Hello Folks,
We have Cisco 1841 router which is used to connect our isolated LAN for internet access . We have configured the device without any issues and kept that in network .
Topology is | Private LAN <--> Router <-->ISP |
But after few minutes (12-13 mins max) we are observing below
1) Cannot ping the default gateway who is neighbor to our WAN interface.
2) That causes all the traffic to stop and we had to bounce the WAN interface to make it work . again it works for 13 mins max.
3) Did some debug , but no luck
4) No logs were recorded at the router during the issue.
5) Changed to another brand new router , but the issue remains same.
Any suggestions from your end ?
Configuration snap
---------Truncated--------------
interface FastEthernet0/0
description WAN-INF
no ip address
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet0/0.1234
description WAN
encapsulation dot1Q 1234
ip address 5.5.5.2 255.255.255.252
ip nat outside
ip virtual-reassembly
!
interface FastEthernet0/1
description **** Private LAN ****
ip address 192.168.0.254 255.255.255.0
ip access-group nat in
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
ip nat inside source list nat interface FastEthernet0/0.1234 overload
ip route 0.0.0.0 0.0.0.0 5.5.5.1
!
ip access-list extended nat
permit ip 192.168.0.0 0.0.0.255 any
-------------------End------------------------------------------------------------------
