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01-10-2011 03:30 PM
01-10-2011 03:30 PM
4800g vlan and DHCP server
Ok history first I have a current network
with 2 older 4880 switches with a Vlan
Switch one is the core switch 192.168.160.X core 2 has a vlan 192.168.161.x
The Dhcp server is on a windows 2008 machine
I used the udp helper on the vlan switch and the vlan Pcs get there ip numbers from the dhcp server on the windows machine.
We are replaceing the current switchs with new 4800G with 10 gig connection
So I need to set up the new 4800G swatches and I find that the gui is missing
many many features most importantly the udp helper.:smileysad:
I can't figure out how to get the 192.168.161.X vlan network to get to the dhcp server 192.168.160.14
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01-13-2011 02:24 AM
01-13-2011 02:24 AM
Re: 4800g vlan and DHCP server
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01-13-2011 11:46 AM
01-13-2011 11:46 AM
Re: 4800g vlan and DHCP server
i will look but the book for the 4800g says that the udp helper does not do the ports for dhcp servers
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01-13-2011 12:05 PM
01-13-2011 12:05 PM
Re: 4800g vlan and DHCP server
Suppose that the win2008 dhcp server is in the net 192.168.160.X and its ip address is 192.168.160.100 THEN:
system-view
dhcp enable
dhcp relay server-group 1 ip 192.168.160.100
interface vlan-interface 160
dhcp select relay
dhcp relay server-select 1
That is it!
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04-25-2013 03:10 PM
04-25-2013 03:10 PM
Re: 4800g vlan and DHCP server
Mr. krbaugh, how are you?
I am having some problems with DHCP and a switch 3com 4800g, the difference is
my DHCP server is still a Win 2003 Server and not a 2008 like yours.
Can you share some insight as to how your infrastructure is set up?
I attached an image of what I am trying to set up. I have configured the IPs of the interfaces,
the default route and the relay on port 2. I have also set port 2 as trunk in order to have all traffic
from all other vlans go through it.
I am able to ping each individual interface with a host in the same network. Except the trunk interface.
I cannot reach any other interface but the one I am connected to and as a result I cannot get an IP address
from the AD. Anything you can share would be helpful.
Thanks.
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05-01-2013 08:01 PM
05-01-2013 08:01 PM
Re: 4800g vlan and DHCP server
Port 2 shouldn't be a trunk, and the DHCP "ip helper" needs to be on the routing interface for the subnet the request is coming from - ie, the supplicant's default gateway.
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