WNDR4000 DNSMasq - cache-size breaks DHCP Leasing

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XxUnkn0wnxX
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Joined: 10 Aug 2015
Posts: 39

PostPosted: Tue Aug 11, 2015 16:52    Post subject: WNDR4000 DNSMasq - cache-size breaks DHCP Leasing Reply with quote
well i am on r27600

and so far everything is working but when try to use cache-size and i do DHCP renew lease on my Client Computer it takes around 2-3 min to apply..

i looked around the forums regarding DHCP lease issues and i haven't found an answer for this. (including older Revisions)

tested older revision such as r27506 - same issue
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jwh7
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Joined: 25 Oct 2013
Posts: 2562
Location: Indy

PostPosted: Tue Aug 11, 2015 19:09    Post subject: Re: WNDR4000 DNSMasq - cache-size breaks DHCP Leasing Reply with quote
http://svn.dd-wrt.com/ticket/4702
I thought that sounded familiar...
KrypteX/Specimen/Kong; any more thoughts/updates on this?

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XxUnkn0wnxX
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Joined: 10 Aug 2015
Posts: 39

PostPosted: Tue Aug 11, 2015 19:55    Post subject: Reply with quote
?

so in newer versions the cache-size cannot be added coz it already in the config?

how then am i supposed to override the default? edit the conf file itself? + i haven't been able to find it via telnet etc folder it not there..
JAMESMTL
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Joined: 13 Mar 2014
Posts: 856
Location: Montreal, QC

PostPosted: Wed Aug 12, 2015 1:48    Post subject: Reply with quote
well you can always modify the conf file and restart dnsmasq with a startup script

sleep 10
sed -i '/cache-size/d' /tmp/dnsmasq.conf
echo 'cache-size=5000' >> /tmp/dnsmasq.conf
killall dnsmasq
dnsmasq -u root -g root --conf-file=/tmp/dnsmasq.conf

do not restart the service as it will recreate the config file. you need to modify, kill and restart.


FYI /etc is read only

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jwh7
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Joined: 25 Oct 2013
Posts: 2562
Location: Indy

PostPosted: Tue Dec 01, 2015 22:04    Post subject: Reply with quote
XxUnkn0wnxX wrote:
so in newer versions the cache-size cannot be added coz it already in the config?
I suppose this thread should be updated (for others searching) based on the 28397 build:
KrypteX wrote:
Changelog excerpt from http://www.dd-wrt.com/phpBB2/viewtopic.php?t=279467
    [...]
    [388] Mod: DNSMasq cache-size adjustable
For this:
In SVN 4956, Kong wrote:
tatsuya46 wrote:
r28393 cache-size is missing from dnsmasq.conf unless its manually entered, dnsmasq site* says default is 150 when not overridden. if i didnt specify a cache-size & default for ddwrt is still 1500, shouldnt it be in the config as 1500?
we set cache-size now through commandline argument, config params override commandline params
*Ref:
dnsmasq wrote:
-c, --cache-size=<cachesize>
Set the size of dnsmasq's cache. The default is 150 names. Setting the cache size to zero disables caching.

_________________
# NAT/SFE/CTF: limited speed w/ DD # Repeater issues # DD-WRT info: FAQ, Builds, Types, Modes, Changes, Demo #
x64 OPNsense 20.7|FT2020.4: EA6900v1.1@1GHz, F7D8302@532|DD 44062: DIR-810L, WNDR4500v2 & 4000@533,
R6300v1, RT-N66U@663, E1500@353, WRT54G{Lv1.1,Sv6}@250
|OpenWRT 19.7.3: RT-ACRH13, R6220, WNDR3700v4
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