What's my UBR IP?

[luv-snail]

Hi,

I'm trying to use Robin Walker's docsdiag program on my cable modem, which has given me no trouble in the past. However, since I have a Terayon modem, I need to use the UBR search function to discover my cable modem's ISP-side IP address. Again, this has never been a problem in the past, but right now I'm having difficulty finding the private IP address of my UBR. It used to be the first hop on an external traceroute, but now I get this:

traceroute to www.google.akadns.net (66.102.11.104), 30 hops max, 38 byte packets
1 192.168.0.1 (192.168.0.1) 0.316 ms 0.299 ms 0.239 ms
2 swan-t2cam1-a-v102.inet.ntl.com (80.0.254.9) 573.064 ms 627.056 ms 159.666 ms
3 swan-t2core-a-ge-wan61.inet.ntl.com (213.105.225.17) 9.082 ms 12.750 ms 8.707 ms
4 bir-bb-a-so-210-0.inet.ntl.com (62.253.187.237) 10.993 ms 13.136 ms 11.223 ms
...

80.0.254.9 is a public IP, so that one doesn't work. :( My default gateway is reported as 81.109.79.254, so that's not it either.

Any ideas?

[Paul]

I assume from that trace you must be going via a router - I think you will have to plug direct into the CM.

[luv-snail]

Yes, the first hop is my router, but in the past the UBR has always shown up as the second hop, and it hasn't intefered with the operation of docsdiag.

Unfortunately, I can't plug directly into the cable modem, because it's too far away from this computer, and the computer that's close to it doesn't support DHCP. :p:

Thanks for your help anyway.

[Paul]

From memory, I think ntl may have disabled some ubr facilities, which may stop docsdiag from working - on the other hand my memory may be wrong.

[jtwn]

Trying doing a tracert to your ip with this http://network-tools.com/

[JohnHorb]

From memory, I think ntl may have disabled some ubr facilities, which may stop docsdiag from working - on the other hand my memory may be wrong.
Pretty sure I read this as well, in a post by Ig or MB, I think.

[Chris W]

luv-snail, if you pm me the mac address of the modem i'll find out tomorrow morning what the ip of your ubr is.

just out of interest, why do you want to know...?

[mmm]

ntl have disabled snmp so that Robin Walker's isp side recipe for docsdiag with the Terayon modem no longer works.

I can make docsdiag work from the client side, but only when I bypass my linksys router - I could post instructions for win xp pro if you are interested


C:\software\docsdiag>jview /cp docsdiag.jar docsdiag -v
DocsDiag v030720 Copyright 2001-3 Robin Walker rdhw@cam.ac.uk

Terayon DOCSIS Cable Modem: <<HW_REV: 6.62; VENDOR: Terayon; BOOTR: NONE; SW_REV
: 1.7.14; MODEL: >>

System up time = 17 days 05h 33m 15.08s
...
IP address.192.168.100.1 = 192.168.100.1
Ethernet single-collision errs.1 = 131
Ethernet multiple-collision errs.1 = 91
Ethernet carrier sense xmit errs.1 = 9
Downstream channel ID = 0
Downstream channel frequency = 402750000 Hz
Downstream received signal power = 9.6 dBmV
Upstream channel ID = 1
Upstream channel frequency = 25584000 Hz
Upstream timing offset = 13158 units of (6.25/64) microseconds
QoS max upstream bandwidth = 64000 bps
QoS max downstream bandwidth = 300000 bps
SigQu: received without error = 1463491528 codewords
SigQu: correctable errors = 0 codewords
SigQu: uncorrectable errors = 0 codewords
SigQu: Signal to Noise Ratio = 33.8 dB
SigQu: microreflections = 24 dBc
Cable modem status = Operational
Upstream transmit signal power = 47.0 dBmV
Number of interface resets = 0
Downstream sync losses = 0
Invalid MAP msgs received = 0
Invalid UCD msgs received = 0
Invalid Ranging Responses rcvd = 0
Invalid Registration Resps rcvd = 0
T1 timer expiries = 0
T2 timer expiries = 0
T3 timer expiries = 6
T4 timer expiries = 0
Ranging Aborts = 0
Tx mini-slots used (contended).167 = 0
Tx mini-slots used (dedicated).167 = 16949963
Tx data re-tries.167 = 0
Tx data retry limit exceeded.167 = 0
Tx bandwidth req retries.167 = 6897
Tx bw req retry lim exceeded.167 = 0
Date and Time = 2005-01-09,19:35:33.0+00:00
Configuration filename = tera210x-bronze.cm

[BBKing]

To save MB the time, I'll PM you your modem IP if you PM me the MAC...

[luv-snail]

ntl have disabled snmp so that Robin Walker's isp side recipe for docsdiag with the Terayon modem no longer works.

I can make docsdiag work from the client side, but only when I bypass my linksys router - I could post instructions for win xp pro if you are interested

Ah... I guess there's no point finding my modem's IP then, since that's all I wanted it for. Thanks to monkeybreath and BBKing for offering though.

mmm, I am indeed interested, so it would be much appreciated if you could post those instructions. The main reason I want to use docsdiag is because I've recently altered my connection tier and I wanted to verify the change. I also like to use docsdiag from time to time to check the health of my connection though. Any reason why ntl have disabled SNMP?

[BBKing]

Security, it was a massive hole IMHO. Akin to slapping Gentlemen's Relish on your old fella and sticking it in a termite mound.

Myself or MB will happily check your tier for you, though. If you're very good I'll check the connection health too :)

Terajets are the only connection type you can't check yourself now, I believe.

[luv-snail]

Security, it was a massive hole IMHO. Akin to slapping Gentlemen's Relish on your old fella and sticking it in a termite mound.

Myself or MB will happily check your tier for you, though. If you're very good I'll check the connection health too :)

Terajets are the only connection type you can't check yourself now, I believe.

Heh... that's typical of my luck. I'm not too keen on getting a new modem because this one's been running for several years and it's given me no trouble whatsoever, but I'll miss docsdiag... I'm not sure why, but there's something satisfying about checking the info yourself. :p:

Ah well... my download speeds are what I would expect on this tier, and I'm not having any visible problems with my connection, so I won't trouble you with checking just yet... Thanks for offering though. :)

[mmm]

Ah... I guess there's no point finding my modem's IP then, since that's all I wanted it for. Thanks to monkeybreath and BBKing for offering though.

mmm, I am indeed interested, so it would be much appreciated if you could post those instructions. The main reason I want to use docsdiag is because I've recently altered my connection tier and I wanted to verify the change. I also like to use docsdiag from time to time to check the health of my connection though. Any reason why ntl have disabled SNMP?

The method I use is based on Robin Walker's

Recipe for use of DocsDiag with the customer-side address of the cable modem

http://homepage.ntlworld.com/robin.d.h.walker/docsdiag/#custside

I use "method 3" with Win XP PRO which doesn't involve registry editing (and seems to cope with network breaking and remaking fine)

Got to your network connection properties

Local Area Connection Status
Properties
"Internet Protocol (TCP/IP)" Properties
Advanced
Add a second IP address "192.168.100.2" with mask "255.255.255.0"

It should appear as per attachment, note my primary address is a fixed local IP as I usually connect via a Router. I have in the past used a dynamic address, and as my router has a the same mac address as my PC cloned, I was still able to use the internet (I'm pretty sure) - I can't with this IP address though!

Then connect your PC directly to the cable modem (I don't power down) by Ethernet and use the docsdiag program without extra elements

jview /cp docsdiag.jar docsdiag -v

[rdhw]

mmm: what you describe only works because you have cloned your router's MAC address to be the same as your PC's MAC address: for other people, it isn't going to work.

[mmm]

mmm: what you describe only works because you have cloned your router's MAC address to be the same as your PC's MAC address: for other people, it isn't going to work.

Now this is a very rare moment - I'm afraid I have to disagree with you Robin. The MAC address cloning together with DHCP can be used to access the internet without rebooting, but DOCSDIAG works fine and is not dependent on this.

Just to prove it to myself I reset the router (to factory defaults) to clear the MAC address clone, rebooted the Terayon cable modem to get a new IP (&updated dyndns.com so I can ping from the office) and tried again.

C:\software\docsdiag>jview /cp docsdiag.jar docsdiag -v
DocsDiag v030720 Copyright 2001-3 Robin Walker rdhw@cam.ac.uk

Terayon DOCSIS Cable Modem: <<HW_REV: 6.62; VENDOR: Terayon; BOOTR: NONE; SW_REV
: 1.7.14; MODEL: >>

System up time = 0 days 00h 05m 42.34s
...
IP address.192.168.100.1 = 192.168.100.1
Ethernet carrier sense xmit errs.1 = 6
Downstream channel ID = 0
Downstream channel frequency = 402750000 Hz
Downstream received signal power = 9.6 dBmV
Upstream channel ID = 1
Upstream channel frequency = 25584000 Hz
Upstream timing offset = 13141 units of (6.25/64) microseconds
QoS max upstream bandwidth = 64000 bps
QoS max downstream bandwidth = 300000 bps
SigQu: received without error = 10698707 codewords
SigQu: correctable errors = 0 codewords
SigQu: uncorrectable errors = 0 codewords
SigQu: Signal to Noise Ratio = 33.7 dB
SigQu: microreflections = 24 dBc
Cable modem status = Operational
Upstream transmit signal power = 46.2 dBmV
Number of interface resets = 0
Downstream sync losses = 0
Invalid MAP msgs received = 0
Invalid UCD msgs received = 0
Invalid Ranging Responses rcvd = 0
Invalid Registration Resps rcvd = 0
T1 timer expiries = 0
T2 timer expiries = 0
T3 timer expiries = 6
T4 timer expiries = 0
Ranging Aborts = 0
Tx mini-slots used (contended).167 = 0
Tx mini-slots used (dedicated).167 = 1630
Tx data re-tries.167 = 0
Tx data retry limit exceeded.167 = 0
Tx bandwidth req retries.167 = 0
Tx bw req retry lim exceeded.167 = 0
Date and Time = 2005-01-10,22:50:49.0+00:00
Configuration filename = tera210x-bronze.cm

I hope luv-snail can confirm it works for someone other than me?

I have been doing this for some time to monitor my erratic cable connection (My 6dB attenuator is in at the moment, which is how the ntl tech left it 3 years ago, but the downstream has crept up by over 6dB over this time!)- it also works when the cable modem is disconnected from ntl which is useful, but not very often.

DOCSDIAG is a great program, thanks. Any ideas on how I could get it to work client side through a Linksys Router?

[rdhw]

The MAC address cloning together with DHCP can be used to access the internet without rebooting, but DOCSDIAG works fine and is not dependent on this.Nice one, I guess this must be because the SNMP traffic does not need to cross the bridge in the modem.Any ideas on how I could get it to work client side through a Linksys Router?If the Linksys is one of the new WRT54G or GS range, which run Linux inside, then I guess you just need to flash some 3rd-party firmware (HyperWRT, or Sveasoft) which supports Telnet command-line access, then you should be able to telnet in and define additional IP addresses on the WAN interface. I have not actually done this; I'm just guessing. The new Linux-based routers from Linksys are very flexible and perform well.

[mmm]

Nice one, I guess this must be because the SNMP traffic does not need to cross the bridge in the modem.If the Linksys is one of the new WRT54G or GS range, which run Linux inside, then I guess you just need to flash some 3rd-party firmware (HyperWRT, or Sveasoft) which supports Telnet command-line access, then you should be able to telnet in and define additional IP addresses on the WAN interface. I have not actually done this; I'm just guessing. The new Linux-based routers from Linksys are very flexible and perform well.

Apologies for digging up this old thread, but I now have a WRT54GS with Hyperwrt firmware and all you have to do is issue the command

ifconfig vlan1:0 192.168.100.2 netmask 255.255.255.0

via the the router Run command and docsdiag works with default parameters


C:\software\docsdiag>jview /cp docsdiag.jar docsdiag -v
DocsDiag v030720 Copyright 2001-3 Robin Walker rdhw@cam.ac.uk

Terayon DOCSIS Cable Modem: <<HW_REV: 6.62; VENDOR: Terayon; BOOTR: NONE; SW_REV
: 1.7.14; MODEL: >>

System up time = 6 days 00h 29m 08.16s
...
IP address.192.168.100.1 = 192.168.100.1
Ethernet single-collision errs.1 = 688
Ethernet multiple-collision errs.1 = 633
Downstream channel ID = 0
Downstream channel frequency = 402750000 Hz
Downstream received signal power = 9.0 dBmV
Upstream channel ID = 6
Upstream channel frequency = 36784000 Hz
Upstream timing offset = 13182 units of (6.25/64) microseconds
QoS max upstream bandwidth = 200000 bps
QoS max downstream bandwidth = 2048000 bps
SigQu: received without error = 1239324414 codewords
SigQu: correctable errors = 1028 codewords
SigQu: uncorrectable errors = 4 codewords
SigQu: Signal to Noise Ratio = 33.1 dB
SigQu: microreflections = 24 dBc
Cable modem status = Operational
Upstream transmit signal power = 36.5 dBmV
Number of interface resets = 0
Downstream sync losses = 0
Invalid MAP msgs received = 0
Invalid UCD msgs received = 0
Invalid Ranging Responses rcvd = 0
Invalid Registration Resps rcvd = 0
T1 timer expiries = 0
T2 timer expiries = 0
T3 timer expiries = 3
T4 timer expiries = 0
Ranging Aborts = 0
Tx mini-slots used (contended).594 = 0
Tx mini-slots used (dedicated).594 = 32887094
Tx data re-tries.594 = 0
Tx data retry limit exceeded.594 = 0
Tx bandwidth req retries.594 = 59086
Tx bw req retry lim exceeded.594 = 21
Date and Time = 2006-02-23,22:37:39.0+00:00
Configuration filename = cmreg-tera210x-mid.cm

[Graham M]

Helpful Info, repped :)