05-15-2002 08:20 AM - edited 03-01-2019 09:44 PM
I need send UDP broadcast DHCP thru of three routers.
My quesstion is if I need add IP HELPER ADDRESS in all routers or only in router source.
05-15-2002 08:32 AM
You should not have to at apply to all three devices only the 1st router the DHCP packet will hit.. also remember to use the ip forward udp 68 and 67
05-15-2002 08:54 AM
Thank you...
05-16-2002 12:38 PM
Be sure to check out the following article on MS KB about all the UDP ports forwarded by IP HELPER ADDRESS.....it's not just DHCP. You need to block the other ones explicitly if you don't want them passing through as well.
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q190930
Also:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt1/1cfdhcp.htm
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