I just found out that the SRW2048 uses wrong costs for port-channels.
g47 enabled 128.47 20000 FRW Root No P2p (RSTP) ch1 enabled 128.53 20000 BLK Altn No P2p (RSTP)
ch1 consists of two interfaces and should have 10.000 as cost.
ch1 is connected to a Cisco 3560-E and on this side everything works fine:
Port 104 (Port-channel7) of MST0 is designated forwarding Port path cost 10000, Port priority 128, Port Identifier 128.104.
Port-channel7 is up, line protocol is up (connected) Hardware is EtherChannel, address is X.Y.Z (bia X.Y.Z) MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 1000Mb/s, link type is auto, media type is unknown input flow-control is off, output flow-control is unsupported Members in this channel: Gi0/13 Gi0/14
Why doesn't take the SRW2048 the interface speed of port-channels in account? This makes a redundant backup link with spanning-tree a nightmare because you have to set the costs manually.
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