04-12-2013 01:34 PM - edited 03-04-2019 07:35 PM
Hi all..
I'm having some trouble configuring porting between interfaces.
Here is my situation.
I have a Cisco 891 router. What I need is to create 3 interfaces with the next IPs:
1. Port FastEthernet 8 - 20.40.1.1 - with a modem connected directly to it - 20.40.1.2
2. Port GigabitEthernet 0 - 193.2.5.100 - connected to a switch - LAN
3. Ports FastEthernet 0 and 1 for two VOIP phones - 190.168.5.2 and 190.168.5.3 - will be switchported to VLAN 10 - 190.168.5.1
I can send ping from a PC (193.2.5.1) to the modem interface (20.40.1.1) but not to the modem itself (20.40.1.2).
I played days with configurations and tried a lot of variation of ip routing and access-lists with no success.
Basically I need to comunicate freely betwin all the devices.
There are a lot of forums providing solutions to a same problems but they seems not working with the 891 router.
Can anyone show me the way, assuming I have a factory resetted router?
Edit:
Here my configurations:
interface FastEthernet0
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface FastEthernet4
no ip address
!
interface FastEthernet5
no ip address
!
interface FastEthernet6
no ip address
!
interface FastEthernet7
no ip address
!
interface FastEthernet8
ip address 20.40.1.1 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0
ip address 193.2.5.100 255.255.255.0
duplex auto
speed auto
!
interface Vlan1
no ip address
!
interface Async1
no ip address
encapsulation slip
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
control-plane
!
mgcp profile default
!
line con 0
line 1
modem InOut
stopbits 1
speed 115200
flowcontrol hardware
line aux 0
line vty 0 4
login
transport input all
!
end
Message was edited by: galaxy1983
04-13-2013 07:04 AM
You need to set an address to VLAN 1.
04-13-2013 11:56 PM
Why would I need to do that?
04-14-2013 04:15 AM
galaxy1983 wrote:
Why would I need to do that?
Because it's needed.
10-10-2018 02:02 PM
What's needed is an explanation.
04-13-2013 06:03 PM
Does the modem have a route back to your network?
Sent from Cisco Technical Support Android App
04-13-2013 11:57 PM
Yes
04-14-2013 07:14 AM
I am not familiar with the 891 that you show here; however it is common practice on the lower end routers that all of the faX ports are switchports, not L3 ports. As mentioned before you will need to add a VLAN1 address; this will assign a network to FastErthernet0 - 8. If by some chance this router does support L3 ports you will be able to issue a "no switchport" command on the interface to turn it into a L3 port prior to assigning the IP address.
These routers are designed for two destinct networks, gi0 (WAN) and VLAN1 (LAN). You can not add a 3rd routed interface to them. In order for the is work you would need to move to a modular router.
Cheers,
Sam
10-10-2018 02:05 PM
Port GigabitEthernet 0 - 193.2.5.100 - connected to a switch - LAN
Did you account for 193.2.5.100 being a public IP address? You should use private IP addresses for local LAN.
Please mark helpful posts.
10-10-2018 02:10 PM
You need to configure NAT on the outside and inside interfaces. You can then use your public IP address and port-address translation out to the internet.
outside interface command
ip nat outside
inside interface command
ip nat inside
Create an ACL to match traffic.
access-list 1 permit any
Associate the ACL to the NAT
ip nat inside source list 1 interface "interface" overload
In you configuration above, fastethernet 8 is the port.
You would then need to have a default static route out to the internet.
ip route 0.0.0.0 0.0.0.0 20.40.1.2
Please mark helpful posts.
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