Setting date and time on the D-Link DSL-500B

Recently I noticed a problem on my Speedy, conexão rapid stay each 5 minutes, My modem was a D-Link DSL-500G and the router is a separate 3Com 3CRWER200-75. I noticed that the falls were fast and the router was not even losing IP, in other words, the fall was restricted to ADSL and ATM protocols, used to connect the modem and Telefonica Central. The report errors appeared that way:

Mon Jul 21 14:36:46 2008 : STATUS ALARM : ATM VC Up : Interface - aal5-0, PortId = 7, Vpi=8, Vci = 35
Mon Jul 21 14:36:46 2008 : STATUS ALARM : ATM Interface Up : Interface - ATM-0
Mon Jul 21 14:36:46 2008 : STATUS ALARM : DSL Interface Up
Mon Jul 21 14:36:29 2008 : WARNING : ATM VC Down : Interface - aal5-0, PortId = 7, Vpi=8, Vci = 35
Mon Jul 21 14:36:29 2008 : MAJOR ALARM : ATM Interface Down : Interface - ATM-0
Mon Jul 21 14:36:29 2008 : MAJOR ALARM : DSL Interface Down
Mon Jul 21 14:31:27 2008 : STATUS ALARM : ATM VC Up : Interface - aal5-0, PortId = 7, Vpi=8, Vci = 35
Mon Jul 21 14:31:27 2008 : STATUS ALARM : ATM Interface Up : Interface - ATM-0
Mon Jul 21 14:31:27 2008 : STATUS ALARM : DSL Interface Up
Mon Jul 21 14:31:10 2008 : WARNING : ATM VC Down : Interface - aal5-0, PortId = 7, Vpi=8, Vci = 35
Mon Jul 21 14:31:10 2008 : MAJOR ALARM : ATM Interface Down : Interface - ATM-0
Mon Jul 21 14:31:10 2008 : MAJOR ALARM : DSL Interface Down

I thought it could be a modem problem, then lent a D-Link DSL-500B, latest model and how to support ADSL2 / 2 , for testing and the problem did not occur to him, so I decided to buy a. The problem was resolved, I entered the configuration and one of the first things I did was turn on logging, that contrary to what happens in 500G, is disabled by default in 500B. Enabled the log saw that appeared several error messages like the one below, curiously also every 5 minutes:

Jan 1 00:04:53      user      crit      kernel: OAM loopback response not received on VPI/VCI 8/35.

I do not understand what exactly is this response, but it seems that the problem is in the central Telefonica, that is no longer responding to this request that the modem is, the difference is that in this situation the DSL-500G think the timing is gone and synchronize again (losing precious packages this time) while the DSL-500B only notes a critical error in the log, but takes no action, in other words, stays connected and does not lose any package.

Summarizing: thanks to incompetence of Telefonica had to buy another modem. Obviously trying to explain such a problem for attendants 10315, fully lay and poorly trained, is impossible, certainly would not understand anything and would blame it on anything else.

Made this huge introduction let the subject title, one of the things I noticed immediately the DSL-500B is that there was no option in the web interface menu to set the date and time, something totally foreign, visto que o modem usa a data e a hora no log, and it is ridiculous to be reading errors with date / time totally wrong. I thought that might be the firmware, then changed the firmware that came in modem (of Brazil Telecom) by Telefonica, first an older version, after a younger, has no option to set date and time, and interestingly the younger also removed the SNMP service, certainly to save memory for more TCP and UDP connections for those who use this modem as router, since it is a classic problem of D-Link does not have enough memory to handle P2P (Emule and related) and conk out in these situations.

Looking at DSL-500B simulator on the D-Link website missed one more thing, o item “Internet Time” do menu, another who was eliminated from the current firmware for the service was not enabled and thus economise more memory, as do a recall of all modems to put more memory obviously is not foreseen by the D-Link. But digging a little I found that honed functions were only excluded from the web interface menu, but are still accessible by directly typing the URL of the configuration page. So to configure the SNMP simply access: (if you do not use the modem standard IP remember to change the IP in the URL you are using)

And to access the Internet Time, just access: (if you do not use the modem standard IP remember to change the IP in the URL you are using)

Note that I did the tests with the latest firmware Telefonica, just do not know if this applies to firmware from other providers, but believe so. So who uses the modem as a router can use SNTP to synchronize date / time with any server, But remember that the SNTP service occupies more of the scarce memory of this modem (2,8% work, according to tests I did) and this may impair the use of P2P. For those who use the modem as bridge no use using the SNTP, since the modem does not have direct internet access, so you need to set the date and time manually, but as?

The secret is to access the modem Telnet, it goes step-by-step: (forgive me the most advanced users)

1) Access the telnet client, in Windows type “Telnet” (no quotes) the Command Prompt or the Run menu (Windows Key + R)
2) Type “open” (or IP configured on your modem)
3) Please enter your login and password (the default is 'admin', both as to the login password)
4) Will show a prompt, now type “sh” to enter the BusyBox shell, where we have some UNIX commands available (see all of them using 'help')
5) Now utize the command “date”, where MM is the month, DD is the day, hh are the hours, mm is the minute, YYYY is the year 4 digits and ss is the second, for example: use “date 072323152008.50” to set the date for 23/07/2008 and the time for 23:15:50.

And ready, date and time will be set and the logs will appear with the correct date and time. The first two digits of the year and the latter may be omitted, type “date –help” to view the possible syntaxes and other options.

Remember that before you poke around and figure it out alone tried Technical Support D-Link, first in the chat, where after much ado sent me the link 0800, and then the 0800 also wrapped and then told me that there was no such option, that could not set date and time, as absurd as it may seem, including an attendant said that the “Internet Time” used to configure what time the modem should connect/disconnect, in other words, she was totally wrong and not know the company's product.

The method put here, although functioning perfectly, does not redeem the D-Link, who stepped fully on the ball by not including an option from the web menu to change date / time, something available to the DSL-500G, senior. And also screwed up the filing modem resources to compensate the poor design that saved in RAM.

Completing, the upgrade would be necessary if Telefonica worked well, since my Speedy is 2Mbps (Metro network) and do not need ADSL2 / 2 . And despite all the reservations the DSL-500B is working well here, in so “bridge”, as never liked D-Link router, since returned one DI-624 on the same day I bought enough to see that connect the Emule he restarted without stopping.

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Rafael Guedes

Dear colleague you've used in the snmp 500b? I'm trying to monitor my router with MRTG on Ubuntu 8.04 , but so far without success… I was thinking about calling the D-Link.. But after your comments will be difficult…. A hug

Yuri Cezar

Olá Rafael,
Since Thursday, 09/10, I and some neighbors started having this same ADSL signal loss problem of 5 in 5 minutes, invariably starting after business hours and only normalizing the next morning.
We are within range of Hi Velox (Telefonica was not the privilege :), and know exactly what you feel about service “specialized” we get from Central and “Technical”. No one was able to identify the problem. This amazes me, because pesquisarmos “ADSL 5 minutes” Google will see the amount of people in the same situation, soon as both Hi Telefonica should have built something of their occurrence.
At the other end is D-Link that does not provide a firmware update, even with their consisting modems 100% messages with this complaint.

I was afraid to buy another modem and continue with the same problem, but after I turn on some reviews, especially your text above, I'm saying goodbye to my DSL-502G today. Probably picked up one Speedstream 4200 or, who knows, o DSL-500B.

abração, e obrigado por ter escrito 🙂

Yuri Cezar

P.S.: Read up “Hello Fabricio !” 🙂

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