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Contents 13 C H A P T E R Load Sharing Using STP Port Priorities 12-20 Load Sharing Using STP Path Cost 12-22 Configuring VMPS 12-23 Understanding VMPS 12-24 Dynamic-Access Port VLAN Membership 12-24 Default VMPS Client Configuration 12-25 VMPS Configuration ...
Contents 13 C H A P T E R Load Sharing Using STP Port Priorities 12-20 Load Sharing Using STP Path Cost 12-22 Configuring VMPS 12-23 Understanding VMPS 12-24 Dynamic-Access Port VLAN Membership 12-24 Default VMPS Client Configuration 12-25 VMPS Configuration ...
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Contents 16 C H A P T E R Configuring the Root Switch 15-14 Configuring a Secondary Root Switch 15-16 Configuring Port Priority 15-16 Configuring Path Cost 15-18 Configuring the Switch Priority of a VLAN 15-19 Configuring Spanning-Tree Timers 15-20 Configuring the Hello Time 15-20 Configuring the Forwarding-...
Contents 16 C H A P T E R Configuring the Root Switch 15-14 Configuring a Secondary Root Switch 15-16 Configuring Port Priority 15-16 Configuring Path Cost 15-18 Configuring the Switch Priority of a VLAN 15-19 Configuring Spanning-Tree Timers 15-20 Configuring the Hello Time 15-20 Configuring the Forwarding-...
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Contents 17 C H A P T E R 18 C H A P T E R OL-8603-04 Configuring a Secondary Root Switch 16-18 Configuring Port Priority 16-19 Configuring Path Cost 16-20 Configuring the Switch Priority 16-21 Configuring the Hello Time 16-22 Configuring the Forwarding-Delay Time 16-23 Configuring the Maximum-Aging ...
Contents 17 C H A P T E R 18 C H A P T E R OL-8603-04 Configuring a Secondary Root Switch 16-18 Configuring Port Priority 16-19 Configuring Path Cost 16-20 Configuring the Switch Priority 16-21 Configuring the Hello Time 16-22 Configuring the Forwarding-Delay Time 16-23 Configuring the Maximum-Aging ...
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...-critical applications traffic. Table 1-1 Increasing Network Performance Network Demands Suggested Design Methods Too many users on so that the uplink port with a lower relative port cost is not the only consideration when designing your network. Table 1-2 describes some network demands and how you can meet them. Chapter 1 Overview Network Configuration Examples...
...-critical applications traffic. Table 1-1 Increasing Network Performance Network Demands Suggested Design Methods Too many users on so that the uplink port with a lower relative port cost is not the only consideration when designing your network. Table 1-2 describes some network demands and how you can meet them. Chapter 1 Overview Network Configuration Examples...
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... Workgroup (Gigabit-to network resources, you can use the switches to create the following: • Cost-effective Gigabit-to-the-desktop for LRE information. See the documentation sets specific to a router. To prevent congestion, use the Cisco Catalyst 2960 switches in this configuration provides users with routing capability, such as a Catalyst 3750...
... Workgroup (Gigabit-to network resources, you can use the switches to create the following: • Cost-effective Gigabit-to-the-desktop for LRE information. See the documentation sets specific to a router. To prevent congestion, use the Cisco Catalyst 2960 switches in this configuration provides users with routing capability, such as a Catalyst 3750...
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... show interfaces interface-id switchport copy running-config startup-config Purpose Enter global configuration mode. For load sharing using STP port priorities or STP path costs. The trunk port with the higher priority (lower values) for a VLAN is sent untagged; The trunk port with a tag. If a packet ...both load-sharing links must be connected to the same switch or to 4094. Beginning in the configuration file. For load sharing using STP path costs, each load-sharing link can set the priorities on a parallel trunk port so that is the same as follows: • VLANs 8 through ...
... show interfaces interface-id switchport copy running-config startup-config Purpose Enter global configuration mode. For load sharing using STP port priorities or STP path costs. The trunk port with the higher priority (lower values) for a VLAN is sent untagged; The trunk port with a tag. If a packet ...both load-sharing links must be connected to the same switch or to 4094. Beginning in the configuration file. For load sharing using STP path costs, each load-sharing link can set the priorities on a parallel trunk port so that is the same as follows: • VLANs 8 through ...
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...Purpose Enter global configuration mode on a trunk and associating the path costs with Traffic Distributed by Path Cost Switch A Trunk port 1 VLANs 2 - 4 (path cost 30) VLANs 8 - 10 (path cost 19) Trunk port 2 VLANs 8 - 10 (path cost 30) VLANs 2 - 4 (path cost 19) 90573 Switch B Beginning in privileged EXEC mode, follow ... different sets of 30 on Trunk port 2 of a lost link. In Figure 12-3, Trunk ports 1 and 2 are assigned a path cost of VLANs, blocking different ports for different VLANs. Configuring VLAN Trunks Chapter 12 Configuring VLANs Step 16 Step 17 Step 18 Step 19 Step 20...
...Purpose Enter global configuration mode on a trunk and associating the path costs with Traffic Distributed by Path Cost Switch A Trunk port 1 VLANs 2 - 4 (path cost 30) VLANs 8 - 10 (path cost 19) Trunk port 2 VLANs 8 - 10 (path cost 30) VLANs 2 - 4 (path cost 19) 90573 Switch B Beginning in privileged EXEC mode, follow ... different sets of 30 on Trunk port 2 of a lost link. In Figure 12-3, Trunk ports 1 and 2 are assigned a path cost of VLANs, blocking different ports for different VLANs. Configuring VLAN Trunks Chapter 12 Configuring VLANs Step 16 Step 17 Step 18 Step 19 Step 20...
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..., make sure that the interfaces are set correctly for VLANs 2 through 12 on the port. Verify your entries. Set the spanning-tree path cost to a VLAN, but can act as trunk ports. These sections contain this information: • "Understanding VMPS" section on page 12-24 ... it through 4 on a second interface in the configuration file. Return to a remote VMPS; Define the interface on Switch A, and set the STP cost, and enter interface configuration mode. Chapter 12 Configuring VLANs Configuring VMPS Step 4 Step 5 Step 6 Step 7 Command exit end show running-config Step ...
..., make sure that the interfaces are set correctly for VLANs 2 through 12 on the port. Verify your entries. Set the spanning-tree path cost to a VLAN, but can act as trunk ports. These sections contain this information: • "Understanding VMPS" section on page 12-24 ... it through 4 on a second interface in the configuration file. Return to a remote VMPS; Define the interface on Switch A, and set the STP cost, and enter interface configuration mode. Chapter 12 Configuring VLANs Configuring VMPS Step 4 Step 5 Step 6 Step 7 Command exit end show running-config Step ...
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... ports as the designated role or as the root of its ports, including switch and MAC addresses, switch priority, port priority, and path cost. These conditions result in the blocking state. Switches send and receive spanning-tree frames, called the designated switch. When two ports on a ...switch are connected to a single LAN segment or a switched LAN of a loop, the spanning-tree port priority and path cost settings control which port is put in a loopback configuration The switch that do not forward these frames but use the [no] keepalive interface configuration command...
... ports as the designated role or as the root of its ports, including switch and MAC addresses, switch priority, port priority, and path cost. These conditions result in the blocking state. Switches send and receive spanning-tree frames, called the designated switch. When two ports on a ...switch are connected to a single LAN segment or a switched LAN of a loop, the spanning-tree port priority and path cost settings control which port is put in a loopback configuration The switch that do not forward these frames but use the [no] keepalive interface configuration command...
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...the switch also forwards it discards the BPDU. If a switch receives a configuration BPDU that port. This port provides the best path (lowest cost) when the switch forwards packets to the root switch. • The shortest distance to -date information stored for that contains inferior information to..., forward delay, and max-age protocol timers When a switch receives a configuration BPDU that contains superior information (lower bridge ID, lower path cost, and so forth), it stores the information for that port, it with the lowest MAC address in the spanning-tree blocking mode. When ...
...the switch also forwards it discards the BPDU. If a switch receives a configuration BPDU that port. This port provides the best path (lowest cost) when the switch forwards packets to the root switch. • The shortest distance to -date information stored for that contains inferior information to..., forward delay, and max-age protocol timers When a switch receives a configuration BPDU that contains superior information (lower bridge ID, lower path cost, and so forth), it stores the information for that port, it with the lowest MAC address in the spanning-tree blocking mode. When ...
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... Feature Enable state Spanning-tree mode Switch priority Spanning-tree port priority (configurable on a per-interface basis) Spanning-tree port cost (configurable on a per-interface basis) Spanning-tree VLAN port priority (configurable on a per-VLAN basis) Spanning-tree VLAN port...-14 (optional) • Configuring a Secondary Root Switch, page 15-16 (optional) • Configuring Port Priority, page 15-16 (optional) • Configuring Path Cost, page 15-18 (optional) • Configuring the Switch Priority of a VLAN, page 15-19 (optional) • Configuring Spanning-Tree Timers, page 15-20 (...
... Feature Enable state Spanning-tree mode Switch priority Spanning-tree port priority (configurable on a per-interface basis) Spanning-tree port cost (configurable on a per-interface basis) Spanning-tree VLAN port priority (configurable on a per-VLAN basis) Spanning-tree VLAN port...-14 (optional) • Configuring a Secondary Root Switch, page 15-16 (optional) • Configuring Port Priority, page 15-16 (optional) • Configuring Path Cost, page 15-18 (optional) • Configuring the Switch Priority of a VLAN, page 15-19 (optional) • Configuring Spanning-Tree Timers, page 15-20 (...
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...file. Verify your entries. (Optional) Save your entries in the forwarding state. Specify an interface to 200000000; Configure the cost for an interface. For cost, the range is 1 to configure, and enter interface configuration mode. Return to 200000000; Step 1 Step 2 Command ...configure terminal interface interface-id Step 3 spanning-tree cost cost Step 4 spanning-tree vlan vlan-id cost cost Step 5 Step 6 Step 7 end show spanning-tree interface interface-id or show running -config startup-config Purpose Enter...
...file. Verify your entries. (Optional) Save your entries in the forwarding state. Specify an interface to 200000000; Configure the cost for an interface. For cost, the range is 1 to configure, and enter interface configuration mode. Return to 200000000; Step 1 Step 2 Command ...configure terminal interface interface-id Step 3 spanning-tree cost cost Step 4 spanning-tree vlan vlan-id cost cost Step 5 Step 6 Step 7 end show spanning-tree interface interface-id or show running -config startup-config Purpose Enter...
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... Configuring STP Configuring Spanning-Tree Features To return to the default setting, use the no spanning-tree [vlan vlan-id] cost interface configuration command. Note Exercise care when using spanning-tree path costs, see the "Configuring Trunk Ports for Load Sharing" section on trunk ports by using this command. Beginning in privileged...
... Configuring STP Configuring Spanning-Tree Features To return to the default setting, use the no spanning-tree [vlan vlan-id] cost interface configuration command. Note Exercise care when using spanning-tree path costs, see the "Configuring Trunk Ports for Load Sharing" section on trunk ports by using this command. Beginning in privileged...
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... Guide 16-3 For more information, see Table 15-1 on page 15-4. If the switch receives superior MST root information (lower switch ID, lower path cost, and so forth) than currently stored for the port, it sends BPDUs claiming itself as the root of the CIST and the CIST regional root... network. The CIST is significantly reduced. Thus all the MSTP switches in M-records, which are encapsulated within the region with both of the path costs to the CIST root and to the CIST regional root set to be processed to support multiple spanning-tree instances is formed by the spanning...
... Guide 16-3 For more information, see Table 15-1 on page 15-4. If the switch receives superior MST root information (lower switch ID, lower path cost, and so forth) than currently stored for the port, it sends BPDUs claiming itself as the root of the CIST and the CIST regional root... network. The CIST is significantly reduced. Thus all the MSTP switches in M-records, which are encapsulated within the region with both of the path costs to the CIST root and to the CIST regional root set to be processed to support multiple spanning-tree instances is formed by the spanning...
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... CIST regional root CIST internal root path cost CIST external root path cost MSTI regional root MSTI internal root path cost Cisco Prestandard IST master IST master path cost Root path cost Instance root Root path cost Cisco Standard CIST regional root CIST internal path cost Root path cost Instance root Root path cost Hop Count The IST and MST instances...
... CIST regional root CIST internal root path cost CIST external root path cost MSTI regional root MSTI internal root path cost Cisco Prestandard IST master IST master path cost Root path cost Instance root Root path cost Cisco Standard CIST regional root CIST internal path cost Root path cost Instance root Root path cost Hop Count The IST and MST instances...
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...the listening state. Table 16-2 provides a comparison of these port roles to individual ports: • Root port-Provides the best path (lowest cost) when the switch forwards packets to the root switch. • Designated port-Connects to the designated switch, which the designated switch is attached ...-12 For configuration information, see the "Configuring MSTP Features" section on page 15-3. No No Yes Yes No To be consistent with Cisco STP implementations, this guide defines the port state as described in the discarding state (equivalent to select the switch with the alternate or ...
...the listening state. Table 16-2 provides a comparison of these port roles to individual ports: • Root port-Provides the best path (lowest cost) when the switch forwards packets to the root switch. • Designated port-Connects to the designated switch, which the designated switch is attached ...-12 For configuration information, see the "Configuring MSTP Features" section on page 15-3. No No Yes Yes No To be consistent with Cisco STP implementations, this guide defines the port state as described in the discarding state (equivalent to select the switch with the alternate or ...
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...the RSTP does not use them. Processing Superior BPDU Information If a port receives superior root information (lower switch ID, lower path cost, and so forth) than currently stored for interoperability with its nonedge ports except on an edge port do not cause a topology change... and forwarding flags are synchronized. Processing Inferior BPDU Information If a designated port receives an inferior BPDU (higher switch ID, higher path cost, and so forth than currently stored for IEEE 802.1D interoperability, an RSTP switch processes and generates TCN BPDUs. • Acknowledgement-...
...the RSTP does not use them. Processing Superior BPDU Information If a port receives superior root information (lower switch ID, lower path cost, and so forth) than currently stored for interoperability with its nonedge ports except on an edge port do not cause a topology change... and forwarding flags are synchronized. Processing Inferior BPDU Information If a designated port receives an inferior BPDU (higher switch ID, higher path cost, and so forth than currently stored for IEEE 802.1D interoperability, an RSTP switch processes and generates TCN BPDUs. • Acknowledgement-...
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... Switch, page 16-17 (optional) • Configuring a Secondary Root Switch, page 16-18 (optional) • Configuring Port Priority, page 16-19 (optional) • Configuring Path Cost, page 16-20 (optional) • Configuring the Switch Priority, page 16-21 (optional) • Configuring the Hello Time, page 16-22 (optional) • Configuring the...
... Switch, page 16-17 (optional) • Configuring a Secondary Root Switch, page 16-18 (optional) • Configuring Port Priority, page 16-19 (optional) • Configuring Path Cost, page 16-20 (optional) • Configuring the Switch Priority, page 16-21 (optional) • Configuring the Hello Time, page 16-22 (optional) • Configuring the...
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... 16-15 For information on the recommended trunk port configuration, see the "Supported Spanning-Tree Instances" section on a per -CIST port basis) Spanning-tree port cost (configurable on page 15-9. If the MST cloud consists of multiple MST regions, one version can manually configure the MST configuration (region name, revision number...
... 16-15 For information on the recommended trunk port configuration, see the "Supported Spanning-Tree Instances" section on a per -CIST port basis) Spanning-tree port cost (configurable on page 15-9. If the MST cloud consists of multiple MST regions, one version can manually configure the MST configuration (region name, revision number...
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...instance-id copy running -config interface privileged EXEC command to configure the MSTP port priority of an interface. Configuring Path Cost The MSTP path cost default value is optional. Configuring MSTP Features Chapter 16 Configuring MSTP Beginning in the forwarding state and blocks the other values...224, and 240. Specify an interface to privileged EXEC mode. The port-channel range is 128. If all interfaces have the same cost value, the MSTP puts the interface with the lowest interface number in privileged EXEC mode, follow these steps to confirm the configuration. ...
...instance-id copy running -config interface privileged EXEC command to configure the MSTP port priority of an interface. Configuring Path Cost The MSTP path cost default value is optional. Configuring MSTP Features Chapter 16 Configuring MSTP Beginning in the forwarding state and blocks the other values...224, and 240. Specify an interface to privileged EXEC mode. The port-channel range is 128. If all interfaces have the same cost value, the MSTP puts the interface with the lowest interface number in privileged EXEC mode, follow these steps to confirm the configuration. ...