[c-nsp] ISDN backup for MPLS CE Router

[Masood Ahmad Shah]

I believe that you side is CE ---> PE. One thing is very important to know
that you must reach your PE in appropriate manners while connecting using
ISDN circuit.. 

If you want to use automatic failover and just can't run routing
protocols..you can use IPSLA monitor

If you can't use routing protocol your choice is IP SLA monitor.

How to IPSLA:

ip sla monitor 1
 type echo protocol ipIcmpEcho primary-link-reachable-ip source-ipaddr
switch-source-ip  timeout 1500  threshold 2000  frequency 3

Start Monitring:
ip sla monitor schedule 1 life forever start-time now

Tracking:

track 1 rtr 1 reachability

Secondary Route:
ip route 0.0.0.0 0.0.0.0  secondary-gateway track 1

Regards,
Masood Ahmad Shah


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Zitouni Rachid
Sent: Tuesday, January 22, 2008 8:45 PM
To: Ali, Rijas: BB UAE (IT); cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] ISDN backup for MPLS CE Router

Hi,

Use dialer watch:
http://www.cisco.com/en/US/tech/tk801/tk379/technologies_configuration_examp
le09186a0080094143.shtml  

On CE : you will need your default route to PE  to be suppressed when CE-PE
link fail somewhere => dynamic routing is the easier way to do it

Obviously, your Head Office CE will need to know that the link between
branch office CE and PE went down....

 

HiH

Rachid

 

________________________________

De : Ali, Rijas: BB UAE (IT) [mailto:rijas.ali at barclays.com] 
Envoyé : mardi 22 janvier 2008 14:34
À : Zitouni Rachid; cisco-nsp at puck.nether.net
Objet : RE: [c-nsp] ISDN backup for MPLS CE Router

 

 

The CE will have ISDN WIC and it should dial out to my Head Office  ISDN
Aggregator (Cisco 3845) when the default route from ISP is missing.

 

After this if at all there is a problem in MPLS cloud ( either ETH going
down / route missing )from service provider data will flow Via ISDN .

 

 

ALI RIJAS

 

-----Original Message-----
From: Zitouni Rachid [mailto:rzitouni at prosodie.com] 
Sent: Tuesday, January 22, 2008 5:19 PM
To: Ali, Rijas: BB UAE (IT); cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] ISDN backup for MPLS CE Router

 

Just to make sure I understand your topology :

ISDN will be CE-PE or CE-CE ?

 

 

-----Message d'origine-----

De : cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] De la part de Ali, Rijas: BB UAE
(IT)

Envoyé : mardi 22 janvier 2008 14:05

À : cisco-nsp at puck.nether.net

Objet : [c-nsp] ISDN backup for MPLS CE Router

 

 

Hi Friends,

 

Most of my branches connect to MPLS service provider using a ETH port on

my CE.

 

I am thinking of having a ISDN Backup for the MPLS VPN Link.

 

Since ETH its very rare that the interface go down, So I have to look

for the default route that ISP gives to my CE and if not available I

will have to start ISDN. 

 

Please help me with some of your experience or documentation.

 

ALI RIJAS

 

 

 

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The Barclays Group does not accept responsibility for any loss arising from
unauthorised access to, or interference with, any Internet communications by
any third party, or from the transmission of any viruses. Replies to this
e-mail may be monitored by the Barclays Group for operational or business
reasons.

Any opinion or other information in this e-mail or its attachments that does
not relate to the business of the Barclays Group is personal to the sender
and is not given or endorsed by the Barclays Group.

Barclays Bank PLC.Registered in England and Wales (registered no. 1026167).
Registered Office: 1 Churchill Place, London, E14 5HP, United Kingdom.

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