From: John Matus (john_matus@hotmail.com)
Date: Thu May 05 2005 - 21:32:42 GMT-3
hmmm........not sure i understand the difference between routing and
forwarding....perhaps forwarding does not use the routing table for it's
decistion......<i dunno!!!> maybe they should change the test to the R & S
& F exam.
>From: "Brian Dennis" <bdennis@internetworkexpert.com>
>To: "John Matus" <john_matus@hotmail.com>,<ccielab@groupstudy.com>
>Subject: RE: ip helper-address command
>Date: Thu, 5 May 2005 20:12:20 -0400
>
>John,
> The helper command is telling the router where to FORWARD the
>packets not ROUTE the packets. Routing and forwarding are two totally
>different things.
>
>Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
>
>bdennis@internetworkexpert.com
>Internetwork Expert, Inc.
>http://www.InternetworkExpert.com
>Toll Free: 877-224-8987
>Direct: 775-745-6404 (Outside the US and Canada)
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>John Matus
>Sent: Thursday, May 05, 2005 4:45 PM
>To: Brian Dennis; ccielab@groupstudy.com
>Subject: RE: ip helper-address command
>
>hmmm......how and why would a router forward udp ports for netbios if
>netbios is a non-routable protocol??
>
> >From: "Brian Dennis" <bdennis@internetworkexpert.com>
> >To: "John Matus" <john_matus@hotmail.com>,<ccielab@groupstudy.com>
> >Subject: RE: ip helper-address command
> >Date: Thu, 5 May 2005 19:38:28 -0400
> >
> >Key is to just know what you are trying to forward. The router will
> >forward these UDP ports by default:
> >
> >37 Time Protocol
> >49 TACACS
> >53 DNS
> >68 BootP Server
> >69 TFTP
> >137 NetBios
> >138 NetBios Datagram
> >
> >If you want to forward any other UDP ports, you should specify them
>with
> >the "ip forward-protocol udp <port number>" command. If you do not
>want
> >the router to forward any of the default ports, use the "no ip
> >forward-protocol udp <port number>" command.
> >
> >Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> >
> >bdennis@internetworkexpert.com
> >Internetwork Expert, Inc.
> >http://www.InternetworkExpert.com
> >Toll Free: 877-224-8987
> >Direct: 775-745-6404 (Outside the US and Canada)
> >
> >-----Original Message-----
> >From: John Matus [mailto:john_matus@hotmail.com]
> >Sent: Thursday, May 05, 2005 4:15 PM
> >To: Brian Dennis; ccielab@groupstudy.com
> >Subject: RE: ip helper-address command
> >
> >yes, that is an ugly document indeed. so it looks like the answer is
> >"no"
> >unless you're running lots of routers that are processing multiple
> >duplicate
> >broadcast request.
> >
> > >From: "Brian Dennis" <bdennis@internetworkexpert.com>
> > >To: "John Matus" <john_matus@hotmail.com>,<ccielab@groupstudy.com>
> > >Subject: RE: ip helper-address command
> > >Date: Thu, 5 May 2005 18:50:44 -0400
> > >
> > >Everything you ever wanted to know about the "ip helper-address" and
> >"ip
> > >forward-protocol udp" commands but were afraid to ask:
> > >
> > >http://www.cisco.com/univercd/cc/td/doc/cisintwk/idg4/nd2019.htm
> > >
> > >Direct from the DocCD ;-)
> > >
> > >Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> > >
> > >bdennis@internetworkexpert.com
> > >Internetwork Expert, Inc.
> > >http://www.InternetworkExpert.com
> > >Toll Free: 877-224-8987
> > >Direct: 775-745-6404 (Outside the US and Canada)
> > >
> > >-----Original Message-----
> > >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
>Of
> > >John Matus
> > >Sent: Thursday, May 05, 2005 2:54 PM
> > >To: ccielab@groupstudy.com
> > >Subject: ip helper-address command
> > >
> > >does the "ip helper-address" command need the "ip forward-protocol
>udp"
> > >command in order to work correctly?
> > >
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