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Simple Infrastructure Question

scott.cummins
Level 1
Level 1

I have a new Point to Point Cleas DS3 circuit which will terminate at both ends in a 3845, what would be the appropriate modules for such a circuit in a 3845

31 Replies 31

Collin

I agree, I have a straight through RJ-45 and have tested it, I have two PA-MC-2T1 Cards and I am using port 0 on both directly connectced, All I have is an enable light. I am mystified

Do you have access to the smartjack? Can you loop one side and see if the other comes up?

If I put my loopback plug in, the link light comes up on both routers, If I put it in a local line loopback I get an amber link light, On Both routers. I do not know where the "smartjack" is, Most confounding thing, I have to be doing something wrong.

You have both routers local to you (not in production)? I thought they were connected to your carrier. If they are "back-to-back", you need to make a special cable. Here's a link on how to make it. Please let me know if I'm wrong in my new assumptions.

http://www.cisco.com/en/US/products/hw/routers/ps233/products_tech_note09186a00800a3f09.shtml

No, You are correct, I may not have mentioned that they were back to back and I was just testing them on the bench. I had no Idea I needed a special cable. I apologize for giving you foggy info. I will check the link and follow the directions. Man, I am glad I was so confused..Thanks

Well it is amazing how things will work with the right cable.It is linked up Should my "Line protocol" be up. But I am most appreciate of all your help

If it's configured right it should be up. Make sure one side is providing clocking.

http://www.cisco.com/en/US/tech/tk713/tk628/technologies_configuration_example09186a00800a6b82.shtml

Collin

Yes, I was able to rectify that right before I went home, the Cisco Links you posted are quite helpful, thanks so much. I am able to ping through my router to the next router and its ethernet port (10.20.40.1). However, I cannot ping the ethernet port on the other end attached at the other firewall

(10.20.40.3) I have the port up, However at this time it is not connected to anything.

Do you notice anything about my config that stirkes you as incorrect Or do I actually need a connection to bounce back from 10.20.40.3?

Router 1

controller T1 2/0

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24

!

controller T1 2/1

framing esf

linecode b8zs

!

!

!interface GigabitEthernet0/1

description **Scottsdale_Orlando Gateway**

ip address 10.20.40.1 255.255.255.0

duplex auto

speed auto

media-type rj45

no negotiation auto

!

interface GigabitEthernet0/2

no ip address

shutdown

duplex auto

speed auto

media-type rj45

no negotiation auto

!

interface GigabitEthernet0/3

no ip address

shutdown

duplex auto

speed auto

media-type rj45

no negotiation auto

interface Serial1/0

no ip address

shutdown

serial restart-delay 0

!

interface Serial1/1

no ip address

shutdown

serial restart-delay 0

!

interface Serial1/2

no ip address

shutdown

serial restart-delay 0

!

interface Serial1/3

no ip address

shutdown

serial restart-delay 0

!

interface Serial2/0:0

ip address 10.10.20.1 255.255.255.254

encapsulation ppp

!

ip classless

ip route 0.0.0.0 0.0.0.0 10.10.20.2

no ip http server

!

!

!

!

!

!

!

!

!

gatekeeper

shutdown

!

!

line con 0

stopbits 1

line aux 0

line vty 0 4

!

!

end

Router 2

controller T1 2/0

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24

!

controller T1 2/1

framing esf

linecode b8zs

!

!

!interface GigabitEthernet0/1

description **Scottsdale_Orlando Gateway**

ip address 10.20.40.3 255.255.255.0

duplex auto

speed auto

media-type rj45

no negotiation auto

!

interface GigabitEthernet0/2

no ip address

shutdown

duplex auto

speed auto

media-type rj45

no negotiation auto

!

interface GigabitEthernet0/3

no ip address

shutdown

duplex auto

speed auto

media-type rj45

no negotiation auto

!

interface Serial1/0

no ip address

shutdown

serial restart-delay 0

!

interface Serial1/1

no ip address

shutdown

serial restart-delay 0

!

interface Serial1/2

no ip address

shutdown

serial restart-delay 0

!

interface Serial1/3

no ip address

shutdown

serial restart-delay 0

!

interface Serial2/0:0

ip address 10.10.20.2 255.255.255.254

encapsulation ppp

!

ip classless

ip route 0.0.0.0 0.0.0.0 10.10.20.1

no ip http server

!

There are a couple of things to change. The subnet mask on the serial interfaces should be 255.255.255.252, not .254. Your routes look good. The ethernet interfaces on each router are the same subnet. When a packet from R1 hits R2, R2 thinks that subnet is locally connected (because it is!) so it will never router back over the serial connection. On R2 change 10.20.40.3 255.255.255.0 to 10.20.30.3 255.255.255.0, then try and ping.

Collin

Once again, That seemed to do the trick, I am almost there. I do vaguely remember some of this stuff after you mention it, But it has been so long since I have done even the simpliest WAN routing. I really appreciate your help. I have what I believe is one last small hiccup. On the first router plugged into my gi0/1 (10.20.40.1) is my firewall DMZ port (10.20.40.2). Now from my first router I can ping that ip (10.20.40.2) from my remote router I cannot. However I can Ping gi 0/1 (10.20.40.1)from my remote router. That seems odd but As I said, I am relearning all this from the bottom up.

Your firewall needs a route to the remote network. Assuming you went with 10.20.30.0/24, the route in your firewall would be something like 10.20.30.0 255.255.255.0 gateway 10.20.40.1.

You are correct, I have that already, It just seems odd, That I can ping it from the first router and not the second. Even when My Firewall routing seems correct. I am going to make sure all ports are connected and examine my firewall again. If think of anything, I am always happy to have your help

Do your FW rules allow ICMP from that subnet?

I do have those rules. What I did was I put a route in my firewall for he 10.10.20.0/24 with a gateway of my DMZ interface and VIOLA, I can ping everything. Now I am going to connect the remote end and try the entire shot...

Sweet, let us know how it works out.

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