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Cisco C1111-8P Double NAT with NETGEAR V7610

woohs1216
Level 1
Level 1

Hi all,

 

I am trying to configure Cisco C1111 router, getting the WAN connection from an existing NETGEAR V7610, which will work as a VDSL modem. 

WAN <-> NETGEAR (192.168.15.1) <-> (192.168.15.53) CISCO (192.168.1.1) <-> (192.168.1.x) PCs

 

I have configured NAT, from the Cisco end, but I am seeing very strange behaviour from the PCs connected to it.

 

1. The PCs say the internet is connected.

2. Web browsing works rarely. Sometimes it loads a page from the internet, but mostly (95%) it doesn't. I think it works well for a minute when I reboot the Cisco router.

3. Pinging is very stable. I do not think it's a DNS issue as it Pings to various internet address without any issues.

 

I am not understanding why the router is behaving like this. 

CONFIG
!
ip name-server 192.168.15.1 8.8.4.4 8.8.8.8
ip dhcp excluded-address 192.168.1.255 255.255.255.255
ip dhcp excluded-address 192.168.1.0 192.168.1.49
!
ip dhcp pool WEBUIpool
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.1.1 8.8.8.8 8.8.4.4
lease infinite
!
!
vlan internal allocation policy ascending
!
track 1 ip sla 1 reachability
!
!
!
!
!
!
interface GigabitEthernet0/0/0
description Telstra_Gateway
ip address dhcp
ip nat outside
ip ospf bfd
media-type rj45
negotiation auto
spanning-tree portfast disable
!
interface GigabitEthernet0/0/1
no ip address
ip nat outside
shutdown
media-type rj45
negotiation auto
spanning-tree portfast
!
interface GigabitEthernet0/1/0
switchport mode access
!
interface GigabitEthernet0/1/1
!
interface GigabitEthernet0/1/2
!
interface GigabitEthernet0/1/3
!
interface Vlan1
ip address 192.168.1.1 255.255.255.0
ip nat inside
no autostate
!
ip http server
ip http authentication local
ip http secure-server
ip forward-protocol nd
ip dns server
ip nat inside source list 11 interface GigabitEthernet0/0/0 overload
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 track 1
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 192.168.15.1
!
!
!
ip sla 1
icmp-echo 8.8.8.8 source-interface GigabitEthernet0/0/0
ip sla schedule 1 life forever start-time now
ip access-list standard 11
10 remark define internal networks
10 permit 192.168.1.0 0.0.0.255
dialer-list 1 protocol ip permit
!
route-map track-primary-if permit 1
match ip address 197
set interface GigabitEthernet0/0/0
!
route-map track-secondary-if permit 1
match ip address 197
set interface GigabitEthernet0/0/1
!

Can someone help me with the configuration?

1 Reply 1

balaji.bandi
Hall of Fame
Hall of Fame

i suggest below steps :

 

no ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 track 1
no ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 192.168.15.1

ip route 0.0.0.0 0.0.0.0 192.168.15.1

change the DNS order :

p dhcp pool WEBUIpool
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 8.8.8.8 8.8.4.4

when the PC slow internet from router are you able to ping google.com ?

post show interface gig 0/0/0 (see any Inerface errors)

when the you have issue, show nat tranlation. and any logs (show logging ?)

BB

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