Dell Force10 MXL Blade - Page 593

Dell Force10 MXL Blade

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Spanning Tree Protocol (STP) | 591

Figure 33-12. STP Root Guard Prevents Bridging Loops

1

3

2

Port State:

STP Block

STP Root-Inconsistent

Table of Contents

Default Chapter3
- Table of Contents3
About this Guide25
- Objectives25
- Audience25
- Conventions26
- Information Symbols26
- Related Documents26
Configuration Fundamentals27
- Accessing the Command Line27
- CLI Modes28
  - Navigating CLI Modes29
- The Do Command31
- Undoing Commands32
- Obtaining Help33
- Entering and Editing Commands34
- Command History35
- Filtering Show Command Outputs35
- Multiple Users in Configuration Mode37
- Console Access39
Getting Started39
- Serial Console39
- External Serial Port with a USB Connector41
- Boot Process41
- Default Configuration44
- Configure a Host Name44
- Access the System Remotely44
  - Access the MXL Switch Remotely44
- Configure the Enable Password46
- Configuration File Management47
- File System Management51
- View the Command History52
- Upgrading and Downgrading FTOS52
  - Management53
4 Management53
- Configure Privilege Levels53
  - Create a Custom Privilege Level53
  - Apply a Privilege Level to a Terminal Line57
- Configure Logging57
- Log Messages in the Internal Buffer57
  - Configuration Task List for System Log Management57
- Disable System Logging58
- Send System Messages to a Syslog Server58
  - Configure a Unix System as a Syslog Server58
- Change System Logging Settings58
- Display the Logging Buffer and the Logging Configuration59
- Configure a UNIX Logging Facility Level61
- Synchronize Log Messages62
- Enable Timestamp on Syslog Messages63
- File Transfer Services63
  - Configuration Task List for File Transfer Services63
- Terminal Lines65
- Configure Login Authentication for Terminal Lines66
- Time out of EXEC Privilege Mode67
- Telnet to Another Network Device68
- Lock CONFIGURATION Mode68
  - Viewing the Configuration Lock Status69
- Recovering from a Forgotten Password70
  - Recovering from a Forgotten Enable Password70
- Recovering from a Failed Start71
Access Control Lists (Acls)73
- Overview73
- IP Access Control Lists (Acls)74
  - Implementing Acls on FTOS74
- IP Fragment Handling76
  - IP Fragments ACL Examples76
  - Layer 4 ACL Rules Examples77
- Configure a Standard IP ACL78
- Configuration Mode79
- Configure an Extended IP ACL80
- Assign an IP ACL to an Interface83
  - Counting ACL Hits84
- Configuring Layer 2 and Layer 3 Acls on an Interface83
- Configuring Ingress Acls85
- Configuring Egress Acls86
  - Egress Layer 3 ACL Lookup for Control-Plane IP Traffic86
- IP Prefix Lists87
  - Configuration Task List for Prefix Lists88
  - Implementation Information88
- ACL Resequencing92
  - Resequencing an ACL or Prefix List93
- Route Maps94
Bare Metal Provisioning (BMP)103
- Overview103
- Auto-Configuration105
Content Addressable Memory (CAM)111
- CAM Allocation111
- Test CAM Usage112
- View CAM-ACL Settings113
- CAM Optimization114
Data Center Bridging (DCB)115
- Ethernet Enhancements in Data Center Bridging115
- Enabling Data Center Bridging120
- Qos Dot1P Traffic Classification and Queue Assignment121
- Configuring Priority-Based Flow Control122
  - Configuring Lossless Queues124
  - Configuring the PFC Buffer in a Switch Stack125
- Configuring Enhanced Transmission Selection126
- Applying DCB Policies in a Switch Stack133
- Configuring DCBX Operation134
- Verifying DCB Configuration145
- PFC and ETS Configuration Examples155
Dynamic Host Configuration Protocol (DHCP)161
- Overview161
- DHCP Packet Format and Options162
- Assigning an IP Address Using DHCP163
- Configuration Tasks164
- Configure the System to be a DHCP Server164
- Implementation Information164
- Configure the System to be a Relay Agent169
- Configure the System to be a DHCP Client171
  - DHCP Client on a Management Interface177
  - DHCP Client Operation with Other Features178
- Configure Secure DHCP180
FIP Snooping189
- Fibre Channel over Ethernet189
- Ensuring Robustness in a Converged Ethernet Network189
- FIP Snooping on Ethernet Bridges191
- FIP Snooping in a Switch Stack193
- Configuring FIP Snooping193
- Displaying FIP Snooping Information197
- FIP Snooping Configuration Example204
GARP VLAN Registration Protocol (GVRP)207
- Important Points to Remember207
- Overview207
- Configuring GVRP208
- Related Configuration Tasks209
- Configuring GVRP Registration210
- Enabling GVRP Globally210
- Enabling GVRP on a Layer 2 Interface210
- Configuring a GARP Timer211
Internet Group Management Protocol (IGMP)213
- IGMP Version 2213
- Overview213
- IGMP Snooping217
- Designating a Multicast Router Interface220
- Fast Convergence after MSTP Topology Changes220
Interfaces221
- Basic Interface Configuration221
- Advanced Interface Configuration221
- Interface Types222
- View Basic Interface Information222
- Enable a Physical Interface225
- Physical Interfaces225
- VLAN Interfaces231
- Loopback Interfaces232
- Null Interfaces232
- Port Channel Interfaces233
- Bulk Configuration240
- Interface Range240
- Monitor and Maintain Interfaces245
  - Maintenance Using TDR246
- Splitting QSFP Ports to SFP+ Ports247
  - Important Points248
    - MTU Size on an Interface248
    - Layer 2 Flow Control Using Ethernet Pause Frames249
  - Enable Pause Frames249
- Configure MTU Size on an Interface250
- Port-Pipes251
- Auto-Negotiation on Ethernet Interfaces252
- View Advanced Interface Information255
Ipv4 Routing261
- IP Addresses261
  - Configuration Task List for IP Addresses262
- Directed Broadcast265
- Resolution of Host Names266
- Addess Resolution Protocol (ARP)268
  - Configuration Task List for ARP269
- ARP Learning Via Gratuitous ARP271
- ARP Learning Via ARP Request272
- Configurable ARP Retries272
- Internet Control Message Protocol (ICMP)273
  - Configuration Task List for ICMP273
    - Enable ICMP Unreachable Messages273
- UDP Helper274
- Configurations Using UDP Helper275
- Troubleshooting UDP Helper277
Iscsi Optimization279
- Iscsi Optimization Overview279
- Default Iscsi Optimization Values284
- Iscsi Optimization Prerequisites284
- Configuring Iscsi Optimization285
- Displaying Iscsi Optimization Information286
Link Aggregation Control Protocol (LACP)289
- Introduction to Dynamic Lags and LACP289
- LACP Configuration Tasks291
- Shared LAG State Tracking294
  - Configure Shared LAG State Tracking294
  - Important Points about Shared LAG State Tracking296
- LACP Basic Configuration Example296
Layer307
- Managing the MAC Address Table307
- MAC Learning Limit309
- Network Interface Controller (NIC) Teaming311
  - MAC Move Optimization312
Link Layer Discovery Protocol (LLDP)315
- Overview315
- Protocol Data Units315
- Optional Tlvs316
- TIA-1057 (LLDP-MED) Overview318
  - TIA Organizationally Specific Tlvs319
- Configuring LLDP322
  - LLDP Compatibility323
    - Related Configuration Tasks323
    - Important Points to Remember323
- CONFIGURATION Versus INTERFACE Configurations323
- Enabling LLDP324
  - Disabling and Undoing LLDP324
- Advertising Tlvs325
- Viewing the LLDP Configuration326
- Viewing Information Advertised by Adjacent LLDP Agents327
- Configuring LLDPDU Intervals329
- Configuring Transmit and Receive Mode330
- Configuring a Time to Live331
- Debugging LLDP332
- Relevant Management Objects333
Multiple Spanning Tree Protocol (MSTP)339
- Overview339
- Configure Multiple Spanning Tree Protocol340
  - Implementation Information340
  - Related Configuration Tasks340
- Create Multiple Spanning Tree Instances341
- Enable Multiple Spanning Tree Globally341
- Influence MSTP Root Selection342
- Interoperate with Non-FTOS Bridges343
- Flush MAC Addresses after a Topology Change348
- MSTP Sample Configurations348
- Debugging and Verifying an MSTP Configuration353
Open Shortest Path First (Ospfv2)357
- Overview357
- Autonomous System (AS) Areas358
- Area Types359
- Networks and Neighbors359
- Router Types359
- Implementing OSPF with FTOS364
- Sample Configurations for Ospfv2384
  - Basic Ospfv2 Router Topology384
Port Monitoring387
- Important Points to Remember387
- Port Monitoring388
- Configuring Port Monitoring390
Private Vlans (PVLAN)393
- Private VLAN Concepts394
- Private VLAN Commands395
- Private VLAN Configuration Task List396
Per-VLAN Spanning Tree Plus (PVST+)405
- Overview405
- Configuring Per-VLAN Spanning Tree Plus406
  - Implementation Information406
  - Related Configuration Tasks406
- Enable PVST407
  - Disable PVST407
  - Influence PVST+ Root Selection407
- Modify Global PVST+ Parameters409
- Enable BPDU Filtering Globally410
- Modify Interface PVST+ Parameters411
- Configure an Edgeport412
- PVST+ Extended System ID413
- PVST+ in Multi-Vendor Networks413
- Command Mode414
- PVST+ Sample Configurations415
Quality of Service (Qos)417
- Overview417
- Port-Based Qos Configurations419
- Policy-Based Qos Configurations422
- Qos Rate Adjustment432
- Strict-Priority Queueing433
- Weighted Random Early Detection433
25 Routing Information Protocol (RIP)437
- Implementation Information438
- Configuration Information438
  - Configuration Task List for RIP438
  - RIP Configuration Example446
Remote Monitoring (RMON)455
- Overview455
  - Implementation455
- Fault Recovery456
Rapid Spanning Tree Protocol (RSTP)463
- Overview463
- Configuring Rapid Spanning Tree463
  - Related Configuration Tasks463
- Configure Interfaces for Layer 2 Mode464
  - Important Points to Remember464
- Enable Rapid Spanning Tree Protocol Globally465
- Command Output467
- Add and Remove Interfaces468
- Modify Global Parameters468
- Enable BPDU Filtering Globally470
- Modify Interface Parameters470
- Configure an Edgeport471
- Influence RSTP Root Selection472
- SNMP Traps for Root Elections and Topology Changes473
- Fast Hellos for Link State Detection473
Security475
- AAA Accounting475
- AAA Authentication478
  - Configuration Task List for AAA Authentication478
- AAA Authorization481
  - Privilege Levels Overview481
    - Configure a Username and Password482
  - Configuration Task List for Privilege Levels482
- Radius486
  - RADIUS Authentication and Authorization487
  - Configuration Task List for RADIUS488
- Tacacs491
- Protection from TCP Tiny and Overlapping Fragment Attacks495
- Telnet502
- VTY Line and Access-Class Configuration502
Sflow507
- Overview507
- Implementation Information508
- Important Points to Remember508
- Enable and Disable Sflow509
  - Enable and Disable on an Interface509
- Sflow Show Commands509
- Polling Intervals511
- Specify Collectors511
- Sampling Rate512
  - Sub-Sampling512
- Back-Off Mechanism513
- Extended Sflow513
- Sflow on LAG Ports513
Simple Network Management Protocol (SNMP)517
- Protocol Overview517
- Implementation Information517
- Configure Simple Network Management Protocol517
- Setting up SNMP519
- Setting up User-Based Security (Snmpv3)520
- Read Managed Object Values522
- Write Managed Object Values523
- Configure Contact and Location Information Using SNMP523
- Subscribe to Managed Object Value Updates Using SNMP524
- Copy Configuration Files Using SNMP527
- Manage Vlans Using SNMP533
- Enable and Disable a Port Using SNMP538
- Fetch Dynamic MAC Entries Using SNMP538
- Deriving Interface Indices540
- Monitor Port-Channels541
- BMP Functionality Using SNMP SET542
- Entity MIBS543
- Troubleshooting SNMP Operations546
Stacking547
- Overview547
- Stacking MXL 10/40Gbe Switches547
- Configuring a Switch Stack553
- Stack Group/Port Numbers553
- Verifying a Stack Configuration562
  - Using Leds562
  - Using Show Commands562
- Troubleshooting a Switch Stack567
  - Troubleshooting Commands567
  - Failure Scenarios569
- Upgrading a Switch Stack573
- Upgrading a Single Stack Unit574
Storm Control577
- Configuring Storm Control577
  - Configuring Storm Control from INTERFACE Mode577
  - Configuring Storm Control from CONFIGURATION Mode577
- Overview577
Spanning Tree Protocol (STP)579
- Overview579
- Configuring Spanning Tree580
  - Important Points to Remember580
  - Related Configuration Tasks580
- Configuring Interfaces for Layer 2 Mode581
- Enabling Spanning Tree Protocol Globally582
- Adding an Interface to the Spanning Tree Group584
- Removing an Interface from the Spanning Tree Group584
- Modifying Global Parameters585
- Enabling Portfast586
  - Preventing Network Disruptions with BPDU Guard587
- Modifying Interface STP Parameters586
- BPDU Filtering589
- STP Root Guard591
- STP Root Selection591
- Displaying STP Guard Configuration595
System Time and Date597
- Network Time Protocol597
- FTOS Time and Date605
  - Configuring Time and Date Settings605
  - Set Daylight Savings Time607
    - Set Daylight Saving Time Once607
    - Set Recurring Daylight Saving Time608
Uplink Failure Detection (UFD)611
- Feature Description611
- How Uplink Failure Detection Works612
- UFD and NIC Teaming613
- Important Points to Remember614
- Configuring Uplink Failure Detection615
- Clearing a UFD-Disabled Interface616
- Displaying Uplink Failure Detection618
  - Show Interfaces620
  - Show Configuration620
- Sample Configuration: Uplink Failure Detection621
Upgrade Procedures623
- Find the Upgrade Procedures623
- Get Help with Upgrades623
Virtual Lans (VLAN)625
- Default VLAN626
- Port-Based Vlans627
- Vlans and Port Tagging627
- Enable Null VLAN as the Default VLAN633
Virtual Router Redundancy Protocol (VRRP)635
- Overview635
- VRRP Benefits637
- VRRP Implementation637
- VRRP Configuration638
  - Configuration Task List for VRRP638
  - VRRP Initialization Delay647
- Sample Configurations648
  - VRRP for Ipv4 Configuration648
Debugging and Diagnostics651
- Offline Diagnostics651
  - Running Offline Diagnostics652
  - Important Points to Remember652
- Trace Logs653
  - Auto Save on Crash or Rollover653
- Show Hardware Commands653
- Environmental Monitoring654
- Buffer Tuning658
- Troubleshooting Packet Loss664
- Application Core Dumps669
- Mini Core Dumps669
- TCP Dumps671
Standards Compliance673
- IEEE Compliance673
- RFC and I-D Compliance674
- MIB Location682
Index683

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