Configure GLBP between 2 Routers

[godwin osas]

I want to setup a gateway load balancing protocol, I have a question about the physical connection.  My lab is setup as follows. 1 TWC cable modem, 1 Cisco 1841 router and 1 Cisco 2950 switch.

The FastEthernet 0/0 is connected to the cable modem, and the FastEthernet 0/1 is connected to the switch and this the gateway port for the LAN. Everything is working as intended.

My question is how do I connect the 2 routers together to configure GLBP, I know I have to use cross over cable, please note that I am not using the serial interface as I have no need to use it. The cable modem is connected to the router fa0/0 and it acquires IP address dynamically from my ISP.

Thank you in advance.

Mike

[Mark Malone]

Hi The switch where the 2 pcs are needs to have a connection to each 1800 router and then connect the 1800s together as well with a cross link , then run GLBP on the SVI interface on each router

You shouldn't need a crossover most newer kit supports mdix automatically for straight through cables

each 1800 would have a link to the modem as well with same default route for load balancing

[godwin osas]

Thank you for your response, I understand your explanation. I am ordering a 5 port switch to serve as a hub for the cable modem because it only have one Ethernet port that is connected to fa0/0 of the router.

I am still not clear about the physical connections between the 2 1841 routers considering that the fa0/0 and fa0/01 have been utilized. Please see attached file for the router physical ports and let me know which port to use for the interconnection between the 2 routers.

Thank you.

[Jon Marshall]

You don't need a physical connection between the routers.

You just connect the other router to the switch using it's fa0/1 interface and make sure everything ie. the router interfaces connecting to the switch and the clients are in the same vlan.

Jon

[godwin osas]

Thank you all for the help, I understand the logic now. Yes they are on the same VLAN. Once I have the 5 port switch delivered I will configure the glbp. I am currently studying for my ICND2 and I found this lab to be interesting and decided to try it out using my equipment instead of package tracer and I also want to have a redundancy in my home network.

I have 2 (2950's) switches, just need to configure STP, for now the glbp have the highest priority.

[Mark Malone]

You don't have to have the two routers connected like that it will work without it but in my opinion it would be better to have link between them  , but if your out of ports not much you can do other than use without cross connect or add a switch if you really want to but it should not effect the glbp it will operate over the current switch to each other router , you will still have a single point of failure though in your switch and the new hub but you will have redundant gateways in the 18s