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Modem Reboots on High Activity

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I have Comcast Internet, Win XP and a D-Link Router.

Whenever I am gaming or file-sharing, the modem will reboot itself. All of the lights go off, but it always reconnects in a minute or so. I have done all the ping tests as suggested in other threads like this and haven't seen any problems, so I think its either the modem or the cable wiring itself.

Motorola Surfboard 3100

Frequency 723000000 Hz Locked
Signal to Noise Ratio 35 dB
Power Level -8 dBmV

Upstream Value
Channel ID 9
Frequency 31600000 Hz Ranged
Power Level 42 dBmV

The Log:

061103200313 8-Debug M570.2 Motorola CM certificate present
061103200313 8-Debug M571.7 CM Cert Upgrade Enabled. AutoRun after Reg or via SNMP
061103200313 8-Debug I503.0 Cable Modem is OPERATIONAL
061103200313 7-Information B401.0 Authorized
061103200312 8-Debug F502.1 Bridge Forwarding Enabled.
061103200312 8-Debug F502.3 Bridge Learning Enabled.
061103200312 7-Information B0.0 Baseline Privacy
061103200311 7-Information X518.9 Configuration - GGFMMD - Unit Update Enabled by CVC
061103200311 8-Debug I500.1 DOCSIS 1.0 Registration Completed
061103200311 7-Information I500.4 Attempting DOCSIS 1.0 Registration
061103200311 7-Information D509.0 Retrieved TFTP Config File SUCCESS
061103200311 7-Information D507.0 Retrieved Time....... SUCCESS
************ 7-Information D511.0 Retrieved DHCP .......... SUCCESS
************ 5-Warning D3.0 DHCP WARNING - Non-critical field invalid in response
************ 4-Error D530.8 DHCP - Invalid Log Server IP Address.
************ 5-Warning D520.2 DHCP Attempt# 1 BkOff: 5s Tot DSC:1 OFF:1 REQ:1 ACK:1
************ 7-Information D0.0 DHCP CM Net Configuration download and Time of Day
************ 7-Information T500.0 Acquired Upstream .......... SUCCESS
************ 8-Debug T503.1 Acquire US with status OK, powerLevel 43, tempSid 6759
************ 8-Debug T505.0 Acquired Upstream with status OK
************ 3-Critical R2.0 No Ranging Response received - T3 timeout
************ 7-Information T501.0 Acquired Downstream (723000000 Hz)........ SUCCESS
************ 8-Debug T509.0 Acquired DS with status OK, DS Freq 723000000, US Id 9
************ 7-Information I510.0 *** BOOTING *** SB3100-
061103200237 7-Information H501.2 HFC: Shutting Downstream Down
061103200237 2-Alert T507.0 Received Async Error Range Failed
061103200236 3-Critical R4.0 Received Response to Broadcast Maintenance Request, but no Unicast Maint
061103200236 3-Critical H501.8 HFC: T4 Timer Expired

That T4 error always happens at reboot. Any thing I can do to fix this?
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Transmits and noise are better than mine.... check with your ISP and see if they have bandwidth caps that they enforce or what the lease time is on thier IP address's... see this:

************ 5-Warning D3.0 DHCP WARNING - Non-critical field invalid in response
************ 4-Error D530.8 DHCP - Invalid Log Server IP Address.
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I'll look into it. Thanks. :whistling:
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