02-18-2008 05:09 AM - edited 03-03-2019 08:45 PM
Hi,
The customer is looking for failover link support for primary link on MPLS. WE are looking for ISDN and ethernet as a backup medium. Kindly see if the same can work.I have advanced IP services IOS on the router.
My query is that for the backup, do I need to involve the MPLS service provider to provide backup or can I provide backup link without the help of MPLS service provider.
Thanks in advance
Puneet
Solved! Go to Solution.
02-19-2008 12:22 AM
hi puneet
So now you can create a dialer group for your clinet on your ras. When the primary link fails the isdn will be intiated and the call comes to the ras after that it will be autheticated and foradd to the LNS and a L2 session will be intiatd for the same. Now you ca create a pool for the clinet on the ras when it gets authenticated it will get the ip from the pool and there shold be a loopback which is part of the vrf. In this way the communication will be possible. If you need configs please let me know i can forward the configs too Or you want to try at your end first.
regards
shivlu
02-18-2008 05:13 AM
No you can go without that. why donot you use the isdn for PSTN for dialing to your isp ras.
regards
shivlu
02-18-2008 10:08 PM
Hi, thanks for replying
Just o brief you about the case, i ave two loacation A(central) and B(remote).A is connected to 5 other sites including B on serial link via MPLS service provider. I want to have a backup link in site B such that If my primary link on MPLS fails in site B, my backup link on ISDN fires up in site B. The problem seems that although the call is being fired from site B to site A, the return traffic does not comes back as the primary route to site B is via serial link (MPLS).
let me know if there is a way to make this work.
Thanks in advance
Puneet.
02-18-2008 07:55 PM
hi puneet
do provide more info on what kinda primary connectivity you have and the capacity of the primary link and whats the main idea behind going on for the backup.
are you planning this backup at your central location or branch location.
typically branch locations you can consider a isdn as backup based on the user requirements and no of users in each branch.
if its for a central location then you need to think off a high capactiy backup link so taht you can serve your branch location without any service disruptions.
Its always better to involve/include your ISP in availing the backup service which mite cost you lesser than what you might end up in paying for your own backup link (point to point)...
regds
02-18-2008 10:10 PM
Hi, thanks for replying
Just o brief you about the case, i ave two loacation A(central) and B(remote).A is connected to 5 other sites including B on serial link via MPLS service provider. I want to have a backup link in site B such that If my primary link on MPLS fails in site B, my backup link on ISDN fires up in site B. The problem seems that although the call is being fired from site B to site A, the return traffic does not comes back as the primary route to site B is via serial link (MPLS).
let me know if there is a way to make this work.
Thanks in advance
Puneet.
02-18-2008 10:26 PM
Hi
Is your primary link getting termianted onto an ethernet port ?
if possible can you post the config of your site B?
when the isdn is connected did u check out for the availability of the ip route in your router at site B?
regds
02-18-2008 11:43 PM
hi,
the primary link is on wic-1t connected to mpls cloud.
i am sending the config
runn
Building configuration...
Current configuration : 1865 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname xxx-Fxx-RTR01
!
boot-start-marker
boot-end-marker
!
enable secret xxx
!
no aaa new-model
ip cef
!
!
!
!
multilink bundle-name authenticated
isdn switch-type basic-net3
archive
log config
hidekeys
class-map match-any interactive_av
match access-group name interactive_av
policy-map child
class interactive_av
priority 384
class class-default
bandwidth 128
queue-limit 512
policy-map parent
class class-default
shape average 2048000
service-policy child
policy-map set_precedence
class interactive_av
set ip precedence 5
interface FastEthernet0/0
ip address 172.21.0.254 255.255.0.0
duplex auto
speed auto
no keepalive
service-policy input set_precedence
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
interface Serial0/0/0
ip address 192.168.1xx.3x 255.255.255.252
max-reserved-bandwidth 100
service-policy output parent
interface BRI0/1/0
description ###BACKUP LINK##
ip address 192.168.x0.2 255.255.255.xx2
encapsulation ppp
dialer idle-timeout 1000
dialer string 95114xxx17xx
dialer load-threshold 32 either
isdn switch-type basic-net3
isdn point-to-point-setup
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.xx6.xx
ip route 0.0.0.0 0.0.0.0 BRI0/1/0 254
ip http server
no ip http secure-server
ip access-list extended interactive_av
permit ip host 172.21.0.10 any
ip sla 1
icmp-echo 172.16.0.254 source-interface Serial0/0/0
threshold 5
frequency 100
ip sla schedule 1 life forever start-time now
access-list 111 permit ip any any
dialer-list 1 protocol ip permit
control-plane
line con 0
line aux 0
line vty 0 4
password cisco
login
scheduler allocate 20000 1000
end
pls let me know if this solution can work or not.
Thanks in advance
Puneet Kandwal
02-19-2008 12:22 AM
hi puneet
So now you can create a dialer group for your clinet on your ras. When the primary link fails the isdn will be intiated and the call comes to the ras after that it will be autheticated and foradd to the LNS and a L2 session will be intiatd for the same. Now you ca create a pool for the clinet on the ras when it gets authenticated it will get the ip from the pool and there shold be a loopback which is part of the vrf. In this way the communication will be possible. If you need configs please let me know i can forward the configs too Or you want to try at your end first.
regards
shivlu
02-26-2008 01:13 AM
thanks for rating dear
regards
shivlu
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