Copy running config startup config ошибка

Switch software can be corrupted during an upgrade by downloading the incorrect file to the switch, and by deleting the image
file. In all of these cases, the switch does not pass the power-on self-test (POST), and there is no connectivity.Follow the steps described in the Recovering from a Software Failure section to recover from a software failure.

The default configuration for the device allows an end user with physical access to the device to recover from a lost password by interrupting the boot process during power-on and by entering a new password. These recovery
procedures require that you have physical access to the device.

Note

On these devices, a system administrator can disable some of the functionality of this feature by allowing an end user to reset a password only by agreeing to return to the default configuration. If you are an end user trying to reset a password when password recovery has been disabled, a status message reminds you to return to the default configuration during the recovery process.

Note	You cannot recover encryption password key, when Cisco WLC configuration is copied from one Cisco WLC to another (in case of an RMA).

Follow the steps described in the section Recovering from a Lost or Forgotten Password to recover from a lost or forgotten password.

A Power over Ethernet (PoE) switch port automatically supplies power to one of these connected devices if the switch detects
that there is no power on the circuit:

• a Cisco pre-standard powered device (such as a Cisco IP Phone or a Cisco Aironet Access Point)

• an IEEE 802.3af-compliant powered device

• an IEEE 802.3at-compliant powered device

A powered device can receive redundant power when it is connected to a PoE switch port and to an AC power source. The device
does not receive redundant power when it is only connected to the PoE port.

After the switch detects a powered device, the switch determines the device power requirements and then grants or denies power
to the device. The switch can also detect the real-time power consumption of the device by monitoring and policing the power
usage.

For more information, see the «Configuring PoE» chapter in the Interface and Hardware Component Configuration Guide (Catalyst 9300 Switches).

Refere the section Scenarios to Troubleshoot Power over Ethernet (PoE) for various PoE troubleshooting scenarios.

The Device supports IP ping, which you can use to test connectivity to remote hosts. Ping sends an echo request packet to an address
and waits for a reply. Ping returns one of these responses:

• Normal response—The normal response (hostname is alive) occurs in 1 to 10 seconds, depending on network traffic.

• Destination does not respond—If the host does not respond, a no-answer message is returned.

• Unknown host—If the host does not exist, an unknown host message is returned.

• Destination unreachable—If the default gateway cannot reach the specified network, a destination-unreachable message is returned.

• Network or host unreachable—If there is no entry in the route table for the host or network, a network or host unreachable message is returned.

Refere the section Executing Ping to understand how ping works.

The Layer 2 traceroute feature allows the switch to identify the physical path that a packet takes from a source device to
a destination device. Layer 2 traceroute supports only unicast source and destination MAC addresses. Traceroute finds the
path by using the MAC address tables of the Device in the path. When the Device detects a device in the path that does not support Layer 2 traceroute, the Device continues to send Layer 2 trace queries and lets them time out.

The Device can only identify the path from the source device to the destination device. It cannot identify the path that a packet takes
from source host to the source device or from the destination device to the destination host.

You can use IP traceroute to identify the path that packets take through the network on a hop-by-hop basis. The command output
displays all network layer (Layer 3) devices, such as routers, that the traffic passes through on the way to the destination.

Your Device can participate as the source or destination of the traceroute privileged EXEC command and might or might not appear as a hop in the traceroute command output. If the Device is the destination of the traceroute, it is displayed as the final destination in the traceroute output. Intermediate Device do not show up in the traceroute output if they are only bridging the packet from one port to another within the same VLAN.
However, if the intermediate Device is a multilayer Device that is routing a particular packet, this Device shows up as a hop in the traceroute output.

The traceroute privileged EXEC command uses the Time To Live (TTL) field in the IP header to cause routers and servers to generate specific
return messages. Traceroute starts by sending a User Datagram Protocol (UDP) datagram to the destination host with the TTL
field set to 1. If a router finds a TTL value of 1 or 0, it drops the datagram and sends an Internet Control Message Protocol
(ICMP) time-to-live-exceeded message to the sender. Traceroute finds the address of the first hop by examining the source
address field of the ICMP time-to-live-exceeded message.

To identify the next hop, traceroute sends a UDP packet with a TTL value of 2. The first router decrements the TTL field by
1 and sends the datagram to the next router. The second router sees a TTL value of 1, discards the datagram, and returns the
time-to-live-exceeded message to the source. This process continues until the TTL is incremented to a value large enough for
the datagram to reach the destination host (or until the maximum TTL is reached).

To learn when a datagram reaches its destination, traceroute sets the UDP destination port number in the datagram to a very
large value that the destination host is unlikely to be using. When a host receives a datagram destined to itself containing
a destination port number that is unused locally, it sends an ICMP port-unreachable error to the source. Because all errors except port-unreachable errors come from intermediate hops, the receipt of a port-unreachable
error means that this message was sent by the destination port.

Go to Example: Performing a Traceroute to an IP Host to see an example of IP traceroute process.

Caution

Because debugging output is assigned high priority in the CPU process, it can render the system unusable. For this reason, use debug commands only to troubleshoot specific problems or during troubleshooting sessions with Cisco technical support staff. It is best to use debug commands during periods of lower network traffic and fewer users. Debugging during these periods decreases the likelihood that increased debug command processing overhead will affect system use.

All debug commands are entered in privileged EXEC mode, and most debug commands take no arguments.

System reports or crashinfo files save information that helps Cisco technical support representatives to debug problems that
caused the Cisco IOS image to fail (crash). It is necessary to quickly and reliably collect critical crash information with
high fidelity and integrity. Further, it is necessary to collect this information and bundle it in a way that it can be associated
or identified with a specific crash occurrence.

System reports are generated in these situations:

• In case of a switch failure—A system report is generated on the member that failed; reports are not generated on other members
  in the stack.

• In case of a switchover—System reports are generated only on high availability (HA) member switches. reports are not generated
  for non-HA members.

The system does not generate reports in case of a reload.

During a process crash, the following is collected locally from the switch:

1. Full process core

2. Tracelogs

3. IOS syslogs (not guaranteed in case of non-active crashes)

4. System process information

5. Bootup logs

6. Reload logs

7. Certain types of /proc information

This information is stored in separate files which are then archived and compressed into one bundle. This makes it convenient
to get a crash snapshot in one place, and can be then moved off the box for analysis. This report is generated before the
switch goes down to rommon/bootloader.

Except for the full core and tracelogs, everything else is a text file.

Use the request platform software process core fed active command to generate the core dump.

h2-macallan1# request platform software process core fed active
Process : fed main event (28155) encountered fatal signal 6
Process : fed main event stack :

SUCCESS: Core file generated.

h2-macallan1#dir bootflash:core
Directory of bootflash:/core/

178483  -rw-                1  May 23 2017 06:05:17 +00:00  .callhome
194710  drwx             4096  Aug 16 2017 19:42:33 +00:00  modules
178494  -rw-         10829893  Aug 23 2017 09:46:23 +00:00  h2-macallan1_RP_0_fed_28155_20170823-094616-UTC.core.gz

Crashinfo Files

By default the system report file will be generated and saved into the /crashinfo directory. Ifit cannot be saved to the crashinfo
partition for lack of space, then it will be saved to the /flash directory.

To display the files, enter the dir crashinfo: command. The following is sample output of a crashinfo directory:

Switch#dir crashinfo:
Directory of crashinfo:/


23665 drwx 86016 Jun 9 2017 07:47:51 -07:00 tracelogs
11 -rw- 0 May 26 2017 15:32:44 -07:00 koops.dat
12 -rw- 4782675 May 29 2017 15:47:16 -07:00 system-report_1_20170529-154715-PDT.tar.gz
1651507200 bytes total (1519386624 bytes free)

System reports are located in the crashinfo directory in the following format:

system-report_[switch number]_[date]-[timestamp]-UTC.gz

After a switch crashes, check for a system report file. The name of the most recently generated system report file is stored
in the last_systemreport file under the crashinfo directory. The system report and crashinfo files assist TAC while troubleshooting
the issue.

The system report generated can be further copied using TFTP, HTTP and few other options.

Switch#copy crashinfo: ?
crashinfo:     Copy to crashinfo: file system 
flash:         Copy to flash: file system
ftp:           Copy to ftp: file system 
http:          Copy to http: file system 
https:         Copy to https: file system 
null:          Copy to null: file system
nvram:         Copy to nvram: file system
rcp:           Copy to rcp: file system
running-config Update (merge with) current system configuration
scp:           Copy to scp: file system
startup-config Copy to startup configuration
syslog:        Copy to syslog: file system
system:        Copy to system: file system
tftp:          Copy to tftp: file system
tmpsys:        Copy to tmpsys: file system

The general syntax for copying onto TFTP server is as follows:

Switch#copy crashinfo: tftp:
Source filename [system-report_1_20150909-092728-UTC.gz]?
Address or name of remote host []? 1.1.1.1
Destination filename [system-report_1_20150909-092728-UTC.gz]?

The tracelogs from all members in the stack can be collected by issuing a trace archive command. This command provides time period options. The command syntax is as
follows:

Switch#request platform software trace archive ?
last     Archive trace files of last x days
target   Location and name for the archive file

The tracelogs stored in crashinfo: or flash: directory from within the last 3650 days can be collected.

Switch# request platform software trace archive last ?
<1-3650> Number of days (1-3650)
Switch#request platform software trace archive last 3650 days target ?
crashinfo: Archive file name and location
flash:     Archive file name and location

Note	It is important to clear the system reports or trace archives from flash or crashinfo directory once they are copied out, in order to have space available for tracelogs and other purposes.

You can use the onboard failure logging (OBFL) feature to collect information about the Device. The information includes uptime, temperature, and voltage information and helps Cisco technical support representatives
to troubleshoot Device problems. We recommend that you keep OBFL enabled and do not erase the data stored in the flash memory.

By default, OBFL is enabled. It collects information about the Device and small form-factor pluggable (SFP) modules. The Device stores this information in the flash memory:

• CLI commands—Record of the OBFL CLI commands that are entered on a standalone Device or a switch stack member.

• Environment data—Unique device identifier (UDI) information for a standalone Device
  or a switch stack member and for all the connected FRU devices: the product identification (PID), the version identification (VID), and the serial
  number.

• Message—Record of the hardware-related system messages generated by a standalone Device
  or a switch stack member.

• Power over Ethernet (PoE)—Record of the power consumption of PoE ports on a standalone Device
  or a switch stack member.

• Temperature—Temperature of a standalone Device
  or a switch stack member.

• Uptime data—Time when a standalone Device
  or a switch stack member starts, the reason the Device restarts, and the length of time the Device has been running since it last restarted.

• Voltage—System voltages of a standalone Device
  or a switch stack member.

You should manually set the system clock or configure it by using Network Time Protocol (NTP).

When the Device is running, you can retrieve the OBFL data by using the show logging onboard privileged EXEC commands. If the Device fails, contact your Cisco technical support representative to find out how to retrieve the data.

When an OBFL-enabled Device is restarted, there is a 10-minute delay before logging of new data begins.

By default, the feature is disabled. When more than one of the fans fails in a field-replaceable unit (FRU) or in a power
supply, the device does not shut down, and this error message appears:

Multiple fan(FRU/PS) failure detected. System may get overheated. Change fan quickly.

The Device might overheat and shut down.

To enable the fan failures feature, enter the system env fan-fail-action shut privileged EXEC command. If more than one fan in the Device fails, the Device automatically shuts down, and this error message appears:

Faulty (FRU/PS) fans detected, shutting down system! 

After the first fan shuts down, if the Device detects a second fan failure, the Device waits for 20 seconds before it shuts down.

To restart the Device, it must be power cycled.

For more information on Fan failures, refer Cisco Catalyst 9400 Series Switches Hardware Installaion Guide

Excessive CPU utilization might result in these symptoms, but the symptoms might also result from other causes, some of which
are the following:

• Spanning tree topology changes

• EtherChannel links brought down due to loss of communication

• Failure to respond to management requests (ICMP ping, SNMP timeouts, slow Telnet or SSH sessions)

• UDLD flapping

• IP SLAs failures because of SLAs responses beyond an acceptable threshold

• DHCP or IEEE 802.1x failures if the switch does not forward or respond to requests

If you replace a stack member with an identical model, the new Device functions with the exact same configuration as the replaced Device. This is also assuming the new Device is using the same member number as the replaced Device.

Removing powered-on stack members causes the switch stack to divide (partition) into two or more switch stacks, each with
the same configuration. If you want the switch stacks to remain separate, change the IP address or addresses of the newly
created switch stacks. To recover from a partitioned switch stack, follow these steps:

1. Power off the newly created switch stacks.

2. Reconnect them to the original switch stack through their StackWise Plus ports.

3. Power on the Device.

For the commands that you can use to monitor the switch stack and its members, see the Displaying Switch Stack Information section.

The IEEE 802.3ab autonegotiation protocol manages the device settings for speed (10 Mb/s, 100 Mb/s, and 1000 Mb/s, excluding
SFP module ports) and duplex (half or full). There are situations when this protocol can incorrectly align these settings,
reducing performance. A mismatch occurs under these circumstances:

• A manually set speed or duplex parameter is different from the manually set speed or duplex parameter on the connected port.

• A port is set to autonegotiate, and the connected port is set to full duplex with no autonegotiation.

To maximize the device performance and ensure a link, follow one of these guidelines when changing the settings for duplex
and speed:

• Let both ports autonegotiate both speed and duplex.

• Manually set the speed and duplex parameters for the ports on both ends of the connection.

Note	If a remote device does not autonegotiate, configure the duplex settings on the two ports to match. The speed parameter can adjust itself even if the connected port does not autonegotiate.

Cisco small form-factor pluggable (SFP) modules have a serial EEPROM that contains the module serial number, the vendor name
and ID, a unique security code, and cyclic redundancy check (CRC). When an SFP module is inserted in the Device, the Device software reads the EEPROM to verify the serial number, vendor name and vendor ID, and recompute the security code and CRC.
If the serial number, the vendor name or vendor ID, the security code, or CRC is invalid, the software generates a security
error message and places the interface in an error-disabled state.

Note	The security error message references the GBIC_SECURITY facility. The Device supports SFP modules and does not support GBIC modules. Although the error message text refers to GBIC interfaces and modules, the security messages actually refer to the SFP modules and module interfaces.

If you are using a non-Cisco SFP module, remove the SFP module from the Device, and replace it with a Cisco module. After inserting a Cisco SFP module, use the errdisable recovery cause gbic-invalid global configuration command to verify the port status, and enter a time interval for recovering from the error-disabled
state. After the elapsed interval, the Device brings the interface out of the error-disabled state and retries the operation. For more information about the errdisable recovery command, see the command reference for this release.

If the module is identified as a Cisco SFP module, but the system is unable to read vendor-data information to verify its
accuracy, an SFP module error message is generated. In this case, you should remove and reinsert the SFP module. If it continues
to fail, the SFP module might be defective.

To determine if high CPU utilization is a problem, enter the show processes cpu sorted privileged EXEC command. Note the underlined information in the first line of the output example.

Device# show processes cpu sorted
CPU utilization for five seconds: 8%/0%; one minute: 7%; five minutes: 8%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 
309 42289103 752750 56180 1.75% 1.20% 1.22% 0 RIP Timers 
140 8820183 4942081 1784 0.63% 0.37% 0.30% 0 HRPC qos request 
100 3427318 16150534 212 0.47% 0.14% 0.11% 0 HRPC pm-counters 
192 3093252 14081112 219 0.31% 0.14% 0.11% 0 Spanning Tree 
143 8 37 216 0.15% 0.01% 0.00% 0 Exec 
...
<output truncated>

This example shows normal CPU utilization. The output shows that utilization for the last 5 seconds is 8%/0%, which has this
meaning:

• The total CPU utilization is 8 percent, including both time running Cisco IOS processes and time spent handling interrupts.

• The time spent handling interrupts is zero percent.

This example shows how to ping an IP host:

Device# ping 172.20.52.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echoes to 172.20.52.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Device#

To end a ping session, enter the escape sequence (Ctrl-^ X by default). Simultaneously press and release the Ctrl, Shift, and 6 keys and then press the X key.

This example shows how to perform a traceroute to an IP host:

Device# traceroute ip 192.0.2.10

Type escape sequence to abort.
Tracing the route to 192.0.2.10

  1 192.0.2.1 0 msec 0 msec 4 msec
  2 192.0.2.203 12 msec 8 msec 0 msec
  3 192.0.2.100 4 msec 0 msec 0 msec
  4 192.0.2.10 0 msec 4 msec 0 msec
   

The display shows the hop count, the IP address of the router, and the round-trip time in milliseconds for each of the three
probes that are sent.

To end a trace in progress, enter the escape sequence (Ctrl-^ X by default). Simultaneously press and release the Ctrl, Shift, and 6 keys and then press the X key.