Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 655)

Multi-Service IronWare Switching Configuration Guide 625
53-1003036-02
About Multi-Chassis Trunk (MCT)
18
Port loop detection
Port loop detection is used to detect L2 loops in MCT ( due to misconfiguration). When using MCT, it
requires the ICL ports to be strictly tagged. The port loop detection feature supports strictly tagged
ports.
Loop detection for specific VLAN on a port
Strict mode loop detection can be configured on a specific VLAN for a given port. To configure loop
detection on VLAN 10 for interface 1/1, enter a command such as the following.
Brocade(config-if-e1000-1/1)#loop-detection vlan 10
Syntax: [no] loop-detection [vlan ]
Where vlan-id enablesLoose Mode configuration for a VLAN group.
A port can be tagged or untagged member of this VLAN.
Multiple VLANs can have loop detection configured for a given port. Loop detection BPDUs will be
sent out of each configured VLAN on that port.
Loop detection shutdown-disable
Use the loop-detection shutdown-disable command to disable the port shutdown feature in case of
loop detection. This feature will ensure that the ICL stays up when a loop detection PDU is received
on the ICL. This command will be applied to both strict mode or loose mode loop detection. To
configure loop-detection shutdown-disable to shutdown port 1/1 used for the ICL link, enter a
command such as the following.
Brocade(config-if-e1000-1/1)#loop-detection shutdown-disable
Syntax: loop-detection shutdown-disable
Loop-detection shutdown-sending-port
By default, the receive-port is shutdown by loop detection. The loop-detection
shutdown-sending-port command will shutdown the port that sent the loop detection PDUs instead
of shutting down the receiving port. This will ensure that the ICL stays up when a loop detection
PDU is received on the ICL.
This feature is only applicable to strict mode loop detection.
Brocade(config-if-e1000-1/1)#loop-detection shutdown-sending-port
SuperSpan 03-80-c2-xx-xx-00 Flood to the VLAN Same as non-MCT switch
VSRP Control
03-04-80-00-01-00
Flood to the VLAN Same as non-MCT switch
VSRP Source
03-04-80-00-01-01
Flood to the VLAN Same as non-MCT switch
Loop detection MAC
Base MAC address |
0x03000000
Flood to the VLAN Same as non-MCT switch
TABLE 81 L2 protocol forwarding action –MCT switch and non - MCT switch
Protocol Destination MAC Non- MCT switch
forwarding action MCT switch forwarding action