03-26-2012 10:29 PM - edited 03-04-2019 03:48 PM
Hi,
I have a cisco router 1841 in my client location.
we have connected with two ISP in one router.one is bsnl and other is TATA.
In the router we configured Eigrp protocol.
Config:
int fa0/0
ip address 10.10.20.100 255.255.254.0
Des ###LOCAL LAN####
duplex auto
speed auto
int fa0/1
Des ###TATA WAN###
ip address 10.70.128.63 255.255.255.252
encapuslation PPP
bandwidth 512
int se0/1/0
Des ###BSNL WAN###
ip address 192.168.63.25 255.255.255.252
encapuslation PPP
bandwidth 2048
router eigrp 20
no auto-summary
network 10.10.20.0
network 10.70.128.0
network 192.168.63.0
My question:
Our aim is BSNL should be work as primary link.If BSNL link fails means it should take TATA route.
And after BSNL link came means it should be working bsnl link.
How we give the BSNL as primary.
Any other configuration needed for the fall back.
Kindly tell me anyone.
03-26-2012 10:42 PM
hi
in eigrp you can use bandwidth and delay to change the path selection
you already increased the bandwidth on the BSNL
what you need to do is make the other link with a high delay value and the BSNL with low delay value
hope this help
03-26-2012 11:02 PM
What is delay value ??
how to calculate the delay value???
03-27-2012 02:59 AM
Delay value is applied to the interface of the router in order to affect the path selection.
Please, check the next link
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800c2d96.shtml
Hope that helps,
Vasilis
03-28-2012 02:54 AM
Hi Dinesh,
Was hoping to shed some light here. It seems that you are trying to use Eigrp to select best path towards your service provider. If that is not true, my apologies for the misunderstanding. If yes, then It cannot be done via EIGRP. you will require a First hop redundancy protocl such as HSRP. Please do provide details about other devices of your network for me to understand better. If both links are connected to the same router then you would need a static route that is tracked via IP SLA.
Cheers.
Rustom Billimoria
03-28-2012 02:16 PM
Hi,
I do not find any reason that you can not run EIGRP with the ISP router.
According to Dinesh config the WAN links are configured with EIGRP. If the ISP has not any problem (e.g. the ISP routers should be CISCO to run EIGRP) the primary-backup setup can be achieved with EIGRP too. The configuration to have primary/backup setup can be achieved as described to my previous post.
If the client router should receive the full internet routing table, then I agree the EIGRP could be a problem and BGP should be used. However, since the client router is a 1841 I do not think that this is our case (Dinesh can confirm that) and it will receive a summary (or default) route by the ISP.
Hope that helps
Vasilis
03-28-2012 09:14 PM
Hi,
Since Dinesh did not specify anything about the SP running EIGRP, I assumed they don't. Maybe after all these years of tshoot, I always tend to assume the worst. . Dinesh pleaes do confirm that the sp is running eigrp and what kind of routes you are receiving from both. As I did mention in my earlier, apologies for the misunderstanding.
Sent from my BlackBerry® smartphone from Tata Indicom
03-29-2012 05:35 AM
In the Service provider end they do only static routes.
03-29-2012 08:03 AM
Hi Dinesh,
So do you confirm that there is no eigrp running between you and the sp or
that there is eigrp but they only provide static routes via eigrp ?
Just trying to clear out what you said.
Regards
Rustom Billimoria
CCIE R&S# 24798
Sent from my BlackBerry® smartphone from Tata Indicom
03-28-2012 06:38 PM
Hello Dinesh,
This is the second time you have been asking the similar question. I believe, this was answered very clearly to you with a diagram. I am unable to find the thread, but yes this was answered in detail.
Just to help us all, Please DO NOT Mark a thread as "Correct Answer" if you still have confusion or have some clarifications, you should continue on the same thread.
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