877 nat issue

Unanswered Question
Jul 19th, 2010
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have 877 series router with adsl modem interface build in.

dialergroup assigned to atm interface

using unnumber ip , memebr of vlan1

int vlan assigend with public ip address.

2 other devices with public ip address connected to router

need to connect 3rd device on private ip address and nat traffic from it address as inside to a public ip in overload  configuration.

having trouble getting it to work.

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Giuseppe Larosa Mon, 07/19/2010 - 13:40
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Hello Keith,

to put a physical FE port in Vlan2 you need additional commands

interface FastEthernet3


!interface conntected to devices on vlan2


You should have:

int fas3


switchport mode access

switchport access vlan 2


the Fas ports are like switch ports in a Cisco IOS LAN switch

Hope to help


Keith Craycraft Tue, 07/20/2010 - 05:00
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The following commands are in the config:

int fas3


switchport mode access

switchport access vlan 2

However when I try to access web site or ping from vlan 2 host  it times out.

I can ping vlan 2 ip address.  and the outside interface of the router from vlan 2.

if i do a Show IP NAT STATS  it shows me what is inside and outside interfaces information but  thats it.

the sh ip nat translations shows nothing.

for some reason its just not doing the translations.


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