From: Carlos G Mendioroz (tron@xxxxxxxxxxx)
Date: Mon Jul 08 2002 - 17:28:39 GMT-3
No, it's not. Actually, you should not, or else will prevent it from
working (sometimes).
After seting the interface for demand-circuit, you should see in
the interface that hellos are suppressed.
Anthony Pace wrote:
>
> Is it necessary to deny the OSPF traffic in the dialer-list? Does that
> even let the Demand-Circuit bring it up? I would think making the ISDN
> a demand circuit takes the place of filtering the hello's on the link.
> Is that wrong?
>
> Anthony Pace
>
> On Mon, 08 Jul 2002 17:00:56 -0300, "Carlos G Mendioroz"
> <tron@huapi.ba.ar> said:
> > Danny,
> > Short answer: fix the ospf cost of your ddr interfaces (via ip ospf
> > cost).
> >
> > If you take a closer look, you should see that hellows are supressed
> > for
> > the
> > DDR interfaces. The link is being set because of an LSU triggered by a
> > change in
> > cost of the link.
> >
> > HTH
> >
> > Danny.Wang@alderwoods.com wrote:
> > >
> > > Very simple scenario. R1 connected to R2 with both ISDN and Ethernet.
> > >
> > > Requiment:
> > >
> > > 1. Configure OSPF for the network
> > > 2. Do not allow OSPF hello to keep the ISDN link up indefinitely
> > > 3. The ISDN line should only come up when the ethernet connections failed
> > >
> > > But after i enable the 'ip ospf demand circuit' on the dialer interface
> > > (one side only), the link still constantly up and down, just wonderring i
f
> > > i missed something or it's a Teltone simulator "bug" ;-j
> > >
> > > When i enable debuy ip packet and dialer packet, it shows the dialer caus
ed
> > > by hello packet, source ip address from dialer 1 to 224.0.0.5 ).
> > >
> > > when i modified the dialer-list on the R1, it's stopped, and leaving R2 a
s
> > > is
> > >
> > > dialer list 1 protocol list 100
> > > access-list 100 deny ospf any any
> > > access-list 100 permit ip any any
> > >
> > > Any advice?
> > >
> > > R1------ISDN-------R2
> > > \ /
> > > \ /
> > > Ethernet
> > >
> > > r1# sh run
> > >
> > > Building configuration...
> > >
> > > Current configuration : 1551 bytes
> > > !
> > > version 12.1
> > > no service single-slot-reload-enable
> > > service timestamps debug uptime
> > > service timestamps log uptime
> > > no service password-encryption
> > > !
> > > hostname r1
> > > !
> > > !
> > > username CCIE2 password 0 cisco
> > > username r2 password 0 cisco
> > > !
> > > !
> > > !
> > > !
> > > ip subnet-zero
> > > no ip domain-lookup
> > > !
> > > ip audit notify log
> > > ip audit po max-events 100
> > > isdn switch-type basic-ni
> > > !
> > > !
> > > !
> > > !
> > > !
> > > !
> > > !
> > > interface Loopback0
> > > ip address 10.10.11.1 255.255.255.255
> > > !
> > > interface Loopback1
> > > ip address 10.10.12.1 255.255.255.255
> > > !
> > > interface Loopback2
> > > ip address 10.10.13.1 255.255.255.255
> > > !
> > > interface Ethernet0/0
> > > no ip address
> > > shutdown
> > > !
> > > interface Serial0/0
> > > no ip address
> > > shutdown
> > > no fair-queue
> > > !
> > > interface BRI0/0
> > > no ip address
> > > encapsulation ppp
> > > dialer pool-member 1
> > > isdn switch-type basic-ni
> > > isdn spid1 0835866101 8358661
> > > isdn spid2 0835866301 8358663
> > > ppp authentication chap
> > > ppp multilink
> > > !
> > > interface Ethernet0/1
> > > ip address 192.168.1.211 255.255.255.0
> > > !
> > > interface Dialer1
> > > ip address 172.19.1.6 255.255.255.252
> > > encapsulation ppp
> > > ip ospf demand-circuit
> > > dialer pool 1
> > > dialer remote-name CCIE2
> > > dialer string 8358662
> > > dialer-group 1
> > > ppp authentication chap
> > > ppp chap hostname CCIE1
> > > ppp multilink
> > >
> > > !
> > > router ospf 64
> > > log-adjacency-changes
> > > network 10.10.11.1 0.0.0.0 area 0
> > > network 10.10.12.1 0.0.0.0 area 1
> > > network 10.10.13.1 0.0.0.0 area 2
> > > network 172.19.1.4 0.0.0.3 area 0
> > > network 192.168.1.0 0.0.0.255 area 0
> > > !
> > > ip classless
> > > ip http server
> > > ip ospf name-lookup
> > > !
> > > dialer-list 1 protocol ip permit
> > > !
> > > !
> > > alias exec r show run
> > > alias exec c conf t
> > > !
> > > line con 0
> > > exec-timeout 0 0
> > > line aux 0
> > > line vty 0 4
> > > login
> > > !
> > > end
> > >
> > > r2#sh run
> > > Building configuration...
> > >
> > > Current configuration : 1627 bytes
> > > !
> > > version 12.1
> > > no service single-slot-reload-enable
> > > service timestamps debug uptime
> > > service timestamps log uptime
> > > no service password-encryption
> > > !
> > > hostname r2
> > > !
> > > logging buffered 10000 debugging
> > > !
> > > username CCIE1 password 0 cisco
> > > username r1 password 0 cisco
> > > !
> > > !
> > > !
> > > !
> > > ip subnet-zero
> > > no ip domain-lookup
> > > !
> > > isdn switch-type basic-ni
> > > !
> > > !
> > > !
> > > !
> > > !
> > > !
> > > !
> > > interface Loopback0
> > > ip address 10.10.11.2 255.255.255.255
> > > !
> > > interface Loopback1
> > > ip address 10.10.12.2 255.255.255.255
> > > !
> > > interface Loopback2
> > > ip address 10.10.13.2 255.255.255.255
> > > !
> > > interface Ethernet0/0
> > > no ip address
> > > shutdown
> > > !
> > > interface Serial0/0
> > > no ip address
> > > shutdown
> > > no fair-queue
> > > !
> > > interface BRI0/0
> > > no ip address
> > > encapsulation ppp
> > > dialer pool-member 1
> > > isdn switch-type basic-ni
> > > isdn spid1 0835866201 8358662
> > > isdn spid2 0835866401 8358664
> > > ppp authentication chap
> > > ppp multilink
> > > !
> > > interface Ethernet0/1
> > > backup delay 2 2
> > > backup interface Dialer1
> > > ip address 192.168.1.212 255.255.255.0
> > > !
> > > interface Dialer1
> > > ip address 172.19.1.5 255.255.255.252
> > > encapsulation ppp
> > > dialer pool 1
> > > dialer remote-name CCIE1
> > > dialer string 8358661
> > > dialer load-threshold 128 either
> > > dialer-group 1
> > > ppp authentication chap
> > > ppp chap hostname CCIE2
> > > ppp multilink
> > > !
> > > router ospf 64
> > > log-adjacency-changes
> > > network 10.10.11.2 0.0.0.0 area 0
> > > network 10.10.12.2 0.0.0.0 area 12
> > > network 10.10.13.2 0.0.0.0 area 13
> > > network 172.19.1.4 0.0.0.3 area 0
> > > network 192.168.1.0 0.0.0.255 area 0
> > > !
> > > ip classless
> > > ip http server
> > > !
> > > dialer-list 1 protocol ip permit
> > > !
> > > !
> > > alias exec r show run
> > > alias exec c conf t
> > >
> > > line con 0
> > > exec-timeout 0 0
> > > line aux 0
> > > line vty 0 4
> > > login
> > > !
> > > end
> > >
> > > Debug output:
> > >
> > > 00:44:45: IP: s=192.168.1.211 (local), d=224.0.0.5 (Ethernet0/1), len 68,
> > > sendin
> > > g broad/multicast
> > > 00:44:49: IP: s=192.168.1.212 (Ethernet0/1), d=224.0.0.5, len 68, rcvd 0
> > > 00:44:54: IP: s=172.19.1.6 (local), d=224.0.0.5 (Dialer1), len 64, sendin
g
> > > broad
> > > /multicast
> > > 00:44:54: Di1 DDR: ip (s=172.19.1.6, d=224.0.0.5), 64 bytes, outgoing
> > > interestin
> > > g (ip PERMIT)
> > > 00:44:54: IP: s=172.19.1.6 (local), d=224.0.0.5 (BRI0/0), len 64,
> > > encapsulation
> > > failed
> > > 00:44:55: IP: s=192.168.1.211 (local), d=224.0.0.5 (Ethernet0/1), len 68,
> > > sendin
> > > g broad/multicast
> > > 00:44:55: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to up
> > > 00:44:55: %DIALER-6-BIND: Interface BR0/0:1 bound to profile Di1
> > > 00:44:56: %ISDN-6-CONNECT: Interface BRI0/0:1 is now connected to 8358662
> > > 00:44:56: %ISDN-6-DISCONNECT: Interface BRI0/0:1 disconnected from 83586
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