Specifications

112 Implementing IBM System Networking 10Gb Ethernet Switches
Spanning Tree Protocol
The STP mode that we use in our topology is Per-VLAN Rapid Spanning Tree Protocol
(PVRSTP) with the bridge priorities shown in Table 3-4.
Table 3-4 Spanning Tree Protocol bridge priorities
For other VLANs, the priorities are left at the default values, leaving the root bridge selection
process to rely on the MAC addresses of the switches.
Ports 7 on access switches (ACC-1 and ACC-2) are configured as Fast Forward ports.
To prevent unwanted topology changes, caused by plugging another switch into the topology,
configure BPDUGuard on all ports on ACC-1 and ACC-2 switches other than the ports used
in the topology.
VLAN101 ACC-1 - AGG-1 ACC-1 AGG1
p2p network
ACC-1, port1 (untagged)
ACC-1, port2 (untagged)
AGG-1, port17 (untagged)
AGG-1, port18 (untagged)
VLAN102 ACC-1 - AGG-2 ACC-1 - AGG-2
p2p network
ACC-1, port3 (untagged)
ACC-1, port4 (untagged)
AGG-2, port19 (untagged)
AGG-2, port20 (untagged)
VLAN103 ACC-2 - AGG-1 ACC-2 - AGG-1
p2p network
ACC-2, port3 (untagged)
ACC-2, port4 (untagged)
AGG-1, port19 (untagged)
AGG-1, port20 (untagged)
VLAN104 ACC-2 - AGG-2 ACC-2 - AGG-2
p2p network
ACC-2, port1 (untagged)
ACC-2, port2 (untagged)
AGG-2, port17 (untagged)
AGG-2, port18 (untagged)
VLAN100 AGG-1 - AGG-2 AGG-1 AGG-2
p2p network
AGG-1, port1 (tagged)
AGG-1, port5 (tagged)
AGG-2, port1 (tagged)
AGG-2, port5 (tagged)
VLAN Priority on
ACC-1
Priority on
ACC-2
Priority on
AGG-1
Priority on
AGG-1
10 0 4096 There is no
VLAN10 on the
switch.
There is no
VLAN10 on the
switch.
VLAN number VLAN name Description Member ports