From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Jun 15 2006 - 17:50:52 ART
The problem you're seeing is most likely related to directed-broadcast
being disabled on the interface. Issue the "ip directed-broadcast"
interface level command on E0/0 and see if that has an effect. Also you
can change the destination to 255.255.255.255 in the RTR if you want an
all subnet broadcast. If you have IEWB-RS this is covered in the volume
1 solutions guide under how to verify that the ip multicast-helper map
is working.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Pierre-Alex
> Sent: Thursday, June 15, 2006 5:09 AM
> To: Koen Zeilstra
> Cc: ccielab@groupstudy.com
> Subject: Re: Generating UDP broadcast from router using RTR possible?
>
> Sorry the message went before it was ready ...
>
> Here it is complete:
>
> --------------
>
> Koen,
>
> Just so you know, I was not able to test multicast helper-map using
DNS
> broadcast as a source
> of broadcast traffic. Using a router running RIP in version 1 did
not
> cut
> it either.
>
> Router generating DNS / RIPv1
> (source)--F0/0--R2----multicast----r3-e0/0--R4(Receiver)
>
> I had to use a server with a traffic generator as below:
> Server(source)--F0/0--R2----multicast----r3-e0/0--R4(Receiver)
>
> My problem remains: on the exam I will not have a way to test that the
> multicast-helper map is working as expected .
>
> Pierre-Alex
>
>
>
> ----- Original Message -----
> From: "Pierre-Alex" <paguanel@hotmail.com>
> To: "Koen Zeilstra" <koen@koenzeilstra.com>
> Cc: <ccielab@groupstudy.com>
> Sent: Thursday, June 15, 2006 12:03 PM
> Subject: Re: Generating UDP broadcast from router using RTR possible?
>
>
> > Koen Just so you know, I was not able to test multicast helper-map
using
> > DNS broadcast as a source
> > of broadcast traffic. Using a router running RIP in version 1
> >
> >
> >
> > ----- Original Message -----
> > From: "Koen Zeilstra" <koen@koenzeilstra.com>
> > To: "Pierre-Alex" <paguanel@hotmail.com>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Thursday, June 15, 2006 10:31 AM
> > Subject: Re: Generating UDP broadcast from router using RTR
possible?
> >
> >
> >> Piere-Alex,
> >>
> >> With help of a blind dns lookup you are able to do at lease UDP
> broadcast
> >> to port 53.
> >>
> >> Router(conf)# ip domain.lookup
> >> Router# cisco.com
> >> Translating "cisco.com"...domain server (255.255.255.255)
> >>
> >>
> >> kind regards,
> >>
> >> Koen Zeilstra
> >>
> >> -----------------------
> >> Forgetfulness, n.:
> >> A gift of God bestowed upon debtors in compensation for their
> >> destitution of conscience.
> >>
> >> On Thu, 15 Jun 2006, Pierre-Alex wrote:
> >>
> >> | Is it possible to trick the router into sending UDP broadcasts
via
> rtr?
> >> |
> >> | I am getting "encapsulation failure" when running the following:
> >> |
> >> | rtr 2
> >> | type udpEcho dest-ipaddr 10.1.2.255 dest-port 65300
> >> | request-data-size 1500
> >> | timeout 50
> >> | frequency 1
> >> | rtr schedule 2 life forever start-time now
> >> |
> >> |
> >> | It will greatly help me in testing various things.
> >> |
> >> | Thanks
> >> |
> >> | Also, I have noticed that my destination port was not respected
(but
> >> this is a
> >> | minor thing).
> >> |
> >> |
> >> | *Mar 1 01:24:07.393: IP: s=10.1.2.1 (local), d=10.1.2.255
> >> (Ethernet0/0), len
> >> | 80, encapsulation
> >> | failed
> >> | *Mar 1 01:24:07.393: UDP src=50659, dst=1967
> >> | r1#
> >> |
> >> | Pierre-Alex
> >> |
> >> |
>
This archive was generated by hypermail 2.1.4 : Sat Jul 01 2006 - 07:57:32 ART