Gre Implemetation over DSL

[cigalahgroup]

Hello All,

       I have GPON router which has a static IP Address, which is connected to CISCO 881 router to perform GRE Tunnel.

Is it possible ? If yes then how how ? 

[Georg Pauwen]

Hello,

which GPON router model/brand do you have ?

[cigalahgroup]

Huawei

HG8245Q

[Georg Pauwen]

Hello,

I don't know if your HG8245Q has a command line, but check if it does, and if it accepts the commands similar to the ones below. This would build a GRE tunnel on the Huawei side.

system-viewg>
[Huawei-Router1] interface Tunnel 1/1/1
[Huawei-Router1-Tunnel1/1/1] ip address 172.16.1.1 24
[Huawei-Router1-Tunnel1/1/1] tunnel-protocol gre
[Huawei-Router1-Tunnel1/1/1] source 100.100.100.1 24
[Huawei-Router1-Tunnel1/1/1] destination 200.200.200.1 24
[Huawei-Router1-Tunnel1/1/1] quit

[Joseph W. Doherty]

I would expect an 881 to support a GRE tunnel. Defining one, on the router, would include define a tunnel interface, and providing interface configuration commands.

Ideally you want to avoid fragmentation, so you'll want to use the commands to keep your MTU within the overhead used by GRE and DSL.

https://community.cisco.com/t5/networking-documents/how-to-configure-a-gre-tunnel/ta-p/3131970
https://networklessons.com/cisco/ccie-routing-switching/how-to-configure-gre-tunnel-on-cisco-ios-router
https://www.cisco.com/c/en/us/support/docs/ip/generic-routing-encapsulation-gre/25885-pmtud-ipfrag.html?dtid=osscdc000283

[cigalahgroup]

Actually  I am sharing internet from my neighbours using cable which is connected to internet DSL modem. At my house i have 1941 cisco router which I will connecT to G 0/0. The point is i am  getting DHCP assigned private address from the DSL router 192.168.1.10.

[Georg Pauwen]

Hello,

if sharing the Internet connection with your neighbor (and hopefully your neighbor knows you are doing it), you need to configure your router with something like the below. 

ip dhcp excluded-address 192.168.2.1
!
ip dhcp pool LAN
network 192.168.2.0 255.255.255.0
default-router 192.168.2.1
dns-server 8.8.8.8 8.8.4.4
!
interface FastEthernet0/0
description Uplink to DSL
ip address dhcp
ip nat outside
!
interface FastEthernet0/1
description LAN Interface
ip address 192.168.2.1 255.255.255.0
ip nat inside
!
ip nat inside source list 1 interface FastEthernet0/0 overload
!
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0 dhcp
!
access-list 1 permit 192.168.2.0 0.0.0.255

[cigalahgroup]

i did all this and its working fine.  Now the second phase is GRE tunnel to be implemented.

[Georg Pauwen]

Hello,

do you have full access to the other router ? Does the router take the commands mentioned above (earlier in this thread) ?

[cigalahgroup]

The Above mentioned solution is GRE Tunnel from Huawei to Cisco.

Since the GRE commands are running over Huawei. 

My situation is below mentioned

Actually  I am sharing internet from my neighbours using cable which is connected to internet DSL modem. At my house i have 1941 cisco router which I will connecT to G 0/0. The point is i am  getting DHCP assigned private address from the DSL router 192.168.1.10.

[Georg Pauwen]

Hello,

I am not following. What do you want to accomplish ? A GRE tunnel from where to where ?