4500G problem ring topology.

[Alejandro Revert]

Sorry my english is very poor.

I have a problem with CX4 modules, in ring topology

I have in my enterprise six switches 4500g, with the next topology:

SWITCH A (1 module with two ports 10G CX4 an 1 module 10G XFP)


SWITCH B (1 module with two ports 10G CX4 an 1 module 10G XFP)


SWITCH C (1 module with two ports 10G CX4)


SWITCH D (1 module with two ports 10G CX4)

SWITCH E (1 module with two ports 10G CX4 an 1 module 10G XFP)


SWITCH F (1 module with two ports 10G CX4 an 1 module 10G XFP)

I want join switch A, B, C, D in topology ring with CX4 ports (A->B->C->D-A)


The switch A is conected with SWITCH E with 10G XFP module.


The switch B is conected with SWITCH F witch 10G XFP module, and E an F with CX4 module.

I can not close de ring A-B-C-D-A, disconecting CX4 cable between switches B-C all is correctly,


but when i connected this cable, i lose packets with my servers and the network is very slow.

I have activated MSTP, and the switches are not in stack mode are all standalone.

It's posible this topology with MSTP o is necesary other tecnology how RRPP.

Thanks

Toni Rueda

[Alejandro Revert]

I have configurated the ring with RRPP and the problem not is resolved.

I think that the problem is in cx4 modules, not is a problem mstp or rrpp.

¿It's possible a bug in firmware?

I am very lost.

Thanks