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840
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10
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Replies

"Simple" Config Issue - 1941 Router

pd4294
Level 1
Level 1

Good Day!

I am trying to get my 1941 to be about to allow reaching out.

Lab Setup:


[192.168.1.254 - PacBell Router - Goes to Outside]
|
[176.16.1.1 - Linksys Router - Emulates WAN Providing]
|
[176.16.1.2 - 1941 WAN Port, G0/0]
{Internal to the 1941}
[192.168.1.254 - 1941 LAN Port G0/1]
|
[192.168.1.253 - LAN Port on G350 Switch]
|
various devices

I am in the process of getting things set up so I can just transfer everything to the customer and "Plug and Play" the upgraded network. The ISP router there will be providing 176.16.1.1/24 and so the WAN side on the 1941 is 176.16.1.2/24

 

From the router, I get a response when I ping to Google @ 8.8.8.8 (going out the default WAN)

I get a failure when I ping 8.8.8.8 source 192.168.1.254 (LAN Side of 1941).

 

I get a response when I ping from those devices on the switch to 192.168.1.254 (LAN Port on Router)

I get a response when I ping from those devices on the switch to 176.16.1.2 (WAN Port on Router)

I get a failure when I ping to 176.16.1.1 (WAN Side of Linksys)

From either the G350 Switch or any device attached to the G350, Pinging Google generates a failure.

 

From the Router, I can telnet into the various devices connected and ping back to the router.

---

Running-Config

! Last configuration change at 14:49:11 pst Fri Oct 9 2020
!
version 15.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname BethanyRT
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
memory-size iomem 25
clock timezone pst -7 0
!
ip dhcp excluded-address 192.168.10.245 192.168.10.254
ip dhcp excluded-address 192.168.1.245 192.168.1.254
!
ip dhcp pool Public
network 192.168.1.0 255.255.255.0
default-router 192.168.1.254
dns-server 8.8.8.8
domain-name Bethany.Com
!
ip dhcp pool Bethany
network 192.168.10.0 255.255.255.0
default-router 192.168.10.254
dns-server 8.8.8.8
domain-name Bethany.com
!
no ip domain lookup
ip domain name Bethany.com
ip name-server 176.16.1.1
ip name-server 8.8.8.8
ip cef
no ipv6 cef
multilink bundle-name authenticated
!
cts logging verbose
!
license udi pid CISCO1941/K9 sn FGL221680AV
!
username [Deleted] privilege 15 secret 5 $1$NKb1$TELdYMIDaR2hD3Pzc9l1y/
username [Deleted] privilege 15 secret 5 $1$UHuQ$CSX.3rfk5g.DFShWtLcr9/
!
redundancy
!
interface Loopback0
description Loopback Port
ip address 10.10.10.1 255.255.255.0
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
description WAN Connection
ip address 176.16.1.2 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/1
description LAN Port
ip address 192.168.1.254 255.255.255.0
duplex auto
speed auto
!
ip default-gateway 176.16.1.1
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip default-network 176.16.1.1
ip route 0.0.0.0 0.0.0.0 176.16.1.1
!
control-plane
!
line con 0
exec-timeout 30 0
password 7 096E4B1D115041405E
login local
line aux 0
exec-timeout 30 0
password 7 096E4B1D115041405E
login local
line 2
exec-timeout 30 0
password 7 096E4B1D115041405E
login local
no activation-character
no exec
transport preferred none
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 1
exec-timeout 30 0
password 7 106C0C0D0D42445959
login local
transport input telnet ssh
line vty 2
login
transport input telnet ssh
line vty 3 4
exec-timeout 30 0
password 7 06240A35441B5F4B50
login local
transport input telnet ssh
line vty 5 1370
exec-timeout 30 0
password 7 06240A35441B5F4B50
login local
transport input telnet ssh
!
scheduler allocate 20000 1000
!
end

------------

Any thoughts or suggestions would be greatly appreciated.

 

1 Accepted Solution

Accepted Solutions

Hello
You will require NAT to accomplish the internet connection for your internal hosts.

Try:
conf t
no ip default-network 176.16.1.1
no ip route 0.0.0.0 0.0.0.0 176.16.1.1
ip route 0.0.0.0 0.0.0.0 gig0/0 172.16.1.1
access-list 15 permit 192.168.1.0 0.0.0.255
ip nat inside source-list 15 interface gig0/0
int gig0/0
ip nat outside
int gig0/1
ip nat inside


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

View solution in original post

5 Replies 5

Hello
You will require NAT to accomplish the internet connection for your internal hosts.

Try:
conf t
no ip default-network 176.16.1.1
no ip route 0.0.0.0 0.0.0.0 176.16.1.1
ip route 0.0.0.0 0.0.0.0 gig0/0 172.16.1.1
access-list 15 permit 192.168.1.0 0.0.0.255
ip nat inside source-list 15 interface gig0/0
int gig0/0
ip nat outside
int gig0/1
ip nat inside


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

Thank you!

This worked!

Hello,

 

in addition to Paul's post, also make sure that the Linksys router has a route back to the 192.168.1.0/24 network.

Hello @Georg Pauwen 
that wont be required has the internal subnet on the 1941 is being "hidden" by nat on the 1941 rtr also the same subnet resides on the Pacbell rtr and if you append a static route on the linksys the OP will drop connection to the internet as a whole


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

thank you!

I will let you know. the pillow is fast approaching my head and I will contend with things tomorrow.

 

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