back-to-back set up and up but no ping?

[andyinva]

I ma seting up a two router lab. I used a setup for back-to-back Frame Relay which I got off the Cisco website. Both interfaces are up and up yet I can not ping eather side. Any one got a clue? I am just starting out on my CCNA. Thanks Andy


DCE setup Router 1

interface serial0
no ip address
encapsulation frame-relay
no keepalive
clock rate 64000
interface serial0.1
point-to-point
ip address 172.16.120.105 255.255.255.0
frame-realy interface-dlci 101



DTE setup Router 2

interface Serial0
no ip address
encapsulation frame-relay
no keepalive
interface serial0.1
point-to-point
ip address 172.16.120.120 255.255.255.0
frame-relay
interface-dlci 101

 

[blutekhnd]

Try moving your dte to s1

 

[andyinva]

I tried interface serial1 both sides up and up but no luck. I guess I should be able to ping the ip on the serial interface as well as the ethernet. The routers look good. Two 2501's

 

[blutekhnd]

I just noticed you have a class B ip address and a class C subnet mask. I don't know if that would make a difference or not.

 

[geirendre]

Can you set up a back-to-back framerelay setup like that?
Don't you need some kind of FR-switch or simulator in between the to Routers?
(to simulate the FR cloud).

 

[cryptomap]

You would be better using encapsulation hdlc

 

[andyinva]

I was reading a little and noticed that for ping to work on a serial line. It has to bounce of the other end of the connection. I tryed trace and It comes up with 30 set of astics. I now have the serial interfaces at 192.168.100.1/24 and 192.168.100.2/24

Tracing the route to 192.168.100.1

1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
Router2#

I can't understand why I can't ping from router1 or router2 to its own serial interface I guess ping is completly diffrent on a serial line. From the trace above I would guess data is passing over the line.
The cisco doc I used is at this location.

http://www.cisco.com/warp/public/125/frbacktoback.html

I'l try HDLC & PPP.

 

[andyinva]

Got it working. I tried both HDLC & PPP could ping all interfaces. It maybe I don't understand the back-to-back fraem-relay doc from cisco in early posting or it gust does't work.

 

[andyinva]

Thanks to every one who responed. I can see in just a few days of working with the two 2501 routers that it is of great help for the CCNA test.