12-10-2009 01:36 PM - edited 03-04-2019 06:56 AM
OK so first off I have not been to any cisco type of training school. I'm sure the obvious answer is, "Well then go to one instead of asking all of us here then! =P
I have 2 cisco 2801's with CSU/DSU module in it.
I can interface the unit fine from the console port or by using the web based java enabled SDM 2.5 software.
I have setup the CSU/DSU using the console interface inputting:
ESF
B8ZS
NO (to fractional T-1)
no IP was configured into this serial device either.
I also have my FE 0/0 connection setup in Full duplex
Now, I have a homeade T1 crossover cable inputted into the CSU/DSU of each router. There are no alarm lights on either CSU and the CD light is green.
Thus telling me my connection between the two units via the "T1" link is good.
I can ping the router that is attached to either computer via ethernet just fine, but I cannot ping the other router attached via the "T1" link or the other computer attached to the other router.
Something like this:
Computer 1 <----> FE 0/0 (Router 1) <--??--> CSU/DSU (1) <---->HOMEADE Crossover cable (w/pins 1,2 & 4,5 reversed on one end) <----->CSU/DSU (2) <--??--> FE 0/0 (Router 2)<--->Computer 2
The question marks are there because I cannot ping computer 2 from computer 1 or vice versa. How can I tell if I have good connectivity from my routers FE 0/0 port to the CSU/DSU of the same router?
I mean it's not like I can ping it right?
Just throw out ideas on what you think I might be able to do to resolve this if you guys get a chance.
Thanks in advance for any help.
12-10-2009 01:51 PM
Hi,
Can you add a "show run", "show controller t1" / "show service-module", "show interface" from both the routers?
12-10-2009 02:53 PM
I will work on some of those but I've run into another problem now.
First, it seems my 2nd router isn't holding the setup information. Could this be due to a defective NVRAM chip? Or could it be that my IOS has become corrupted and needs to be reinstalled? I figured most of this stuff was kept on the Compact Flash Card but figuring doesn't give me the real answer. Currently I am running 12.4(3f) and it is no longer downloadable.
I've been to some page where I can download some MD IOS file also called Mainline? Is this the correct file I would want to download if I wanted to update/reinstall the IOS on my router? The latest 12.4 rev level for a 2801 looks to be 25b. Of course I do not have a current Agreement for this router so is there anyway I could pull the IOS off of the other router?
A couple of other things. Some of those commands post my passswords so I need to go through the logs and verify none of those show up.
Secondly when I did happen to run
"show controller t1"
NOTHING came up.
I'll get back to you with all the other stuff in a bit.
Thanks for the quick reply.
BTW I'm NOT looking for free IOS downloads. I just want to get this thing working in it's most basic function so I don't have to climb a 11,000ft mountain every time the stupid power goes out.
12-10-2009 03:56 PM
So here are the two boot sequences I pulled off hyperterm. The bottom one has no issues saving configurations the top one won't even save the configuration when it just got inputted 10 seconds ago.
I should probably move this portion of the thread elsewhere huh?
12-10-2009 03:58 PM
12-11-2009 01:22 AM
What do you mean by "router does not hold configuration"? Does it go back to default configuration on reload? If so, your config register
might be set incorrectly. it should be 0x2102 for the router to load the configuration on boot. You can see the config register value in "show ver"
the command would be "config-register 0x2102" in global config mode or something similar (use tab)
12-11-2009 07:27 AM
Yes. If I configure the machine then reboot it the configuration is now gone.
BUT the other thing is if I configure the machine and then use it I still cannot access it via the SDM program. Meaning that even after I JUST configured it, the darn thing is not retaining the config for some reason....
12-11-2009 07:30 AM
You have been told why the router does not keep configuration.
Do yourself a favor anf stop using SDM. It prevents you from learning and produces confusing an buggy configurations.
12-11-2009 07:46 AM
p.bevilacqua wrote:
You have been told why the router does not keep configuration.
Do yourself a favor anf stop using SDM. It prevents you from learning and produces confusing an buggy configurations.
Did I say something wrong in my previous post?
I'm not using SDM to try and configure the router I'm using SDM as a tool to verify that the router is maintaining its IP address info.
Which it is not.
12-11-2009 07:56 AM
I am not sure how SDM reads the configuration but did you try what I mentioned in my previous post? Also,
can you compare a "show start" and "show run" immediately after a "wr mem"?
12-11-2009 09:24 AM
Allright so the config-register was totally at some other point 0x804? iirc. Anyway got that changed and now it boots great.
So now that we are back on track I am still at the point where my CSU/DSU's are not allowing me to cross communicate between both routers.
I'll look back at yoru earlier posts and post some screens from Hyperterm (as I am unsure as to how to pull the data out of hyperterm that isn't all gibberish) on what you requested before the memory config problem.
Really apprieciate all the help you are giving me m8.
12-11-2009 09:37 AM
always use putty, never hypertem.
Then you take "show controllers t1", post together with config.
Note the crossed cabel must use T1 pinout, NOT ethernet.
12-11-2009 09:46 AM
p.bevilacqua wrote:
always use putty, never hypertem.
Then you take "show controllers t1", post together with config.
Note the crossed cabel must use T1 pinout, NOT ethernet.
T1/E1 wiring may use either a RJ45, DB15 or BNC connectors. The pinout shown uses RJ45 connectors - its formal name is USOC RJ-48C and is defined in ANSI T1-403-1989. T1 is a North America (primarily) digital service providing 1.544 Mbps. E1 is a European/Rest of World standard providing digital service at 2.048 Mbps. CATegory 5(e) cabling is used to provide balanced pairs. The color coding for Cat 5(e) cabling may be 568A or 568B.
RJ45 Pin | Signal | Notes |
1 | RX1 (Ring - negative) | |
2 | RX2 (TIP - positive) | |
3 | FGND (RX GND) | Ground/Shield |
4 | TX1 (Ring - negative) | |
5 | TX2 (TIP - positive) | |
6 | FGND (TX GND) | Ground/Shield |
7 | NC | Unused |
8 | NC | Unused |
12-11-2009 09:40 AM
Here is the show service-module and show interface for the first router The other thing is when i type show interface t1 it returns nothing. no errors stating that i typed it wrong. Just a return line and then the router# waiting for me to type something.
I really hope the SS's aren't innapropriate for the advice you are giving me. Meaning - instead of being able to see one long stream of info all you see is a interrupted sequence...
Let me know if it's a pita maybe I can figure something else out.
12-11-2009 09:46 AM
This doesn't give us much information except that the interfaces are up and should be able to ping. Capture a "show tech" from bo
th the routers and upload.
Do a "term len 0" and then turn on text capture using the instructions in the following link
http://www.cisco.com/en/US/products/hw/routers/ps233/products_tech_note09186a00800a6bc0.shtml
Once the capture is done, do a "show tech" which would dump all the information into a text file. Follow the same for the other router and upload.
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