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Cisco NCS 4200 Series Configuration Manual

Cisco NCS 4200 Series Configuration Manual

Lan switching
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LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1
(Cisco NCS 4200 Series)
First Published: 2017-07-31
Americas Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 527-0883

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Summary of Contents for Cisco NCS 4200 Series

  • Page 1 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series) First Published: 2017-07-31 Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 527-0883...
  • Page 2 Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks . Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company.

  • Page 3: Table Of Contents

    ITU-T G.8032 Ethernet Ring Protection Switching Functionality R-APS Control Messages CFM Protocols and Link Failures G.8032 Ring-Supported Commands and Functionality G.8032 ERP Timers Protection Switching Functionality in a Single Link Failure and Recovery LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 4 Blocking State Listening State Learning State Forwarding State Disabled State How a Switch or Port Becomes the Root Switch or Root Port Spanning Tree and Redundant Connectivity LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 5 Configuring the Switch Priority of a VLAN Configuring Spanning-Tree Timers Configuring the Hello Time Configuring the Forwarding-Delay Time for a VLAN Configuring the Maximum-Aging Time for a VLAN Displaying the Spanning-Tree Status LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 6 Contents LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 7: Unidirectional Link Detection (Udld) Protocol

    Information About the UDLD Protocol UDLD Overview The Cisco-proprietary UDLD protocol allows the devices connected through fiber optic or copper (for example, Category 5 cabling) Ethernet cables that are connected to the LAN ports to monitor the physical configuration of the cables and detect whether a unidirectional link exists. When a unidirectional link is detected, the UDLD shuts down the affected LAN port and alerts the corresponding user, because unidirectional links cause a variety of problems, including spanning tree topology loops.

  • Page 8: Udld Normal Mode

    UDLD neighbor relationship established stops receiving the UDLD packets. The UDLD tries to re-establish the connection with the neighbor; the port is disabled after eight failed retries. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 9: Udld Functions

    UDLD mode. When UDLD is in normal mode, the link might be considered undetermined and might not be shut down. When UDLD is in LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 10: How To Configure Udld Protocol

    Router# configure terminal Step 3 udld {enable|aggressive} Enables UDLD protocol on the router. Example: Router(config)# udld enable Step 4 Returns to privileged EXEC mode. Example: Router# end LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 11: Enabling Udld Protocol At Interface Level

    Use the no form of this command to disable the UDLD on a non fiber-optic LAN port. Step 5 Returns to privileged EXEC mode. Example: Router# end LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 12: Enabling Udld Probe Message Interval

    UDLD recovery when enabled, attempts to bring an UDLD error-disabled port out of reset. Tthe default recovery timer is 300 seconds. SUMMARY STEPS 1. enable 2. configure terminal 3. udld recovery inteval 4. end LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 13: Resetting Ports

    Enables privileged EXEC mode. enable Enter your password if prompted. Example: Router> enable Step 2 udld reset Resets ports that are shut down by UDLD. Example: Router(config)# udld reset LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 14: Configuration Examples

    Device ID: FOX1736P0JP Port ID: Te0/1/0 Neighbor echo 1 device: FOX1709P3D0 Neighbor echo 1 port: Te0/0/0 Message interval: 15 Time out interval: 5 CDP Device name: RSP1B Interface Gi0/2/0 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 15 Interface Gi0/2/4 Port enable administrative configuration setting: Follows device default Port enable operational state: Disabled Current bidirectional state: Unknown Interface Gi0/2/5 Port enable administrative configuration setting: Disabled LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 16 Router# show udld neighbors Port Device Name Device ID Port ID Neighbor State ------------ ------------- ------------ ------------ ---------------- Te0/0/0 FOX1736P0JP Te0/1/0 Bidirectional Gi0/2/0 FOC1528V27K Gi0/2 Bidirectional Gi0/2/1 FOC1639V1Z4 Gi0/4 Bidirectional LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 17: Itu-T G.8032 Ethernet Ring Protection Switching

    Ring Protection Link (RPL). A ring link is bound by two adjacent Ethernet ring nodes and a port for a ring link (also known as a ring port). There must be at least two Ethernet ring nodes in a Ethernet ring. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 18: Itu-T G.8032 Ethernet Ring Protection Switching Functionality

    R-APS Signal Failure (R-APS SF) message in both directions of the nodes adjacent to the failed link, after the nodes have blocked the port facing the failed link. On obtaining this message, the RPL owner unblocks the RPL port. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 19: Cfm Protocols And Link Failures

    VLANs can be configured under only one instance. They cannot overlap multiple instances. Otherwise, data traffic or Ring Automatic Protection Switching (R-APS) messages may cross logical rings, which is not desirable. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 20: G.8032 Erp Timers

    The default time interval is 0 seconds; the time interval ranges from 0 to 10 seconds. Faults are reported to the ring protection mechanism only if this timer expires. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 21: Protection Switching Functionality In A Single Link Failure And Recovery

    4 Ethernet ring nodes C and D start sending Ring Automatic Protection Switching (R-APS) SF messages periodically along with the (node ID and bidirectional path-protected ring (BPR) identifier pair) on both ring ports while the SF condition persists. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 22 Ethernet ring node D receives an R-APS NR message with a higher node ID from Ethernet ring node C, and unblocks its nonfailed ring port. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 23: Ethernet Flow Points

    • Local switch-to-switch forwarding between two different interfaces • Feature commands—In each EFP, the QoS features or parameters can be changed and the ACL can be updated. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 24: Service Instances And Associated Efps

    • G.8032 is supported only on EFP with dot1q, dot1ad, QinQ, or dot1ad-dot1Q encapsulation type. G.8032 is supported only on TEFP with dot1q. Note • G.8032 is not supported on xconnect interface. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 25: How To Configure Itu-T G.8032 Ethernet Ring Protection Switching

    Device# configure terminal Step 3 ethernet ring g8032 profile profile-name Creates the Ethernet ring profile and enters Ethernet ring profile configuration mode. Example: Device(config)# ethernet ring g8032 profile profile1 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 26: Configuring Ethernet Cfm Meps

    To enable Ethernet Fault Detection (EFD) for a service to achieve fast convergence, complete the following steps Link protection is not supported on the RSP3 Module. Note LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 27 Enables link protection globally on the router. Example: Device(config)# link-protection enable Step 5 link-protection group management vlan vlan-id Defines the management VLAN used for link protection. Example: Device(config)# link-protection group management vlan 51 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 28: Configuring The Ethernet Protection Ring

    Device(config-ecfm-srv)# efd notify g8032 Step 11 Returns to user EXEC mode. Example: Device(config-ecfm-srv)# end Configuring the Ethernet Protection Ring To configure the Ethernet Protection Ring (EPR), complete the following steps. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 29 Example: Device# configure terminal Step 3 ethernet ring g8032 ring-name Specifies the Ethernet ring and enters Ethernet ring port configuration mode. Example: Device(config)# ethernet ring g8032 ring1 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 30 Specifies VLANs that are unprotected by the Ethernet ring protection mechanism. Example: Device(config-erp-ring)# exclusion-list vlan-ids 2 Step 11 open-ring Specifies the Ethernet ring as an open ring. Example: Device(config-erp-ring)# open-ring LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 31 • All nodes in the Ethernet ring must be configured with the same level. Device(config-erp-inst-aps)# level 5 Step 19 port0 service instance instance-id Associates APS channel information with port0. Example: Device(config-erp-inst-aps)# port0 service instance 100 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 32: Configuring Topology Change Notification Propagation

    Allows topology change notification (TCN) propagation from a source protocol to a destination protocol. Example: • Source and destination protocols vary by platform and release. Device(config)# ethernet tcn-propagation G8032 to G8032 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 33: Configuring A Service Instance

    Step 2 Enters global configuration mode. configure terminal Example: Device# configure terminal Step 3 interface type number Specifies the interface type and number. Example: Device(config)# interface gigabitethernet 0/1/0 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 34: Verifying The Ethernet Ring Protection (Erp) Switching Configuration

    7. show ethernet ring g8032 port status interface [type number] 8. show ethernet ring g8032 configuration [ring-name] instance [instance-id] 9. show ethernet ring g8032 trace {ctrl [ring-name instance instance-id] | sm} 10. end LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 35 [type number] Displays Ethernet ring port status information for the interface. Example: Device# show ethernet ring g8032 port status interface gigabitethernet 0/0/1 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 36: Configuration Examples For Itu-T G.8032 Ethernet Ring Protection Switching

    102 instance 1 profile profile_ABC rpl port0 owner inclusion-list vlan-ids 100 aps-channel port0 service instance 100 port1 service instance 100 interface GigabitEthernet0/1/0 mtu 9216 no ip address LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 37: Example: Enabling Ethernet Fault Detection For A Service

    1 symmetric bridge-domain 1001 cfm mep domain G8032 mpid 20 service instance 1002 ethernet 8032-evc-1 encapsulation dot1q 1002 rewrite ingress tag pop 1 symmetric LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 38: Example: Verifying The Ethernet Ring Protection Configuration

    Exclusion-list VLAN IDs: 4001-4050 Open-ring: no Instance 1 Description: Profile: RPL: Inclusion-list VLAN IDs: 2,10-500 APS channel Level: 7 Port0: Service Instance 1 Port1: Service Instance 1 State: configuration resolved LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 39: Multiple Spanning Tree Protocol

    By default, MSTP is disabled on all interfaces. MSTP need not be enabled explicitly on each interfaces. By turning the global configuration on, it is enabled on all interfaces. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 40: Configuring Multiple Spanning Tree Protocol

    Sets the name of the MSTP region. Example: Device(config-mstp)# name m1 Step 6 revision revision -number Sets the revision level of the MSTP region. Example: Device(config-mstp)#)revision 1 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 41: Configuring Untagged Efp Over Mst Interface

    Example: Router(config)# interface gigabitEthernet 0/0/5 Step 4 Disables the IP address on the interface. no ip address Example: Router (config-if)# no ip address LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 42 GigabitEthernet0/0/0 no ip address negotiation auto service instance trunk 10 ethernet encapsulation dot1q 10-20 bridge-domain from-encapsulation service instance 1024 ethernet encapsulation untagged l2protocol peer stp bridge-domain 1024 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 43: Configuring Pvst+ And Rpvst

    This chapter describes how to configure the Spanning Tree Protocol (STP) on port-based VLANs on the Cisco router. The router can use the per-VLAN spanning-tree plus (PVST+) protocol based on the IEEE 802.1D standard and Cisco proprietary extensions, or the rapid per-VLAN spanning-tree plus (rapid-PVST+) protocol based on the IEEE 802.1w standard.

  • Page 44: Stp Overview

    The stable, active spanning-tree topology of a switched network is controlled by these elements: • The unique bridge ID (switch priority and MAC address) associated with each VLAN on each switch. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 45 LAN is called the designated port. All paths that are not needed to reach the root switch from anywhere in the switched network are placed in the spanning-tree blocking mode. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 46: Bridge Id, Switch Priority, And Extended System Id

    • Blocking—The interface does not participate in frame forwarding. • Listening—The first transitional state after the blocking state when the spanning tree determines that the interface should participate in frame forwarding. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 47 3 In the learning state, the interface continues to block frame forwarding as the switch learns end-station location information for the forwarding database. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 48: Blocking State

    An interface in the learning state performs these functions: • Discards frames received on the interface • Discards frames switched from another interface for forwarding • Learns addresses • Receives BPDUs LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 49: Forwarding State

    However, because of traffic patterns, number of forwarding interfaces, or link types, Switch A might not be the ideal root switch. By increasing the priority (lowering the numerical value) of the ideal switch so that it LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 50: Spanning Tree And Redundant Connectivity

    If the speeds are the same, the port priority and port ID are added together, and spanning tree disables the link with the lowest value. Figure 7: Spanning Tree and Redundant Connectivity LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 51: Spanning-Tree Modes And Protocols

    The following spanning-tree modes and protocols are supported: • PVST+—This spanning-tree mode is based on the IEEE 802.1D standard and Cisco proprietary extensions. The PVST+ runs on each VLAN on the switch up to the maximum supported, ensuring that each has a loop-free path through the network.

  • Page 52: Spanning-Tree Interoperability And Backward Compatibility

    Spanning-tree port cost (configurable on a per-interface basis) 1000 Mbps: 4. 100 Mbps: 19. 10 Mbps: 100. Spanning-tree VLAN port priority (configurable on a per-VLAN 128. basis) LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 53: Configuring Pvst+ And Rpvst

    • Select rapid-pvst to enable rapid PVST+. Step 3 spanning-tree vlan vlan-range Configures STP on the range of VLAN specified. Step 4 Return to privileged EXEC mode. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 54: Configuring Stp Peer Under Efp/Tefp

    1 ethernet Step 5 encapsulation dot1q vlan-id Defines the matching criteria to map 802.1Q frames ingress on an interface to the appropriate service instance. Example: router(config-if-srv)#encapsulation dot1q 1-100 LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 55: Disabling Spanning Tree

    Beginning in privileged EXEC mode, follow these steps to disable spanning-tree on a per-VLAN basis. This procedure is optional. SUMMARY STEPS 1. configure terminal 2. no spanning-tree vlan vlan-id 3. end 4. show spanning-tree vlan vlan-id LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 56: Verifying Pvst/Rpvst Settings

    Extended system ID is enabled Portfast Default is disabled PortFast BPDU Guard Default is disabled Portfast BPDU Filter Default is disabled Loopguard Default is disabled UplinkFast is disabled LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 57: Configuring The Root Switch

    Beginning in privileged EXEC mode, follow these steps to configure a switch to become the root for the specified VLAN. This procedure is optional. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 58: Configuring A Secondary Root Switch

    . Beginning in privileged EXEC mode, follow these steps to configure a switch to become the secondary root for the specified VLAN. This procedure is optional. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 59: Configuring Port Priority

    Beginning in privileged EXEC mode, follow these steps to configure the port priority of a spanning-tree port. This procedure is optional. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)
  • Page 60 The show spanning-tree interface interface-id privileged EXEC c ommand displays information only Note if the port is in a link-up operative state. Otherwise, you can use the show running-config interface privileged EXEC command to confirm the configuration. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 61: Configuring Path Cost

    For cost, the range is 1 to 200000000; the default value is derived from the media speed of the interface. Step 4 Return to privileged EXEC mode. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 62: Configuring The Switch Priority Of A Vlan

    2. spanning-tree vlan vlan-id priority priority 3. end 4. show spanning-tree vlan vlan-id 5. copy running-config startup-config DETAILED STEPS Command or Action Purpose Step 1 configure terminal Enter global configuration mode. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 63: Configuring Spanning-Tree Timers

    STP port. Configuring the Hello Time You can configure the interval between the generation of configuration messages by the root switch by changing the hello time. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 64: Configuring The Forwarding-Delay Time For A Vlan

    Configuring the Forwarding-Delay Time for a VLAN Beginning in privileged EXEC mode, follow these steps to configure the forwarding-delay time for a VLAN. This procedure is optional. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 65: Configuring The Maximum-Aging Time For A Vlan

    Beginning in privileged EXEC mode, follow these steps to configure the maximum-aging time for a VLAN. This procedure is optional. SUMMARY STEPS 1. configure terminal 2. spanning-tree vlan vlan-id max-age seconds 3. end 4. show spanning-tree vlan vlan-id 5. copy running-config startup-config LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

  • Page 66: Displaying The Spanning-Tree Status

    You can clear spanning-tree counters by using the clear spanning-tree [interfaceinterface-id ] privileged EXEC command. For information about other keywords for the show spanning-tree privileged EXEC command, see the command reference for this release. LAN Switching Configuration Guide, Cisco IOS XE Everest 16.6.1 (Cisco NCS 4200 Series)

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