[j-nsp] ethernet promisc mode

[Avram Dorfman]

Richard,

Getting the ethernet into promiscuous mode wouldn't solve your problem. 
If the packets it picks up don't have the RE as a destination IP 
address on them, they're just going to get forwarded according to the 
forwarding table anyway (presumable back out that interface, and get 
picked up again, causing a forwarding loop).

This is a dangerous idea anyway, because there is only a fast-e between 
the FE and the RE. It would be extremely easy to saturate it, and that 
can break things, and put a dangerous load on the CPU (I assume this is 
an active router).

-Avram

On Wednesday, October 8, 2003, at 11:30  AM, Richard A Steenbergen 
wrote:

> On Wed, Oct 08, 2003 at 08:56:12AM +0200, Josef Buchsteiner wrote:
>> Richard,
>>         the  only  item  which  comes  in  my  mind  is  if  you  
>> configure
>>         ethernet-ccc  encaps  which  needs  to  turn of the DA CAM 
>> filter..
>>         whether  this  helps  you is another question  since it 
>> effects arp
>>         resolution and your current traffic flow.
>
> Good idea, but its still doesn't help me pick anything up in a tcpdump 
> off
> the RE. I suppose I could setup a a CCC bridge to another port with a
> sniffer box, but it rather defeats the purpose in terms of convenience.
>
> -- 
> Richard A Steenbergen <ras at e-gerbil.net>       
> http://www.e-gerbil.net/ras
> GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 
> 2CBC)
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/juniper-nsp