From: Greg Schmitt (gschmitt@xxxxxxxxxxxxx)
Date: Sat May 04 2002 - 13:16:59 GMT-3
Greetings,
For some reason, one of my biggest headaches with the lab was ISDN. It never se
emed to work the same two times in a row for me.
The OSPF demand circuit command you are using is supposed to keep the 224.0.0.5
multicast messages from initiating an ISDN call
unless there is a network change (new LSA). If your OSPF network is generating
new LSAs, then you will see the link go up and down.
However, if your network is steady, then the OSPF demand circuit command may no
t be functioning the way you want it to.
Here are some things you can try:
1. Only have one router be capable of initiating a call (only have one map stat
ement with the dialer number). Remove the OSPF demand
circuit from the dialing router, but leave it on the dialed router.
2. Same as above, but leave the OSPF demand circuit on the dialing router and r
emove it from the dialed router.
3. Try a different version of code (12.0 perhaps) with the configurations above
.
Good luck.
Greg
Greg Schmitt, CCIE #8105
Internetwork Solutions Engineer
ThruPoint, Inc.
Cell: 443-822-5183
Voice: 410-974-4337
e-mail: GSchmitt@thrupoint.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
elpingu
Sent: Saturday, May 04, 2002 11:41 AM
To: zapeta zape
Cc: ccielab@groupstudy.com
Subject: Re: ISDN 224.0.0.5 problem
224.0.0.5 is a multicast reserved for ospf ....so your routers are trying to
stablish adjecencies..because the link is broadcast ....
try removing the broadcast from the dialer map so that it can be a point-to
point interface
ping
zapeta zape wrote:
> Hello,
> I am having a problem with my isdn.For one the multicast address 224.0.0.5
> is bringing the link up. By the way I am not doing any redistribution.
> When I do sh ip osp neigh on R1, I don't see no neighbor id toward R2.
> When I apply the same command on R2, I see that R2 is try to establish a
> neighbor with R1. I already tried the no peer neighbor-route on both
> command. I tried to command deb ip ospf monitor I can't apply on my routers
> even I am running the 12.2 code.
> Any help will be appreciated.
> Thanks
> Zape
>
> R1
> username r2 password 0 cisco
> !
> interface BRI0/0
> ip address 150.10.35.1 255.255.255.252
> encapsulation ppp
> ip ospf priority 0
> ip ospf demand-circuit
> dialer map ip 150.10.35.2 name r2 broadcast 7704324217
> dialer-group 1
> isdn switch-type basic-ni
> isdn spid1 77043242400101 4324240
> cdapi buffers regular 0
> cdapi buffers raw 0
> cdapi buffers large 0
> ppp callback request
> ppp chap hostname cisco5
> !
> router ospf 100
> router-id 150.10.1.1
> log-adjacency-changes
>
> network 150.10.1.0 0.0.0.255 area 0
>
> network 150.10.35.0 0.0.0.3 area 0
> !
> dialer-list 1 protocol ip permit
>
> r2
>
> interface BRI0/0
> ip address 150.10.35.2 255.255.255.252
> no ip directed-broadcast
> encapsulation ppp
> ip ospf interface-retry 0
> ip ospf demand-circuit
> dialer idle-timeout 20
> dialer map ip 150.10.35.1 name r1 class ccie broadcast 7704324240
> dialer-group 1
> isdn switch-type basic-ni
> isdn spid1 77043242170101 4324217
> ppp callback accept
> ppp authentication chap
> !
> router ospf 100
> router-id 150.10.2.2
> log-adjacency-changes
>
> network 150.10.2.0 0.0.0.255 area 0
> network 150.10.35.0 0.0.0.3 area 0
>
> !
>
> map-class dialer ccie
> dialer callback-server username
> !
> dialer-list 1 protocol ip permit
>
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