I've done this before when connecting an HA pair of firewalls to a WAN link. The VLAN you use is not important. All you need to do is ensure that you tag the 2960X ports going to the ISP and the 4431 with the same VLAN ID and the traffic will pass ri...
description GE interface to LAN
ip address 192.168.1.1 255.255.255.252You said this network was a /24, why have you configured the interface as a /30? Have you mixed up the masks for the WAN and LAN interfaces?
This diagram doesn't make sense. You cannot give the switch the IP of 102.132.113.2/30 and a default gateway of 102.132.113.5 - that's a different subnet. Did you mean to make this a /29?
The 'Boot Variable does not exist' line is normal. Sounds like he's told the switch to bypass the startup config when booting. Try: switch# no system ignore startupconfig switch all
