SF300 24P RSTP shuts port

[nahushraj]

even though a router connected to an access port on a SG300 switch the RSTP disables the port.How can i fix this?

[Mark Malone]

hey got to spanning-tree -STP interface settings and turn off spanning-tree for that interface the routers connected too

It shouldnt be disbaling the port is it a l3 switch or a full on router

[nahushraj]

hi mark,

i have another site with same model switch & config which works fine. Even though the router model is same. no matter how many times i do set interface active gi$$$ where $= interface number.

thanks.

[Mark Malone]

what have you got the port set as a trunk ? is there more than 1 link to between the switch and router if there both sg300s ?

if its working on another site and its same physical setup and config you may be having a firmwrae issue you could try upgrade or check with SMB is there a know issue on your current firmware with stp

http://www.cisco.com/c/en/us/support/web/tsd-cisco-small-business-support-center-contacts.html