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11147
February 8th, 2008 11:00
DHCP Improvements
Hi all, we have a basic setup with 4 powerconnect 6248 switches daisy chained together. we have our DC that is also a DHCP server. when a client requests an address it takes ages for it to be assigned.
is there anything on the switches that i can change that may improve this?
thanks
Nigel
is there anything on the switches that i can change that may improve this?
thanks
Nigel
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sentinel-master
345 Posts
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February 9th, 2008 14:00
Just to narrow the likely causes - can you claify these poitns please :
I presume that client PC's have fastlink enabled on the switch ports ?
I also presume that you have sufficent DHCP Scope addresseds in your subnet range ?
Are you sure you are getting a real IP address assigned to your client PC's - i.e from your expected scope ?
It may be that you think its taking a long time and actually its failing DHCP and going to Auto-DHCP 192.168.x.x without a default gateway assigned.
Once your client PC's get an assigne IP address do they have email/web connectivity okay ?
NigelRobson
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February 10th, 2008 12:00
what seems to happen at the moment is that the client waits for an address for maybe 1-2 minutes and then eventually gets one. after this they have full connectivity to the web / email
Nigel
sentinel-master
345 Posts
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February 10th, 2008 13:00
Yes enable fastlink for client PC or Server ports on your switches -this will move the port on the switch straight to forwarding.Thus saving you 30-45secs of time.
Do NOT enable fastlink on switch-switch or switch to router connections though.
NigelRobson
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February 10th, 2008 19:00
excellent, i'll give that a go and let you know how it goes
thanks for the help
Nigel
si10842
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February 16th, 2008 07:00