User manual
Table Of Contents
- Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide
- Contents
- Preface
- Overview of the ML-Series Card
- CTC Operations on the ML-Series Card
- Initial Configuration of the ML-Series Card
- Configuring Interfaces on the ML-Series Card
- Configuring POS on the ML-Series Card
- Configuring STP and RSTP on the ML-Series Card
- STP Features
- STP Overview
- Supported STP Instances
- Bridge Protocol Data Units
- Election of the Root Switch
- Bridge ID, Switch Priority, and Extended System ID
- Spanning-Tree Timers
- Creating the Spanning-Tree Topology
- Spanning-Tree Interface States
- Spanning-Tree Address Management
- STP and IEEE 802.1Q Trunks
- Spanning Tree and Redundant Connectivity
- Accelerated Aging to Retain Connectivity
- RSTP Features
- Interoperability with IEEE 802.1D STP
- Configuring STP and RSTP Features
- Default STP and RSTP Configuration
- Disabling STP and RSTP
- Configuring the Root Switch
- Configuring the Port Priority
- Configuring the Path Cost
- Configuring the Switch Priority of a Bridge Group
- Configuring the Hello Time
- Configuring the Forwarding-Delay Time for a Bridge Group
- Configuring the Maximum-Aging Time for a Bridge Group
- Verifying and Monitoring STP and RSTP Status
- STP Features
- Configuring VLANs on the ML-Series Card
- Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling on the ML-Series Card
- Configuring Link Aggregation on the ML-Series Card
- Configuring IRB on the ML-Series Card
- Configuring Quality of Service on the ML-Series Card
- Understanding QoS
- ML-Series QoS
- QoS on RPR
- Configuring QoS
- Monitoring and Verifying QoS Configuration
- QoS Configuration Examples
- Understanding Multicast QoS and Multicast Priority Queuing
- Configuring Multicast Priority Queuing QoS
- QoS not Configured on Egress
- ML-Series Egress Bandwidth Example
- Understanding CoS-Based Packet Statistics
- Configuring CoS-Based Packet Statistics
- Understanding IP SLA
- Configuring the Switching Database Manager on the ML-Series Card
- Configuring Access Control Lists on the ML-Series Card
- Configuring Resilient Packet Ring on the ML-Series Card
- Understanding RPR
- Configuring RPR
- Connecting the ML-Series Cards with Point-to-Point STS Circuits
- Configuring CTC Circuits for RPR
- Configuring RPR Characteristics and the SPR Interface on the ML-Series Card
- Assigning the ML-Series Card POS Ports to the SPR Interface
- Creating the Bridge Group and Assigning the Ethernet and SPR Interfaces
- RPR Cisco IOS Configuration Example
- Verifying Ethernet Connectivity Between RPR Ethernet Access Ports
- CRC Threshold Configuration and Detection
- Monitoring and Verifying RPR
- Add an ML-Series Card into an RPR
- Delete an ML-Series Card from an RPR
- Cisco Proprietary RPR KeepAlive
- Cisco Proprietary RPR Shortest Path
- Redundant Interconnect
- Configuring Security for the ML-Series Card
- Understanding Security
- Disabling the Console Port on the ML-Series Card
- Secure Login on the ML-Series Card
- Secure Shell on the ML-Series Card
- RADIUS on the ML-Series Card
- RADIUS Relay Mode
- RADIUS Stand Alone Mode
- Understanding RADIUS
- Configuring RADIUS
- Default RADIUS Configuration
- Identifying the RADIUS Server Host
- Configuring AAA Login Authentication
- Defining AAA Server Groups
- Configuring RADIUS Authorization for User Privileged Access and Network Services
- Starting RADIUS Accounting
- Configuring a nas-ip-address in the RADIUS Packet
- Configuring Settings for All RADIUS Servers
- Configuring the ML-Series Card to Use Vendor-Specific RADIUS Attributes
- Configuring the ML-Series Card for Vendor-Proprietary RADIUS Server Communication
- Displaying the RADIUS Configuration
- Configuring Bridging on the ML-Series Card
- CE-100T-8 Ethernet Operation
- Command Reference for the ML-Series Card
- [no] bridge bridge-group-number protocol {drpri-rstp | ieee | rstp}
- clear counters
- [no] clock auto
- interface spr 1
- [no] pos mode gfp [fcs-disabled]
- [no] pos pdi holdoff time
- [no] pos report alarm
- [non] pos trigger defects condition
- [no] pos trigger delay time
- [no] pos vcat defect {immediate | delayed}
- show controller pos interface-number [details]
- show interface pos interface-number
- show ons alarm
- show ons alarm defect {[eqpt | port [port-number] | sts [sts-number] | vcg [vcg-number] | vt]}
- show ons alarm failure {[eqpt | port [port-number] | sts [sts-number] | vcg [vcg-number] | vt]}
- spr-intf-id shared-packet-ring-number
- [no] spr load-balance { auto | port-based }
- spr station-id station-id-number
- spr wrap { immediate | delayed }
- Unsupported CLI Commands for the ML-Series Card
- Using Technical Support
- Index
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Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide R8.5
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Chapter 6 Configuring STP and RSTP on the ML-Series Card
RSTP Features
Accelerated Aging to Retain Connectivity
The default for aging dynamic addresses is 5 minutes, which is the default setting of the bridge
bridge-group-number aging-time global configuration command. However, a spanning-tree
reconfiguration can cause many station locations to change. Because these stations could be unreachable
for 5 minutes or more during a reconfiguration, the address-aging time is accelerated so that station
addresses can be dropped from the address table and then relearned.
Because each VLAN is a separate spanning-tree instance, the switch accelerates aging on a per-VLAN
basis. A spanning-tree reconfiguration on one VLAN can cause the dynamic addresses learned on that
VLAN to be subject to accelerated aging. Dynamic addresses on other VLANs can be unaffected and
remain subject to the aging interval entered for the switch.
RSTP Features
RSTP provides rapid convergence of the spanning tree. It improves the fault tolerance of the network
because a failure in one instance (forwarding path) does not affect other instances (forwarding paths).
The most common initial deployment of RSTP is in the backbone and distribution layers of a Layer 2
switched network; this deployment provides the highly available network required in a service-provider
environment.
RSTP improves the operation of the spanning tree while maintaining backward compatibility with
equipment that is based on the (original) IEEE 802.1D spanning tree.
RSTP takes advantage of point-to-point wiring and provides rapid convergence of the spanning tree.
Reconfiguration of the spanning tree can occur in less than 2 second (in contrast to 50 seconds with the
default settings in the IEEE 802.1D spanning tree), which is critical for networks carrying
delay-sensitive traffic such as voice and video.
These sections describe how RSTP works:
• Supported RSTP Instances, page 6-9
• Port Roles and the Active Topology, page 6-10
• Rapid Convergence, page 6-11
• Synchronization of Port Roles, page 6-12
• Bridge Protocol Data Unit Format and Processing, page 6-13
• Topology Changes, page 6-14
Supported RSTP Instances
The ML Series supports per-VLAN rapid spanning tree (PVRST) and a maximum of 255 rapid
spanning-tree instances.
Caution At more than 100 RSTP instances the RSTP instances may flap and may result in MAC entries flushed,
and MAC entries learned again and again. This will cause flooding in the network.. So it is recommended
to keep the RSTP instances to be less than 100, to keep system from being unstable.