Dell FCX624-E Laptop User Manual


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388 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Protected link groups
11
The show interface ethernet command also displays the UDLD state for an individual port. In
addition, the line protocol state listed in the first line will say “down” if UDLD has brought the port
down. An example is given below.
In this example, the port has been brought down by UDLD. Notice that in addition to the
information in the first line, the port state on the fourth line of the display is listed as DISABLED.
Clearing UDLD statistics
To clear UDLD statistics, enter the following command.
PowerConnect#clear link-keepalive statistics
Syntax: clear link-keepalive statistics
This command clears the Packets sent, Packets received, and Transitions counters in the show link
keepalive ethernet [<slotnum>/]<portnum> display.
Protected link groups
A protected link group minimizes disruption to the network by protecting critical links from loss of
data and power. In a protected link group, one port in the group acts as the primary or active link,
and the other ports act as secondary or standby links. The active link carries the traffic. If the
active link goes down, one of the standby links takes over.
During normal operation, the active port in a protected link group is enabled and the standby ports
are logically disabled. If the active port fails, the Dell PowerConnect device immediately enables
one of the standby ports, and switches traffic to the standby port. The standby port becomes the
new, active port.
PowerConnect#show interface ethernet 1/1
FastEthernet1/1 is down, line protocol is down, link keepalive is enabled
Hardware is FastEthernet, address is 00e0.52a9.bbca (bia 00e0.52a9.bbca)
Configured speed auto, actual unknown, configured duplex fdx, actual unknown
Member of L2 VLAN ID 1, port is untagged, port state is DISABLED
STP configured to ON, priority is level0, flow control enabled
mirror disabled, monitor disabled
Not member of any active trunks
Not member of any configured trunks
No port name
300 second input rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
300 second output rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 multicasts, 0 unicasts
0 input errors, 0 CRC, 0 frame, 0 ignored
0 runts, 0 giants, DMA received 0 packets
19 packets output, 1216 bytes, 0 underruns
Transmitted 0 broadcasts, 19 multicasts, 0 unicasts
0 output errors, 0 collisions, DMA transmitted 19 packets