From: Ed Lui (edwlui@gmail.com)
Date: Wed Apr 06 2005 - 01:50:54 GMT-3
I am just thinking out loud. Not sure if that will work in your case ?
R4
int BRI0
ip access-group INCOMING in
ip access-group OUTGOING out
ip access-list ext INCOMING
permit tcp any any reflect IN
permit udp any any reflect IN
permit icmp any any reflect IN
ip access-list ext OUTGOING
evaluate IN
Please comment,
Edward Lui
On Apr 5, 2005 7:40 PM, Ian Henderson <ianh@chime.net.au> wrote:
> Hi all,
>
> I'm working through IEWB lab 2, and have some questions on callback and
> PPP. They look like simple enough questions, but I can't find answers
> googling around.
>
> - The callback link comes up from R4 to R5 and the peers authenticate, but
> without a dialer-group configured on R4, all traffic is marked as
> uninteresting and discarded. Cisco's answer to this is add a
> dialer-group and remove the phone number from the dialer-map. This won't
> work with PPP callback though. How do I create a dialer-group that
> allows traffic to the other peer, but won't bring up the link?
>
> - If both peers were authenticating CHAP bidirectionally, both routers
> would see the peer hostname in 'show isdn active' or 'show users'. But
> when R5 isn't authenticating R4, it doesn't see the remote hostname.
> This means the router can't find the correct dialer-map. How do you
> specify which dialer-map to use when the discriminator ('name ROUTER4')
> isn't available?
>
> R4:
> interface BRI0/0
> ip address 132.1.45.4 255.255.255.248
> ip router isis
> encapsulation ppp
> dialer idle-timeout 0
> dialer map clns 49.0044.0001.0001.0005.00 name ROUTER5 class CALLBACK broadcast 9325xxxx
> dialer map ip 132.1.45.5 name ROUTER5 class CALLBACK broadcast 9325xxxx
> isdn switch-type basic-net3
> isdn answer1 9325yyyy
> isdn answer2 9325yyyy
> ppp callback accept
> ppp authentication chap
> ppp chap hostname ROUTER4
> isis circuit-type level-2-only
>
> R5:
> interface BRI0/0
> ip address 132.1.45.5 255.255.255.248
> ip router isis
> encapsulation ppp
> dialer map clns 49.0044.0001.0001.0004.00 name ROUTER4 broadcast 9325yyyy
> dialer map ip 132.1.45.4 name ROUTER4 broadcast 9325yyyy
> dialer-group 1
> isdn switch-type basic-net3
> isdn answer1 9325xxxx
> isdn answer2 9325xxxx
> ppp callback request
> ppp chap hostname ROUTER5
> isis circuit-type level-2-only
>
> Thanks,
>
> - I.
>
> --
> Ian Henderson CCNA, CCNP
> Senior Network Engineer
>
> iiNet Limited
> Chime Communications Pty Ltd
>
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