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Use the set spantree root command to set the primary or secondary root for specific VLANs of the switch or for all VLANs of the switch.
set spantree root [secondary] [vlan_list] [dia network_diameter]
Syntax Description
secondary (Optional) Keyword that specifies to designate this switch as a secondary root, if the primary root fails. vlan_list (Optional) Number of the VLAN. If you do not specify a VLAN number, VLAN 1 is used; valid values are 1 to 1005. dia network_diameter (Optional) Keyword that specifies the maximum number of bridges between any two points of attachment of end stations. Valid values of network_diameter are 2 through 7. hello hello_time (Optional) Keyword that specifies in seconds, the duration between generation of configuration messages by the root switch; valid values of hello_time are 1 to 10.
Defaults
If the secondary keyword is not specified, the default is to make the switch the primary root.
The default value of the network_diameter is 7.
If not specified, the current value of hello_time from the NVRAM is used.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command runs on backbone or distribution switches.
You can run the secondary root many times to create backup switches in case of a root failure.
The secondary command reduces the bridge priority value to 16384.
This command increases path costs to a value greater than 3000.
Examples
This example shows how to use the set spantree root command:
Console>(enable) set spantree root 1-10 dia 4 VLANs 1-10 bridge priority set to 8192 VLANs 1-10 bridge max aging time set to 14 seconds. VLANs 1-10 bridge hello time set to 2 seconds. VLANs 1-10 bridge forward delay set to 9 seconds. Switch is now the root switch for active VLANs 1-6. Console> (enable)
This example shows that setting the bridge priority to 8192 was not sufficient to make this switch the root. So, the priority was further reduced to 7192 (100 less than the current root switch) to make this switch the root switch. However, reducing it to this value did not make it the root switch for active VLANs 16 and 17.
Console>(enable) set spantree root 11-20. VLANs 11-20 bridge priority set to 7192 VLANs 11-10 bridge max aging time set to 20 seconds. VLANs 1-10 bridge hello time set to 2 seconds. VLANs 1-10 bridge forward delay set to 13 seconds. Switch is now the root switch for active VLANs 11-15,18-20. Switch could not become root switch for active VLAN 16-17. Console> (enable) Console>(enable) set spantree root secondary 22,24 dia 5 hello 1 VLANs 22,24 bridge priority set to 16384. VLANs 22,24 bridge max aging time set to 10 seconds. VLANs 22,24 bridge hello time set to 1 second. VLANs 22,24 bridge forward delay set to 7 seconds. Console> (enable)
Related Commands
show spantree
clear spantree root
Use the set spantree uplinkfast command to enable fast switchover to alternate ports when the root port fails. This command applies to a switch, not to a WAN.
set spantree uplinkfast enable [rate station_update_rate] [all-protocols {off | on}]
Syntax Description
enable Keyword that enables a fast switchover. rate (Optional) Keyword that specifies the number of multicast packets transmitted per 100 ms when an alternate port is chosen after the root port goes down. station_update_rate (Optional) Number of multicast packets transmitted per 100 ms when an alternate port is chosen after the root port goes down. all-protocols (Optional) Keyword that specifies whether the switch generates dummy multicast packets for all protocol groups (IP, IPX, and Group) in a network with switches using protocol filtering. off (Optional) Keyword that specifies to prevent the switch from generating multicasts for all protocol groups. on (Optional) Keyword that specifies to cause the switch to generate multicasts for all protocol groups. disable Keyword that disables fast switchover.
Defaults
The default station_update_rate is 15 packets per 100 ms.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
The set spantree uplinkfast enable command has the following results:
If you run set spantree uplinkfast enable on a switch that has this feature already enabled, only the station update rate is updated. The rest of the parameters are not modified.
If you run set spantree uplinkfast disable on a switch, the UplinkFast feature is disabled but the switch priority and port cost values are not reset to the factory defaults. To reset the values to the factory defaults, enter the clear spantree uplinkfast command.
The default station_update_rate value is 15 packets per 100 ms, which is equivalent to a 1 percent load on a 10-Mbps Ethernet port. If you specify this value as 0, the switch does not generate station-update-rate packets.
Use the all-protocols on keywords on switches that have UplinkFast enabled but do not have protocol filtering enabled, and that are connected to upstream switches in the network that have protocol filtering enabled. The all-protocols on keywords cause the switch to generate multicasts for each protocol-filtering group.
On switches with both UplinkFast and protocol filtering enabled, or if no other switches have protocol filtering enabled, you do not need to use the all-protocols on keywords.
Examples
This example shows how to enable the spantree UplinkFast feature and specify the number of multicast packets transmitted to 40 packets per 100 ms:
Console>(enable) set spantree uplinkfast enable rate 40 VLANs 1-1000 bridge priority set to 49152. The port cost and portvlancost of all ports increased to above 3000. Station update rate set to 40 packets/100ms. uplinkfast turned on for bridge. Console> (enable)
This example shows how to disable the spantree UplinkFast feature:
console> (enable) set spantree uplinkfast disable Uplinkfast disabled for switch. Use clear spantree uplinkfast to return stp parameters to default. console>(enable) clear spantree uplink This command will cause all portcosts, portvlancosts, and the bridge priority on all vlans to be set to default. Do you want to continue (y/n) [n]? y VLANs 1-1005 bridge priority set to 32768. The port cost of all bridge ports set to default value. The portvlancost of all bridge ports set to default value. uplinkfast disabled for bridge. Console> (enable)
This example shows how to enable the all-protocols feature:
Console> (enable) set spantree uplinkfast enable all-protocols on uplinkfast update packets enabled for all protocols. uplinkfast already enabled for bridge.
This example shows how to disable the all-protocols feature:
Console> (enable) set spantree uplinkfast disable all-protocols off uplinkfast all-protocols field set to off. uplinkfast already enabled for bridge. Console> (enable)
Related Commands
show spantree
clear spantree uplinkfast
Use the set standbyports command to enable or disable the standby ports feature. The standby ports feature allows the ports on the standby supervisor engine module to pass traffic. If this feature is disabled, the ports are in standby mode.
set standbyports enable | disable
Syntax Description
enable Keyword that specifies to enable the standby ports feature. disable Keyword that specifies to disable the standby ports feature.
Defaults
The default is disabled. However, if upgrading from supervisor engine software release 4.1 or 4.2, the standby ports feature remains enabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
Examples
This example shows how to enable the standby ports feature:
Console> (enable) set standbyports enable Standby ports feature enabled. Please wait while the standby ports are coming up. Console> (enable)
This example shows how to disable the standby ports feature:
Console> (enable) set standbyports disable Standby ports feature disabled. Console> (enable)
Related Commands
Use the set station softerror command to enable or disable the collection of soft error statistics, and define error thresholds and sampling intervals on a Token Ring module or on a specific port on the module.
set station softerror mod_num[/port_num] disable | enable [threshold thres_num
Syntax Description
mod_num Number of the module. port_num (Optional) Number of the port on the module. disable Keyword that specifies soft error statistics to not be collected for the stations on a module or on a specific port on a module. enable Keyword that specifies soft error statistics to be collected for the stations on a module or on a specific port on a module. threshold (Optional) Keyword that specifies the number of soft errors reported from a station connected to a port that if exceeded causes a soft error exceeded trap to be issued. Valid values are 1 to 255. The default is 100. interval (Optional) Keyword that specifies the sampling period (in seconds) during which the number of soft errors is monitored for each station connected to a port. Valid values are 0 to 65534. The default is 60. To disable soft error exceeded traps, set the interval to zero. Without traps, soft errors can still be monitored through the console.
thres_num
int_num
Defaults
The default configuration has soft error monitoring disabled. The default error threshold is 100. The default interval is 60.
Command Types
Switch command
Command Modes
Privileged
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
Examples
This example shows how to enable the collection of soft error statistics for port 10 on module 3:
Console> (enable) set station softerror 3/10 enable Port 3/10 soft error monitoring enabled. Console> (enable)
This example sets the error threshold to 100 and the sampling interval to 200 for port 10 on module 3:
Console> (enable) set station softerror 3/10 threshold 100 interval 200 Port 3/10 station soft error threshold set to 100, interval set to 200 Console> (enable)
Related Commands
clear station
clear station counters
show station softerror config
show station softerror counters
Use the set summertime command to specify whether the system should set the clock ahead one hour during daylight saving time.
set summertime {enable | disable} [zone]
Syntax Description
enable Keyword that causes the system to set the clock ahead one hour during daylight saving time. disable Keyword that prevents the system from setting the clock ahead one hour during daylight saving time. zone (Optional) Time zone used by the set summertime command. week Keyword that specifies the week of the month (first, second, third, fourth, last, 1...5). day Keyword that specifies the day of the week (Sunday, Monday, Tuesday, etc.). month Keyword that specifies the month of the year (January, February, March, etc.). hh:mm Keyword that specifies the time, both hours and minutes. offset (Optional) Amount of offset in minutes (1-1440 minutes). date Keyword that specifies the day of the month (1—31). year Keyword that specifies the year (1993—2035).
Defaults
By default, the set summertime command is disabled. When the command is enabled, the default for offset is 60 minutes, following U.S. standards.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
After the clear config command is entered, the dates and times are set back to the default.
Unless otherwise configured, this command advances the clock one hour at 2:00 a.m. on the first Sunday in April and moves back the clock one hour at 2:00 a.m. on the last Sunday in October.
Examples
This example shows how to cause the system to set the clock ahead one hour during daylight saving time:
Console> (enable) set summertime enable PDT Summertime is enabled and set to "PDT". Console> (enable)
This example shows how to prevent the system from setting the clock ahead one hour during daylight saving time:
Console> (enable) set summertime disable Summertime disabled. Console> (enable)
This example shows how to set daylight savings time to zonename "AUS," repeat every year, starting from the third Monday of February at noon and ending at the second Saturday of August at
3:00 p.m. with an offset of 30 minutes:
Console> (enable) set summertime recurring 3 Mon Feb 03:00 4 Thursday oct 08:00 500 Command authorization none. Summertime is enabled and set to '' start: Mon Feb 21 2000, 03:00:00 end: Fri Oct 20 2000. 08:00:00 offset: 1..1440 minutes (default 60) Recurring: yes, starting at 03:00:00am of third Monday of February and ending on 08:00am of fourth Thursday of October. Console> (enable)
This example shows how to set the daylight savings time to start on January 29, 1999 at 2:00 a.m. and end on August 19, 2004 at 3:00 p.m. with an offset of 30 minutes:
Console> (enable) set summertime date jan 29 1999 02:00 aug 19 2004 15:00 30 Summertime is disabled and set to '' Start : Fri Jan 29 1999, 02:00:00 End : Thu Aug 19 2004, 15:00:00 Offset: 30 minutes Recurring: no Console> (enable)
Related Commands
Use the set switchacceleration command to increase the switching bandwidth of the switch.
set switchacceleration {enable | disable} mod_num
Syntax Description
enable Keyword that activates switch acceleration. disable Keyword that deactivates switch acceleration. mod_num Number of the module.
Defaults
The default is switch acceleration is disabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 4000 family switches.
The set switchacceleration command is valid only on Catalyst 4000 family switches with Supervior Engine II. To enable switch acceleration on the switch, you must disable both the ports on it. Switch acceleration on the switch can be disabled without any conditions.
Examples
This example shows how to enable switch acceleration on port 1 of module 1 on the switch:
Console> (enable) set port disable 1/1-2 Port(s) 1/1-2 disabled. Console> (enable) Console> (enable) set switchacceleration enable 1 Enabling or Disabling switch acceleration may impact performance for 1-2 seconds. Do you want to continue (y/n) [n]?y Switch Acceleration on module 1 enabled.
Console> (enable)
This example shows how to disable switch acceleration on port 1 of module 1 on the switch:
Console> (enable) set switchacceleration disable 1 Enabling or Disabling switch acceleration may impact performance for 1-2 seconds. Do you want to continue (y/n) [n]?y Switch Acceleration on module 1 disabled. Console> (enable)
Related Commands
Use the set system baud command to set the console port baud rate.
set system baud rate
Syntax Description
rate Baud rate. Valid rates are 600, 1200, 2400, 4800, 9600, 19200, and 38400.
Defaults
The default value is 9600 baud.
Command Types
Switch command.
Command Modes
Privileged.
Examples
This example shows how to set the system baud rate to 19200:
Console> (enable) set system baud 19200 System console port baud rate set to 19200. Console> (enable)
Related Commands
Use the set system contact command to identify a contact person for the system.
set system contact [contact_string]
Syntax Description
contact_string (Optional) Text string that contains the name of the person to contact for system administration. If no contact string is specified, the system contact string is cleared.
Defaults
The default configuration has no system contact configured.
Command Types
Switch command.
Command Modes
Privileged.
Examples
This example shows how to set the system contact string:
Console> (enable) set system contact Xena ext.24 System contact set. Console> (enable)
Related Commands
Use the set system countrycode command to specify the country where the system is physically located.
set system countrycode code
Syntax Description
code Country code; see the "Usage Guidelines" section for format information.
Defaults
The default is US (United States).
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
The country code is a 2-letter country code taken from ISO-3166 (for example, VA=Holy See (Vatican City State) , VU=Vanuatu, and TF=French Southern Territories).
Examples
This example shows how to set the system country code:
Console> (enable) set system countrycode US Country code is set to US. Console> (enable)
Use the set system location command to identify the location of the system.
set system location [location_string]
Syntax Description
location_string (Optional) Text string that indicates where the system is located. If no location string is specified, the system location is cleared.
Defaults
This command has no default setting.
Command Types
Switch command.
Command Modes
Privileged.
Examples
This example shows how to set the system location string:
Console> (enable) set system location Closet 230 4/F System location set. Console> (enable)
Related Commands
Use the set system modem command to enable or disable modem control lines on the console port.
set system modem {enable | disable}
Syntax Description
enable Keyword that specifies to activate modem control lines on the console port. disable Keyword that specifies to deactivate modem control lines on the console port.
Defaults
The default configuration has modem control lines disabled.
Command Types
Switch command.
Command Modes
Privileged.
Examples
This example shows how to enable modem control lines on the console port:
Console> (enable) set system modem enable Modem control lines enabled on console port. Console> (enable)
This example shows how to disable modem control lines on the console port:
Console> (enable) set system modem disable Modem control lines disabled on console port. Console> (enable)
Related Commands
Use the set system name command to configure a name for the system.
set system name [name_string]
Syntax Description
name_string (Optional) Text string that identifies the system.
Defaults
The default configuration has no system name configured.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
In Catalyst 5000 family and 2926G series software release 4.1(1) and later, and Catalyst 4000 family, 2948G, and 2980G software release 4.4 and later, if you use the set system name command to assign a name to the switch, the switch name is used as the prompt string. However, if you specify a different prompt string using the set prompt command, that string is used for the prompt. If no name is specified, the system name is cleared.
In Catalyst 5000 family and 2926G series software release 4.1(1) and later, if you do not specify a system name, the system name is cleared, and a DNS lookup is initiated for a system name. If a name is found, that is the name used; if no name is found, no name is designated.
The system name can be 255 characters long, and the prompt can be 20 characters long. The system name is truncated appropriately when used as a prompt; a greater-than symbol (>) is appended to the truncated system name. If the system name was found from a DNS lookup, it is truncated to remove the domain name. If the prompt is obtained using the system name, it is updated whenever the system name changes. You can overwrite this prompt any time by setting the prompt manually. Any change in the prompt is reflected in all current open sessions.
Examples
This example shows how to set the system name to Information Systems:
Console> (enable) set system name Information Systems System name set. Console> (enable)
Related Commands
Use the set tacacs attempts command to configure the maximum number of login attempts allowed to the TACACS+ server.
set tacacs attempts count
Syntax Description
count Number of login attempts allowed (1 to 10).
Defaults
The default value for this command is 3.
Command Types
Switch command.
Command Modes
Privileged.
Examples
This example shows how to configure the TACACS+ server to allow a maximum of six login attempts:
Console> (enable) set tacacs attempts 6 Tacacs number of attempts set to 6. Console> (enable)
Related Commands
Use the set tacacs directedrequest command to enable or disable the TACACS+ directed-request option. When enabled, you can direct a request to any of the configured TACACS+ servers and only the username is sent to the specified server.
set tacacs directedrequest {enable | disable}
Syntax Description
enable Keyword that specifies to send the portion of the address before the @ sign (the username) to the host specified after the @ sign. disable Keyword that specifies to send the entire address string to the default TACACS+ server.
Defaults
This default configuration has the TACACS+ directed-request option disabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
When tacacs directedrequest is enabled, you must specify a configured TACACS+ server after the @ sign. If the specified host name does not match the IP address of a configured TACACS+ server, the request is rejected. When tacacs directedrequest is disabled, the Catalyst 5000 family, 4000 family, 2926G series, 2948G, and 2980G switch queries the list of servers beginning with the first server in the list and then sends the entire string, accepting the first response from the server. This command is useful for sites that have developed their own TACACS+ server software to parse the entire address string and make decisions based on the contents of the string.
Examples
This example shows how to enable the TACACS+ directed-request option:
Console> (enable) set tacacs directedrequest enable Tacacs direct request has been enabled. Console> (enable)
Related Commands
Use the set tacacs key command to set the key for TACACS+ authentication and encryption.
set tacacs key key
Syntax Description
key Printable ASCII characters used for authentication and encryption. Key length is limited to 100 characters.
Defaults
The default value of key is null.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
The key must be the same as the key used on the TACACS+ server. All leading spaces are ignored. Spaces within the key and at the end of the key are included. Double quotation marks are not required, even if there are spaces between words in the key, unless the quotation marks themselves are part of the key. The key can consist of any printable ASCII characters except the tab character.
Examples
This example shows how to set the authentication and encryption key:
Console> (enable) set tacacs key Who Goes There The tacacs key has been set to Who Goes There. Console> (enable)
Related Commands
Use the set tacacs server command to define a TACACS+ server.
set tacacs server ip_addr [primary]
Syntax Description
ip_addr IP address of the server on which the TACACS+ server resides. primary (Optional) Keyword that specifies to designate the specified server as the primary TACACS+ server.
Defaults
There is no default setting for this command.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
You can configure a maximum of three servers. The primary server, if configured, is contacted first. If no primary server is configured, the first server configured becomes the primary server.
Examples
This example shows how to configure the server on which the TACACS+ server resides and to designate it as the primary server:
Console> (enable) set tacacs server 170.1.2.20 primary 170.1.2.20 added to TACACS server table as primary server. Console> (enable)
Related Commands
Use the set tacacs timeout command to set the response timeout interval for the TACACS+ server daemon. The TACACS+ server must respond to a TACACS+ authentication request before this interval expires or the next configured server is queried.
set tacacs timeout seconds
Syntax Description
seconds Timeout response interval in seconds (1 to 255).
Defaults
The default value for this command is 5 seconds.
Command Types
Switch command.
Command Modes
Privileged.
Examples
This example shows how to set the response timeout interval for the TACACS+ server to 8 seconds:
Console> (enable) set tacacs timeout 8 Tacacs timeout set to 8 seconds. Console> (enable)
Related Commands
Use the set test diaglevel command to set the level of testing for Saint packet buffer testing.
set test diaglevel {complete | minimal | bypass}
Syntax Description
complete Keyword that specifies complete packet buffer testing. minimal Keyword that specifies minimal packet buffer testing. bypass Keyword that specifies to bypass packet buffer testing.
Defaults
This command has no default settings.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
This command is supported on the Catalyst 5000 family switches that have 100BaseFX and 10/100BaseTX Fast EtherChannel modules containing the Saint ASIC chip.
Examples
This example shows how to set the packet buffer testing level to complete:
Console> (enable) set test diaglevel complete Diagnostic level set to complete. Console> (enable)
This example shows how to set the packet buffer testing level to minimal:
Console> (enable) set test diaglevel minimal Diagnostic level set to minimal. Console> (enable)
This example shows how to set the packet buffer testing level to bypass:
Console> (enable) set test diaglevel bypass Diagnostic level set to bypass. Console> (enable)
Related Commands
set test packetbuffer
show test
test packetbuffer
Use the set test packetbuffer command to enable packet buffer testing.
set test packetbuffer {enable | disable}
Syntax Description
enable Keyword that specifies to enable packet buffer testing. disable Keyword that specifies to disable packet buffer testing. day_of_week Keyword that specifies the day to test packet buffers. Valid days are Monday through Sunday. hh:mm Keyword that specifies the time to start packet buffer testing. continuous Keyword that specifies continuous testing of packet buffers.
Defaults
A default pattern value of 0x55aa55aa55aa is used for complement.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported on the Catalyst 5000 family switches that have 100BaseFX and 10/100BaseTX Fast EtherChannel modules containing the Saint ASIC chip.
Recurring tests are run on enabled ports. All eligible Saint ports are tested. Non-Saint ports and faulty ports are skipped without warning or messages.
Before the test starts the estimated test time is printed. Estimated test time is six seconds per port for fixed pattern and twelve seconds per port for complement patterns. The test time is rounded to the nearst whole number.
Ports on the same module are tested sequentially. Ports on different modules are tested in parallel, this is the actual test time. The entire test duration is longer because of delays between each 128 test unit to allow traffic to continue. The following is the total estimated test duration per port:
(time interval + process time for one test unit) * packet buffer size/128.
The interval between two test units is two seconds.
Ports that fail the test will be marked faulty and cannot be reenabled until after the module has been reset.
Testing can be affected by clock adjustments. If the internal clock moves past the scheduled test time, the test may be skipped. Similarly, if the internal clock moves back before the scheduled test time, the test may be run twice.
Examples
This example shows how to enable packet buffer testing:
Console > (enable) set test packetbuffer enable Packet buffer test enabled. Console > (enable)
This example shows how to set packet buffer testing to occur weekly on Saturdays at 1:00 p.m.:
Console > (enable) set test packetbuffer sat 1:00 Packet buffer test will be run weekly on Saturdays at 01:00. Console > (enable)
This example shows how to set packet buffer testing to occur daily at 6:00 p.m.:
Console > (enable) set test packetbuffer 18:00 Packet buffer test will be run daily at 18:00. Console > (enable)
This example shows how to continously test packet buffers:
Console > (enable) set test packetbuffer continuous Packet buffer test will be run continuously.
This example shows how to disable packet buffer testing:
Console > (enable) set test packetbuffer disable Packet buffer test disabled. Console > (enable)
Related Commands
set test diaglevel
show test
test packetbuffer
Use the set time command to change the time of day on the system clock.
set time [day_of_week] [mm/dd/yyyy] [hh:mm:ss]
Syntax Description
day_of_week (Optional) Day of the week. mm/dd/yyyy (Optional) Month, day, and year. hh:mm:ss (Optional) Current time in 24-hour format.
Defaults
This command has no default setting.
Command Types
Switch command.
Command Modes
Privileged.
Examples
This example shows how to set the system clock to Sunday, March 21, 2000, 7:50 a.m:
Console> (enable) set time sun 3/21/2000 7:50 Sun Mar 21 2000, 07:50:00 Console> (enable)
Related Commands
Use the set timezone command to set the time zone for the system.
set timezone [zone_name] [hours [minutes]]
Syntax Description
zone_name (Optional) Name of the time zone to be displayed. hours (Optional) Number of hours offset from UTC; valid values are -12 to 12. minutes (Optional) Number of minutes offset from UTC. If the specified hours value is a negative number, then the minutes value is assumed to be negative as well; valid values are 0 to 59.
Defaults
By default, the time zone is set to UTC.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
The set timezone command is effective only when NTP is running. If you set the time explicitly and NTP is disengaged, the set timezone command has no effect. If you have enabled NTP and have not entered the set timezone command, the Catalyst 5000 family, 4000 family, 2926G series, 2948G, and 2980G switch displays UTC by default.
Examples
This example shows how to set the time zone to Pacific Standard Time with an offset of minus 8 hours from UTC:
Console> (enable) set timezone PST -8 Timezone set to "PST", offset from UTC is -8 hours. Console> (enable)
Related Commands
Use the set tokenring acbits command to specify whether AC bits are set unconditionally or conditionally when a port forwards certain LLC frames.
set tokenring acbits mod_num/port_num {enable | disable | sronly | never | always}
Syntax Description
mod_num Number of the module. port_num Number of the port on the module. enable Keyword that specifies to unconditionally set the AC bits on source-routed frames with a RIF length greater than 2 and on all explorer frames, and to set the AC bits on all frames forwarded to another port. This parameter is only valid when local address learning is enabled on a port. Therefore, specifying enable automatically enables local address learning on the port. disable Keyword that specifies that the AC bits be set based exclusively on whether the frame is forwarded to another port. This parameter is only valid when local address learning is enabled on a port. Therefore, specifying disable automatically enables local address learning on the port. sronly Keyword that specifies that the AC bits be set only on source-routed frames with a RIF length greater than 2 and on all explorer frames. never Keyword that specifies that the AC bits never be set on LLC frames. This parameter is only valid when local address learning is disabled on the port. Therefore, specifying never automatically disables local address learning on the port. always Keyword that specifies that the AC bits always be set on LLC frames. This parameter is only valid when local address learning is disabled on a port. Therefore, specifying always automatically disables local address learning on the port.
Defaults
The default configuration when local address learning is enabled on a Token Ring port, the default is disable. When local address learning is disabled on a Token Ring port, the default is always.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
You can use the set tokenring acbits command to specify whether the AC bits should be set unconditionally on repeated source-routed LLC frames, which include source-routed frames with a RIF length greater than two and all Spanning-Tree Explorer and All-Routes Explorer frames.
If you set this parameter to disable, the setting of these bits is based on whether the frame was actually forwarded.
Examples
This example shows port 4 on module 4 is enabled to set unconditionally the AC bits when forwarding certain LLC frames:
Console> (enable) set tokenring acbits 4/4 enable Port 4/4 acbits enabled. Console> (enable)
This example shows port 4 on module 4 is disabled to set conditionally the AC bits when forwarding certain LLC frames:
Console> (enable) set tokenring acbits 4/4 disable Port 4/4 acbits disabled. Console> (enable)
This example shows how to set the AC bits to always be set on LLC frames on port 2 on module 3:
Console> (enable) set tokenring acbits 3/2 always Warning: Disable Local learning: 3/2 Port 3/2 acbits always Console> (enable)
Related Commands
Use the set tokenring configloss command to specify thresholds that cause the port to be administratively disabled when exceeded during the user-specified interval.
set tokenring configloss mod_num/port_num [threshold thresh_num] [interval int_num]
Syntax Description
mod_num Number of the module. port_num Number of the port on the module. threshold (Optional) Keyword that specifies to set the threshold for configuration losses. thresh_num Valid values are 1 to 100; the default is 8. interval (Optional) Keyword that specifies to set the interval at which the configuration loss is measured. int_num Valid values are 1 to 99 minutes; the default is 10.
Defaults
The default threshold configuration is 8; the default interval is 10.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
Configuration loss occurs when a port completes a connection, allows data traffic to flow, and subsequently closes. The configuration loss threshold is used to control the number of configuration losses that can occur within a specified time. When the threshold is exceeded, the port is disabled and you must enable it by using the set port enable command or an SNMP manager.
Examples
The following example shows how to set a configuration loss threshold of 25 and an interval of 5 minutes for port 1 on module 4:
Console> (enable) set tokenring configloss 4/1 threshold 25 interval 5 Port 4/1 configloss threshold set to 25, interval set to 5. Console> (enable)
Related Commands
Use the set tokenring distrib-crf command to enable or disable distribution of TrCRF VLANs.
set tokenring distrib-crf {enable | disable}
Syntax Description
enable Keyword that specifies to enable distribution of TrCRF VLANs. disable Keyword that specifies to disable distribution of TrCRF VLANs.
Defaults
This command has no default settings.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
Examples
This example shows how to enable distribution of TrCRF VLANs:
Console> (enable) set tokenring distrib-crf enable
Distribution of TR CRFs enabled.
Warning: Ports will NOT be inactivated for distributed crfs. NETWORK LOOPS MAY .
Console> (enable)
This example shows how to disable distribution of TrCRF VLANs:
Console> (enable) set tokenring distrib-crf disable
Distribution of TR CRFs disabled.
Console> (enable)
Related Commands
Use the set tokenring etr command to enable or disable a Token Ring port's use of the early token release procedure when transmitting frames.
set tokenring etr mod_num/port_num {enable | disable}
Syntax Description
mod_num Number of the module. port_num Number of the port on the module. enable | disable Keyword that specifies that early token release should be used (enable) or not used (disable) when transmitting frames.
Defaults
For 16-Mbps and autospeed-detection ports, the default configuration is to enable early token release.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
You cannot enable early token release for 4-Mbps ports. Enabling or disabling early token release on a port causes the port to close and reopen.
Examples
This example shows how to enable early token release on port 2 on module 3:
Console> (enable) set tokenring etr 3/2 enable Port 3/2 Early Token Release enabled. Console> (enable)
This example shows how to disable early token release on port 2 on module 3:
Console> (enable) set tokenring etr 3/2 disable Port 3/2 Early Token Release disabled. Console> (enable)
Related Commands
Use the set tokenring explorer-throttle command to control the number of incoming explorer frames per second allowed on a Token Ring module port.
set tokenring explorer-throttle mod_num/port_num maximum_explorers
Syntax Description
mod_num Number of the module. port_num Number of the port on the module. maximum_explorers Maximum number of incoming explorer frames per second allowed on the specified Token Ring port.
Defaults
The default is 0, no explorer frame throttling.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
This command requires Token Ring module software release 3.2(3) or later.
To disable explorer frame throttling, set the maximum_explorers value to 0.
If the configured threshold is reached, any subsequent explorer frames received on the port are dropped until the next one-second window.
Use the set tokenring locallearning command to enable or disable local MAC address learning on a Token Ring port.
set tokenring locallearning mod_num/port_num enable | disable
Syntax Description
mod_num Number of the module. port_num Number of the port on the module. enable | disable Keyword that specifies whether local MAC address learning is enabled or disabled.
Defaults
The default is for local address learning to be enabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
We recommend that you use the set tokenring locallearning command only in those rare circumstances in which network communications are disrupted because of invalid frames. This command should be used in conjunction with the set tokenring portaging and set tokenring acbits commands.
The set tokenring locallearning command allows you to enable or disable local MAC address learning on a Token Ring port. The default is for local address learning to be enabled.
When local address learning is enabled, the value of the address recognized (A) bit and the frame copied (C) bit in LLC frames is set by the ports on the Token Ring module based on whether the frame was actually forwarded. However, when local address learning is disabled, the AC bits cannot be set by the ports on the Token Ring module based on whether the frame was forwarded because all frames are forwarded to the Catalyst 5000 series switching backplane.
Therefore, when local address learning is disabled on a Token Ring port, the AC bits must be set based on the type of frame that has been received. When you disable local address learning on a Token Ring port, the default is for the AC bits to always be set on LLC frames, however you can configure how the AC bits are to be set using the set tokenring acbits command.
Examples
This example shows how to disable local address learning:
Console> (enable) set tokenring locallearning 3/2 disable Warning: Resetting acbit value to ALWAYS: 3/2 Local learning disabled for port 3/2 Console> (enable)
Related Commands
Use the set tokenring portaging command to configure fast port aging on a Token Ring.
set tokenring portaging mod_num/port_num agingtime
Syntax Description
mod_num Number of the module. port_num Number of the port on the module. agingtime Time (in seconds) an inactive MAC address will remain in the port's address table. Possible values are 0 and 5—65535 seconds. Zero indicates the Token Ring module port address table entries are aged out using the CAM aging time for the corresponding VLAN that has been configured using the set cam agingtime command. To use the fast port aging feature effectively, we recommend that you configure an aging limit of 10.
Defaults
The default is 0 seconds.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
We recommend that you use the set tokenring portaging command only in those rare circumstances in which network communications are disrupted because of invalid frames. This command should be used in conjunction with the set tokenring locallearning and set tokenring acbits commands.
When in a network environment in which a device is sending invalid frames, you can ensure that the Token Ring module port address tables contain correct MAC address entries by rapidly aging out the erroneous entries using the set tokenring portaging command. Rapidly aging out the Token Ring module port address table ensures that the Token Ring module port address tables do not contain invalid entries which might affect the Catalyst 5000 Family switch and network communication.
The aging limit you define determines when inactive MAC addresses are removed from a port address table. The aging limit is the time (in seconds) a MAC address remains in the port's address table. Possible values are 0 and 5 through 65535 seconds. The default is 0. Zero indicates the Token Ring module port address table entries are aged out using the CAM aging time for the corresponding VLAN that has been configured using the set cam agingtime command. For more information about the set cam agingtime command, see the Command Reference for your switch.
To use the fast port aging feature effectively, we recommend that you configure an aging limit of 10.
Examples
This example shows how to define the address aging limits for Token Ring port on port 2 on module 3:
Console> (enable) set tokenring portaging 3/2 10 Agingtime set to 10 sec for port 3/2 Console> (enable)
Related Commands
Use the set tokenring portmode command to specify the connection type and access protocol used by a port.
set tokenring portmode mod_num/port_num {auto | fdxcport | hdxcport | fdxstation |
Syntax Description
mod_num Number of the module. port_num Number of the port on the module. auto Keyword that specifies to set the port to detect the connection mode. fdxcport Keyword that specifies to set the port to operate as a concentrator port in full-duplex mode. hdxcport Keyword that specifies to set the port to operate as a concentrator port in half-duplex mode. fdxstation Keyword that specifies to set the port to operate as a station in full-duplex mode. hdxstation Keyword that specifies to set the port to operate as a station in half-duplex mode. riro Keyword that specifies the parameter applicable to fiber-optic modules only.
Defaults
The default configuration has the port detect the mode of connection.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is supported by the Catalyst 5000 family switches.
Examples
This example shows how to set the port mode to autosensing on port 1 on module 4:
Console> (enable) set tokenring portmode 4/1 auto Port 4/1 mode set to auto. Console> (enable)
This example shows how to set port 2 on module 4 to operate as a concentrator port in full-duplex mode:
Console> (enable) set tokenring portmode 4/2 fdxcport Port 4/2 mode set to fdxcport. Console> (enable)
Related Commands
Posted: Tue Sep 19 14:39:43 PDT 2000
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