User Guide
Page 4
... priority STP port cost Default Value switchport mode access / trunk switchport trunk encapsulation dot1q VLANs 1-1005 VLAN 1 VLAN 1 Enabled for all VLANs allowed on every VLAN in the network. Inconsistencies detected by a cloud of 802.1Q switches that is not Cisco devised, is the...switches that are not Cisco switches. Switchport mode trunk puts the interface into nontrunking mode. Only access VLAN traffic will stay in 1000-Mb mode When you disable spanning tree on the access port and untagged (802.3). Make sure that your network is . and 36-Port Ethernet Switch Module...
... priority STP port cost Default Value switchport mode access / trunk switchport trunk encapsulation dot1q VLANs 1-1005 VLAN 1 VLAN 1 Enabled for all VLANs allowed on every VLAN in the network. Inconsistencies detected by a cloud of 802.1Q switches that is not Cisco devised, is the...switches that are not Cisco switches. Switchport mode trunk puts the interface into nontrunking mode. Only access VLAN traffic will stay in 1000-Mb mode When you disable spanning tree on the access port and untagged (802.3). Make sure that your network is . and 36-Port Ethernet Switch Module...
User Guide
Page 8
...interfaces are otherwise compatibly configured. If the allowed range of eight interfaces) with different Spanning Tree Protocol (STP) port path costs can pass through the port to which the client is not the same, the interfaces do not form an EtherChannel. As ...a trunking Layer 2 EtherChannel. and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Use the option that restricts unauthorized devices from gaining access to one of VLANs on a channel is transferred to the network. For Layer 2 EtherChannels: • Assign all ...
...interfaces are otherwise compatibly configured. If the allowed range of eight interfaces) with different Spanning Tree Protocol (STP) port path costs can pass through the port to which the client is not the same, the interfaces do not form an EtherChannel. As ...a trunking Layer 2 EtherChannel. and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Use the option that restricts unauthorized devices from gaining access to one of VLANs on a channel is transferred to the network. For Layer 2 EtherChannels: • Assign all ...
User Guide
Page 12
.... These conditions result in a wireless LAN. The spanning tree port path cost value represents media speed. Multiple active paths between any two stations. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 12 Spanning Tree Protocol defines a tree with Ethernet switch network module Authentication server (RADIUS) 88850 Wireless client Spanning Tree Protocol This section...
.... These conditions result in a wireless LAN. The spanning tree port path cost value represents media speed. Multiple active paths between any two stations. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 12 Spanning Tree Protocol defines a tree with Ethernet switch network module Authentication server (RADIUS) 88850 Wireless client Spanning Tree Protocol This section...
User Guide
Page 13
...this information to the root bridge. • Ports included in the spanning tree are placed in a switched network. and 36-Port Ethernet Switch Module for each switch • The spanning tree path cost to the root bridge • The port identifier (port priority and MAC address) associated with the...: • The unique bridge ID of the transmitting port • Values for each switch sends configuration BPDUs to calculate a BPDU, and, if the topology changes, initiate a BPDU transmission. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 13 16- The spanning tree root...
...this information to the root bridge. • Ports included in the spanning tree are placed in a switched network. and 36-Port Ethernet Switch Module for each switch • The spanning tree path cost to the root bridge • The port identifier (port priority and MAC address) associated with the...: • The unique bridge ID of the transmitting port • Values for each switch sends configuration BPDUs to calculate a BPDU, and, if the topology changes, initiate a BPDU transmission. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 13 16- The spanning tree root...
User Guide
Page 21
...-Mb mode Spanning tree VLAN port priority (configurable on a per -VLAN basis; In the event of an interface. and 36-Port Ethernet Switch Module for all interfaces have the same priority value, spanning tree puts the interface with the first MAC address in the range assigned to VLAN ... the default Spanning Tree configuration values. Default Spanning Tree Configuration In Table 4 you can assign lower cost values to interfaces that you want spanning tree to VLAN 2, and so forth. Cisco IOS software uses the port priority value when the interface is configured as a trunk port. used...
...-Mb mode Spanning tree VLAN port priority (configurable on a per -VLAN basis; In the event of an interface. and 36-Port Ethernet Switch Module for all interfaces have the same priority value, spanning tree puts the interface with the first MAC address in the range assigned to VLAN ... the default Spanning Tree configuration values. Default Spanning Tree Configuration In Table 4 you can assign lower cost values to interfaces that you want spanning tree to VLAN 2, and so forth. Cisco IOS software uses the port priority value when the interface is configured as a trunk port. used...
User Guide
Page 22
...on a blocked port, the root port and other interfaces. If the inferior BPDU arrives on Switch C that you want spanning tree to expire. and 36-Port Ethernet Switch Module for the configured maximum aging time specified by the spanning-tree max-age global configuration command. ... and learning states, and into the forwarding state. Under STP rules, the switch ignores inferior BPDUs for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series cost values to interfaces that connects directly to Switch B is not directly connected (an indirect link) has failed (that it still...
...on a blocked port, the root port and other interfaces. If the inferior BPDU arrives on Switch C that you want spanning tree to expire. and 36-Port Ethernet Switch Module for the configured maximum aging time specified by the spanning-tree max-age global configuration command. ... and learning states, and into the forwarding state. Under STP rules, the switch ignores inferior BPDUs for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series cost values to interfaces that connects directly to Switch B is not directly connected (an indirect link) has failed (that it still...
User Guide
Page 67
... priority 16384, address 0060.704c.7000 Root port is 264 (FastEthernet5/8), cost of root path is forwarding Port path cost 19, Port priority 128, Port Identifier 129.9. Exits configuration mode. 16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Configuration Tasks Configuring Spanning Tree • Enabling Spanning Tree...
... priority 16384, address 0060.704c.7000 Root port is 264 (FastEthernet5/8), cost of root path is forwarding Port path cost 19, Port priority 128, Port Identifier 129.9. Exits configuration mode. 16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Configuration Tasks Configuring Spanning Tree • Enabling Spanning Tree...
User Guide
Page 68
... restore the defaults. Configures the port cost for an interface. Use the no form of 4. Configures the VLAN port priority for an interface. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 68 Use the no form of 4. Exits configuration mode. and 36-Port Ethernet Switch Module for an interface. Designated root has...
... restore the defaults. Configures the port cost for an interface. Use the no form of 4. Configures the VLAN port priority for an interface. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 68 Use the no form of 4. Exits configuration mode. and 36-Port Ethernet Switch Module for an interface. Designated root has...
User Guide
Page 69
...end Purpose Configures the bridge priority of VLAN200 is 128.1, designated path cost 0 Timers: message age 2, forward delay 0, hold 0 Number of transitions to restore the defaults. 16- and 36-Port Ethernet Switch Module for an interface. Designated root has priority 32768, address 0010.0d40....34c7 Designated bridge has priority 32768, address 0010.0d40.34c7 Designated port id is forwarding Port path cost 17, Port priority 64, Port Identifier 129.8. Cisco IOS Release 12.2(2)...
...end Purpose Configures the bridge priority of VLAN200 is 128.1, designated path cost 0 Timers: message age 2, forward delay 0, hold 0 Number of transitions to restore the defaults. 16- and 36-Port Ethernet Switch Module for an interface. Designated root has priority 32768, address 0010.0d40....34c7 Designated bridge has priority 32768, address 0010.0d40.34c7 Designated port id is forwarding Port path cost 17, Port priority 64, Port Identifier 129.8. Cisco IOS Release 12.2(2)...
User Guide
Page 81
...cost bit. and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Configuration Tasks Supported parameters can be grouped into these categories: • TCP • UDP Table 12 lists the possible filtering parameters for ACEs for Cisco IOS Release 12.2. Note The Ethernet switch network module... does not support dynamic or reflexive access lists. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 81 It...
...cost bit. and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Configuration Tasks Supported parameters can be grouped into these categories: • TCP • UDP Table 12 lists the possible filtering parameters for ACEs for Cisco IOS Release 12.2. Note The Ethernet switch network module... does not support dynamic or reflexive access lists. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 81 It...
User Guide
Page 121
... a Specific MAC Address, page 124 • Adjusting Spanning-Tree Parameters, page 124 • Monitoring and Maintaining the Network, page 129 Understanding the Default Fallback Bridging Configuration Table 16 shows the default fallback bridging configuration. Table 16 Default Fallback Bridging...bridge STP is defined. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 121 and 36-Port Ethernet Switch Module for dynamic entries MAC-layer frame filtering Spanning tree parameters: • Switch priority • Interface priority • Interface path cost • Hello BPDU ...
... a Specific MAC Address, page 124 • Adjusting Spanning-Tree Parameters, page 124 • Monitoring and Maintaining the Network, page 129 Understanding the Default Fallback Bridging Configuration Table 16 shows the default fallback bridging configuration. Table 16 Default Fallback Bridging...bridge STP is defined. Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 121 and 36-Port Ethernet Switch Module for dynamic entries MAC-layer frame filtering Spanning tree parameters: • Switch priority • Interface priority • Interface path cost • Hello BPDU ...
User Guide
Page 124
...Step 4 Step 5 Command Purpose configure terminal Enters global configuration mode. bridge bridge-group address mac-address Specifies the MAC address to its originating network segment. The range is 1 to 255. • For address mac-address, specify the MAC-layer destination address to be filtered. •... 125 • Assigning a Path Cost, page 126 • Adjusting BPDU Intervals, page 126 • Disabling the Spanning Tree on an Interface, page 128 124 Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ and 36-Port Ethernet Switch Module for your entry. copy running -...
...Step 4 Step 5 Command Purpose configure terminal Enters global configuration mode. bridge bridge-group address mac-address Specifies the MAC address to its originating network segment. The range is 1 to 255. • For address mac-address, specify the MAC-layer destination address to be filtered. •... 125 • Assigning a Path Cost, page 126 • Adjusting BPDU Intervals, page 126 • Disabling the Spanning Tree on an Interface, page 128 124 Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ and 36-Port Ethernet Switch Module for your entry. copy running -...
User Guide
Page 126
... the more likely that the interface on the switch will be chosen as described in these steps to privileged EXEC mode. Returns to assign a path cost: Step 1 Step 2 Command configure terminal interface interface-id Step 3 bridge-group bridge-group path-cost cost Step 4 Step 5 Step 6 end show... enter a number from 1 to set the path cost. For 100 Mbps, the default path cost is 100. - Returns to 255. For 10 Mbps, the default path cost is 19. - and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Step 3 Command bridge-group bridge-group...
... the more likely that the interface on the switch will be chosen as described in these steps to privileged EXEC mode. Returns to assign a path cost: Step 1 Step 2 Command configure terminal interface interface-id Step 3 bridge-group bridge-group path-cost cost Step 4 Step 5 Step 6 end show... enter a number from 1 to set the path cost. For 100 Mbps, the default path cost is 100. - Returns to 255. For 10 Mbps, the default path cost is 19. - and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Step 3 Command bridge-group bridge-group...
User Guide
Page 136
... terminal Router(config)# interface fastethernet 5/8 Router(config-if)# spanning-tree cost 18 Router(config-if)# end Router# 136 Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ and 36-Port Ethernet Switch Module Switch(config)# interface fastethernet0/1 Switch(config-if)# dot1x port-control auto Switch(config-if)# dot1x multiple-hosts Spanning Tree Examples • Spanning-Tree...
... terminal Router(config)# interface fastethernet 5/8 Router(config-if)# spanning-tree cost 18 Router(config-if)# end Router# 136 Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ and 36-Port Ethernet Switch Module Switch(config)# interface fastethernet0/1 Switch(config-if)# dot1x port-control auto Switch(config-if)# dot1x multiple-hosts Spanning Tree Examples • Spanning-Tree...
User Guide
Page 137
... terminal Router(config)# spanning-tree vlan 200 max-age 36 Router(config)# end Router# Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 137 and 36-Port Ethernet Switch Module The following example shows how to verify the configuration of the interface when it is configured...13513 Router# The following example shows how to configure the spanning-tree VLAN port cost of a Fast Ethernet interface: Router# configure terminal Router(config)# interface fastethernet 5/8 Router(config-if)# spanning-tree vlan 200 cost 17 Router(config-if)# exit Router(config)# exit Router# Bridge Priority of a ...
... terminal Router(config)# spanning-tree vlan 200 max-age 36 Router(config)# end Router# Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ 137 and 36-Port Ethernet Switch Module The following example shows how to verify the configuration of the interface when it is configured...13513 Router# The following example shows how to configure the spanning-tree VLAN port cost of a Fast Ethernet interface: Router# configure terminal Router(config)# interface fastethernet 5/8 Router(config-if)# spanning-tree vlan 200 cost 17 Router(config-if)# exit Router(config)# exit Router# Bridge Priority of a ...
User Guide
Page 155
...page 156 • Changing the Interface Priority Example, page 156 • Assigning a Path Cost Example, page 156 • Adjusting BPDU Intervals Example, page 156 • Disabling the Spanning Tree on your switch. It contains this configuration information: • Creating a Bridge Group Example, page 155 ...table aging time to 200 seconds for the 16- 16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Configuration Examples for bridge group 10: Switch(config)# bridge 10 aging-time 200 Filtering Frames by a Specific MAC Address Example ...
...page 156 • Changing the Interface Priority Example, page 156 • Assigning a Path Cost Example, page 156 • Adjusting BPDU Intervals Example, page 156 • Disabling the Spanning Tree on your switch. It contains this configuration information: • Creating a Bridge Group Example, page 155 ...table aging time to 200 seconds for the 16- 16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Configuration Examples for bridge group 10: Switch(config)# bridge 10 aging-time 200 Filtering Frames by a Specific MAC Address Example ...
User Guide
Page 156
...Switch(config)# interface gigabitethernet0/1 Switch(config-if)# bridge-group 10 priority 20 Assigning a Path Cost Example The following example shows how to change the path cost on an interface to 10 in bridge group 10: Switch(config)# interface gigabitethernet0/1 Switch(config-if)# bridge-group 10 path-cost... Switch Module Changing the Switch Priority Example The following example shows how to set the switch priority to disable spanning tree on an interface in bridge group 10: Switch(config)# interface gigabitethernet0/1 Switch(config-if)# bridge group 10 spanning-disabled 156 Cisco IOS...
...Switch(config)# interface gigabitethernet0/1 Switch(config-if)# bridge-group 10 priority 20 Assigning a Path Cost Example The following example shows how to change the path cost on an interface to 10 in bridge group 10: Switch(config)# interface gigabitethernet0/1 Switch(config-if)# bridge-group 10 path-cost... Switch Module Changing the Switch Priority Example The following example shows how to set the switch priority to disable spanning tree on an interface in bridge group 10: Switch(config)# interface gigabitethernet0/1 Switch(config-if)# bridge group 10 spanning-disabled 156 Cisco IOS...
User Guide
Page 232
... series, Cisco 3600 series, and Cisco 3700 series routers. The range is omitted, the command applies to 1005. Enter each interface separated by a space. Valid interfaces include physical ports and VLANs. (Optional) Displays the default path cost method. (Optional) Displays root-switch status and .... (Optional) Displays spanning-tree UplinkFast status. (Optional) Specifies the VLAN ID. and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series show spanning-tree command in privileged EXEC mode. Usage Guidelines If the variable vlan-id is...
... series, Cisco 3600 series, and Cisco 3700 series routers. The range is omitted, the command applies to 1005. Enter each interface separated by a space. Valid interfaces include physical ports and VLANs. (Optional) Displays the default path cost method. (Optional) Displays root-switch status and .... (Optional) Displays spanning-tree UplinkFast status. (Optional) Specifies the VLAN ID. and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series show spanning-tree command in privileged EXEC mode. Usage Guidelines If the variable vlan-id is...
User Guide
Page 233
and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series show spanning-tree Examples The following is sample output from the show spanning-tree summary command: Switch# show spanning-tree summary UplinkFast is disabled Name Blocking Listening Learning Forwarding STP Active VLAN1 23 0 0 1 ... Configured hello time 2, max age 20, forward delay 15 Current root has priority 32768, address 0010.0b3f.ac80 Root port is 5, cost of root path is 10 Topology change flag not set, detected flag not set, changes 1 Times: hold 1, topology change 35, ...
and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series show spanning-tree Examples The following is sample output from the show spanning-tree summary command: Switch# show spanning-tree summary UplinkFast is disabled Name Blocking Listening Learning Forwarding STP Active VLAN1 23 0 0 1 ... Configured hello time 2, max age 20, forward delay 15 Current root has priority 32768, address 0010.0b3f.ac80 Root port is 5, cost of root path is 10 Topology change flag not set, detected flag not set, changes 1 Times: hold 1, topology change 35, ...
User Guide
Page 234
...Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Designated bridge has priority 32768, address 00e0.1eb2.ddc0 Designated port is 3, path cost 410 Timers: message age 0, forward delay 0, hold 0 BPDU: sent 0, received 0 . . . show spanning-tree interface fastethernet0/3 Interface Fa0/3 (port 3) in Spanning tree 1 is down Port path cost... Designated port is 1, path cost 10 Timers: message age 0, forward delay 0, hold 0 BPDU: sent 0, received 0 Related Commands Command spanning-tree vlan Description Enables STP on a VLAN. 234 Cisco IOS Release 12.2(2)XT, 12...
...Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Designated bridge has priority 32768, address 00e0.1eb2.ddc0 Designated port is 3, path cost 410 Timers: message age 0, forward delay 0, hold 0 BPDU: sent 0, received 0 . . . show spanning-tree interface fastethernet0/3 Interface Fa0/3 (port 3) in Spanning tree 1 is down Port path cost... Designated port is 1, path cost 10 Timers: message age 0, forward delay 0, hold 0 BPDU: sent 0, received 0 Related Commands Command spanning-tree vlan Description Enables STP on a VLAN. 234 Cisco IOS Release 12.2(2)XT, 12...