Changed to T1 from ATT, tired of local (lack of) service.
have 2621 router running 12.3 and the old config is as follows
interface FastEthernet0/0 description OUTSIDE INTERFACE TO THE INTERNET ip address 206.55.236.241 255.255.255.240 ip access-group 101 in no ip redirects no ip unreachables no ip proxy-arp ip nat outside speed auto full-duplex no cdp enable ! interface Serial0/0 ip address 206.55.246.110 255.255.255.252 ip access-group 101 in ip access-group 102 out ip nat outside no ip mroute-cache ! interface FastEthernet0/1 description INSIDE INTERFACE TO PRIVATE NETWORK ip address 10.0.0.1 255.255.255.0 ip nat inside duplex auto speed auto ! ip nat inside source list 1 interface FastEthernet0/0 overload no ip http server no ip http secure-server ip classless ip route 0.0.0.0 0.0.0.0 206.55.246.109 ! !
The info I got from ATT is Customer Serial IP Address: 12.89.208.122 AT&T Router IP Address: 12.89.208.121 Subnet Mask: 255.255.255.252
So my question is, which is which? is the 122 address the IP of my Serial line and 121 the other end at ATT?