Problem with devices releasing and renewing leases too frequently
Brian Raaen
braaen at zcorum.com
Mon Nov 5 15:11:21 UTC 2007
I have a strange problem on a few cable networks that mainly involves Belkin
devices. A cpe device with do a complete dhcp transaction
(discover/offer/request/ack) and then after it has accepted the addres it
will issue a dhcprelease and repeat the cycle. The frequency of dhcpreleases
is in the range of every 22 seconds for some devices. here is a list (most
logs only span 24 hours) of the amount of releases along with the OUI's.
34252 00:17:3f:xx:xx:xx
13800 00:11:2f:xx:xx:xx
886 00:1b:24:xx:xx:xx
349 00:13:72:xx:xx:xx
349 00:0f:b0:xx:xx:xx
92 00:17:bc:xx:xx:xx
41 00:11:50:xx:xx:xx
Doing a firmware update on one router resolved this issue. I was wondering is
anyone else was seeing this. We first noticed it while tailing the dhcplog
troubleshooting a different issue. We saw a large amount of repeated
releases from the same mac address, and investigated further.
--
Brian Raaen
Network Engineer
braaen at zcorum.com
Tel 678-507-5000x5574
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