06-28-2006 05:01 AM - edited 03-03-2019 01:09 PM
Hi all,
I am using ISDN as the backup for primary DSL line. I am plainning to use dialer watch to get the secondary line up when the primary link goes down. My edge router is configured with EIGRP for routing purpose.
So, what is the best practise like, do i need to add the secondary link's IP in EIGRP or is it acceptable to add the scondary link as a floating static route. Some one let me know which is the best practise to be followed.
Thanks
Rajesh
06-28-2006 05:47 AM
Hi,
with dialer watch it depends on what you have to "watch" on dialer watch-list
Example:
your spoke LAN subnet is 192.168.90.x/24
your hub LAN subnet is 192.168.30.x/24
the ISDN p2p subnet is 192.168.71.28/30
conf like that:
!
!
interface BRI0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type xxxx
isdn static-tei 0
no cdp enable
ppp authentication chap
!
interface Dialer0
ip address 192.168.71.30 255.255.255.252
encapsulation ppp
dialer pool 1
dialer remote-name xxxxx
dialer string xxxxxx
dialer watch-group 2
dialer-group 1
ppp authentication chap
!
router eigrp 100
network 192.168.0.0 0.0.255.255
no auto-summary
!
ip route 192.168.30.0 255.255.255.0 Dialer0 254
!
access-list 101 deny eigrp any any
access-list 101 permit ip any any
dialer watch-list 2 ip 192.168.30.0 255.255.255.0
dialer watch-list 2 delay route-check initial 180
dialer watch-list 2 delay connect 30
dialer watch-list 2 delay disconnect 90
dialer-list 1 protocol ip list 101
!
!
more infos:
Hope this helps
Regards
Andrea
06-28-2006 11:21 AM
Hi :
You can advertise in EIGRP, and declare the watched network in Dialer map command. But no need to add static route for that you can advertise the BRI ineterface in EIGRP.
it is like this : as an example.
interface bri0
! This is the secondary backup line
ip address 7.1.1.2 255.255.255.0
encapsulation ppp
dialer idle-timeout 5
! Use a dialer map for the IP address/network which is the same network as
! being watched.
dialer map ip 3.1.1.0 name remote router & primary link. 60079 broadcast
! Add a dialer map for remote end's IP address to make routing work over this interface.
dialer map ip 7.1.1.3 60079 broadcast
dialer-group 1
! Enable Dialer Watch on this interface.
dialer watch-group 1
ppp authentication chap
Regards
sandipani C
Network Admin Wipro technologies.
06-28-2006 06:28 PM
Hi there,
Remote Sites
~~~~~~~~~~~~
interface BRI0/2/0
no ip address
encapsulation ppp
load-interval 30
dialer pool-member 2
isdn switch-type basic-net3
isdn send-alerting
ppp authentication chap
interface Dialer101
ip address 172.90.10.X 255.255.255.252
encapsulation ppp
dialer pool 2
dialer remote-name core_rtr
dialer string XXXXXXXXX
dialer watch-group 1
dialer-group 2
no cdp enable
router eigrp 76
redistribute connected
network 10.0.0.0
router eigrp 1
redistribute connected
network 172.90.0.0
ip route 0.0.0.0 0.0.0.0 172.90.10.X 200
ip route 172.90.10.X 255.255.255.255 BRI0/1/0 200
access-list 150 deny eigrp any any
access-list 150 permit ip any any
dialer watch-list 1 ip 10.1.0.0 255.255.0.0
dialer watch-list 1 ip 172.28.0.0 255.255.0.0
dialer watch-list 1 ip 10.160.0.0 255.255.0.0
dialer watch-list 1 delay route-check initial 180
dialer watch-list 1 delay connect 30
dialer watch-list 1 delay disconnect 90
dialer-list 1 protocol ip permit
dialer-list 2 protocol ip list 150
Core Router
~~~~~~~~~~~
router eigrp 1
network 172.90.0.0
The above is the configs which i used for Dialer Watch.
I am using 2 eigrp tables since, 2 core routers are found in the central office one for all DSL connections with EIGRP Autnomous no 72 and one for backup PRI links with Autnomous no 1.
The problem is, the ISDN backup fires up as soon as DSL line comes down. But once when the primary link comes up, the secondary link is also up inveriably and does not comes down even after certain period of time unless the line is physically pulled.
Is there any flaw in my above configs. Do i need to add any extra set of configs ???
Regards
Rajesh
06-28-2006 06:47 PM
Hi rajesh:
Please add this command
dialer watch-disable
Applies a disable time to the interface.
Hope this will work.
Sandipani C
06-29-2006 03:38 AM
Hi Sandipani
I am going to try this tonight and let you know how it goes. Thank you very much for all u r help.
Which is good or best practice for dial backup. Dialer watch or Dialer map ?? Since, i came across many documents and in some they mention Dialer watch is good, but without any good illustration. So, can some one suggest which is the best, dialer watch or dial map???
Rajesh
06-29-2006 06:26 PM
Hi Rajesh:
ya you can go with dialer watch..
Bye
Sandipani
06-30-2006 01:27 AM
Hi Sandipani,
I can enter the commadn, in bri 0/2/0 or in dialer interfaces.
I am also getting an error message like
Jun 30 09:32:44.852: ASSERTION FAILED: file "../chips/gt96k/gt96k_timer.c", lin
e 771
D't know what is the real cause of this message.
If u have any idea plz let me know.
Thanks for all u r help.
Rajesh
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