06-12-2007 02:09 AM - edited 03-03-2019 05:23 PM
Hi ive got two sites with a cisco router at each, we primarly use our main lease line for normal operation which is connected via the fa0/1/3 port on each router. if the line goes down then we have another leased line we can manually switch to which is connected via S0/0/0 of each router. My question is what feature could i use to create an automatic failover to the line connected on the s0/0/0 ports?
many thanks
jonathan
06-12-2007 02:14 AM
Hi Jonathan, [pls rate if helps]
It depends on what Routing behaviour you need to acheive. You can use Some routing protocols.
Sample recomm....
For the first site you can Use Eigrp adv.. & for the second site you can use Static route with AD more than the normal.
You can also use OSPF & vary the Pri, Sec using Cost Factor.
Pls Rate if Helps
Best Regards,
Guru Prasad R
06-12-2007 02:27 AM
Hi,
As Guru said, if your are just using static routes, you can use a floating static route (a static route with a higher AD) for backup:
ip route 0.0.0.0 0.0.0.0 fa0/1/3
ip route 0.0.0.0 0.0.0.0 S0/0/0 254
HTH, please do rate all helpful replies,
Mohammed Mahmoud.
06-12-2007 02:45 AM
hi mohammedmahmoud thank you for your reply, so i just edit/create the static routes on each router using your commands displayed above (i guess i subistute the appropiate ip addresses in where youve put 0.0.0.0) and the 254 youve added on to the end of "ip route 0.0.0.0 0.0.0.0 S0/0/0 ", does that set the AD higher?
many thanks
jonathan
06-12-2007 02:56 AM
HI Jonathan,
AD means Administrative distance.
"254" - is an integer to increase the AD for the second static route (for failover). Whereas primary static route will not have any AD - it will be default.
PLs rate if Helps
Best Regards,
Guru Prasad R
06-12-2007 02:57 AM
Hi Jonathan,
You are correct, 254 is the AD (the highest available AD, to make sure that this route is always backup whatever the routing protocol of the main route).
I hope that i've been informative, and please never hesitate before asking any question.
HTH, please do rate all helpful replies,
Mohammed Mahmoud.
06-12-2007 02:32 AM
sounds promising i know what eigrp is but whats eigrp adv (im only ccna trained with some experience of CCNP). with the other site AD is that administritive distance?
kind regards
jonathan
06-12-2007 03:01 AM
HI Jonathan,
Site1 - via Primary - to Site2 = Eigrp
Site1 - via Backup - to Site2 = Static Route
Eigrp Adv means Eigrp advertisements. Link1 to use the Eigrp protocol between two sites.
LInk2 to use the Static route between two sites with AD as 254.
Note:Floating Static Routes will help you more to fix your requirement
Pls Rate if Helps
Best Regards,
Guru Prasad R
06-12-2007 03:05 AM
Jonathan
I believe that eigrp adv is eigrp advertisement. And AD is administrative distance.
I would suggest an approach slightly different from my colleagues. If you are going to run EIGRP as a dynamic routing protocol between the 2 sites then I would suggest running EIGRP on both links, and if necessary adjusting the metric to establish a primary path and a backup path. The advantage here is that you do not need any manually configured static routes and the failover will be more effective.
HTH
Rick
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