From: Paul Cosgrove (paul.cosgrove@heanet.ie)
Date: Tue Feb 05 2008 - 19:05:25 ARST
Hi Marit,
I would interpret "disabling hellos packets out" as preventing their
being sent under any circumstances. If you configure the interface as
non-broadcast you MAY stop sending hello packets, which is not always
the same thing.
Even without a neighbor statement configured your router can send hello
messages in response to received hellos. Incidently the other neighbor
does not have to be using the non-broadcast network type with you as a
configured neighbor, other modes also trigger your router to respond
just as long as the hello and dead intervals (etc.) match.
If you combine non-broadcast mode with Marc's suggestion of an ACL on
the interface, you can block incoming ospf (hellos) and thereby prevent
your router sending them out. Outgoing ACL won't stop the locally
generated traffic.
Paul.
Marc La Porte wrote:
> Hi Marit,
>
> I would use an ACL instead to filter out hello packets, or (if allowed) use
> the passive-interface.
> To me changing the network type is not a clean and nice solution (although
> it works and can be used if you are restricted)
>
> HTH,
> Marc
>
> On Feb 5, 2008 5:20 AM, <maritpra@hotmail.com> wrote:
>
>> Hello,
>>
>> To disable OSPF hello out of Ethernet Interface, can we do like this?
>>
>> 1) Use "passive interface e0/0"
>>
>> or
>>
>> 2) Use "ip ospf network non-broadcast" under e0/0 interface
>>
>> Which one is correct or both?
>>
>> - From my testing, I did both then debug and found out that both disable
>> hello packets, so i would like to know your guy oppinoin becasue some WB
>> refered to only 1) as correct answer.
>>
>> Regard,
>> Marit
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
-- Paul Cosgrove HEAnet Limited, Ireland's Education and Research Network 1st Floor, 5 George's Dock, IFSC, Dublin 1 Registered in Ireland, no 275301 tel: +353-1-660 9040 fax: +353-1-660 3666 web: http://www.heanet.ie/
This archive was generated by hypermail 2.1.4 : Sat Mar 01 2008 - 16:54:47 ARST