I've got what may seem like an obvious problem, but I'm trying to create a test network separate from my production environment. I have a spare 1720 router with a WIC-1DSU-T1 card. I have configured the FE0 interface for the new test network, and the S0 interface for the production network. I'm having trouble getting the serial interface to work. It is in alarm state. Is that because I need "something" on the other end to attach S0 to? Currently, it's just attached to a switch in the production environment. Any help is appreciated.
You cannot attach a switch to the WIC-1SU-T1 interface. You would have to attach it to a serial interface on another router using a T1 crossover (cross 1,2 to 4,5)
Thank you all for your responses. The problem is that I have only one router, not two. Is there any configuration I could do with the existing router to separate the networks using only that one router? I do happen to have a WIC-1T if that helps.
My router config follows:
no parser cache
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
logging rate-limit console 10 except errors
enable secret xxx
memory-size iomem 20
ip name-server 192.168.20.44
no ip dhcp-client network-discovery
ip address 192.168.20.253 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.20.7
ip route 10.30.30.0 255.255.255.0 FastEthernet0
no ip http server
line con 0
line aux 0
line vty 0 4
no scheduler allocate
Tha router wn't help you without another ethernet interface, unles I am misunderstanding what you are trying to do.
What kind of switch(es) do you have? Are any layer 3? Alternately, you could create a seperate VLAN on your existing switch for your test network, trunk your uplink to the router and create subinterfaces on the FE port of the router that the switch is uplinked to, depending on your goal. Can you maybe post a diagram of what you are trying to accomplish?
I have attached a very simple diagram of what I'm trying to do.
Yes, we have some layer 3 switches and layer 2 switches. I'm basically just trying to figure out how I can use the router to separate out the test network. My PIX firewall doesn't have any extra ports, or else I'd just hang it off of that.
It might come down to me just having to purchase another router, which I'm okay with, I just thought I should be able to do this with just one router.
Though you don't have a second interface to physically separate the two networks you may be able to logically separate the networks using router-on-a-stick feature. Configure two VLANs on the switch, set the switchport connected to the router as a trunk and on the router configure dot1q/isl sub-interface(s) to route traffic for the two VLANs. On your switch assign the ports to which the production or test PCs connected to the appropriate VLANs.
Here's a couple of links that can help you with the configuration.
Use the Cisco Feature Navigator tool see if your router and the IOS support router-on-a-stick feature.