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Community Member

Dialer Watch

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

7 REPLIES
Silver

Re: Dialer Watch

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:

http://www.cisco.com/en/US/tech/tk801/tk133/technologies_tech_note09186a008009457d.shtml#floating_static_routes

Hope this helps

Regards

Andrea

Community Member

Re: Dialer Watch

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.

Community Member

Re: Dialer Watch

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

Community Member

Re: Dialer Watch

Hi rajesh:

Please add this command

dialer watch-disable inside dialer watch command set.

Applies a disable time to the interface.

Hope this will work.

Sandipani C

Community Member

Re: Dialer Watch

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

Community Member

Re: Dialer Watch

Hi Rajesh:

ya you can go with dialer watch..

Bye

Sandipani

Community Member

Re: Dialer Watch

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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