[outages] AT&T <-> Level3 Packet Loss in SF Bay Area

[virendra rode]

Hi -

On 03/09/2011 11:21 AM, Jonathan Lassoff wrote:
> We've been observing a small about of intermittent packet loss to/from
> AT&T and Level3 here in the San Francisco Bay Area this morning. In
> examining the situation, it seems like a evenly-spaced dropping of
> packets to certain IPs.
-------------------
We experienced similar issue last week off our level3 connection for a 
specific /21 customer block. After further troubleshooting we decided to 
re-route our /21 to the other provider where packet loss issue went 
away. We are still scratching our heads over this issue.


regards,
/virendra

>
> This appears to end users like some IPs on destination networks are
> reachable, while some adjacent ones are not.
>
> I suspect this is due to a failed LAG leg or ECMP leg on Level3's side.
>
>
> We were able to route around the problem for now.
>
> Cheers,
> jof
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