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How to add a BootP Forward

Posted on 2008-10-14
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Last Modified: 2013-11-11
I am new to the Mac platform and I am having an issue with imaging and I am hoping that you can help. I am trying to NetBoot some Mac desktops which are located at location 1, but my Mac OS X Server is located in my server room which is not in the same location. I am able to connect to the Xserve via the desktops but I am unable to NetBoot to the Xserve. I am able to NetBoot with no problem if I am on the same subnet, but I cant NetBoot across subnets. How do I add a BootP Forward on a Cisco 6509 so that I am able to NetBoot across subnets?
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Question by:rw2and1
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DJDecay earned 500 total points
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On the interface to the other network, whether VLAN IP interface or a Physical Routed interface
you need to add an IP Helper, in order to forward bootp/dhcp packets between different subnets as both of these are "broadcast" based services and are isolated to the subnet they're running on.

First make sure that bootp/dhcp is configured for the "other subnet" then add
in the interface config mode.

in IOS

conf t

interface <Interface Name for the Subnet>
ip helper-address X.X.X.X


where X.X.X.X is the address of your bootp/dhcp server.

However you need to do this on the interface and on the device that routes traffic between vlans/subnets on your network and has an actual IP.

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