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... rapid convergence of the software IP base and IP services images) • On the Catalyst 3750G Integrated Wireless LAN Controller Switch only, an integrated Catalyst 3750 switch and Cisco 4400 series wireless LAN controller that supports up to five simultaneous, encrypted Secure Shell (SSH) connections for multiple CLI-based...stack • UniDirectional Link Detection (UDLD) and aggressive UDLD for detecting and disabling unidirectional links on fiber-optic interfaces caused by incorrect fiber-optic wiring or port faults • IEEE 802.1D Spanning Tree Protocol (STP) for redundant ...
... rapid convergence of the software IP base and IP services images) • On the Catalyst 3750G Integrated Wireless LAN Controller Switch only, an integrated Catalyst 3750 switch and Cisco 4400 series wireless LAN controller that supports up to five simultaneous, encrypted Secure Shell (SSH) connections for multiple CLI-based...stack • UniDirectional Link Detection (UDLD) and aggressive UDLD for detecting and disabling unidirectional links on fiber-optic interfaces caused by incorrect fiber-optic wiring or port faults • IEEE 802.1D Spanning Tree Protocol (STP) for redundant ...
Configuration Guide
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..., connect the switches in the access layer to a Gigabit multilayer switch in the switch stack to a Gigabit server through fiber-optic connections. 1-18 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 Network Configuration Examples Chapter 1 Overview You can have redundant uplink connections, using...Gigabit Ethernet to network resources, you can also create backup paths by using SFP modules in the backbone, such as a Catalyst 4500 or Catalyst 3750-12S Gigabit switch. If one of the redundant connections fails, the other can use QoS DSCP marking priorities on these...
..., connect the switches in the access layer to a Gigabit multilayer switch in the switch stack to a Gigabit server through fiber-optic connections. 1-18 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 Network Configuration Examples Chapter 1 Overview You can have redundant uplink connections, using...Gigabit Ethernet to network resources, you can also create backup paths by using SFP modules in the backbone, such as a Catalyst 4500 or Catalyst 3750-12S Gigabit switch. If one of the redundant connections fails, the other can use QoS DSCP marking priorities on these...
Configuration Guide
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... dual switch stacks, which have redundant Gigabit EtherChannels and cross-stack EtherChannels. Server Aggregation Campus core Catalyst 6500 switches Si Si Si Si Si Si Catalyst 4500 multilayer switches Catalyst 3750 StackWise switch stacks Server racks 86931 1-20 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 Network Configuration Examples Chapter 1 Overview Figure 1-4 Fault...
... dual switch stacks, which have redundant Gigabit EtherChannels and cross-stack EtherChannels. Server Aggregation Campus core Catalyst 6500 switches Si Si Si Si Si Si Catalyst 4500 multilayer switches Catalyst 3750 StackWise switch stacks Server racks 86931 1-20 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 Network Configuration Examples Chapter 1 Overview Figure 1-4 Fault...
Configuration Guide
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... OADM modules on the same fiber-optic cable. For more information about the CWDM SFP modules and CWDM OADM modules, see the Cisco CWDM GBIC and CWDM SFP Installation Note. 1-26 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 The Catalyst 3750 switches have coarse wavelength...-division multiplexing (CWDM) fiber-optic SFP modules installed. The CWDM SFP modules ...
... OADM modules on the same fiber-optic cable. For more information about the CWDM SFP modules and CWDM OADM modules, see the Cisco CWDM GBIC and CWDM SFP Installation Note. 1-26 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 The Catalyst 3750 switches have coarse wavelength...-division multiplexing (CWDM) fiber-optic SFP modules installed. The CWDM SFP modules ...
Configuration Guide
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...for most of these commands are written to a VLAN, page 13-11 OL-8550-02 Catalyst 3750 Switch Software Configuration Guide 13-5 For complete information on the commands and parameters that control VLAN configuration, see Chapter 14, "Configuring VTP." You can set these parameters when you ...configuration, use the commands described in these sections and in the VLAN database: • VLAN ID • VLAN name • VLAN type (Ethernet, Fiber Distributed Data Interface [FDDI], FDDI network entity title [NET], TrBRF, or TrCRF, Token Ring, Token Ring-Net) • VLAN state (active or...
...for most of these commands are written to a VLAN, page 13-11 OL-8550-02 Catalyst 3750 Switch Software Configuration Guide 13-5 For complete information on the commands and parameters that control VLAN configuration, see Chapter 14, "Configuring VTP." You can set these parameters when you ...configuration, use the commands described in these sections and in the VLAN database: • VLAN ID • VLAN name • VLAN type (Ethernet, Fiber Distributed Data Interface [FDDI], FDDI network entity title [NET], TrBRF, or TrCRF, Token Ring, Token Ring-Net) • VLAN state (active or...
Configuration Guide
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... exists. In normal mode, UDLD can also detect unidirectional links due to one-way traffic on fiber-optic and twisted-pair links and to misconnected ports on the Catalyst 3750 switch. In normal and aggressive modes, UDLD works with the Layer 1 mechanisms to learn ...of operation: normal (the default) and aggressive. OL-8550-02 Catalyst 3750 Switch Software Configuration Guide 27-1 Configuring UDLD 27 C H A P T E R This chapter describes how to configure the UniDirectional Link Detection (UDLD) protocol on fiber-optic links. All connected devices must support UDLD for this chapter,...
... exists. In normal mode, UDLD can also detect unidirectional links due to one-way traffic on fiber-optic and twisted-pair links and to misconnected ports on the Catalyst 3750 switch. In normal and aggressive modes, UDLD works with the Layer 1 mechanisms to learn ...of operation: normal (the default) and aggressive. OL-8550-02 Catalyst 3750 Switch Software Configuration Guide 27-1 Configuring UDLD 27 C H A P T E R This chapter describes how to configure the UniDirectional Link Detection (UDLD) protocol on fiber-optic links. All connected devices must support UDLD for this chapter,...
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...previous detection methods. When UDLD is in normal mode, if one message to inform the neighbors to keep the caches synchronized. 27-2 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 Conversely, the loss of the heart beat means that the link must be considered as a... beat whose presence guarantees the health of their caches affected by the configuration change . In normal mode, UDLD detects a unidirectional link when fiber strands in aggressive mode can be shut down while the other UDLD-capable neighbors by the local device. When the switch receives a hello ...
...previous detection methods. When UDLD is in normal mode, if one message to inform the neighbors to keep the caches synchronized. 27-2 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 Conversely, the loss of the heart beat means that the link must be considered as a... beat whose presence guarantees the health of their caches affected by the configuration change . In normal mode, UDLD detects a unidirectional link when fiber strands in aggressive mode can be shut down while the other UDLD-capable neighbors by the local device. When the switch receives a hello ...
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...; Configuration Guidelines, page 27-4 • Enabling UDLD Globally, page 27-5 • Enabling UDLD on both sides of the link. 27-4 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 Table 27-1 Default UDLD Configuration Feature UDLD global enable state UDLD per-port enable state for...UDLD per-port enable state for twisted-pair (copper) media UDLD aggressive mode Default Setting Globally disabled Disabled on all Ethernet fiber-optic ports Disabled on all Ethernet 10/100 and 1000BASE-TX ports Disabled Configuration Guidelines These are the UDLD configuration guidelines: ...
...; Configuration Guidelines, page 27-4 • Enabling UDLD Globally, page 27-5 • Enabling UDLD on both sides of the link. 27-4 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 Table 27-1 Default UDLD Configuration Feature UDLD global enable state UDLD per-port enable state for...UDLD per-port enable state for twisted-pair (copper) media UDLD aggressive mode Default Setting Globally disabled Disabled on all Ethernet fiber-optic ports Disabled on all Ethernet 10/100 and 1000BASE-TX ports Disabled Configuration Guidelines These are the UDLD configuration guidelines: ...
Configuration Guide
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... stack. To disable UDLD globally, use the no udld aggressive global configuration command to disable aggressive mode UDLD on all fiber-optic ports. OL-8550-02 Catalyst 3750 Switch Software Configuration Guide 27-5 An individual interface configuration overrides the setting of operation: message-timer-interval} •...EXEC mode, follow these steps to enable UDLD in the aggressive or normal mode and to set the configurable message timer on all fiber-optic ports on the switch and all members in the configuration file. The range is from 1 to privileged EXEC mode. Use ...
... stack. To disable UDLD globally, use the no udld aggressive global configuration command to disable aggressive mode UDLD on all fiber-optic ports. OL-8550-02 Catalyst 3750 Switch Software Configuration Guide 27-5 An individual interface configuration overrides the setting of operation: message-timer-interval} •...EXEC mode, follow these steps to enable UDLD in the aggressive or normal mode and to set the configurable message timer on all fiber-optic ports on the switch and all members in the configuration file. The range is from 1 to privileged EXEC mode. Use ...
Configuration Guide
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...; udld port-Enables UDLD in normal mode on the specified port. • udld port aggressive-Enables UDLD in aggressive mode on a specified fiber-optic port. Note Use the no udld port interface configuration command followed by default. Return to be enabled for UDLD, and enter interface configuration...8226; The errdisable recovery cause udld global configuration command enables the timer to automatically recover from the UDLD error-disabled state. 27-6 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 You can also bring up the port by using these steps to recover from the ...
...; udld port-Enables UDLD in normal mode on the specified port. • udld port aggressive-Enables UDLD in aggressive mode on a specified fiber-optic port. Note Use the no udld port interface configuration command followed by default. Return to be enabled for UDLD, and enter interface configuration...8226; The errdisable recovery cause udld global configuration command enables the timer to automatically recover from the UDLD error-disabled state. 27-6 Catalyst 3750 Switch Software Configuration Guide OL-8550-02 You can also bring up the port by using these steps to recover from the ...
Configuration Guide
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...42-2 unsupported protocols 42-4 VLAN-bridge STP 18-11 Fast Uplink Transition Protocol 20-6 features, incompatible 25-11 FIB 35-75 fiber-optic, detecting unidirectional links 27-1 files basic crashinfo description 43-24 location 43-24 copying C-5 crashinfo description 43-24 deleting ...C-5 displaying the contents of C-8 IN-16 Catalyst 3750 Switch Software Configuration Guide files (continued) extended crashinfo description 43-24 location 43-25 tar creating C-6 displaying the contents of C-7...
...42-2 unsupported protocols 42-4 VLAN-bridge STP 18-11 Fast Uplink Transition Protocol 20-6 features, incompatible 25-11 FIB 35-75 fiber-optic, detecting unidirectional links 27-1 files basic crashinfo description 43-24 location 43-24 copying C-5 crashinfo description 43-24 deleting ...C-5 displaying the contents of C-8 IN-16 Catalyst 3750 Switch Software Configuration Guide files (continued) extended crashinfo description 43-24 location 43-25 tar creating C-6 displaying the contents of C-7...
Configuration Guide
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... within a QoS domain 33-36 trustpoints, CA 9-42 tunneling defined 17-1 IEEE 802.1Q 17-1 Layer 2 protocol 17-8 IN-50 Catalyst 3750 Switch Software Configuration Guide tunnel ports defined 13-4 described 11-4, 17-1 IEEE 802.1Q, configuring 17-6 incompatibilities with other features 17..., detecting unidirectional links 27-1 type of service See ToS U UDLD configuration guidelines 27-4 default configuration 27-4 disabling globally 27-5 on fiber-optic interfaces 27-5 per interface 27-6 echoing detection mechanism 27-3 enabling globally 27-5 per interface 27-6 Layer 2 protocol tunneling 17-10...
... within a QoS domain 33-36 trustpoints, CA 9-42 tunneling defined 17-1 IEEE 802.1Q 17-1 Layer 2 protocol 17-8 IN-50 Catalyst 3750 Switch Software Configuration Guide tunnel ports defined 13-4 described 11-4, 17-1 IEEE 802.1Q, configuring 17-6 incompatibilities with other features 17..., detecting unidirectional links 27-1 type of service See ToS U UDLD configuration guidelines 27-4 default configuration 27-4 disabling globally 27-5 on fiber-optic interfaces 27-5 per interface 27-6 echoing detection mechanism 27-3 enabling globally 27-5 per interface 27-6 Layer 2 protocol tunneling 17-10...