From: Alec (clapun@graduate.hku.hk)
Date: Sun Dec 14 2003 - 21:46:27 GMT-3
does that it mean if the destination port is TFTP, Domain Name System (DNS),
Time, NetBIOS, ND, BOOTP or DHCP packet, then no ip forward-protocol command
is needed ?
rgds,
alec
----- Original Message -----
From: "Ozgur Guler (Garanti Teknoloji)" <OzgurG@garanti.com.tr>
To: "Pun, Alec CL" <Alec.CL.Pun@pccw.com>; "ccielab"
<ccielab@groupstudy.com>
Sent: Monday, December 15, 2003 12:20 AM
Subject: RE: ip helper-address
> CCO
> -----
>
> All of the following conditions must be met in order for a UDP or IP
packet to be helpered by the ip helper-address command:
>
> The MAC address of the received frame must be all-ones broadcast address
(ffff.ffff.ffff).
> The IP destination address must be one of the following: all-ones
broadcast (255.255.255.255), subnet broadcast for the receiving interface;
or major-net broadcast for the receiving interface if the no ip classless
command is also configured.
> The IP time-to-live (TTL) value must be at least 2.
> The IP protocol must be UDP (17).
> The UDP destination port must be for TFTP, Domain Name System (DNS), Time,
NetBIOS, ND, BOOTP or DHCP packet, or a UDP port specified by the ip
forward-protocol udp global configuration command.
>
>
> Ozgur
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Pun, Alec CL
> Sent: Sunday, December 14, 2003 6:02 PM
> To: ccielab
> Subject: ip helper-address
>
>
> When I use ip helper-address to handle, say DHCP request where the server
is
> located on another subnet, do I need to use ip forward-protocol udp as
well
> ? If not, when to use this command ?
>
> tks
> alec
>
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