Cisco 2900 series - 2901 ISP

[edmundo23]

Hello,
I need help, I have a cisco router 2901, without license plates, I wonder if it's possible to make routing provider (ISP) to my network only with the ports G0 / 0 as external and G0 / 1 Internal.

thanks

[johnlloyd_13]

hi,

yes, it's absolutely possible with just a base license on your 2901.

btw, there's no 'license plates' on ISR G2 routers :)

it's just plain 'license' and could be verified via show license command.

#sh license
Index 1 Feature: ipbasek9                       
        Period left: Life time
        License Type: Permanent
        License State: Active, In Use
        License Count: Non-Counted
        License Priority: Medium
Index 2 Feature: securityk9                     
        Period left: Life time
        License Type: Permanent
        License State: Active, In Use
        License Count: Non-Counted
        License Priority: Medium
Index 3 Feature: uck9                           
        Period left: Life time
        License Type: Permanent
        License State: Active, In Use
        License Count: Non-Counted
        License Priority: Medium

[edmundo23]

Hi,
in my router i have a license like that:

Index 1 Feature: ipbasek9
        Period left: Life time
        License Type: Permanent
        License State: Active, In Use
        License Count: Non-Counted
        License Priority: Medium
Index 2 Feature: securityk9
        Period left: Life time
        License Type: Permanent
        License State: Active, In Use
        License Count: Non-Counted
        License Priority: Medium
Index 3 Feature: uck9
        Period left: Life time
        License Type: Permanent
        License State: Active, In Use
        License Count: Non-Counted
       

How do I make it work?

[johnlloyd_13]

hi,

what info did your ISP give you? i.e. ISP hand off, public WAN/LAN IP subnet.

do you know at least how to configure IP addresses on interfaces, default route and NAT?

[edmundo23]

I think so .
See my code

!
interface GigabitEthernet0/0
 description PrimaryWANDes
 ip address ISP
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 description LAN
 ip address LAN
 ip nat inside
 ip virtual-reassembly in
 ip tcp adjust-mss 1412
 duplex auto
 speed auto
!

ip nat inside source list 1 interface GigabitEthernet0/0 overload

ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0

[johnlloyd_13]

hi,

can you ping 8.8.8.8 from your 2901?

you can tweak your config:

no ip route 0.0.0.0 0.0.0.0 gig0/0

ip route 0.0.0.0 0.0.0.0 <ISP IP/HOP>

access list 1 permit <LAN IP NETWORK> <SUBNET MASK>

[edmundo23]

the ISP has IP / mask / GW and primary and secondary DNS, do not know how to configure the G0 / 0 interface,
can not ping router 8.8.8.8 for 2901

[edmundo23]

the ISP has IP / mask / GW and primary and secondary DNS, do not know how to configure the G0 / 0 interface,
can not ping router 8.8.8.8 for 2901

[edmundo23]

hi

now i ping 8.8.8.8 from my 2901,

Bout i dont have internet on my computer.