I currently have a Cisco 831 acting as my main router. An ethernet ADSL modem is attached to the 831's WAN interface, so the latter acquires a public IP address from my ISP. The ISP in queston is O2, who use RFC 1483 rather then PPP. So, the bones of the configuration on the 831 are as follows:
ip dhcp excluded-address 10.10.10.1 10.10.10.9
ip dhcp pool CLIENT
network 10.10.10.0 255.255.255.0
ip address 10.10.10.1 255.255.255.0
ip access-group 100 in
ip nat inside
ipv6 address 2001:470:1F09:1728::/64
ip address dhcp client-id Ethernet1
ip access-group 101 in
ip nat outside
ip inspect SDM_LOW out
The ethernet ADSL modem has a config / stats page at address 10.0.0.138, and I would like to be able to view this from clients on the LAN side. If I temporarily set the address of Ethernet1 to 10.0.0.1, I can see the modem's page but obviously I lose internet connectivity. A permanent solution would be to give Ethernet1 a secondary address of 10.0.0.1, but IOS will not allow this as it is acquiring its primary address via DHCP.
Any ideas if there is another way of achiving this ?