1. 포트 상태
2. Gbic 인식 상태
3. 포트 트래픽
4. 시스템 로그
5. 인터페이스 CRC
6. Looping 상태
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E4020-24T#show interface description
Fri Jun 25 2021 13:50:47 KST
Interface Status Protocol description
Giga0/1 up up
Giga0/2 up up
Giga0/3 up up
Giga0/4 up up
Giga0/5 down down
Giga0/6 up up
Giga0/7 up up
Giga0/8 up up
Giga0/9 down down
Giga0/10 down down
Giga0/11 down down
Giga0/12 up up
Giga0/13 down down
Giga0/14 up up
Giga0/15 down down
Giga0/16 up up
Giga0/17 down down
Giga0/18 up up
Giga0/19 up up
Giga0/20 down down
Giga0/21 down down
Giga0/22 up up
Giga0/23 down down
Giga0/24 up up
Giga0/25 down down
Giga0/26 down down
Giga0/27 down down
Giga0/28 down down
Vlan1 up up
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E4020-24T#show interface status
Fri Jun 25 2021 13:51:06 KST
Port Name Status Vlan Duplex Speed Type
-------- ------------------ ------------ ---------- ------- ------- ----------------
Gi0/1 connected 1 full a-1000 10/100/1000BaseT
Gi0/2 connected 1 full a-1000 10/100/1000BaseT
Gi0/3 connected 1 full a-100 10/100/1000BaseT
Gi0/4 connected 1 full a-1000 10/100/1000BaseT
Gi0/5 notconnect 1 full auto 10/100/1000BaseT
Gi0/6 connected 1 full a-1000 10/100/1000BaseT
Gi0/7 connected 1 full a-100 10/100/1000BaseT
Gi0/8 connected 1 full a-1000 10/100/1000BaseT
Gi0/9 notconnect 1 full auto 10/100/1000BaseT
Gi0/10 notconnect 1 full auto 10/100/1000BaseT
Gi0/11 notconnect 1 full auto 10/100/1000BaseT
Gi0/12 connected 1 full a-1000 10/100/1000BaseT
Gi0/13 notconnect 1 full auto 10/100/1000BaseT
Gi0/14 connected 1 full a-1000 10/100/1000BaseT
Gi0/15 notconnect 1 full auto 10/100/1000BaseT
Gi0/16 connected 1 full a-1000 10/100/1000BaseT
Gi0/17 notconnect 1 full auto 10/100/1000BaseT
Gi0/18 connected 1 full a-1000 10/100/1000BaseT
Gi0/19 connected 1 full a-1000 10/100/1000BaseT
Gi0/20 notconnect 1 full auto 10/100/1000BaseT
Gi0/21 notconnect 1 full auto 10/100/1000BaseT
Gi0/22 connected 1 full a-1000 10/100/1000BaseT
Gi0/23 notconnect 1 full auto 10/100/1000BaseT
Gi0/24 connected 1 full a-1000 10/100/1000BaseT
Gi0/25 notconnect 1 full auto Not Present
Gi0/26 notconnect 1 full auto Not Present
Gi0/27 notconnect 1 full auto Not Present
Gi0/28 notconnect 1 full auto Not Present
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E4020-24T#show interface transceiver
Wed Jul 07 2021 23:44:02 KST
If device is externally calibrated, only calibrated values are printed.
++ : high alarm, + : high warning, - : low warning, -- : low alarm.
NA or N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).
Optical Optical
Temperature Voltage Current Tx Power Rx Power
Port (Celsius) (Volts) (mA) (dBm) (dBm)
------- ----------- ------- -------- -------- --------
E4020-24T#show port statistics all
Fri Jun 25 2021 13:52:11 KST
============================================================================
Port TX| RX
bits/s pkts/s| bits/s pkts/s
-------------------------------------------------------------------------------
Gi0/1 ---------------------------------------------------------------------
5 sec. 58,024 76 969,384 156
1 min. 290,024 101 1,117,592 179
5 min. 308,336 103 1,108,712 178
Gi0/2 ---------------------------------------------------------------------
5 sec. 379,248 235 5,231,408 798
1 min. 373,128 237 4,920,560 751
5 min. 373,984 234 4,889,160 746
......
Gi0/24 ---------------------------------------------------------------------
5 sec. 10,637,888 1,338 684,200 376
1 min. 6,773,704 1,043 1,892,032 460
5 min. 6,166,128 958 968,424 364
E4020-24T#
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E4020-24T#show logging back
Fri Jun 25 2021 13:53:00 KST
Syslog logging: enabled
Console logging: disabled
Monitor logging: level informational
Buffer logging: level informational
Trap logging: level informational
Flash logging: level informational
Log Buffer (65536 bytes):
Jun 25 12:37:17.791 [5] %LINEPROTO-5-UPDOWN: Line protocol on Interface Giga0/6, changed state to up
Jun 25 12:37:17.772 [3] %LINK-3-UPDOWN: Interface Giga0/6, changed state to up
Jun 25 10:18:14.273 [5] %LINEPROTO-5-UPDOWN: Line protocol on Interface Giga0/7, changed state to up
Jun 25 10:18:14.260 [3] %LINK-3-UPDOWN: Interface Giga0/7, changed state to up
Jun 25 10:18:09.268 [5] %LINEPROTO-5-UPDOWN: Line protocol on Interface Giga0/5, changed state to down
Jun 25 10:18:09.254 [3] %LINK-3-UPDOWN: Interface Giga0/5, changed state to down
Jun 25 10:17:24.219 [5] %LINEPROTO-5-UPDOWN: Line protocol on Interface Giga0/5, changed state to up
Jun 25 10:17:24.200 [3] %LINK-3-UPDOWN: Interface Giga0/5, changed state to up
Jun 25 10:17:18.685 [5] %LINEPROTO-5-UPDOWN: Line protocol on Interface Giga0/5, changed state to down
Jun 25 10:17:18.667 [3] %LINK-3-UPDOWN: Interface Giga0/5, changed state to down
Jun 25 10:16:00.900 [5] %LINEPROTO-5-UPDOWN: Line protocol on Interface Giga0/5, changed state to up
Jun 25 10:16:00.884 [3] %LINK-3-UPDOWN: Interface Giga0/5, changed state to up
Jun 25 09:47:00.400 [5] %LINEPROTO-5-UPDOWN: Line protocol on Interface Giga0/7, changed state to down
------------------------------------------------------------------------------
E4020-24T#show interface GigabitEthernet 0/24
Fri Jun 25 2021 13:55:31 KST
Giga0/24 is up, line protocol is up (connected)
Hardware is Ethernet Current HW addr: 7030.5d81.7e43
Physical:7030.5d81.7e43 Logical:(not set)
index 124 metric 1 mtu 1500 arp ageing timeout 7200
Full-duplex, A-1000Mb/s, media type is 10/100/1000BaseT
<UP,BROADCAST,RUNNING,MULTICAST>
Bandwidth 1g
VRRP Master of : VRRP is not configured on this interface.
Last clearing of "show interface" counters never
60 seconds input rate 714,304 bits/sec, 336 packets/sec
60 seconds output rate 6,056,008 bits/sec, 942 packets/sec
L2/L3 in Switched: ucast 252,149,984 pkt - mcast 191,441 pkt
L2/L3 out Switched: ucast 196,518,363 pkt - mcast 439,719 pkt
258,891,486 packets input, 316,011,785,848 bytes
Received 6,550,061 broadcast pkt (191,441 multicast pkt)
0 CRC, 0 oversized, 1 dropped
197,041,460 packets output, 173,091,898,874 bytes
0 collisions
0 late collisions, 0 deferred
------------------------------------------------------------------------------
E4020-24T#show sld
Fri Jun 25 2021 13:56:03 KST
Interface Enable Flag Sts Link Recovery Count Last change
Gi0/1 yes .L ok up 0 0 04d01h09m
Gi0/2 yes .L ok up 0 0 04d01h09m
Gi0/3 yes .L ok up 0 0 04d01h09m
Gi0/4 yes .L ok up 0 0 04d01h09m
Gi0/5 yes .L ok down 0 0 04d01h09m
Gi0/6 yes .L ok up 0 0 04d01h09m
Gi0/7 yes .L ok up 0 0 04d01h09m
Gi0/8 yes .L ok up 0 0 04d01h09m
Gi0/9 yes .L ok down 0 0 04d01h09m
Gi0/10 yes .L ok down 0 0 04d01h09m
Gi0/11 yes .L ok down 0 0 04d01h09m
Gi0/12 yes .L ok up 0 0 04d01h09m
Gi0/13 yes .L ok down 0 0 04d01h09m
Gi0/14 yes .L ok up 0 0 04d01h09m
Gi0/15 yes .L ok down 0 0 04d01h09m
Gi0/16 yes .L ok up 0 0 04d01h09m
Gi0/17 yes .L ok down 0 0 04d01h09m
Gi0/18 yes .L ok up 0 0 04d01h09m
Gi0/19 yes .L ok up 0 0 04d01h09m
Gi0/20 yes .L ok down 0 0 04d01h09m
Gi0/21 yes .L ok down 0 0 04d01h09m
Gi0/22 yes .L ok up 0 0 04d01h09m
Gi0/23 yes .L ok down 0 0 04d01h09m
Gi0/24 no .L n/a up inactive 0 n/a
Gi0/25 no .L n/a down inactive 0 n/a
Gi0/26 no .L n/a down inactive 0 n/a
Gi0/27 no .L n/a down inactive 0 n/a
Gi0/28 no .L n/a down inactive 0 n/a
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