11-21-2011 02:19 AM - edited 03-04-2019 02:21 PM
Hello everyone
Could someone please help with the following query.
We are trying to implement a change on our network (please see the attached network diagram).
Please note that the links in red are new links that needs to be implemented. The 2 sites are part of the same logical network and we use different subnets on the 2 sites and all the vlan interfaces are defined on the layer 3 switch on site A and ALL traffic bound for the WAN goes via Firewall 1 and Router 1 using static routes.
We are in the process of adding another link the the WAN as seen on the diagram. The 2 new requirements are:
1. We want traffic from Vlan 30 and 40 bound for the private network to go via the new link (Firewall B and Router B)
2. In case of failure of Router A or Router B, we want all traffic bound for the private network to go via the Router that is up.
Any help implementing these requirements is greatly appreciated.
Raoul.
11-21-2011 02:47 AM
Hello,
You might consider to run a routing protocol between 2 sites(all devices) and then adjust path cost on 2 coreswitches to prefer WAN link. In case WAN link's down the coreswitch should use fiber(backdoor) instead.
HTH,
Toshi
11-21-2011 02:50 AM
Thanks Toshi for your reply. I knew that I needed to implement a routing protocol between 2 sites but I need help on where and how to implement.
Thanks
Raoul
11-21-2011 03:00 AM
Hi,
Okay you need to do as follows:
Lets say OSPF is what I want.
Both sites
1. L3 switch(including fiber(backdoor) , ASA , WAN Router running OSPF.
2. L3 switch will see network(vlan) of other sites via 2 possible paths. It should use fiber first.
3. You just modify cost on fiber link to be worst(65535) than a link(summary cost) connected to Firewall.
HTH,
Toshi
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