From: Jonathan V Hays (jhays@jtan.com)
Date: Sat Jun 21 2003 - 12:05:26 GMT-3
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> Behalf Of wing_lam@jossynergy.com
> Sent: Monday, June 23, 2003 5:23 AM
> To: ccielab@groupstudy.com
> Subject: helper address
>
>
> Hi, Group;
>
> I would like to test the "ip helper" address function. I
> generate a subnet
> broadcast in a interface and using helper address to redircet
> this subnet
> broadcast to another host, but no matter I do what debugging,
> I cannot see
> packet go to the host; anybody please suggest a testing
> method on whether
> the helper address config is success.
Please be more specific. Given the sketchy information you have provided
we would have to do a LOT of guessing to figure out what you are doing.
1. Post your config.
2. Describe the topology.
3. Describe exactly what you are doing to test. How are you generating
the broadcast? On what machine? Another router? What kind of broadcast
are you generating? What debug command are you using and where are you
using it?
Note that the "ip helper-address" forwards specific broadcasts for the
eight UDP destination ports below:
37 time server
49 TACACS
53 DNS
67 BOOTP/DHCP Server
68 BOOTP/DHCP Client
69 TFTP
137 NETBIOS Name Service
138 NETBIOS Datagram Service
So if you are testing the helper-address command you will have to
generate one of those types of broadcasts.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
fipras_r/1rfipadr.htm#1018608
HTH
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