I noticed in CSS11500 documentation Cisco advice not using level 2 devices for Inter-Switch Communication (see at link at the end). After sniffing, it appears ISC works with broadcasted ethernet frames.
So how should we proceed to link two redundant content switch distant from several kilometers ?
My problem is, in spite of cisco recommandations, I've linked CSS through two C65xx. Link works but become down for a very short time periodically (each 10 minutes).
This seems to have no incidence on reliability...