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... a Trunk 8-23 Changing the Pruning-Eligible List 8-23 Configuring the Native VLAN for Untagged Traffic 8-24 Load Sharing Using STP 8-24 Load Sharing Using STP Port Priorities 8-25 Configuring STP Port Priorities and Load Sharing 8-25 Load Sharing Using STP Path Cost 8-27 How the VMPS Works 8-28 Catalyst 2950 Desktop Switch Software Configuration Guide ix
... a Trunk 8-23 Changing the Pruning-Eligible List 8-23 Configuring the Native VLAN for Untagged Traffic 8-24 Load Sharing Using STP 8-24 Load Sharing Using STP Port Priorities 8-25 Configuring STP Port Priorities and Load Sharing 8-25 Load Sharing Using STP Path Cost 8-27 How the VMPS Works 8-28 Catalyst 2950 Desktop Switch Software Configuration Guide ix
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...Root Guard 9-19 Configuring Basic STP Features 9-20 Default STP Configuration 9-20 Disabling STP 9-21 Configuring the Root Switch 9-21 Configuring a Secondary Root Switch 9-23 Configuring STP Port Priority 9-24 Configuring STP Path Cost 9-25 Configuring the Switch Priority of a VLAN 9-26 Configuring the Hello Time 9-27 Configuring the Forwarding-Delay Time for a VLAN 9-27... Ports 10-5 Enabling Port Security 10-6 Defining the Maximum Secure Address Count 10-7 Enabling Port Security 10-7 Disabling Port Security 10-8 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide xi
...Root Guard 9-19 Configuring Basic STP Features 9-20 Default STP Configuration 9-20 Disabling STP 9-21 Configuring the Root Switch 9-21 Configuring a Secondary Root Switch 9-23 Configuring STP Port Priority 9-24 Configuring STP Path Cost 9-25 Configuring the Switch Priority of a VLAN 9-26 Configuring the Hello Time 9-27 Configuring the Forwarding-Delay Time for a VLAN 9-27... Ports 10-5 Enabling Port Security 10-6 Defining the Maximum Secure Address Count 10-7 Enabling Port Security 10-7 Disabling Port Security 10-8 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide xi
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...-clock access to register: http://www.cisco.com/register/ xxii Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 Inquiries to the technical support resources on the Cisco TAC Web Site. Cisco.com is based on Cisco.com to resolve P3 and P4 issues yourself, saving both cost and time. Which Cisco TAC resource you choose is a highly...
...-clock access to register: http://www.cisco.com/register/ xxii Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 Inquiries to the technical support resources on the Cisco TAC Web Site. Cisco.com is based on Cisco.com to resolve P3 and P4 issues yourself, saving both cost and time. Which Cisco TAC resource you choose is a highly...
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...that can configure your network to increase the bandwidth available to degrade and how you can support applications such as e-mail with a lower relative port cost is not the only consideration when designing your network users compete for traffic-load balancing on a single network segment and a growing number of users ...UplinkFast, and BackboneFast for network bandwidth, it takes longer to create dedicated network segments and interconnecting the segments through Fast Ethernet and Gigabit Ethernet connections. Catalyst 2950 Desktop Switch Software Configuration Guide 1-8 78-11380-03
...that can configure your network to increase the bandwidth available to degrade and how you can support applications such as e-mail with a lower relative port cost is not the only consideration when designing your network users compete for traffic-load balancing on a single network segment and a growing number of users ...UplinkFast, and BackboneFast for network bandwidth, it takes longer to create dedicated network segments and interconnecting the segments through Fast Ethernet and Gigabit Ethernet connections. Catalyst 2950 Desktop Switch Software Configuration Guide 1-8 78-11380-03
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... required Cisco proprietary signaling and cabling, the GigaStack GBIC-to-GigaStack GBIC connection cannot exceed 3 feet (1 meter). • Redundant Gigabit backbone-Using HSRP, you can create backup paths between the switches and network resources. 78-11380-03 Catalyst 2950 Desktop Switch Software ....1P/Q. Figure 1-1 shows configuration examples of using the Catalyst switches to create these networks: • Cost-effective wiring closet-A cost-effective way to connect many users to two backbone switches. To preserve switch connectivity if one of the redundant connections fails, the ...
... required Cisco proprietary signaling and cabling, the GigaStack GBIC-to-GigaStack GBIC connection cannot exceed 3 feet (1 meter). • Redundant Gigabit backbone-Using HSRP, you can create backup paths between the switches and network resources. 78-11380-03 Catalyst 2950 Desktop Switch Software ....1P/Q. Figure 1-1 shows configuration examples of using the Catalyst switches to create these networks: • Cost-effective wiring closet-A cost-effective way to connect many users to two backbone switches. To preserve switch connectivity if one of the redundant connections fails, the ...
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... Examples Figure 1-1 Example Configurations Catalyst 2950 switch Chapter 1 Overview Cost-Effective Wiring Closet Catalyst 2900 XL, Catalyst 2950, Catalyst 3500 XL, and Catalyst 3550 GigaStack cluster High-Performance Workgroup Catalyst 3550-12T or Catalyst 3550-12G switch Si Gigabit server Catalyst 2900 XL, Catalyst 2950, Catalyst 3500 XL, and Catalyst 3550 cluster Catalyst 3550-12T or Catalyst 3550-12T or Catalyst 3550-12G switch Catalyst 3550-12G switch 1-Gbps HSRP Si Si Redundant...
... Examples Figure 1-1 Example Configurations Catalyst 2950 switch Chapter 1 Overview Cost-Effective Wiring Closet Catalyst 2900 XL, Catalyst 2950, Catalyst 3500 XL, and Catalyst 3550 GigaStack cluster High-Performance Workgroup Catalyst 3550-12T or Catalyst 3550-12G switch Si Gigabit server Catalyst 2900 XL, Catalyst 2950, Catalyst 3500 XL, and Catalyst 3550 cluster Catalyst 3550-12T or Catalyst 3550-12T or Catalyst 3550-12G switch Catalyst 3550-12G switch 1-Gbps HSRP Si Si Redundant...
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... Secure ports Port grouping Trunk Port Interaction A trunk port cannot be a secure port. 802.1Q trunks can be trunks. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 8-21 If the native VLAN on the trunking strategy for a network: • Make sure the native VLAN for each VLAN ...802.1Q trunk is loop-free before disabling STP. If you entered to all ports in the group: • Allowed-VLAN list • STP path cost for each VLAN • STP Port Fast setting • Trunk status: if one end of the trunk is different from generating DTP frames. Table 8-8...
... Secure ports Port grouping Trunk Port Interaction A trunk port cannot be a secure port. 802.1Q trunks can be trunks. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 8-21 If the native VLAN on the trunking strategy for a network: • Make sure the native VLAN for each VLAN ...802.1Q trunk is loop-free before disabling STP. If you entered to all ports in the group: • Allowed-VLAN list • STP path cost for each VLAN • STP Port Fast setting • Trunk status: if one end of the trunk is different from generating DTP frames. Table 8-8...
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... receives all traffic for all the traffic for a VLAN is in standby mode. In this example, the switches are configured as the VTP server. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 8-25 For load sharing using STP port priorities, both load-sharing links must be from ...priorities on page 9-1. Figure 8-4 Load Sharing by using STP path costs, each load-sharing link can be connected to the same switch or to two different switches. For load sharing using STP port priorities or STP path costs. The trunk port with the lower priority takes over any trunk...
... receives all traffic for all the traffic for a VLAN is in standby mode. In this example, the switches are configured as the VTP server. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 8-25 For load sharing using STP port priorities, both load-sharing links must be from ...priorities on page 9-1. Figure 8-4 Load Sharing by using STP path costs, each load-sharing link can be connected to the same switch or to two different switches. For load sharing using STP port priorities or STP path costs. The trunk port with the lower priority takes over any trunk...
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...; VLANs 8 through 10 are assigned as the interface to 30 for VLAN 2. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 8-27 Configure the port as trunk ports. Repeat Steps 2 through 4 retain the default 100BASE-T path cost on Switch 1 interface fastethernet 0/2. Verify your entries. Enter interface configuration mode, and define fastethernet 0/1 as follows: •...
...; VLANs 8 through 10 are assigned as the interface to 30 for VLAN 2. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 8-27 Configure the port as trunk ports. Repeat Steps 2 through 4 retain the default 100BASE-T path cost on Switch 1 interface fastethernet 0/2. Verify your entries. Enter interface configuration mode, and define fastethernet 0/1 as follows: •...
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... If the VLAN is not allowed on it searches its database for VLAN 4. In the display, verify that the path costs are set the spanning-tree path cost to the VLAN Membership Policy Server (VMPS) and communicates with it identifies a new address. The port must be manually ... 0/2, and set correctly for the VLAN name, the VMPS sends an access-denied or port-shutdown response. 8-28 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 The switch continues to monitor the packets directed to the port and sends a query to global configuration mode. Return to the ...
... If the VLAN is not allowed on it searches its database for VLAN 4. In the display, verify that the path costs are set the spanning-tree path cost to the VLAN Membership Policy Server (VMPS) and communicates with it identifies a new address. The port must be manually ... 0/2, and set correctly for the VLAN name, the VMPS sends an access-denied or port-shutdown response. 8-28 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 The switch continues to monitor the packets directed to the port and sends a query to global configuration mode. Return to the ...
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... location of an interface in the network topology and how well it is the logical center of the transmitting switch • Message age 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 9-3 The STP path cost value represents media speed. If a loop exists in the network. Chapter 9 Configuring STP Understanding Basic STP Features Multiple...
... location of an interface in the network topology and how well it is the logical center of the transmitting switch • Message age 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 9-3 The STP path cost value represents media speed. If a loop exists in the network. Chapter 9 Configuring STP Understanding Basic STP Features Multiple...
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...Maximum-age timer Description Determines how often the switch broadcasts hello messages to the LAN on the path cost. • A designated switch for each switch based on which frames are blocked. The designated switch is the one closest to calculate a BPDU,...switch. Creating the STP Topology In Figure 9-1, Switch A is elected as the root switch. • The shortest distance to the root switch is set to form a new topology with the ideal switch as the root. However, due to traffic patterns, number of all switches connected to other switches. Catalyst 2950 Desktop Switch...
...Maximum-age timer Description Determines how often the switch broadcasts hello messages to the LAN on the path cost. • A designated switch for each switch based on which frames are blocked. The designated switch is the one closest to calculate a BPDU,...switch. Creating the STP Topology In Figure 9-1, Switch A is elected as the root switch. • The shortest distance to the root switch is set to form a new topology with the ideal switch as the root. However, due to traffic patterns, number of all switches connected to other switches. Catalyst 2950 Desktop Switch...
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... paths to the stack. • A switch other than 1 second under normal network conditions) occurs under these circumstances: • The stack root port link fails. When acknowledgements are not obtained by comparing STP root, cost, and bridge ID. Note The fast transition... might not occur. If acknowledgements from all stack switches are received from all stack switches, the Fast Uplink Transition Protocol on the multidrop backbone. 9-14 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380...
... paths to the stack. • A switch other than 1 second under normal network conditions) occurs under these circumstances: • The stack root port link fails. When acknowledgements are not obtained by comparing STP root, cost, and bridge ID. Note The fast transition... might not occur. If acknowledgements from all stack switches are received from all stack switches, the Fast Uplink Transition Protocol on the multidrop backbone. 9-14 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380...
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...STP Configuration, page 9-20 • Disabling STP, page 9-21 • Configuring the Root Switch, page 9-21 • Configuring a Secondary Root Switch, page 9-23 • Configuring STP Port Priority, page 9-24 • Configuring STP Path Cost, page 9-25 • Configuring the Switch Priority of a VLAN, page 9-26 • Configuring the Hello Time, page 9-27 ... state Enabled on page 9-30. Spanning-tree VLAN port priority (configurable on a per -interface basis-used on 128. Hello time 2 seconds. 9-20 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03
...STP Configuration, page 9-20 • Disabling STP, page 9-21 • Configuring the Root Switch, page 9-21 • Configuring a Secondary Root Switch, page 9-23 • Configuring STP Port Priority, page 9-24 • Configuring STP Path Cost, page 9-25 • Configuring the Switch Priority of a VLAN, page 9-26 • Configuring the Hello Time, page 9-27 ... state Enabled on page 9-30. Spanning-tree VLAN port priority (configurable on a per -interface basis-used on 128. Hello time 2 seconds. 9-20 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03
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...-config Purpose Enter global configuration mode. STP uses the cost value when the interface is configured as a trunk port. the default value is 1 to confirm the configuration. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 9-25 For vlan-id, the range...Features For information on page 8-24. Return to 200000000; Valid interfaces include physical interfaces and port-channel logical interfaces (port-channel port-channel-number). A lower path cost represents higher-speed transmission. Configuring STP Path Cost The STP path cost default value is derived from...
...-config Purpose Enter global configuration mode. STP uses the cost value when the interface is configured as a trunk port. the default value is 1 to confirm the configuration. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide 9-25 For vlan-id, the range...Features For information on page 8-24. Return to 200000000; Valid interfaces include physical interfaces and port-channel logical interfaces (port-channel port-channel-number). A lower path cost represents higher-speed transmission. Configuring STP Path Cost The STP path cost default value is derived from...
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the default is 0 to its default setting, use the no spanning-tree cost interface configuration or the no spanning-tree vlan vlan-id priority global configuration command. 9-26 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 Verify your entries. (Optional) Save your entries in ... configuration command. For priority, the range is 32768. Note Exercise care when using STP path costs, see the "Load Sharing Using STP" section on page 8-24. Configuring Basic STP Features Chapter 9 Configuring STP To return the interface to 65535; Beginning in the ...
the default is 0 to its default setting, use the no spanning-tree cost interface configuration or the no spanning-tree vlan vlan-id priority global configuration command. 9-26 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 Verify your entries. (Optional) Save your entries in ... configuration command. For priority, the range is 32768. Note Exercise care when using STP path costs, see the "Load Sharing Using STP" section on page 8-24. Configuring Basic STP Features Chapter 9 Configuring STP To return the interface to 65535; Beginning in the ...
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... no spanning-tree uplinkfast max-update-rate global configuration command. When UplinkFast is disabled, the switch priorities of all VLANs and path costs of connectivity. To disable UplinkFast, use the no spanning-tree uplinkfast command. 9-32 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 UplinkFast cannot be enabled on VLANs that have been...
... no spanning-tree uplinkfast max-update-rate global configuration command. When UplinkFast is disabled, the switch priorities of all VLANs and path costs of connectivity. To disable UplinkFast, use the no spanning-tree uplinkfast command. 9-32 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 UplinkFast cannot be enabled on VLANs that have been...
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... the Ethernet interfaces with different STP path costs can have up to eight compatibly configured Ethernet interfaces. • Configure all interfaces in an EtherChannel to create port-channel interfaces. 10-14 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 Inconsistent... form an EtherChannel even when PAgP is transferred to the group. STP path cost for each VLAN - Understanding the EtherChannel Chapter 10 Configuring the Switch Ports EtherChannel Configuration Guidelines If improperly configured, some EtherChannel interfaces are otherwise compatibly ...
... the Ethernet interfaces with different STP path costs can have up to eight compatibly configured Ethernet interfaces. • Configure all interfaces in an EtherChannel to create port-channel interfaces. 10-14 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 Inconsistent... form an EtherChannel even when PAgP is transferred to the group. STP path cost for each VLAN - Understanding the EtherChannel Chapter 10 Configuring the Switch Ports EtherChannel Configuration Guidelines If improperly configured, some EtherChannel interfaces are otherwise compatibly ...
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...cost type of the list. Note The Catalyst 2950 switch does not support dynamic or reflexive access lists. When creating ACEs in a protocol column means support for the filtering parameter. 2. You cannot reorder the list or selectively add or remove ACEs from a numbered list. 12-10 Catalyst 2950 Desktop Switch... Software Configuration Guide 78-11380-03 Configuring ACLs Chapter 12 Configuring Network Security with ACLs 1. It also does not support filtering based on the specific keywords relative to each protocol, refer to the Cisco IP and IP...
...cost type of the list. Note The Catalyst 2950 switch does not support dynamic or reflexive access lists. When creating ACEs in a protocol column means support for the filtering parameter. 2. You cannot reorder the list or selectively add or remove ACEs from a numbered list. 12-10 Catalyst 2950 Desktop Switch... Software Configuration Guide 78-11380-03 Configuring ACLs Chapter 12 Configuring Network Security with ACLs 1. It also does not support filtering based on the specific keywords relative to each protocol, refer to the Cisco IP and IP...
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..., saving 2-32 CLI 3-10 configuration examples, network 1-8 collapsed backbone and switch cluster 1-12 design concepts cost-effective wiring closet 1-9 high-performance workgroup 1-9 network performance 1-8 network services ...1-8 redundant Gigabit backbone 1-9 large campus 1-13 small to medium-sized network 1-10 configuration files, DHCP 6-7 configuring 802.1p class of service 8-24 AAA 6-23 aging time 6-16 broadcast messages 6-12 broadcast storm control 10-4 IN-6 Catalyst 2950 Desktop Switch...
..., saving 2-32 CLI 3-10 configuration examples, network 1-8 collapsed backbone and switch cluster 1-12 design concepts cost-effective wiring closet 1-9 high-performance workgroup 1-9 network performance 1-8 network services ...1-8 redundant Gigabit backbone 1-9 large campus 1-13 small to medium-sized network 1-10 configuration files, DHCP 6-7 configuring 802.1p class of service 8-24 AAA 6-23 aging time 6-16 broadcast messages 6-12 broadcast storm control 10-4 IN-6 Catalyst 2950 Desktop Switch...