I work for medium sized ISP in Poland. Among other services we are providing IPTV over multicast.
Few of our client are connected using fiber optics (uplink on SFP port) and RB260GS (older version, NOT CSS106-5G-1S) as access device.
Firmware is latest for this version of hardware, i.e. SwOS 1.17 and everything is working great.
On some devices there is even older firmware (1.13). We didn't upgraded it because there was no problems at all.
Last batch that came from our supplier was CSS106-5G-1S and then problems with multicast IPTV started.
Customers reports problems with TV, e.g. screen freezes, sound glitches.
Our multicast testing probe connected to CSS106-5G-1S in fact shows multiple lost and out of order packets.
We tried changing settings like turning IGMP on and off, but nothing helped.
We tested firmwares from 2.4 to newest 2.10, then ruled out other network problems -
when we replaced CSS106-5G-1S with other managed switch (d-link,3com) multicast probe shows no problems at all.
anyone got any ideas what might be cause of problem?