Tarhon-Onu Victor wrote:
On Sat, 15 Apr 2006, lug wrote:
Cum se procedeaza in cazul in care ai mai multe downstreamuri?
Din cite stiu eu, modemurile nou introduse in retea cauta primul
downstream disponibil. Odata gasit, modemul ramine fixat pe acea
frecventa.
Daca nu reuseste sa discute si pe upstream cu cmts-ul atunci va trece
la urmatoarea frecventa de downstream disponibila. E bine ca sa-ti
grupezi cumva modemurile si sa le dai frecventele in fisierul de boot.
Prima data cind se vor sincroniza le va lua mai mult, insa dupa ce-si
iau fila de boot, in cazul unei desincronizari le va lua sensibil mai
putin sa gaseasca ce au nevoie.
Multumesc de raspunsuri celor care au incercat sa ma ajute.
In primul rind, noi avem o retea functionala. Ce-am avut pina acum era
un arris cu 1 ds si 6 us. A functionat si functioneaza perfect. Problema
era alta. Daca mai introduc un alt cisco in aceeasi retea fizica RF, pe
alta frecv, un modem cu configuratia pe care o s-o scriu mai jos ramine
tot pe vechea frecventa, pina in init(d). Modemul pe care am facut test
are un upstream atit pe o frecv pe arris, cit si o frecv de ups pe
cisco. Pe arris merge perfect. Daca incerc sa-l trec pe cisco, nu pot.
Ramine pe arris, el deja functionind pe frecv acestuia de ds. Am gasit
un link pe cisco, dar n-am apucat sa probez.
Zice asa:
(http://www.cisco.com/en/US/tech/tk86/tk89/technologies_white_paper09186a008025c169.shtml)
Problem � Already Provisioned, but a Different DS Frequency is Wanted
Other than the Original
Issue the *shut* command and then issue the *no shut* command on the
interface; or clear all of the modems, to reload a new DOCSIS
configuration file with the specific DS frequency. Other ways to force
the modem to download its new configuration file are to issue the *cable
modem change-frequency* command or to clear the cable modems one at a
time. You might need to make the new configuration file a different name
then what was used originally.
Solution
To force a modem to use a different DS frequency, issue this command:
ubr7246-2# *cable modem 003.e350.97f5 change-frequency ?*
<54000000-1000000000> Downstream Frequency in Hz
Iata si fisierul de config pt modem (old ds pe 647,25, new ds 755,25)
Main
{
DownstreamFrequency 655250000;
UpstreamChannelId 0;
NetworkAccess 1;
ClassOfService
{
ClassID 1;
MaxRateDown 40000000;
MaxRateUp 10000000;
GuaranteedUp 16000;
MaxBurstUp 3036;
}
MaxCPE 5;
SnmpMibObject docsDevNmAccessStatus.1 Integer 5; /* createAndWait */
SnmpMibObject docsDevNmAccessIp.1 IPAddress xxx ;
SnmpMibObject docsDevNmAccessIpMask.1 IPAddress 255.255.255.255 ;
SnmpMibObject docsDevNmAccessCommunity.1 String "cm-public-community-1" ;
SnmpMibObject docsDevNmAccessControl.1 Integer 2; /* read */
SnmpMibObject docsDevNmAccessStatus.1 Integer 1; /* active */
SnmpMibObject docsDevNmAccessStatus.2 Integer 5; /* createAndWait */
SnmpMibObject docsDevNmAccessIp.2 IPAddress xxx ;
SnmpMibObject docsDevNmAccessIpMask.2 IPAddress 255.255.255.255 ;
SnmpMibObject docsDevNmAccessCommunity.2 String "rmtqryinfo" ;
SnmpMibObject docsDevNmAccessControl.2 Integer 2; /* read */
SnmpMibObject docsDevNmAccessInterfaces.2 String "0xC0" ;
SnmpMibObject docsDevNmAccessStatus.2 Integer 1; /* active */
SnmpMibObject docsDevFilterIpDefault.0 Integer 2; /* accept */
}
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