NETWORK DESIGN HELP

Answered Question
Apr 1st, 2007
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I am in the process of preparing a network design. I can use only OSPF. I am wondering if Static Routes alone will meet my requirement. Please refer the attached diagram and kindly let me know experts opinions. I need good failover and load sharing at each location.

4 locations, location Z is connected to internet, so all the routers should point to Z as default gateway.

Thank You




Correct Answer by royalblues about 10 years 1 month ago

Friend,


You can always use static routes in the scenario but you need to have manula intervention everytime you want the link to fall back.


What you can do is to run OSPF on the LAN and redistribute your default route from the ASBR as a type1.

If an ISP link fails the ASBR would stop advertising the default to the campus.

This will ensure that from the LAN they take the best route to reach the ASBR and also ensure proper fallback to the other ASBR.


HTH, rate if it does

Narayan



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Correct Answer
royalblues Mon, 04/02/2007 - 01:19
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Friend,


You can always use static routes in the scenario but you need to have manula intervention everytime you want the link to fall back.


What you can do is to run OSPF on the LAN and redistribute your default route from the ASBR as a type1.

If an ISP link fails the ASBR would stop advertising the default to the campus.

This will ensure that from the LAN they take the best route to reach the ASBR and also ensure proper fallback to the other ASBR.


HTH, rate if it does

Narayan



avilt Mon, 04/02/2007 - 17:17
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How about the following config?

I will define 2 VRRP groups at Main office on the LAN segment of the routers and on the L3 switch I will define 2 default gateway pointing to VRRP IP's. I will have both fault tolerance and load sharing.

Then run OSPF on all the routers. Add default gateway on all the routers to point to Location Z.

devang_etcom Mon, 05/07/2007 - 20:13
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hi,


do you have all cisco devices then go for the HSRP... and yes if you are using the two different group of VRRP/HSRP then you will have two different Virtual IP address, which is configured as default gateway of host... then yes configure the two static route pointing toward the vrrp/hsrp...


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