encapsulation ppp
> > dialer pool-member 1
> > isdn switch-type basic-dms100
> > isdn spid1 0555100001 5551000
> > isdn spid2 0555300001 5553000
> > ppp authentication chap
> > ppp multilink
> > !
> > interface Dialer0
> > ip address 133.1.35.5 255.255.255.0
> > encapsulation ppp
> > ip ospf message-digest-key 1 md5 dialer
> > ip ospf network point-to-point
> > ip ospf cost 20000
> > ip ospf demand-circuit
> > dialer pool 1
> > dialer remote-name user33
> > dialer string 5552000
> > dialer load-threshold 127 either
> > dialer watch-group 1
> > dialer-group 1
> > no peer neighbor-route
> > ppp authentication chap
> > ppp chap hostname user55
> > ppp multilink
> > !
> > router ospf 1
> > log-adjacency-changes
> > area 0 authentication message-digest
> > area 5 virtual-link 133.1.6.6 authentication
> > message-digest
> > area 5 virtual-link 133.1.6.6 message-digest-key 1
> > md5 cisco
> > network 133.1.5.0 0.0.0.255 area 0
> > network 133.1.35.0 0.0.0.255 area 0
> > network 133.1.56.0 0.0.0.255 area 5
> > network 133.1.235.0 0.0.0.255 area 0
> > neighbor 133.1.235.3
> > neighbor 133.1.235.2
> > default-metric 20
> > !
> > router igrp 1
> > redistribute ospf 1 route-map ospf2igrp
> > passive-interface BRI0
> > passive-interface Dialer0
> > passive-interface Loopback0
> > passive-interface Serial0.235
> > passive-interface Serial1
> > passive-interface TokenRing0
> > network 133.1.0.0
> > default-metric 64 1 255 1 1500
> > !
> > ip classless
> > ip http server
> > !
> >
>=== message truncated ===
>
>



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