Differences

This shows you the differences between two versions of the page.

--- cisco_sfp_and_port_commands [2021/04/17 17:13] – walkeradmin
+++ cisco_sfp_and_port_commands [2021/04/17 17:30] (current) – walkeradmin
@@ Line 256: / Line 256: @@
     ecb1.d74a.441d    DYNAMIC     Gi1/0/1
 Total Mac Addresses for this criterion: 19
+</file>
+\\
+----
+\\
+==== interface down/up ====
+\\
+To set a Cisco interface down or up we use the 'shutdown' command. 'shutdown' takes down the interface, 'no shutdown' brings it back up.
+\\
+\\
+To bring down or up and interface, you must first select the interface, then issue the shutdown command.
+\\
+<file>
+interface gigabitEthernet 1/0/48
+shutdown
+LINK-5-CHANGED: Interface GigabitEthernet1/0/48, changed state to administratively down
+exit
+Switch#show interfaces gigabitEthernet 1/0/48
+GigabitEthernet1/0/48 is administratively down, line protocol is down (disabled)
+  Hardware is Gigabit Ethernet, address is d0ec.3549.1530 (bia d0ec.3549.1530)
+  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
+     reliability 255/255, txload 1/255, rxload 1/255
+  Encapsulation ARPA, loopback not set
+  Keepalive set (10 sec)
+  Auto-duplex, Auto-speed, media type is 10/100/1000BaseTX
+  input flow-control is on, output flow-control is unsupported
+  ARP type: ARPA, ARP Timeout 04:00:00
+  Last input never, output never, output hang never
+  Last clearing of "show interface" counters never
+  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
+  Queueing strategy: fifo
+  Output queue: 0/40 (size/max)
+minute input rate 0 bits/sec, 0 packets/sec
+minute output rate 0 bits/sec, 0 packets/sec
+packets input, 0 bytes, 0 no buffer
+     Received 0 broadcasts (0 multicasts)
+runts, 0 giants, 0 throttles
+input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
+watchdog, 0 multicast, 0 pause input
+input packets with dribble condition detected
+packets output, 0 bytes, 0 underruns
+output errors, 0 collisions, 1 interface resets
+unknown protocol drops
+babbles, 0 late collision, 0 deferred
+lost carrier, 0 no carrier, 0 pause output
+output buffer failures, 0 output buffers swapped out
 </file>
+\\
+In the above example, we shutdown interface 48 on a Cisco, we then exit back up so we can run the 'show' command to check the status of the interface. Below we will bring the interface back up.
+\\
+<file>
+interface gigabitEthernet 1/0/48
+no shutdown
+exit
+Interface GigabitEthernet1/0/48, changed state to down
+exit
+show interfaces gigabitEthernet 1/0/48
+GigabitEthernet1/0/48 is down, line protocol is down (notconnect)
+  Hardware is Gigabit Ethernet, address is d0ec.3549.1530 (bia d0ec.3549.1530)
+  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
+     reliability 255/255, txload 1/255, rxload 1/255
+  Encapsulation ARPA, loopback not set
+  Keepalive set (10 sec)
+  Auto-duplex, Auto-speed, media type is 10/100/1000BaseTX
+  input flow-control is on, output flow-control is unsupported
+  ARP type: ARPA, ARP Timeout 04:00:00
+  Last input never, output never, output hang never
+  Last clearing of "show interface" counters never
+  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
+  Queueing strategy: fifo
+  Output queue: 0/40 (size/max)
+minute input rate 0 bits/sec, 0 packets/sec
+minute output rate 0 bits/sec, 0 packets/sec
+packets input, 0 bytes, 0 no buffer
+     Received 0 broadcasts (0 multicasts)
+runts, 0 giants, 0 throttles
+input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
+watchdog, 0 multicast, 0 pause input
+input packets with dribble condition detected
+packets output, 0 bytes, 0 underruns
+output errors, 0 collisions, 2 interface resets
+unknown protocol drops
+babbles, 0 late collision, 0 deferred
+lost carrier, 0 no carrier, 0 pause output
+output buffer failures, 0 output buffers swapped out
+</file>
+\\
+Notice that the message says 'interface is down' this just means nothing is plugged in, in the first example where we actually shutdown the interface it states that the interface is 'administratively down'
+\\
+----