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...providing 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 become unavailable (failover support) The newly elected stack master begins accepting Layer 2 traffic... • 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...
...providing 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 become unavailable (failover support) The newly elected stack master begins accepting Layer 2 traffic... • 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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...uplink connections, using Fast Ethernet, Gigabit, or EtherChannel links. Figure 1-1 Cost-Effective Wiring Closet Gigabit server Catalyst Gigabit Ethernet multilayer switch Si Catalyst 3750 Layer 2 StackWise switch stack 86927 • High-performance wiring closet (Figure 1-2)-For high-speed access ...cluster-capable, you can serve as a Catalyst 4500 Gigabit switch or Catalyst 6500 Gigabit switch. Using SFP modules also provides flexibility in the access layer to manage them through fiber-optic connections. 1-18 Catalyst 3750 Switch Software Configuration Guide OL-8550...
...uplink connections, using Fast Ethernet, Gigabit, or EtherChannel links. Figure 1-1 Cost-Effective Wiring Closet Gigabit server Catalyst Gigabit Ethernet multilayer switch Si Catalyst 3750 Layer 2 StackWise switch stack 86927 • High-performance wiring closet (Figure 1-2)-For high-speed access ...cluster-capable, you can serve as a Catalyst 4500 Gigabit switch or Catalyst 6500 Gigabit switch. Using SFP modules also provides flexibility in the access layer to manage them through fiber-optic connections. 1-18 Catalyst 3750 Switch Software Configuration Guide OL-8550...
Configuration Guide
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...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 Using SFP ... core. Network Configuration Examples Chapter 1 Overview Figure 1-4 Fault tolerance from the server racks to the core is achieved through fiber-optic connections. Using dual SFP module uplinks from 0.5 meter to 3 meters provide extended connections to the switch stacks across multiple...
...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 Using SFP ... core. Network Configuration Examples Chapter 1 Overview Figure 1-4 Fault tolerance from the server racks to the core is achieved through fiber-optic connections. Using dual SFP module uplinks from 0.5 meter to 3 meters provide extended connections to the switch stacks across multiple...
Configuration Guide
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...the receiving end separate (or demultiplex) the different wavelengths. The higher the wavelength, the farther the transmission can travel simultaneously on the same fiber-optic cable. The CWDM OADM modules on the CWDM SFP module, data is 1550 nm. 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 CWDM SFP modules connect to CWDM optical add/drop multiplexer (OADM...
...the receiving end separate (or demultiplex) the different wavelengths. The higher the wavelength, the farther the transmission can travel simultaneously on the same fiber-optic cable. The CWDM OADM modules on the CWDM SFP module, data is 1550 nm. 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 CWDM SFP modules connect to CWDM optical add/drop multiplexer (OADM...
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For complete information on the commands and parameters that control VLAN configuration, see Chapter 14, "Configuring VTP." These sections contain... the commands described in these parameters when you attempt to a VLAN, page 13-11 OL-8550-02 Catalyst 3750 Switch Software Configuration Guide 13-5 You can set 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) ...
For complete information on the commands and parameters that control VLAN configuration, see Chapter 14, "Configuring VTP." These sections contain... the commands described in these parameters when you attempt to a VLAN, page 13-11 OL-8550-02 Catalyst 3750 Switch Software Configuration Guide 13-5 You can set 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) ...
Configuration Guide
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... down misconnected ports. Unidirectional links 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. This chapter consists of these sections: • Understanding UDLD, page 27-1 ... Unless otherwise noted, the term switch refers to a standalone switch and to configure the UniDirectional Link Detection (UDLD) protocol on fiber-optic connections. Modes of Operation UDLD supports two modes of physical signaling and fault detection. At Layer 1, autonegotiation takes care of...
... down misconnected ports. Unidirectional links 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. This chapter consists of these sections: • Understanding UDLD, page 27-1 ... Unless otherwise noted, the term switch refers to a standalone switch and to configure the UniDirectional Link Detection (UDLD) protocol on fiber-optic connections. Modes of Operation UDLD supports two modes of physical signaling and fault detection. At Layer 1, autonegotiation takes care of...
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... detection methods. This check cannot be considered as a heart beat whose presence guarantees the health of their caches affected by the status change . UDLD in a fiber-optic port are misconnected and the Layer 1 mechanisms do not detect this condition, does not do so. Understanding UDLD Chapter 27 Configuring UDLD A unidirectional link... occurs whenever traffic sent by a local device is received by its neighbors. Methods to keep the caches synchronized. 27-2 Catalyst 3750 Switch Software Configuration Guide OL-8550-02
... detection methods. This check cannot be considered as a heart beat whose presence guarantees the health of their caches affected by the status change . UDLD in a fiber-optic port are misconnected and the Layer 1 mechanisms do not detect this condition, does not do so. Understanding UDLD Chapter 27 Configuring UDLD A unidirectional link... occurs whenever traffic sent by a local device is received by its neighbors. Methods to keep the caches synchronized. 27-2 Catalyst 3750 Switch Software Configuration Guide OL-8550-02
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...Table 27-1 Default UDLD Configuration Feature UDLD global enable state UDLD per-port enable state for fiber-optic media 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 ... link if it is connected to a UDLD-incapable port 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 fiber-optic media 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 ... link if it is connected to a UDLD-incapable port of the link. 27-4 Catalyst 3750 Switch Software Configuration Guide OL-8550-02
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... Enter global configuration mode. 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 Chapter 27 Configuring UDLD Configuring UDLD Enabling UDLD Globally Beginning in privileged EXEC mode, follow these...
... Enter global configuration mode. 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 Chapter 27 Configuring UDLD Configuring UDLD Enabling UDLD Globally Beginning in privileged EXEC mode, follow these...
Configuration Guide
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... 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 Note Use the no udld port interface configuration command followed by the udld {aggressive...UDLD error-disabled state, and the errdisable recovery interval interval global configuration command specifies the time to disable UDLD on a specified fiber-optic port. Specify the port to privileged EXEC mode. Resetting an Interface Disabled by UDLD Beginning in privileged EXEC mode, ...
... 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 Note Use the no udld port interface configuration command followed by the udld {aggressive...UDLD error-disabled state, and the errdisable recovery interval interval global configuration command specifies the time to disable UDLD on a specified fiber-optic port. Specify the port to privileged EXEC mode. Resetting an Interface Disabled by UDLD Beginning in privileged EXEC mode, ...
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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...