Brocade 6910 Ethernet Access Switch Diagnostic Guide (Supporting R2.2.0.0) - Manual (Page 74)

64 Brocade 6910 Ethernet Access Switch Diagnostic Guide
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DRAFT: BROCADE CONFIDENTIAL
Port loop detection
• When a client has been denied access to the network, the 802.1x MAC session is aged out if
no traffic is received from the client’s MAC address over a fixed hardware aging period (300
seconds). You can optionally change the software aging period for 802.1x MAC sessions or
disable aging altogether. After the denied client’s 802.1x MAC session is aged out, traffic from
that client is no longer blocked, and the client can be re-authenticated.
• To implement 802.1x port security, at least one of the RADIUS servers identified to the Brocade
device must support the 802.1x standard.
Port loop detection
Brocade port loop detection allows the Brocade device to detect loops and disable a port that is on
the receiving end of a loop. A loop is detected by sending test packet BPDUs.
Port loop detection show commands
show spanning-tree
Syntax: show spanning-tree [interface]
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-12)
port-channel channel-id (Range: 1-12)
This command displays the loop detection configuration, as shown in the following example.
Console# show spanning-tree ethernet 1/1
Eth 1/ 1 Information
--------------------------------------------------------------
Admin Status : Enabled
Role : Root
State : Forwarding
Admin Path Cost : 0
Oper Path Cost : 100000
Priority : 128
Designated Cost : 0
Designated Port : 128.16
Designated Root : 32768.0001ECF8D8C6
Designated Bridge : 32768.0001ECF8D8C6
Forward Transitions : 1
Admin Edge Port : Auto
Oper Edge Port : Disabled
Admin Link Type : Auto
Oper Link Type : Point-to-point
Flooding Behavior : Enabled
Spanning-Tree Status : Enabled
Loopback Detection Status : Enabled
Loopback Detection Release Mode : Auto
Loopback Detection Trap : Disabled
Loopback Detection Action : Block
Root Guard Status : Disabled