05-14-2013 11:40 PM - edited 03-07-2019 01:21 PM
Hi Guys
Please find the attached topology
I have two router names R1 and R2
I am running OSPF b/w SW1 and R1
OSPF b/w SW2 and R2
iBGP b/w R1 and R2
HSRP b/w R1 and R2 ---- Firewall points to HSRP VIP and redundancy is achieved
In case Router R1 fails , SW1 losses OSPF relationship with R1 and It wont be able to reach firewall
In case Router R2 fails , SW2 losses OSPF relationship with R2 and it wont be able to reach firewall
Can you please provide me with a solution so that if R1 fails SW1 will still be able to reach firewall via R2
Thanks
Solved! Go to Solution.
05-15-2013 01:29 AM
Hello
Create an additional ospf adjacency between SW1& SW2.
res
Paul
Please don't forget to rate any posts that have been helpful.
Thanks.
05-15-2013 02:26 AM
Hello,
use "ip ospf cost 100" command in fe0/2 of switch 2. So the prefered path in switch 2 will be switch1.
Regards
05-14-2013 11:41 PM
05-15-2013 01:29 AM
Hello
Create an additional ospf adjacency between SW1& SW2.
res
Paul
Please don't forget to rate any posts that have been helpful.
Thanks.
05-15-2013 01:50 AM
Hello,
I agree pdriver. You need a alternative path. My recommendation is create a VLAN that connect R1 (f0/0), R2 (f1/0), sw1 (fe0/3 and f0/0), sw (fa0/0 and f0/2). If you want you can propage it to intermediate switch if you have STP enable. Why this topology?. Beacause OSPF is specially designed to work in a LAN topology electing a Designated router (DR) and a Back DR( BDR). Relationships are established bettween DR router and the others (also BDR and the others) and multicast protocol is used. It consumes less BW and CPU process in routers. You can use (opsf priority command) R1 and R2 as
DR and BDR. All devices must be in area 0.
Be careful with iBGP (administrative distance 200) and OSPF (administrative distance 110).
Think if you want to also enable OSPF between R1 and R2.
Regards.
05-15-2013 02:11 AM
Hi there Thanks for your reply
aim is to run ospf b/w router and switches then redistribute in bgp and then send the bgp routes to remote site via mpls
05-15-2013 02:17 AM
Another Quick one How can I assure that all traffic utilizes R1 only from both the switches. R2 just sits there as standby
Thanks
05-15-2013 02:26 AM
Hello,
use "ip ospf cost 100" command in fe0/2 of switch 2. So the prefered path in switch 2 will be switch1.
Regards
05-15-2013 03:41 AM
Hi Antonio,
Sub interface fa0/2 is not accepting ip ospf command
05-15-2013 03:48 AM
All done thanks Put it under vlan interface
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