I am working with a customer who has a Cisco CMTS uBR7246 with a DOCSIS Modem card that has 1 Down and 6 up.
Up until two months ago he said everything was working fine. Then suddenly, everything started running slow. (Of course he claimed nothing was changed!)
I am testing the CMTS with a client machine (connected to a modem) sending and receiving data to/from a server that is connected to the ethernet interface of the CMTS. If the QOS for the downstream is set to
10M, I get about 2M. If it is set to 1M, I get about 512K. Upstream values are working correctly.The customer has a cold standby uBR with the same hardware, so I set it up with the same configuration, using a separate diplex filter and quam to hook it to 3 test cable modems. I got the same result.
I suspect there is something freaky in the configuration, but I cannot find it. If anyone can help, I would appreciate it!
Configurations are below.
TIA!!!!
====portscanner(A)dontsendmeviagraidontneedit(D)charterinternet(D)com============
===== Cable Modem Configuration ================== Main { NetworkAccess 1; ClassOfService { ClassID 3; MaxRateDown 10485760; MaxRateUp 1048576; PriorityUp 7; GuaranteedUp 0; MaxBurstUp 0; PrivacyEnable 0; } MaxCPE 7; }
====ubr7200 config========================= ! version 12.0 service timestamps debug uptime service timestamps log uptime service password-encryption ! hostname standby7200 ! enable password 7 ******************* ! cable spectrum-group 1 frequency 24000000 cable modulation-profile 2 request 0 16 1 8 qpsk scrambler 152 no-diff
64 fixed uw16 cable modulation-profile 2 initial 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed uw16 cable modulation-profile 2 station 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed uw16 cable modulation-profile 2 short 6 75 6 8 16qam scrambler 152 no-diff 144 fixed uw8 cable modulation-profile 2 long 8 220 0 8 16qam scrambler 152 no-diff 160 fixed uw8 cable modulation-profile 8 request 0 16 1 8 qpsk scrambler 152 no-diff 64 fixed uw16 cable modulation-profile 8 initial 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed uw16 cable modulation-profile 8 station 5 34 0 48 qpsk scrambler 152 no-diff 128 fixed uw16 cable modulation-profile 8 short 6 75 6 8 16qam scrambler 152 no-diff 144 fixed uw8 cable modulation-profile 8 long 8 220 0 8 16qam scrambler 152 no-diff 160 fixed uw8 no cable qos permission create no cable qos permission update cable qos permission modems cable time-server clock timezone EST -4 ip subnet-zero ip cef ip dhcp-server 172.16.1.15 ! ! ! interface FastEthernet0/0 ip address 172.16.1.3 255.255.255.0 ip helper-address 172.16.1.15 no ip directed-broadcast no ip mroute-cache full-duplex ! interface Cable3/0 ip address 10.255.255.1 255.255.255.0 secondary ip address 10.255.254.1 255.255.255.0 ip directed-broadcast ip helper-address 172.16.1.15 no ip mroute-cache no keepalive cable dhcp-giaddr primary cable downstream rate-limit token-bucket shaping cable downstream annex B cable downstream modulation 64qam cable downstream interleave-depth 32 cable downstream frequency 675000000 cable upstream 0 frequency 24000000 cable upstream 0 power-level 0 cable upstream 0 modulation-profile 2 no cable upstream 0 shutdown cable upstream 1 frequency 24000000 cable upstream 1 power-level 0 no cable upstream 1 shutdown cable upstream 2 frequency 24000000 cable upstream 2 power-level 0 no cable upstream 2 shutdown cable upstream 3 frequency 24000000 cable upstream 3 power-level 0 no cable upstream 3 shutdown cable upstream 4 frequency 24000000 cable upstream 4 power-level 0 cable upstream 4 modulation-profile 2 no cable upstream 4 shutdown cable upstream 5 frequency 24000000 cable upstream 5 power-level 0 no cable upstream 5 shutdown ! ip classless ! snmp-server engineID local 0000000902000002FC845400 snmp-server community ciscosnmp RW snmp-server community public view v1default RO snmp-server community ralph RO snmp-server trap-source FastEthernet0/0 snmp-server location nu snmp-server enable traps isdn call-information snmp-server enable traps hsrp snmp-server enable traps config snmp-server enable traps entity snmp-server enable traps envmon snmp-server enable traps cable snmp-server enable traps bgp snmp-server enable traps frame-relay snmp-server enable traps rtr snmp-server host 172.16.1.15 version 2c public ! ! line con 0 password 7 ********************** transport input none line aux 0 line vty 0 4 password 7 ********************** login ! end ===========================================================