Cisco Cisco IOS Software Release 12.2(52)SE
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Release Notes for the Catalyst 3550-24-DC Multilayer Switch, Cisco IOS Release 12.2(52)SE
OL-19712-01
Installation Notes
This example shows how to download an image from a TFTP server at 198.30.20.19 and to overwrite
the image on the switch:
the image on the switch:
Switch# archive download-sw /overwrite tftp://198.30.20.19/c3550-i5q3l2-tar.122-50.SE1.tar
You can also download the image file from the TFTP server to the switch and keep the current image by
replacing the /overwrite option with the /leave-old-sw option.
replacing the /overwrite option with the /leave-old-sw option.
Upgrading with a Nondefault System MTU Setting
If the switch was running Cisco IOS Release 12.1(8)EA1c or earlier and you had used the system mtu
global configuration command to configure a nondefault system maximum transmission unit (MTU) size
on your switch, follow these steps to upgrade your switch to Cisco IOS Release 12.1(11)EA1 or later:
global configuration command to configure a nondefault system maximum transmission unit (MTU) size
on your switch, follow these steps to upgrade your switch to Cisco IOS Release 12.1(11)EA1 or later:
Step 1
Upgrade the Cisco IOS software to Cisco IOS Release 12.1(11)EA1 or later.
Step 2
If a system MTU size of greater than 2000 is configured on a Gigabit Ethernet switch (Catalyst 3550-12T
or Catalyst 3550-12G) use the system mtu global configuration command to set it to the maximum
supported MTU size. The maximum allowable system MTU for Catalyst 3550 Gigabit Ethernet switches
is 2000 bytes.
or Catalyst 3550-12G) use the system mtu global configuration command to set it to the maximum
supported MTU size. The maximum allowable system MTU for Catalyst 3550 Gigabit Ethernet switches
is 2000 bytes.
Step 3
Save the running configuration by entering the copy running-config startup-config privileged EXEC
command.
command.
Step 4
Reload the switch with the new Cisco IOS software.
Step 5
When the switch comes back up with Cisco IOS Release 12.1(11)EA1 or later, reload the switch a second
time by using the reload privileged EXEC command so that the system mtu command takes effect.
time by using the reload privileged EXEC command so that the system mtu command takes effect.
Recovering from a Software Failure
If the software fails, you can reload the software. For detailed recovery procedures, see the
“Troubleshooting” chapter in the software configuration guide.
“Troubleshooting” chapter in the software configuration guide.
Installation Notes
You can assign IP information to your switch by using one of these methods:
•
Express Setup program, as described in the switch getting started guide.
•
CLI-based setup program, as described in the switch hardware installation guide.
•
DHCP-based autoconfiguration, as described in the switch software configuration guide.
•
Manually assigned IP address, as described in the switch software configuration guide.
New Features
These sections describe the new supported hardware and the new software features provided in this
release:
release:
•