DHCP assign & De-assign

RouterOS General
1

Hi there,

what is the meaning of DHCP assign & De-assign?,is it will effect my office network,sometimes certain people got internet and certain people not..I check the Log..is show DHCP assign & De-assign

Please advice… -Newbie-
Untitled.png

2

I had problems with that, but I haven’t seen it lately since upgrading the RouterOS. The problem was the dhcp server was not updating the lease “expires-after” value when a lease was renewed. You might want to check that.

/ip dhcp-server lease
print detail

The sum of the last-seen and expires-after values should equal the lease time. If they don’t (like the sum equals half the lease time) you may need to upgrade to a newer version of RouterOS.

edit: This happens only after a lease renewal, so you will see this every other renewal. The initial lease issue will work ok. The first renew will work ok from the client end, but the dhcp server will have the incorrect expires-after value. At this point, the sum of the last-seen and expires-after will be half the lease time.

The lease will expire a second or two before the next client renewal, so you get a deassign message. Then the client will renew the lease again, and you get the assign message. At this point, the sum of the last-seen and expires-after will be the full lease time again.

3

Thank you with Noted…so it’s nothing to do with Network Intermitent right?

I have one issue with my company…the Network unable to route nicely in certain-certain time…When this happen,the internet at the end user network adapter is connected but at the browser not load the internet…for all user…

4

Set longer lease interval. Mikrotik did silly thing: they changed default 3d interval to new default 10mins in one of last releases. Set 3d back and be happy.