MROTEK PINE-16M, Руководство по настройке

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4.9 Configuration of Central Site Switching of PINE-16M
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Mro-tek(config)#
Example 2: delete all ports in trunk group 1 of PINE-16M
Mro-tek# config terminal
Configuration mode, one command input per time. End with CTRL-Z.
Mro-tek(config)# no trunk group 1
Set Successfully.
Mro-tek(config)# show trunk group
trunk disabled
all trunk groups have no port.
Mro-tek(config)#
4.9.8 Loop detection
The loop detection function eliminates the loops that affects the network performance and improves the
device’s ability of fault detection, tolerance and its robustness.
Figure 1: Loop Detection
The loop detection process is as follows:
•
Every port on the switch sends Loopback-detection packet periodically (The sending interval
can be set up by user. Typical interval is 4s.
•
The switch checks the CPU MAC field of the received packets. If the MAC address in the
CPU MAC field is the MAC address of the same switch, then a loop is concluded to occur on
some port of the switch. If the MAC address in the CPU MAC field is not the MAC address of
the same switch, the switch discards the packet.
•
If the port number of the received packet is same as that of the sent packet, then the loop is a
self loop; otherwise, the loop is an external loop (between the E1/Eth ports of the same PINE-
16M).
Enabling and disabling the loop detection function
The loop detection function is disabled by default. To carry out loop detection, the loop detection function
must be enabled and the switch port list for loop detection must be specified. The current loop detection
information is displayed in several lists. Each list corresponds to a port. For a port that is closed because of
loop, the corresponding bit is 1 and the bit corresponding to the port in the same loop is also 1. The bits for
all ports without loops are 0.
PINE -16M
P1 P2 P3
Self
External
Loop