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uDHCP Renew Interval

Discussion in 'Tomato Firmware' started by asterger, Jun 17, 2008.

  1. asterger

    asterger Network Guru Member

    Hello,

    I'm using Tomato v1.19.1463. Perhaps this issue has already been dealt with. From syslog, it appears Busy Box is requesting a renew every 12 hours versus the requested 86400 (24 hour) lease time. Is this a bug?

    -- asterger

    Jun 15 21:02:46 unknown local0.info udhcpc[2465]: Lease of 65.188.243.228 obtained, lease time 86400
    Jun 15 23:52:02 unknown user.info ntpc[3210]: Time Updated: Sun, 15 Jun 2008 23:52:02 -0400 [+1s]
    Jun 16 03:52:02 unknown user.info ntpc[3236]: Time Updated: Mon, 16 Jun 2008 03:52:02 -0400 [+1s]
    Jun 16 05:52:02 unknown user.info ntpc[3249]: Time Updated: Mon, 16 Jun 2008 05:52:02 -0400 [+1s]
    Jun 16 09:02:49 unknown local0.debug udhcpc[2465]: Sending renew...
    Jun 16 09:02:49 unknown local0.info udhcpc[2465]: Lease of 65.188.243.228 obtained, lease time 86400
    Jun 16 09:52:03 unknown user.info ntpc[3276]: Time Updated: Mon, 16 Jun 2008 09:52:03 -0400 [+2s]
    Jun 16 13:52:02 unknown user.info ntpc[3328]: Time Updated: Mon, 16 Jun 2008 13:52:02 -0400 [+1s]
    Jun 16 15:52:03 unknown user.info ntpc[3341]: Time Updated: Mon, 16 Jun 2008 15:52:03 -0400 [+2s]
    Jun 16 19:52:03 unknown user.info ntpc[3371]: Time Updated: Mon, 16 Jun 2008 19:52:03 -0400 [+1s]
    Jun 16 21:02:55 unknown local0.debug udhcpc[2465]: Sending renew...
    Jun 16 21:02:56 unknown local0.info udhcpc[2465]: Lease of 65.188.243.228 obtained, lease time 86400
    Jun 16 21:52:03 unknown user.info ntpc[3385]: Time Updated: Mon, 16 Jun 2008 21:52:03 -0400 [+1s]
    Jun 16 23:52:02 unknown user.info ntpc[3398]: Time Updated: Mon, 16 Jun 2008 23:52:02 -0400 [+1s]
    Jun 17 01:52:02 unknown user.info ntpc[3411]: Time Updated: Tue, 17 Jun 2008 01:52:02 -0400 [+1s]
    Jun 17 03:52:02 unknown user.info ntpc[3424]: Time Updated: Tue, 17 Jun 2008 03:52:02 -0400 [+1s]
    Jun 17 05:52:02 unknown user.info ntpc[3437]: Time Updated: Tue, 17 Jun 2008 05:52:02 -0400 [+1s]
    Jun 17 09:03:00 unknown local0.debug udhcpc[2465]: Sending renew...
    Jun 17 09:03:00 unknown local0.info udhcpc[2465]: Lease of 65.188.243.228 obtained, lease time 86400
     
  2. PeterT

    PeterT Network Guru Member

    DHCP renewals start to occur at 1/2 the remaining lease time. If the DHCP server is not reachable at thaty point, the next renewal will be in 1/2 the remaining time (ie after an additonal 1/4 of the original lease time).
     

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