I am in the middle of migrating to a new IP scheme. From 192.168.10.x/23 to 10.6.x.x/19. Our ISP handles layer 3 and we statically route from our L2/L3 Cisco 3750G switch stack to their L3 device.
Currently the static route is setup on our L2/L3 switch as such. This points to the ISP's handoff interface:
Cisco3750Stack#show run | begin ip route 0. ip route 0.0.0.0 0.0.0.0 192.168.10.1
We have injected 10.6.x.x DHCP pools into the switch configuration and I have set the configuration on one test interface (gi2/0/43) to pull the new DHCP configuration along with new VLAN configuration. It was successful in pulling the new scheme to that particular interface.
My Question: Can I add a static route
Cisco3750Stack#ip route 0.0.0.0 0.0.0.0 10.6.0.1 10
to the existing static route and be able to test connectivity with the new IP scheme assuming that the ISP has configured their side properly to receive the new 10.6.x.x/19 block?
IMPORTANT: I added an administrative distance of 10 to the end of this particular static route (shown above) so to not affect the current production route.