I have a customer who is using their ISP to provide their on premise routers as part of their MPLS, which has a firewall service on their internet breakout. The routers onsite are in a HSRP configuration.
I want to add layer 3 switch functionality, so to do this we have a pair of HP Procurve (now Aruba) 2920 stacked switches.
So the layer 3 switches will become the default gateway, with the ISP's routers remaining. I have asked for the ISP routers to have their IP range changed as I want to retain the subnet for the customer and I don't want to change their servers IP addresses etc.
ISP router 1 - 172.16.10.13/28
ISP Router 2 - 172.16.10.14/28
HSRP address 22.214.171.124/28
The Core switch stack IP is 172.16.10.2/28
The core switch will carry on running the existing subnet 10.1.1.0/24, with the core switch stack now having the default gateway that used to belong to the ISP HSRP.
The default route 0.0.0.0 0.0.0.0 172.16.1.1 will be set on the core switch stack
I have requested that the ISP add the routes to forward all traffic to the 10.1.1.0 network to the core switch stack
The ISP router 1 will be in the top core switch and ISP router 2 will be in the second core switch
- Can I use the HSRP address as the default route in this instance?
- Any other foreseeable issues?