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03-17-2014 12:18 PM - last edited on 03-23-2014 07:46 PM by Lisa198503
03-17-2014 12:18 PM - last edited on 03-23-2014 07:46 PM by Lisa198503
DHCP Problem with 2 V1910
I am Having a problem, I interconnect 2 offices with comcast fiber poin to point, I have 1 v1910 with ip's 192.168.1.0/24 on vlan1, a second vlan10 192.168.100.1 on the same switch and a FTP server win2000 and a Domain controller and DHCP server 2008, at the other end I have a switch v1910 with 2 vlans, vlan 1 192.168.3.0/24 and a vlan 10 192.168.100.2, the interconnect each other through vlan10 and I have a DHCP DC and DATA server at the 192.168.3.0/24 network , my problem is that sometimes my computers at 192.168.1.0 network get ip's from the DHCP 192.168.3.0 network and viceversa, the computers still connect but are using Internet from different sites and is slow to access their own server,
So Haw can I stop or configure the switch to block DHCP requests from other site and keep looking and connecting to their own segment?.
I am new in procurve configuration switches, Any HELP will be much appreciated.
THX in advance
P.S. This thread has been moved from ProCurve / ProVision-Based to Web and Unmanaged. -HP Forum Moderator
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03-20-2014 05:53 AM
03-20-2014 05:53 AM
Re: DHCP Problem with 2 V1910
Hi Miguel,
From what you are saying it looks like you have no router in between the two networks. I would suggest that you setup an ACL to block udp 67 from going across the p-t-p connection on each of the switches.
The other way of doing this is to have your two switches setup to enable routing and have the p-t-p connection on another VLAN which will then stop all broadcast traffic from traversing the p-t-p link. This is obviously the more time consuming option - as long as your 1910 switches can do layer 3 routing (I have never used them so I am not sure if they can).
HTH
Don't forget to mark a post resolved if your question was answered.
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04-03-2014 09:09 AM
04-03-2014 09:09 AM
Re: DHCP Problem with 2 V1910
I have the schemma as follows:
192.168.3.5 VLAN1 192.168.1.5 VLAN1
Internet --------- Firewall----------Switch 1 ------(Point to Point)---------- switch2 -----------firewall ---------Internet
DHCP Server VLAN10 VLAN10 DHCPServer2
192.168.3.1 192.168.100.1 192.168.100.2 192.168.1.1
on VLAN1 on VLAN1
I hope this is clear, but each switch has 2 VLAN's, VLAN 1 and 10, the VLAN 10 connects the PTP , but the problem is that I don't know how to block the DHCP requests on each side to avoid getting ip's from different segment.
Thx
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04-03-2014 09:12 AM
04-03-2014 09:12 AM
Re: DHCP Problem with 2 V1910
How can I block the port 67 on ACL?
Thx