Home lab scenario

mella060

Hi, just wondering how this would work.

I have a cisco 871 which ive been using for my home ADSL. I have a 3550 which id like to add to the network and have pcs connect to the switch instead. What i have done is create a routed port on the 3550 which then connects to the 871, which then connects to the modem/internet. On the 3550 ive created a SVI for vlan 11 and then connected a PC with an IP of say 192.168.11.10 to a port in vlan11.

Would it be ok then to run a default route on the 3550 pointing to the vlan 1 interface on the 871 ?

The thing is the 871 has one layer 3 port which connects off to the net and then 4 integrated switchports. How will it work with connecting one of these switchports to the routed port on the 3550 ?

I ran ospf on the 871 and 3550 and it seemed to pick up the neighbours fine.

So the 871 is being used for NAT and the 3550 for inter-vlan routing.

Any ideas ?

Thanks

mzinz

mella060 wrote: »

Hi, just wondering how this would work.

I have a cisco 871 which ive been using for my home ADSL. I have a 3550 which id like to add to the network and have pcs connect to the switch instead. What i have done is create a routed port on the 3550 which then connects to the 871, which then connects to the modem/internet. On the 3550 ive created a SVI for vlan 11 and then connected a PC with an IP of say 192.168.11.10 to a port in vlan11.

Would it be ok then to run a default route on the 3550 pointing to the vlan 1 interface on the 871 ?

The thing is the 871 has one layer 3 port which connects off to the net and then 4 integrated switchports. How will it work with connecting one of these switchports to the routed port on the 3550 ?

I ran ospf on the 871 and 3550 and it seemed to pick up the neighbours fine.

So the 871 is being used for NAT and the 3550 for inter-vlan routing.

Any ideas ?

Thanks

This will work fine, very common.

Can you put an IP on the 871 VLAN? Make sure its in the same subnet as the routed ported on the 3550.

jason_lunde

You could even create the SVI's on the 871, and have those 4 switchports trunking or etherchanneled to the 3550. Theres a few different ways you could do it, just depends on you, and whether or not you want that 3550 acting as a layer 3 device.