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--- networking:cisco-2960-x [10/07/2026 08:49] – andrew
+++ networking:cisco-2960-x [10/07/2026 10:10] (current) – [Cisco 2960X series Gigabit ethernet switches] andrew
@@ Line 2: / Line 2: @@
 {{:networking:cisco2960-x.jpg?200|Cisco 2960-X switch}}
+New (to me) switch from eBay, cost all of £5.00 inc postage... Gigabit on all ports and POE but just a bit different to the previous 3750's I had. In addition to the 24 (or 48) copper RJ-45, there are 4x SFP and an additional fastEthernet port intended for out of band management, no POE unsurprisingly.
+Also there is a Mini USB for serial as well as the RJ-45 serial console. This presents as ''/dev/ttyACM0''.
 ===== SFP =====
+<code>
+-core#sh interfaces transceiver
+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  Tx Power  Rx Power
+Port       (Celsius)    (Volts)  (dBm)     (dBm)
+---------  -----------  -------  --------  --------
+Gi1/0/49     49.5       3.36      -5.1      -3.0
+Gi1/0/50     52.5       3.34      -5.3      -3.9
+</code>
+<code>
+#sh interfaces transceiver properties
+...edited...
+Name : Gi1/0/48
+Administrative Speed: auto
+Administrative Duplex: auto
+Administrative Auto-MDIX: on
+Administrative Power Inline: enable  <-------- Copper RJ-45
+Operational Speed: auto
+Operational Duplex: auto
+Operational Auto-MDIX: on
+Media Type: 10/100/1000BaseTX        <--------
+Name : Gi1/0/49
+Administrative Speed: auto
+Administrative Duplex: auto
+Administrative Auto-MDIX: on
+Administrative Power Inline: N/A     <-------- Optical SFP
+Operational Speed: 1000
+Operational Duplex: full
+Operational Auto-MDIX: on
+Media Type: 1000BaseSX SFP           <--------
+</code>
+<code>
+#sh interfaces transceiver detail
+...edited...
+           Optical            High Alarm  High Warn  Low Warn   Low Alarm
+           Receive Power      Threshold   Threshold  Threshold  Threshold
+Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
+-------    -----------------  ----------  ---------  ---------  ---------
+Gi1/0/49    -3.0                 0.0        -0.5       -23.5      -24.1
+Gi1/0/50    -3.9                 0.0        -0.5       -23.5      -24.1
+</code>