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Chatter about DOCSIS, provisioning, networks, and CMTS gear.

Two different Subnets over one modem

Forums: 

Hello,
We are providing a village in Austria (Europe) with cable internet.

We are looking forward to set up following situation.
We want to tell the headend (3com), that over one cable modem two different computers should be provided with to different subnets.
Computer a should get an ip with 194.208.52.x with the gateway 194.208.52.1 and computer b should get 192.168.5.x with the gateway 192.168.5.1

Both computers should work behind the same modem and should get different ip nets.

D1.1 Service Flow OIDs

Forums: 

Can anyone tell me whag the OIDs are that relate to D1.1 Service Flow information?

Problems with tftp config files

Forums: 

sorry for my English, I am of Argentinean and I have difficulties with the language.
I have a problem, the cable modems takes the configuration file they get up but when I prove the speed it doesn't correspond with the limitations of speed of the files in the tftp, example next

Main
{
NetworkAccess 1;
ClassOfService
{
ClassID 1;
MaxRateDown 1000;
MaxRateUp 10000;
PriorityUp 1;
GuaranteedUp 10000;
MaxBurstUp 0;
PrivacyEnable 0;
}
MaxCPE 16;

}

Cable Modem with PPPoE feature

Forums: 

Hi list,

Does anyone know if there is any Cable Modem Residential Gateway which supports PPPoE?

Thanks,

Astrit

Clients/Hosts send DHCPREQUEST to DHCP Server continualy.

Forums: 

Hello! Here is DHCP Server's MRTG below:

You can see that the DHCP server traffic is bursting to 700Kbps since 140Kbps before! I has found several CPEs which in abnormal status(Sending DHCPREQUEST continualy), but I don't know how to resolve this case.

Before posted this message, I had tried reseting CMs what these abnormal CPEs belong to and restarting DHCP daemon several times, but it's no work!
Does anyone tell me kindly what should I do next ?
:(

Modem Rejected by CMTS

Forums: 

Hi list,

I've a very strange problem. I was trying to set 3 different TLVs in CM config file like the below:

VendorSpecific
{
VendorIdentifier 0x000304; ( Juniper CMTS)
GenericTLV TlvCode 1 TlvLength 2 TlvValue 0x0259; (VLAN 601)

VendorSpecific
{
VendorIdentifier 0x0000ca; (Arris CMTS)
GenericTLV TlvCode 1 TlvLength 2 TlvValue 0x0259; (VLAN 601)

C3 CARDAN

Forums: 

i try to configure scdam on C3 cardan but i don't have a good result. Below the message i obtain when trying to configure docsis 2.0:

C3#
C3#conf ter
C3(config)#int c1/0
C3(config-if)#cab
C3(config-if)#cable up
C3(config-if)#cable upstream 0.0 ch
C3(config-if)#cable upstream 0.0 channel-ty
C3(config-if)#cable upstream 0.0 channel-type s
C3(config-if)#cable upstream 0.0 channel-type scdma
SCDMA not currently licensed - contact Arris support
SET for US channel type failed

TCM420 SNMP community !?

Forums: 

Hi all ...

I was wondering if there's a way on reseting the modem devices in a catv network. Googling a lil got me over .1.3.6.1.2.1.69.1.1.3 ... so .. I tried doing this ... I'm the administrator of the dhcp server .. so I can create new boot files for the modems and stuff ..

snmpset -v2c -r1 -c public 10.0.0.240 .1.3.6.1.2.1.69.1.1.3 i 1
Error in packet.
Reason: notWritable (That object does not support modification)
Failed object: SNMPv2-SMI::mib-2.69.1.1.3

figured that the "public" community isn't allowed to write .. ok .. question is:

UDP traffic limitation in DOCSIS

Forums: 

Hi!

We using some DOCSIS 2.0 CMTS, Arris C3 and Terayon. The problem is, we are not limiting the UDP traffic behind the cable modem.
Example:
If we setting the max downstream speed in the cable modem configuration file 4048000 Bit/Sec when the TCP traffic is about ok. But if we try the iperf with UDP option (UDP server - UDP clients) the UDP traffic is 30MBit/Sec!

Please help me anybody, how can I limit the UDP traffic!

THX...

Sorry my poor english.

gyu

Bridging vs routing

Forums: 

Hello,
Anybody experienced such transitions (bridging -> routing or routing -> bridging) for a cmts? I would like to have some impressions.
I just replaced a npe-400 with a npe-g1 and I think i can further reduce the processor load by putting the cmts in bridging mode.
For an ubr7246vxr with a npe-g1 I have about 43% processor load at peak hours.
1800 modems, speeds from (up/down) 128/512 to 256/2048.

thanks

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