Multicast - two identical 2810-48g's two speeds

[LukeB]

I have two 2810-48g's in the same rack uplinked to a 2910-48g

2910-48g(sw-02-01) port 48 fiber uplink to data center

2810-48g(sw-02-02) port 48 cat6 patch to sw-02-01 port 47

2010-48g(sw-02-03) port 48 cat6 patch to sw-02-01 port 46

all testing done with the same two dell m102z's and a single wds server

devices connected to sw-02-01 or sw-02-03 multicast at  12000KBps

but devices connected to sw-02-02 only reach 5500KBps

both sw-02-02 and sw-02-03 are running the same config file.

I've reset sw-02-02 to factory defults and reaplyied the config, this didn't make a diference.

i've swaped the uplinks and replaced the patch leads, also didn't help.

any thoughts?

thanks in advance.

[LukeB]

forgot to say I've attached a dump of the config for each of the switches. cheers....