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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?

--
PL/I for OpenVMS
www.kednos.com

On May 29, 2:41 pm, "Tom Linden" <t...@kednos.company> wrote:
> 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?
>
> --
> PL/I for OpenVMSwww.kednos.com

Customer side is you, your gateway (their side) is 121. That is my
interpretation.

Tom Linden wrote:
> 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

should clarify it. AT&T router means router under AT&T authority. So .122 is your
side. You're AT&T's customer.


> 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?
>