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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 Clark
VIP Alumni
VIP Alumni

NM-1T3/E3

Hope that helps.

Yes Sir

That is a big help That was my choice, But I am not a Cisco Guy, However I have been asked to wear several hats now. I have some Cisco Experience nad recieved a CCNA in 2000 (But I moved over to become a SAN guy). I would like to ask one other question. If I have a point to point DS3 which is mine alone and I terminate each end with a 3845, Plus the ohter end is only one VLAN worth of traffic and One end is a port on a firewall. Could I configure the 3845 minimally to route with the default route and at my firewall, route that traffic to where it needs to go (internal LAN) and what would that config look like

Sure you can do that. On the remote end router you would have a route that would point to either the head end routers IP on the DS3 interface

ip route 0.0.0.0 0.0.0.0 [head end router IP on the ds3]

or since it's a point-to-point connection, you could use the interface to route

ip route 0.0.0.0 0.0.0.0 serial0

In your internal network, you'll need a static route for the remote network pointing to the firewall and in the firewall you'll need a route pointing to the DS3 router. Depending on the config of the DS3 router, you may need a route for the remote network and the corporate (or default) network.

Hi Collin

Thanks again, I thought that was what I wnted, But I always like to ask someone else, Also I went down to my remote site where one of the new CKT's is and I was shocked to discover my cable has two BNC connectors, So I will have to make sure I order the right Module

Scott,

The NM-1T3/E3 uses coaxial BNC connectors. You won't have a problem with ordering the wrong card that has different connectors. See the data sheet for more details

http://www.cisco.com/en/US/prod/collateral/modules/ps2797/ps4909/product_data_sheet09186a008010fba2.html

Mark

Yes Sir

I see that, Well that is a relief. I think I originally looked at the wrong card...Thanks again

Good day Gemtlemen and Cisco Guru's

I have two 7206's that I am trying to just get to route traffic on a T1 connection between the two. It is a point-to-point and I have one ethernet connection on each end, with an IP address asigned on the LAN facing side and T1 Controllers cards on the WAN facing side. Do I need to configure the Controller T1 ports in anyway except assigning an IP and assigning default routes on the 7206's

Maybe! Typically the default linecode and framing are OK in the US, but for reference, here they are-

framing esf

linecode b8zs

You may also have to set the clock source-

clock source internal

You should also set the timeslots-

channel-group 0 timeslots 1-24

All of the above are set under the controller interface.

If you want to use PPP instead of the default HDLC, you'll need to set that too (under the serial interface)

encapsulation ppp

Hope that helps.

What is the difference or perhaps the pros and cons to useing either HDLC or PPP? and yes, Your input is extremely helpful

PPP give you things like authentication & bundling. I suggest you use PPP, but it will work just fine with HDLC too.

I will definetly take your advice and USE PPP, And one last Question( if I direct connect the T1 ports on my routers ( I have them on my bench just rtying to get link) Should I see a link light and will they pass traffic that way just for testing?

You should get a green CD light at a minimum. To pass traffic you will need to configure the controllers. Once they are configured correctly, layer 2 traffic (ie CDP) traffic should pass.

Hey Collin (and whoever else wants to spoon feed me..)

I am just going to post these two config files and let you tell me where I am wrong, I am NOT getting a link light for some reason

ROUTER 1

Building configuration...

Current configuration : 1406 bytes

!

version 12.3

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname ORLND7206001

!

boot-start-marker

boot-end-marker

!

enable secret 5 $1$K6fv$0V2u3dLrVF1aS1rhq2RFM1

!

no aaa new-model

ip subnet-zero

!

!

!

ip cef

!

!

!

!

!

!

!

!

!

!

!

!

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

ORLND7206001#

Router 2

Building configuration...

Current configuration : 1396 bytes

!

version 12.3

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname ORLND7206002

!

boot-start-marker

boot-end-marker

!

enable password Supp0rt@EM

!

no aaa new-model

ip subnet-zero

!

!

!

ip cef

!

!

!

!

!

!

!

!

!

!

!

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

shutdown

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

!

!

!

!

!

!

!

!

!

gatekeeper

shutdown

!

!

line con 0

stopbits 1

line aux 0

line vty 0 4

end

ORLND7206002#

!

!

If you are not getting a green CD light on the card, you have a physical layer problem (ie cabling). You should have a regular RJ-45, straight-thru patch cord from the smartjack to the serial port on the router. Is that what you have? If so, do you have any green lights on the smartjack when the router is plugged in?

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