User`s guide
Table Of Contents
- Title
 - Notice
 - Contents
 - Figures
 - Tables
 - About This Guide
 - Introduction
 - Local Management Requirements
 - Accessing Local Management
- 3.1 Navigating Local Management Screens
 - 3.2 Password Screen
 - 3.3 Main Menu Screen
 - 3.4 Module Selection Screen
 - 3.5 Module Menu Screen
 - 3.6 Overview of Security Methods
 - 3.7 Security Menu Screen
 - 3.8 Passwords Screen
 - 3.9 Radius Configuration Screen
 - 3.10 Name Services Configuration Screen
 - 3.11 System Authentication Configuration Screen
 - 3.12 EAP (Port) Configuration Screen
 - 3.13 EAP Statistics Menu Screen
 - 3.14 MAC Port Configuration Screen
 - 3.15 MAC Supplicant Configuration Screen
 
 - Chassis Menu Screens
- 4.1 Chassis Menu Screen
 - 4.2 Chassis Configuration Screen
 - 4.3 SNMP Configuration Menu Screen
 - 4.4 SNMP Community Names Configuration Screen
 - 4.5 SNMP Traps Configuration Screen
 - 4.6 Chassis Environmental Information Screen
 - 4.7 Redirect Configuration Menu Screen (Chassis)
 - 4.8 Port Redirect Configuration Screen
 - 4.9 VLAN Redirect Configuration Screen
 
 - Module Configuration Menu Screens
- 5.1 Module Configuration Menu Screen
 - 5.2 General Configuration Screen
- 5.2.1 Setting the IP Address
 - 5.2.2 Setting the Subnet Mask
 - 5.2.3 Setting the Default Gateway
 - 5.2.4 Setting the TFTP Gateway IP Address
 - 5.2.5 Setting the Module Name
 - 5.2.6 Setting the Module Date
 - 5.2.7 Setting the Module Time
 - 5.2.8 Entering a New Screen Refresh Time
 - 5.2.9 Setting the Screen Lockout Time
 - 5.2.10 Configuring the COM Port
 - 5.2.11 Clearing NVRAM
 - 5.2.12 Enabling/Disabling IP Fragmentation
 
 - 5.3 SNMP Configuration Menu Screen
 - 5.4 SNMP Community Names Configuration Screen
 - 5.5 SNMP Traps Configuration Screen
 - 5.6 Access Control List Screen
 - 5.7 System Resources Information Screen
 - 5.8 FLASH Download Configuration Screen
 
 - Port Configuration Menu Screens
- 6.1 Port Configuration Menu Screen
 - 6.2 Ethernet Interface Configuration Screen
 - 6.3 Ethernet Port Configuration Screen
 - 6.4 HSIM/VHSIM Configuration Screen
 - 6.5 Redirect Configuration Menu Screen
 - 6.6 Port Redirect Configuration Screen
 - 6.7 VLAN Redirect Configuration Screen
 - 6.8 Link Aggregation Screen (802.3ad Main Menu Screen)
 - 6.9 Broadcast Suppression Configuration Screen
 
 - 802.1 Configuration Menu Screens
 - 802.1Q VLAN Configuration Menu Screens
- 8.1 Summary of VLAN Local Management
 - 8.2 802.1Q VLAN Configuration Menu Screen
 - 8.3 Static VLAN Configuration Screen
 - 8.4 Static VLAN Egress Configuration Screen
 - 8.5 Current VLAN Configuration Screen
 - 8.6 Current VLAN Egress Configuration Screen
 - 8.7 VLAN Port Configuration Screen
 - 8.8 VLAN Classification Configuration Screen
 - 8.9 Protocol Port Configuration Screen
 
 - 802.1p Configuration Menu Screens
- 9.1 802.1p Configuration Menu Screen
 - 9.2 Port Priority Configuration Screen
 - 9.3 Traffic Class Information Screen
 - 9.4 Traffic Class Configuration Screen
 - 9.5 Transmit Queues Configuration Screen
 - 9.6 Priority Classification Configuration Screen
 - 9.7 Protocol Port Configuration Screen
 - 9.8 Rate Limiting Configuration Screen
 
 - Layer 3 Extensions Menu Screens
 - Module Statistics Menu Screens
 - Network Tools Screens
 - VLAN Operation and Network Applications
- 13.1 Defining VLANs
 - 13.2 Types of VLANs
 - 13.3 Benefits and Restrictions
 - 13.4 VLAN Terms
 - 13.5 VLAN Operation
 - 13.6 Configuration Process
 - 13.7 VLAN Switch Operation
 - 13.8 VLAN Configuration
 - 13.9 Summary of VLAN Local Management
 - 13.10 Quick VLAN Walkthrough
 - 13.11 Examples
 - 13.12 Example 1, Single Switch Operation
 - 13.13 Example 2, VLANs Across Multiple Switches
 - 13.14 Example 3, Filtering Traffic According to a Layer 4 Classification Rule
 - 13.15 Example 4, Securing Sensitive Information According to Subnet
 - 13.16 Example 5, Using Dynamic Egress to Control Traffic
 - 13.17 Example 6, Locking a MAC Address to a Port Using Classification Rules
 
 - Generic Attribute Registration Protocol (GARP)
 - About IGMP
 - Index
 

Link Aggregation Screen (802.3ad Main Menu Screen)
Port Configuration Menu Screens 6-25
According to the IEEE 802.3ad standard, a port does not detach from an aggregator because of link 
loss. If a port is attached to an aggregator and the link is removed, the port’s mux machine will 
transition from COLLECTING to ATTACHED; however, it will remain attached to the same 
aggregator.
Ports that are attached to an aggregator will enter a Spanning Tree state of AGGREGATING on the 
Spanning Tree screens, just as they do when manually placed in a trunk.
In this implementation, the concept of an aggregator is for a non-aggregated port to attach to, 
although this aggregator doesn’t exist in any real sense. A port that is not a member of an 
aggregation will be displayed in LM as attached to a non-existent aggregation. If a port instance 
matches the aggregator instance it is attached to, that means it is not aggregating.
There are a few cases in which the 802.3ad implementation will disable a port’s ability to 
aggregate by clearing the aggregable bit ActorOperState:
• A port is attached to another port on this same switch (loopback). There is no available 
aggregator for 2 or more ports with the same LAGID. This can happen if either there are simply 
no available aggregators, or if none of the aggregators have a matching operational key and 
system priority.
• A port is in the same LAG as another port but is running at a slower speed. Ports running at 
different speeds are not allowed to aggregate according to 802.3ad.
There is a maximum of six aggregators per module.
Definitions to Know
Rapid Reconfiguration Spanning Tree
Rapid Reconfiguration is an enhancement to the legacy 802.1D Spanning Tree implementation, 
which implements a rapidly converging Spanning Tree algorithm that is event-driven instead of 
timer-driven.
Spanning Tree
When multiple links are connected from one switch to another, it is necessary that only one link be 
allowed to switch network traffic. Due to the functionality of a switch, if multiple links were 
active, a packet would end up “looping” around in those links indefinitely. This problem is well 
documented and is the reason that bridges implement the Spanning Tree Protocol (STP).
NOTE:  Ports running at half-duplex cannot aggregate.










