From: gladston@br.ibm.com
Date: Fri Jul 15 2005 - 09:51:29 GMT-3
Hi Andy,
It seems you are missing 'dialer-group x' on R6.
When serial 0/0 goes down on R6, dialer interface goes up. But this not
mean you have an ISDN connection. It is the second part, when interesting
traffic start the call.
Also, if this is not the case and you have dialer-group (it just is not on
your post) IOS has strange behavior somethimes, you know. Could you test
originating packets from a router connected to R6, instead originating on
R6?
I just tested this after you email, and it works:
interface Dialer200
description testar dialer load-trheshold only on R5
ip address 100.5.45.6 255.255.255.252
encapsulation ppp
load-interval 30
dialer pool 200
dialer remote-name Rack2R4
dialer string 4441111111
dialer-group 1
no peer neighbor-route
no cdp enable
ppp authentication chap
This site has examples of backup:
http://www.cisco.com/warp/public/125/19.pdf
(I must thank you. I was in doubt if dialer-group was necessary when
configuring backup; testing shows it really is necessary; on the other
hand, when using dialer-watched, dialer-group is not necessary)
Cordially,
------------------------------------------------------------------
Alaerte Gladston Vidali
IBM Global Services - SO
Tel.55+11+2121-2879 Fax:55+11+2121-2449
"Andy" <trung@vnsystem.net>
15/07/2005 00:48
To
Alaerte Gladston Vidali/Brazil/IBM@IBMBR, "DaveW" <kapsi1911@hotmail.com>
cc
<ccielab@groupstudy.com>
Subject
Re: ISDN - default route
I have tested this scenario with dialer profile but there's no difference.
interface dialer up when primary link (s0) down -> default route is in
routing table but here is the output from debug ip packet:
Router6#p 10.0.0.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router6#
00:55:12: IP: s=10.0.0.6 (local), d=10.0.0.8 (Dialer0), len 100, sending
00:55:12: IP: s=10.0.0.6 (local), d=10.0.0.8 (Dialer0), len 100,
encapsulation failed
00:55:14: IP: s=10.0.0.6 (local), d=10.0.0.8 (Dialer0), len 100, sending
00:55:14: IP: s=10.0.0.6 (local), d=10.0.0.8 (Dialer0), len 100,
encapsulation failed
00:55:16: IP: s=10.0.0.6 (local), d=10.0.0.8 (Dialer0), len 100, sending
Have you guys tested this successfully ?
here is my config:
Router6:
interface Serial0
backup delay 5 5
backup interface Dialer0
ip address 100.0.0.6 255.255.255.0
encapsulation frame-relay
frame-relay map ip 100.0.0.8 608 broadcast
no frame-relay inverse-arp
!
interface BRI0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-ni
isdn spid1 66612345
isdn spid2 66654321
isdn x25 static-tei 0
cdapi buffers regular 0
cdapi buffers raw 0
cdapi buffers large 0
!
interface Dialer0
ip address 10.0.0.6 255.255.255.0
encapsulation ppp
dialer pool 1
dialer string 666111
!
ip route 0.0.0.0 0.0.0.0 10.0.0.8
----------------------------
Router8:
interface Serial0
ip address 100.0.0.8 255.255.255.0
encapsulation frame-relay
frame-relay map ip 100.0.0.6 806 broadcast
no frame-relay inverse-arp
!
interface BRI0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-ni
isdn spid1 88812345
isdn spid2 88854321
cdapi buffers regular 0
cdapi buffers raw 0
cdapi buffers large 0
!
interface Dialer0
ip address 10.0.0.8 255.255.255.0
encapsulation ppp
dialer pool 1
dialer string 666111
Andy
----- Original Message -----
From: <gladston@br.ibm.com>
To: "DaveW" <kapsi1911@hotmail.com>
Cc: <ccielab@groupstudy.com>
Sent: Tuesday, June 28, 2005 6:31 AM
Subject: Re: ISDN - default route
> Thanks Dave,
>
> I tried it. Does not work for legacy. The first part works (while main
> serial is up, bri0/0 is down and default ip route is not on RIB. But
when
> main serial goes down, I got an encapsulation failure for most of the
> destination, because on the remote bri address is solved by dialer map.
>
> I tested it for dialer profile, but I remember I made a mistake. I did
not
> change backup interface bri0/0 to backup interface dialer 200. I will
try
> this tomorrow morning.
> I think this will work, as dialer 200 will be down, so ip route will be
> removed from RIB. And, as dialer is point-to-point, there will be no map
> problem.
>
>
> Cordially,
> ------------------------------------------------------------------
> Gladston
>
>
>
>
> "DaveW" <kapsi1911@hotmail.com>
> 27/06/2005 18:33
>
> To
> Alaerte Gladston Vidali/Brazil/IBM@IBMBR, <ccielab@groupstudy.com>
> cc
>
> Subject
> Re: ISDN - default route
>
>
>
>
>
>
> Gladston,
>
> Try this. Create a default static route that points to Bri0/0. Then put
a
> "backup interface bri0/0" configuration on serial/0. Since this will put
> bri0/0 standby/down state, I would think the default route would be
> suppressed until ser0/0 goes down and the bri0/0 interface is returned
to
> an
> up/up state. I haven't tested it, but I don't see why it wouldn't work.
>
> DAve
> ----- Original Message -----
> From: <gladston@br.ibm.com>
> To: <ccielab@groupstudy.com>
> Sent: Monday, June 27, 2005 3:31 PM
> Subject: ISDN - default route
>
>
>> How would you configure a default route pointing to ISDN so it is on
the
> RIB only when the main interface is down?
>>
>> I tried pointing to physical BRI (ip route ...bri0/0), but I get an
> encapsulation failed for the addresses not mapped under bri (dialer map
> ip...)
>>
>> I tried pointing to Dialer (ip route...dialer 200), but the default
> route
> is always on the RIB in this case.
>>
>> I tried pointing to the remote IP of the ISDN (ip route 172.16.45.5),
> but
> the default route is always on the RIB in this case either.
>>
>> Tested using legacy with this config:
>>
>> interface BRI0/0
>> description testar dialer load-trheshold only on R5
>> ip address 172.16.45.6 255.255.255.252
>> encapsulation ppp
>> dialer map ip 172.16.45.5 name Rack2R4 broadcast 4441111111
>> dialer-group 1
>> isdn switch-type basic-ni
>> isdn spid1 555111111100
>> isdn spid2 555222222200
>> no cdp enable
>> ppp authentication chap
>> ppp multilink
>>
>>
>> Testing using dialer profile with this config:
>>
>> interface BRI0/0
>> no ip address
>> encapsulation ppp
>> dialer pool-member 200
>> isdn switch-type basic-ni
>> isdn spid1 555111111100
>> isdn spid2 555222222200
>> ppp authentication chap
>> ppp multilink
>>
>>
>> interface Dialer200
>> description testar dialer load-trheshold only on R5
>> ip address 172.16.45.6 255.255.255.252
>> encapsulation ppp
>> dialer pool 200
>> dialer remote-name Rack2R4
>> dialer string 4441111111
>> dialer-group 1
>> no cdp enable
>> ppp authentication chap
>> ppp multilink
>>
>> _______________________________________________________________________
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>
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