Could you post the configs for each. Try turning off proxy arp see if that fixes the issue.

SW

interface GigabitEthernet2/23

ip address 10.105.28.25 255.255.255.252

speed 100

duplex full

end

ip default-gateway 10.105.28.9

ip classless

ip route 0.0.0.0 0.0.0.0 10.105.28.9

ip route 10.105.28.2 255.255.255.255 10.105.28.26

ip route 10.105.28.12 255.255.255.252 10.105.28.26

!

RTR A

interface GigabitEthernet0/1

ip address 10.105.28.2 255.255.255.252

duplex auto

speed auto

media-type rj45

no negotiation auto

end

interface GigabitEthernet0/3

ip address 10.105.28.13 255.255.255.252

duplex auto

speed auto

media-type rj45

no negotiation auto

end

ip route 0.0.0.0 0.0.0.0 10.105.28.1

ip route 10.105.28.0 255.255.255.0 10.105.28.6

ip route 10.105.28.24 255.255.255.252 10.105.28.14

RTR B

interface GigabitEthernet0/1

ip address 10.105.28.26 255.255.255.252

duplex auto

speed auto

end

interface GigabitEthernet0/0

ip address 10.105.28.14 255.255.255.252

duplex auto

speed auto

end

ip route 10.105.28.0 255.255.255.0 10.105.28.25

OK - here is what I see:-

SW1

-You have a DG of .9 which is itself.

-A route to .12 via .26 - but .12 is not on your diagram.

-You have a default route and an IP default gateway - you only need one.

You are not routing thru the firewall - so why have it.

RTB - has no default route, so it will not route anything to the internet.

Your whole design makes no sense - as all the connections are on Gig interfaces, then this would appear to be a LAN network. You do not need to use /30 IP subnets for a LAN - ideally you would use them for WAN topology.

I suggest you redesign - you have multiple single points of failure and no redundancy.

HTH>

my apology, i configured the next hop as 10.105.28.26 and not .25. thanks