Difference between revisions of "Loading IOS on a WS-C3850 Switch"

Latest revision as of 10:16, 18 June 2018

Connect to the serial console
Connect the Mgmt interface to your network
Configure the Mgmt network interface (that's GigabitEthernet 0/0)
Test connectivity:
- ping vrf Mgmt-intf 192.168.1.11 or
- ping vrf Mgmt-vrf 192.168.1.11
Set Mgmt interface as interface to use for TFTP transfer:
- conf t
- ip tftp source-interface gigabitEthernet 0/0
- exit
Copy the .bin file to flash: via TFTP
- copy tftp: flash:
Install the .bin file using this command:
- software install file flash:cat3k_caa-universalk9.SPA.03.07.01.E.152-3.E1.bin
- Answer yes when asked if you want to relaod the switch
- Answer no when asked if you want to save the configuration
If you have a stack of 3850 switches, this only needs to be done on one stack member. The software will be upgraded on all stack members.

Configure network connectivity as above
Clean old packages: request platform software package clean switch all file flash: (confirm with "y")
Copy new bin file from tftp server to flash
Install (downgrade to) new bin file: request platform software package install switch all file flash:whatever-filename.bin new auto-copy

@@ Line 6: / Line 6: @@
 ** <code>ping vrf Mgmt-vrf 192.168.1.11</code>
 * Set Mgmt interface as interface to use for TFTP transfer:
+** <code>conf t</code>
 ** <code>ip tftp source-interface gigabitEthernet 0/0</code>
+** <code>exit</code>
 * Copy the <code>.bin</code> file to <code>flash:</code> via TFTP
 ** <code>copy tftp: flash:</code>
@@ Line 13: / Line 15: @@
 ** Answer ''yes'' when asked if you want to relaod the switch
 ** Answer ''no'' when asked if you want to save the configuration
+* If you have a stack of 3850 switches, this only needs to be done on one stack member. The software will be upgraded on all stack members.
+If downgrading from a newer IOS version, you may have to follow these instructions: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/16-3/release_notes/ol-16-3-3850.html#34555
+In a nutshell:
+* Configure network connectivity as above
+* Clean old packages: <code>request platform software package clean switch all file flash:</code> (confirm with "y")
+* Copy new bin file from tftp server to flash
+* Install (downgrade to) new bin file: <code>request platform software package install switch all file flash:whatever-filename.bin new auto-copy</code>