My 877W Router stops responding if not active in some period of time, please help

[zxspectrum128kb]

Hello everyone!

I ave this kind of problem on my 877W router:

The router is connected to ISP throuth its FE0 interface because I have a cable internet:

!

interface FastEthernet0

end

!

interface Vlan1

no ip address

no ip redirects

bridge-group 1

bridge-group 1 spanning-disabled

end

interface BVI1

mac-address ####.####.####

ip address dhcp

ip directed-broadcast

ip flow ingress

ip nat outside

ip virtual-reassembly

zone-member security OUTSIDE

end

I have done this way because router doesn't have a routable switchport and plus I have to use MAC address to get ISP's IP address.

ok, internal network is connected through its FE1 interface and IP addres is set on VLAN 2 interface.

interface Vlan2

ip address 192.168.2.1 255.255.255.0

no ip redirects

ip directed-broadcast

ip flow ingress

ip nat inside

ip virtual-reassembly

zone-member security INSIDE

end

There's nothing else connected to the router.

Now problem is that the router stops responding from outside world after some inactivity period. eg if I shutdown computers inside internal (VLAN 2) network, then in some period of time the router stops accepting anything on WAN interface.

As soon as I turn on something in VLAN 2 network, it goes back as normal. Do I need to play with keepalive command, and if yes, where?

I need your help!

thanks

[Vasilii Mikhailovskii]

Hello.

How do you check that router is not responding?

My guess:

You might be trying to connect to some IP-address that is NATed into VLAN2 address.

After VLAN2 goes down, you can't connect to inside interface.

[zxspectrum128kb]

Nope, I'm trying to connect to the router itself, of course I can't reach anything inside VLAN 2 interface when WAN is down.

[Vasilii Mikhailovskii]

Hello.

What IP-address are you using to connect to the router?

What is your address during the test?

Do you have any NAT translations configured for th IP-address?

What does show log say?

[zxspectrum128kb]

I'm trying to connect using WAN interface IP address, from outside, there's no ping. As soon as something is turned on inside network it pings again.

of course I have NAT configured. I think that the FE0 or BVI interface goes down after inactivity period and goes up if NAT activates from inside network.

I think I need to log in to the router by console and check exactly which interface going down.