HP 3100 Series User Manual

69
Configuring the network diameter of a switched
network
Any two terminal devices in a switched network are connected through a specific path composed of
a series of devices. The network diameter is the number of devices on the path composed of the
most devices. The network diameter is a parameter that indicates the network size. A bigger network
diameter indicates a larger network size. Based on the network diameter you configured, the system
automatically sets an optimal hello time, forward delay, and max age for the device.
To configure the network diameter of a switched network:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Configure the network
diameter of the switched
network.
• In STP/RSTP/MSTP mode:
stp bridge-diameter diameter
• In PVST mode:
stp vlan vlan-list bridge-diameter
diameter
Use one of the
commands.
The default setting is 7.
NOTE:
• In STP/RSTP/MSTP mode, each MST region is considered as a device and the configured
network diameter is effective only for the CIST (or the common root bridge), but not for MSTIs.
• In PVST mode, the network diameter configuration is effective on the root bridge only.
Configuring spanning tree timers
The following timers are used for spanning tree calculation:
• Forward delay
It is the delay time for port state transition. To prevent temporary loops on a network, the
spanning tree sets an intermediate port state, the learning state, before it transitions from the
discarding state to the forwarding state, and requires that the port transitions its state after a
forward delay timer to make sure that the state transition of the local port keeps synchronized
with the peer.
• Hello time
The device detects whether a link failure has occurred with the hello time interval. The spanning
tree sends a configuration BPDU every hello time interval. If the device receives no
configuration BPDUs within the hello time interval, it recalculates the spanning tree.
• Max age
In the CIST of an MSTP network or each VLAN of a PVST network, the device uses the max
age parameter to determine whether a configuration BPDU received by a port has expired. If a
port receives a configuration BPDU that has expired, that MSTI must be re-calculated. The max
age timer is ineffective for MSTIs.
To avoid frequent network changes, be sure that the settings of the hello time, forward delay
and max age timers meet the following formulas:
{ 2 × (forward delay – 1 second) ≥ max age
{ Max age ≥ 2 × (hello time + 1 second)
Hewlett Packard Enterprise does not recommend you to manually set the spanning tree timers.
Instead, you can specify the network diameter and let spanning tree protocols automatically

HP 3100 Series Specifications

General

Layer	Layer 2
Jumbo Frame Support	Yes
Switching Capacity	8.8 Gbps
MAC Address Table Size	8000 entries
Management	Web interface, SNMP, CLI
Operating Temperature	0 to 45°C (32 to 113°F)
Operating Humidity	10% to 90% non-condensing
Dimensions	44(H) x 440(W) x 173(D) mm

Summary

Configuring Ethernet Interfaces

Ethernet Interface Naming Conventions

Defines the naming format for HPE 3100 v2 EI Ethernet interfaces (A/B/C).

Configuring a Combo Interface

Explains how to configure logical interfaces comprising optical and electrical ports.

Configuring Basic Settings of an Ethernet Interface

Details how to set duplex modes (auto, full, half) and port speed for Ethernet interfaces.

Shutting Down an Ethernet Interface

Provides instructions on how to shut down an Ethernet interface or a group of interfaces.

Setting Speed Options for Auto Negotiation on an Ethernet Interface

Explains how to narrow down speed options for auto-negotiation on Ethernet interfaces.

Configuring Flow Control on an Ethernet Interface

Guides on enabling flow control to prevent packet drops and manage traffic congestion.

Configuring Loopback Testing on an Ethernet Interface

Details how to enable loopback testing to identify Ethernet interface problems.

Configuring Jumbo Frame Support

Explains how to enable support for processing frames larger than standard Ethernet frame size.

Configuring a Port Group

Describes how to assign multiple interfaces to a port group for bulk configuration.

Configuring Storm Suppression

Guides on setting thresholds for broadcast, multicast, or unicast traffic on interfaces.

Enabling Loopback Detection on an Ethernet Interface

Explains how to detect loops on an interface and configure protective actions.

Configuring the MAC Address Table

Overview

Introduces the MAC address table for forwarding frames via unicast to reduce flooding.

Types of MAC Address Table Entries

Describes the different types of entries: static, dynamic, and blackhole.

Configuring Static, Dynamic, and Blackhole MAC Address Table Entries

Provides steps to manually add MAC address entries for security and port binding.

Disabling MAC Address Learning

Explains how to disable MAC address learning to prevent table saturation.

MAC Address Table Configuration Example

Illustrates configuring static and blackhole MAC entries and setting aging timers.

Configuring Ethernet Link Aggregation

Overview

Explains Ethernet link aggregation benefits like increased bandwidth and link reliability.

Basic Concepts

Defines aggregation groups, member ports, aggregate interfaces, and states.

Aggregating Links in Static Mode

Details static link aggregation where LACP is disabled and manual maintenance is required.

Aggregating Links in Dynamic Mode

Explains dynamic link aggregation using LACP for automatic state maintenance.

Configuring an Aggregation Group

Guides on configuring static or dynamic aggregation groups and aggregate interfaces.

Configuring Load Sharing for Link Aggregation Groups

Describes how to configure load sharing criteria based on MAC or IP addresses.

Ethernet Link Aggregation Configuration Examples

Provides examples for static and dynamic link aggregation configurations.

Configuring Spanning Tree Protocols

STP

Introduces Spanning Tree Protocol (STP) for eliminating Layer 2 loops.

RSTP

Explains Rapid Spanning Tree Protocol (RSTP) for faster network convergence.

PVST

Details Per-VLAN Spanning Tree (PVST) for improving link bandwidth usage.

MSTP

Describes Multiple Spanning Tree Protocol (MSTP) overcoming STP/RSTP/PVST limitations.

Setting the Spanning Tree Mode

Guides on configuring the device to operate in STP, RSTP, MSTP, or PVST modes.

Configuring an MST Region

Explains how to configure MST region name, VLAN-to-instance mappings, and revision level.

Configuring the Root Bridge or a Secondary Root Bridge

Details how to specify the current device as the root or secondary root bridge.

Configuring the Device Priority

Explains how device priority affects spanning tree calculation and root bridge election.

Enabling BPDU Guard

Guides on enabling BPDU guard to protect against malicious BPDU attacks.

MSTP Configuration Example

Provides a practical example for configuring MSTP with VLAN-to-MSTI mapping.

Configuring VLANs

Overview

Introduces VLANs for segmenting LANs, reducing broadcasts, and improving security.

VLAN Fundamentals

Explains VLAN tag fields and the IEEE 802.1Q standard for VLAN identification.

VLAN Types

Covers VLAN implementation based on criteria like port, MAC address, or protocol.

Configuring Basic VLAN Settings

Guides on creating VLANs, naming them, and configuring descriptions.

Configuring Port-Based VLANs

Explains how to group VLAN members by port and configure port link types.

Configuring MAC-Based VLANs

Details assigning hosts to VLANs based on MAC addresses for secure network access.

Configuring Protocol-Based VLANs (available only on the HPE 3100 v2 EI)

Guides on assigning packets to VLANs based on protocol type and encapsulation format.

Displaying and Maintaining VLANs

Provides commands to display VLAN information, interfaces, and statistics.

Configuring a Voice VLAN (available only on the HPE 3100 v2 EI)

Overview

Explains voice VLAN configuration for prioritizing voice traffic and ensuring quality.

Methods of Identifying IP Phones

Describes identifying IP phones via OUI addresses or LLDP.

Configuring a Voice VLAN on a Port

Details voice VLAN assignment modes (automatic/manual) and port configurations.

Security Mode and Normal Mode of Voice VLANs

Compares security and normal modes for voice VLAN ports and their traffic handling.

Configuring a Port to Operate in Automatic Voice VLAN Assignment Mode

Guides on configuring automatic voice VLAN assignment for PCs and IP phones.

Configuring a Port to Operate in Manual Voice VLAN Assignment Mode

Explains manual voice VLAN assignment for ports handling only IP phone traffic.

Enabling LLDP to Automatically Discover IP Phones

Describes using LLDP to automatically discover IP phones and configure voice VLANs.

Voice VLAN Configuration Examples

Provides examples for automatic and manual voice VLAN configuration modes.

Configuring LLDP

Overview

Introduces LLDP for exchanging device information between directly connected devices.

Basic Concepts

Covers LLDP frame formats, LLDPDUs, TLVs, and working mechanisms.

LLDP Operating Modes

Details LLDP operational modes: TxRx, Tx, Rx, and Disable.

LLDP Configuration Task List

Lists tasks required for performing basic LLDP configuration and settings.

Performing Basic LLDP Configuration

Guides on enabling LLDP globally and on specific ports.

Configuring CDP Compatibility (available only on the HPE 3100 v2 EI)

Explains enabling CDP compatibility for Cisco IP phones to auto-configure voice VLANs.

Displaying and Maintaining LLDP

Provides commands to display global LLDP information and neighbor details.

LLDP Configuration Examples

Illustrates basic LLDP configuration for monitoring network links.

Configuring MVRP

Overview

Introduces Multiple Registration Protocol (MRP) and MVRP for VLAN configuration.

MRP Implementation

Explains how MRP participants register and deregister attribute values.

MRP Messages

Details MRP messages: Join, New, Leave, and LeaveAll for attribute exchange.

MVRP Registration Modes

Describes MVRP registration modes: Normal, Fixed, and Forbidden.

Enabling MVRP

Guides on enabling MVRP globally and on specific trunk ports.

Configuring the MVRP Registration Mode

Explains how to configure MVRP registration modes (fixed, forbidden, normal).

Displaying and Maintaining MVRP

Provides commands to display MVRP status, statistics, and VLAN information.

Configuration Example for MVRP in Normal Registration Mode

Illustrates MVRP configuration in normal registration mode between devices.