[c-nsp] arps and "it's our address" ?

[Lincoln Dale]

Tuc at T-B-O-H.NET wrote:
> Hi,
>
> 	Posting this on behalf of someone else. 
>
> 	About 2 nites ago, around midnight, his network seemed like it imploded.
> Its a WISP, and connected to GigabitEthernet0/1 is his "Site A" that is 
> 192.168.25.1/24 . About 60% of the devices off the AP aren't contactable anymore.
> He has GigabitEthernet1/1 that he hangs 192.168.50.1/24 (Site B) and 
> 192.168.75.1/24 (Site C). Site B seemed to get a ripple effect for a few minutes,
> but recovered. Site C didn't get touched at all.
>
> 	Later that night, one of this backhauls still was able to pass data, but
> you couldn't contact the device management for 4 hours.
>
> 	He did a bunch of re-terminating, re-cabling, replacing equipment and
> it seems to still be plaguing him. He's also said he'll plug something in, be
> able to contact it for 2 minutes, then it disappears.
>   
sounds like you created a loop.

ensure STP is enabled and ensure the right ports are set to 'portfast'.



cheers,

lineoln.