Name: Dell S4820T
Brand: Dell
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Related Documents

For more information about the Dell Networking switches, refer to the following documents:

• Dell Networking OS Command Reference

• Installing the System

• Dell Quick Start Guide

• Dell Networking OS Release Notes

About this Guide

Default Chapter3
- Table of Contents3
1 About this Guide36
- Audience36
- Conventions36
- Related Documents37
2 Configuration Fundamentals38
- Accessing the Command Line38
- CLI Modes38
  - Navigating CLI Modes40
- The Do Command44
- Undoing Commands45
- Obtaining Help45
- Entering and Editing Commands46
- Command History47
- Filtering Show Command Outputs47
- Multiple Users in Configuration Mode49
3 Getting Started50
- Console Access50
  - Serial Console50
- Accessing the CLI Interface and Running Scripts Using SSH51
  - Entering CLI Commands Using an SSH Connection52
  - Executing Local CLI Scripts Using an SSH Connection52
- Default Configuration53
- Configuring a Host Name53
- Accessing the System Remotely53
- Configuring the Enable Password55
- Configuration File Management55
- Managing the File System60
- Enabling Software Features on Devices Using a Command Option61
- View Command History62
- Upgrading Dell Networking os62
- Using HTTP for File Transfers62
- Using Hashes to Validate Software Images63
4 Management65
- Configuring Privilege Levels65
  - Creating a Custom Privilege Level65
  - Removing a Command from EXEC Mode65
  - Moving a Command from EXEC Privilege Mode to EXEC Mode66
  - Allowing Access to CONFIGURATION Mode Commands66
  - Allowing Access to the Following Modes66
  - Applying a Privilege Level to a Username68
  - Applying a Privilege Level to a Terminal Line68
- Configuring Logging68
  - Audit and Security Logs69
  - Configuring Logging Format71
  - Display the Logging Buffer and the Logging Configuration71
  - Setting up a Secure Connection to a Syslog Server73
- Log Messages in the Internal Buffer74
  - Configuration Task List for System Log Management74
- Disabling System Logging74
- Sending System Messages to a Syslog Server75
  - Configuring a UNIX System as a Syslog Server75
- Track Login Activity75
  - Restrictions for Tracking Login Activity75
  - Configuring Login Activity Tracking76
  - Display Login Statistics76
- Limit Concurrent Login Sessions77
  - Restrictions for Limiting the Number of Concurrent Sessions77
  - Configuring Concurrent Session Limit77
  - Enabling the System to Clear Existing Sessions78
- Changing System Logging Settings79
- Display the Logging Buffer and the Logging Configuration80
- Configuring a UNIX Logging Facility Level80
- Synchronizing Log Messages82
- Enabling Timestamp on Syslog Messages82
- File Transfer Services83
  - Configuration Task List for File Transfer Services83
  - Enabling the FTP Server83
  - Configuring FTP Server Parameters84
  - Configuring FTP Client Parameters84
- Terminal Lines85
  - Denying and Permitting Access to a Terminal Line85
  - Configuring Login Authentication for Terminal Lines86
- Setting Time out of EXEC Privilege Mode87
- Using Telnet to Get to Another Network Device88
- Lock CONFIGURATION Mode89
  - Viewing the Configuration Lock Status89
- Recovering from a Forgotten Password90
  - Recovering from a Forgotten Enable Password91
- Recovering from a Failed Start91
- Restoring the Factory Default Settings92
  - Important Points to Remember92
  - Restoring Factory Default Environment Variables93
802.1Ag95
- Ethernet CFM95
- Maintenance Domains96
- Maintenance Points96
- Maintenance End Points97
- Implementation Information98
- Configuring the CFM98
  - Related Configuration Tasks98
- Enabling Ethernet CFM99
- Creating a Maintenance Domain99
- Creating a Maintenance Association100
- Create Maintenance Points100
- Continuity Check Messages102
  - Enabling CCM103
  - Enabling Cross-Checking104
- Sending Loopback Messages and Responses104
- Sending Linktrace Messages and Responses104
  - Caching Link Trace105
- Enabling CFM SNMP Traps106
- Displaying Ethernet CFM Statistics107
802.1X110
- The Port-Authentication Process110
  - EAP over RADIUS112
- Configuring 802.1X112
  - Related Configuration Tasks112
- Important Points to Remember113
- Enabling 802.1X114
- Configuring Request Identity Re-Transmissions115
  - Configuring a Quiet Period after a Failed Authentication116
- Forcibly Authorizing or Unauthorizing a Port117
- Re-Authenticating a Port118
- Configuring Timeouts119
- Configuring Dynamic VLAN Assignment with Port Authentication120
- Guest and Authentication-Fail Vlans121
  - Configuring a Guest VLAN122
  - Configuring an Authentication-Fail VLAN122
7 Access Control List (ACL) VLAN Groups and Content Addressable Memory (CAM)124
- Optimizing CAM Utilization During the Attachment of Acls to Vlans124
- Guidelines for Configuring ACL VLAN Groups125
- Configuring ACL VLAN Groups and Configuring FP Blocks for VLAN Parameters126
  - Configuring ACL VLAN Groups126
  - Configuring FP Blocks for VLAN Parameters127
- Viewing CAM Usage128
- Allocating FP Blocks for VLAN Processes129
8 Access Control Lists (Acls)130
- IP Access Control Lists (Acls)131
  - CAM Usage132
  - Implementing Acls on Dell Networking os133
- IP Fragment Handling134
  - IP Fragments ACL Examples134
  - Layer 4 ACL Rules Examples135
- Configure a Standard IP ACL136
  - Configuring a Standard IP ACL Filter137
- Configure an Extended IP ACL138
  - Configuring Filters with a Sequence Number138
  - Configuring Filters Without a Sequence Number140
- Configure Layer 2 and Layer 3 Acls141
- Assign an IP ACL to an Interface141
- Applying an IP ACL142
  - Counting ACL Hits143
- Configure Ingress Acls143
- Configure Egress Acls144
  - Applying Egress Layer 3 Acls (Control-Plane)145
- IP Prefix Lists145
  - Implementation Information146
  - Configuration Task List for Prefix Lists146
- ACL Resequencing150
  - Resequencing an ACL or Prefix List151
- Route Maps152
  - Implementation Information153
- Important Points to Remember153
- Logging of ACL Processes160
  - Guidelines for Configuring ACL Logging161
  - Configuring ACL Logging161
- Flow-Based Monitoring Support for Acls162
  - Behavior of Flow-Based Monitoring163
  - Enabling Flow-Based Monitoring164
9 Bidirectional Forwarding Detection (BFD)166
- How BFD Works166
- Important Points to Remember171
- Configure BFD171
10 Border Gateway Protocol Ipv4 (Bgpv4)197
- Autonomous Systems (AS)197
- Sessions and Peers199
  - Establish a Session200
- Route Reflectors201
- BGP Attributes202
- Multiprotocol BGP208
- Implement BGP with Dell Networking os208
- Configuration Information215
- BGP Configuration215
11 Content Addressable Memory (CAM)263
- CAM Allocation263
- Test CAM Usage265
- View CAM Profiles266
- View CAM-ACL Settings266
- View CAM Usage268
- CAM Optimization269
- Troubleshoot CAM Profiling269
  - CAM Profile Mismatches269
  - Qos CAM Region Limitation269
12 Control Plane Policing (Copp)271
- Configure Control Plane Policing272
13 Data Center Bridging (DCB)283
- Ethernet Enhancements in Data Center Bridging283
- Priority-Based Flow Control284
- Enhanced Transmission Selection285
- Data Center Bridging Exchange Protocol (Dcbx)286
- Data Center Bridging in a Traffic Flow287
- Enabling Data Center Bridging287
  - DCB Maps and Its Attributes288
- Data Center Bridging: Default Configuration289
- Configuring Priority-Based Flow Control290
  - Configuring Lossless Queues291
- Configuring PFC in a DCB Map292
  - PFC Configuration Notes292
  - PFC Prerequisites and Restrictions293
- Applying a DCB Map on a Port294
- Configuring PFC Without a DCB Map294
  - Configuring Lossless Queuesexample295
- Priority-Based Flow Control Using Dynamic Buffer Method296
  - Pause and Resume of Traffic297
  - Buffer Sizes for Lossless or PFC Packets297
- Behavior of Tagged Packets298
- Configuration Example for DSCP and PFC Priorities298
- Using PFC to Manage Converged Ethernet Traffic299
- Configure Enhanced Transmission Selection299
  - ETS Prerequisites and Restrictions300
  - Creating an ETS Priority Group300
  - ETS Operation with Dcbx301
  - Configuring Bandwidth Allocation for Dcbx CIN302
  - Configuring ETS in a DCB Map303
- Hierarchical Scheduling in ETS Output Policies304
- Using ETS to Manage Converged Ethernet Traffic305
- Applying DCB Policies in a Switch Stack305
- Configure a Dcbx Operation306
  - Dcbx Operation306
  - Dcbx Port Roles306
  - DCB Configuration Exchange308
  - Configuration Source Election308
  - Propagation of DCB Information309
  - Auto-Detection and Manual Configuration of the Dcbx Version309
  - Dcbx Example310
  - Dcbx Prerequisites and Restrictions311
  - Configuring Dcbx311
- Verifying the DCB Configuration315
- Sample DCB Configuration326
  - PFC and ETS Configuration Command Examples328
  - Qos Dot1P Traffic Classification and Queue Assignment328
  - Configuring the Dynamic Buffer Method330
14 Dynamic Host Configuration Protocol (DHCP)332
- DHCP Packet Format and Options332
- Assign an IP Address Using DHCP334
- Implementation Information335
- Configure the System to be a DHCP Server336
- Configure the System to be a Relay Agent340
- Configure the System to be a DHCP Client342
  - DHCP Client Operation with Other Features342
  - DHCP Client on a Management Interface343
- Configure the System for User Port Stacking (Option 230)344
- Configure Secure DHCP344
- Source Address Validation352
15 Equal Cost Multi-Path (ECMP)355
- ECMP for Flow-Based Affinity355
- Link Bundle Monitoring356
16 Fcoe Transit360
- Fibre Channel over Ethernet360
- Ensure Robustness in a Converged Ethernet Network360
- FIP Snooping on Ethernet Bridges362
- FIP Snooping in a Switch Stack364
- Using FIP Snooping364
- Displaying FIP Snooping Information369
- Fcoe Transit Configuration Example375
17 FIPS Cryptography377
- Configuration Tasks377
- Preparing the System377
- Enabling FIPS Mode378
- Generating Host-Keys378
- Monitoring FIPS Mode Status379
- Disabling FIPS Mode379
18 Force10 Resilient Ring Protocol (FRRP)381
- Protocol Overview381
- Implementing FRRP385
- FRRP Configuration385
- Troubleshooting FRRP390
  - Configuration Checks390
- Sample Configuration and Topology390
19 GARP VLAN Registration Protocol (GVRP)392
- Important Points to Remember392
- Configure GVRP393
  - Related Configuration Tasks394
- Enabling GVRP Globally394
- Enabling GVRP on a Layer 2 Interface394
- Configure GVRP Registration395
- Configure a GARP Timer395
- RPM Redundancy396
20 High Availability (HA)397
- Component Redundancy397
- Online Insertion and Removal402
  - RPM Online Insertion and Removal402
  - Linecard Online Insertion and Removal403
- Hitless Behavior404
- Graceful Restart404
- Software Resiliency405
- Hot-Lock Behavior406
- Process Restartability406
  - Enabling Process Restartability407
21 Internet Group Management Protocol (IGMP)408
- IGMP Implementation Information408
- IGMP Protocol Overview408
  - IGMP Version 2408
  - IGMP Version 3410
- Configure IGMP413
  - Related Configuration Tasks413
- Viewing IGMP Enabled Interfaces414
- Selecting an IGMP Version414
- Viewing IGMP Groups415
- Adjusting Timers415
  - Adjusting Query and Response Timers415
- Enabling IGMP Immediate-Leave416
- IGMP Snooping416
- Fast Convergence after MSTP Topology Changes419
- Egress Interface Selection (EIS) for HTTP and IGMP Applications419
- Designating a Multicast Router Interface428
22 Interfaces429
- Basic Interface Configuration429
- Advanced Interface Configuration429
- Interface Types430
- View Basic Interface Information430
- Enabling a Physical Interface432
- Physical Interfaces432
  - Configuration Task List for Physical Interfaces433
  - Overview of Layer Modes433
  - Configuring Layer 2 (Data Link) Mode434
  - Configuring Layer 2 (Interface) Mode434
  - Configuring Layer 3 (Network) Mode434
  - Configuring Layer 3 (Interface) Mode435
- Egress Interface Selection (EIS)436
  - Important Points to Remember436
  - Configuring EIS436
- Management Interfaces437
  - Configuring Management Interfaces437
  - Configuring Management Interfaces on the S-Series439
- VLAN Interfaces440
- Loopback Interfaces440
- Null Interfaces441
- Port Channel Interfaces441
  - Port Channel Definition and Standards442
  - Port Channel Benefits442
  - Port Channel Implementation442
  - 10/100/1000 Mbps Interfaces in Port Channels443
  - Configuration Tasks for Port Channel Interfaces443
  - Creating a Port Channel444
  - Adding a Physical Interface to a Port Channel444
  - Reassigning an Interface to a New Port Channel446
  - Configuring the Minimum Oper up Links in a Port Channel447
  - Assigning an IP Address to a Port Channel448
  - Deleting or Disabling a Port Channel448
  - Load Balancing through Port Channels448
  - Load-Balancing Method449
  - Changing the Hash Algorithm449
- Bulk Configuration451
  - Interface Range451
  - Bulk Configuration Examples451
- Defining Interface Range Macros453
  - Define the Interface Range453
  - Choosing an Interface-Range Macro453
- Monitoring and Maintaining Interfaces454
  - Maintenance Using TDR455
- Splitting QSFP Ports to SFP+ Ports456
- Converting a QSFP or QSFP+ Port to an SFP or SFP+ Port456
  - Important Points to Remember457
  - Example Scenarios457
- Link Dampening462
  - Important Points to Remember462
  - Enabling Link Dampening462
- Link Bundle Monitoring464
- Using Ethernet Pause Frames for Flow Control464
  - Enabling Pause Frames465
- Configure the MTU Size on an Interface466
- Port-Pipes467
- Auto-Negotiation on Ethernet Interfaces467
  - Setting the Speed and Duplex Mode of Ethernet Interfaces467
  - Set Auto-Negotiation Options469
- View Advanced Interface Information470
  - Configuring the Interface Sampling Size471
- Dynamic Counters472
  - Clearing Interface Counters472
- Enhanced Validation of Interface Ranges473
- Compressing Configuration Files473
23 Internet Protocol Security (Ipsec)477
- Configuring Ipsec478
24 Ipv4 Routing479
- IP Addresses479
  - Implementation Information479
- Configuration Tasks for IP Addresses480
- Assigning IP Addresses to an Interface480
- Configuring Static Routes481
- Configure Static Routes for the Management Interface483
- Ipv4 Path MTU Discovery Overview483
- Using the Configured Source IP Address in ICMP Messages484
  - Configuring the ICMP Source Interface484
- Configuring the Duration to Establish a TCP Connection485
- Enabling Directed Broadcast485
- Resolution of Host Names486
- Enabling Dynamic Resolution of Host Names486
- Specifying the Local System Domain and a List of Domains487
- Configuring DNS with Traceroute487
- Arp488
- Configuration Tasks for ARP488
- Configuring Static ARP Entries489
- Enabling Proxy ARP489
- Clearing ARP Cache490
- ARP Learning Via Gratuitous ARP490
- Enabling ARP Learning Via Gratuitous ARP491
- ARP Learning Via ARP Request491
- Configuring ARP Retries492
- Icmp493
- Configuration Tasks for ICMP493
- Enabling ICMP Unreachable Messages493
- UDP Helper493
  - Configure UDP Helper493
  - Important Points to Remember494
- Enabling UDP Helper494
- Configuring a Broadcast Address494
- Configurations Using UDP Helper495
- UDP Helper with Broadcast-All Addresses495
- UDP Helper with Subnet Broadcast Addresses496
- UDP Helper with Configured Broadcast Addresses497
- UDP Helper with no Configured Broadcast Addresses497
- Troubleshooting UDP Helper498
25 Ipv6 Routing499
- Protocol Overview499
- Implementing Ipv6 with Dell Networking os505
- Icmpv6507
- Path MTU Discovery508
- Ipv6 Neighbor Discovery508
  - Ipv6 Neighbor Discovery of MTU Packets509
- Configuration Task List for Ipv6 RDNSS509
- Secure Shell (SSH) over an Ipv6 Transport512
- Configuration Tasks for Ipv6512
- Configuring Ipv6 RA Guard518
  - Configuring Ipv6 RA Guard on an Interface520
  - Monitoring Ipv6 RA Guard521
26 Iscsi Optimization522
- Iscsi Optimization Overview522
- Default Iscsi Optimization Values528
- Iscsi Optimization Prerequisites529
- Configuring Iscsi Optimization529
- Displaying Iscsi Optimization Information531
27 Intermediate System to Intermediate System533
- IS-IS Protocol Overview533
- IS-IS Addressing533
- Multi-Topology IS-IS534
- Graceful Restart535
  - Timers536
- Implementation Information536
- Configuration Information537
- IS-IS Metric Styles554
- Configure Metric Values554
- Sample Configurations557
28 Link Aggregation Control Protocol (LACP)560
- Introduction to Dynamic Lags and LACP560
- LACP Configuration Tasks562
- Shared LAG State Tracking564
  - Configuring Shared LAG State Tracking565
  - Important Points about Shared LAG State Tracking566
- LACP Basic Configuration Example567
  - Configure a LAG on ALPHA567
29 Layer 2575
- Manage the MAC Address Table575
- MAC Learning Limit576
- NIC Teaming580
- Configure Redundant Pairs582
  - Important Points about Configuring Redundant Pairs583
- Far-End Failure Detection585
30 Link Layer Discovery Protocol (LLDP)590
- 802.1AB (LLDP) Overview590
  - Protocol Data Units590
- Optional Tlvs591
  - Management Tlvs592
- TIA-1057 (LLDP-MED) Overview594
  - TIA Organizationally Specific Tlvs594
- Configure LLDP599
- CONFIGURATION Versus INTERFACE Configurations599
- Enabling LLDP600
  - Disabling and Undoing LLDP600
- Advertising Tlvs600
- Viewing the LLDP Configuration602
- Viewing Information Advertised by Adjacent LLDP Agents603
- Configuring LLDPDU Intervals604
- Configuring Transmit and Receive Mode604
- Configuring a Time to Live605
- Debugging LLDP606
- Relevant Management Objects607
31 Microsoft Network Load Balancing614
- NLB Unicast Mode Scenario614
- NLB Multicast Mode Scenario615
- Limitations of the NLB Feature615
- Microsoft Clustering615
- Enable and Disable VLAN Flooding616
- Configuring a Switch for NLB616
32 Multicast Source Discovery Protocol (MSDP)618
- Protocol Overview618
- Anycast RP620
- Implementation Information620
- Configure Multicast Source Discovery Protocol620
  - Related Configuration Tasks621
- Enable MSDP625
- Manage the Source-Active Cache626
- Accept Source-Active Messages that Fail the RFP Check627
- Specifying Source-Active Messages631
- Limiting the Source-Active Messages from a Peer632
- Preventing MSDP from Caching a Local Source632
- Preventing MSDP from Caching a Remote Source633
- Preventing MSDP from Advertising a Local Source634
- Logging Changes in Peership States635
- Terminating a Peership635
- Clearing Peer Statistics636
- Debugging MSDP636
- MSDP with Anycast RP637
- Configuring Anycast RP638
  - Reducing Source-Active Message Flooding639
  - Specifying the RP Address Used in SA Messages639
- MSDP Sample Configurations642
33 Multiple Spanning Tree Protocol (MSTP)646
- Protocol Overview646
- Spanning Tree Variations647
  - Implementation Information647
- Configure Multiple Spanning Tree Protocol647
  - Related Configuration Tasks647
- Enable Multiple Spanning Tree Globally648
- Adding and Removing Interfaces648
- Creating Multiple Spanning Tree Instances649
- Influencing MSTP Root Selection650
- Interoperate with Non-Dell Networking os Bridges651
- Changing the Region Name or Revision651
- Modifying Global Parameters652
- Modifying the Interface Parameters653
- Configuring an Edgeport654
- Flush MAC Addresses after a Topology Change655
- MSTP Sample Configurations655
  - Router 1 Running-Configurationrouter 2 Running-Configurationrouter 3 Running-Configurationsftos Example Running-Configuration656
- Debugging and Verifying MSTP Configurations659
34 Multicast Features662
- Enabling IP Multicast662
- Implementation Information662
- Multicast Policies663
  - Ipv4 Multicast Policies663
35 Object Tracking671
- Object Tracking Overview671
- Object Tracking Configuration674
- Displaying Tracked Objects681
36 Open Shortest Path First (Ospfv2 and Ospfv3)684
- Protocol Overview684
- OSPF with Dell Networking os691
- Configuration Information695
  - Configuration Task List for Ospfv2 (OSPF for Ipv4)695
- Sample Configurations for Ospfv2710
- Configuration Task List for Ospfv3 (OSPF for Ipv6)712
37 Policy-Based Routing (PBR)728
- Overview728
- Implementing Policy-Based Routing with Dell Networking os729
- Configuration Task List for Policy-Based Routing730
  - PBR Exceptions (Permit)730
- Create a Redirect List731
- Create a Rule for a Redirect-List731
- Apply a Redirect-List to an Interface Using a Redirect-Group733
  - Show Redirect List Configuration734
- Sample Configuration735
  - Redirect-List GOLD736
38 PIM Sparse-Mode (PIM-SM)740
- Implementation Information740
- Protocol Overview740
- Configuring PIM-SM742
  - Related Configuration Tasks742
- Enable PIM-SM742
- Configuring S,G Expiry Timers743
- Configuring a Static Rendezvous Point744
  - Overriding Bootstrap Router Updates745
- Configuring a Designated Router745
- Creating Multicast Boundaries and Domains746
39 PIM Source-Specific Mode (PIM-SSM)747
- Implementation Information747
  - Important Points to Remember747
- Configure PIM-SMM748
  - Related Configuration Tasks748
- Enabling PIM-SSM748
- Use PIM-SSM with IGMP Version 2 Hosts748
  - Configuring PIM-SSM with Igmpv2749
40 Port Monitoring752
- Important Points to Remember752
- Port Monitoring753
- Configuring Port Monitoring754
- Enabling Flow-Based Monitoring756
- Remote Port Mirroring757
- Configuring the Encapsulated Remote Port Mirroring764
  - Changes to Default Behaviorconfiguration Steps for ERPM764
- ERPM Behavior on a Typical Dell Networking os766
  - Decapsulation of ERPM Packets at the Destination IP/ Analyzer766
41 Private Vlans (PVLAN)768
- Private VLAN Concepts768
- Using the Private VLAN Commands769
- Configuration Task List770
- Private VLAN Configuration Example774
- Inspecting the Private VLAN Configuration775
42 Per-VLAN Spanning Tree Plus (PVST+)778
- Protocol Overview778
- Implementation Information779
- Configure Per-VLAN Spanning Tree Plus779
  - Related Configuration Tasks779
- Enabling PVST780
- Disabling PVST780
- Influencing PVST+ Root Selection780
- Modifying Global PVST+ Parameters782
- Modifying Interface PVST+ Parameters783
- Configuring an Edgeport784
- PVST+ in Multi-Vendor Networks785
- Enabling PVST+ Extend System ID785
- PVST+ Sample Configurations786
43 Quality of Service (Qos)788
- Implementation Information790
- Port-Based Qos Configurations791
- Policy-Based Qos Configurations794
- Enabling Qos Rate Adjustment807
- Enabling Strict-Priority Queueing807
- Weighted Random Early Detection808
- Pre-Calculating Available Qos CAM Space811
- Configuring Weights and ECN for WRED812
  - Global Service Pools with WRED and ECN Settings813
- Configuring WRED and ECN Attributes814
- Guidelines for Configuring ECN for Classifying and Color-Marking Packets815
- Enabling Buffer Statistics Tracking821
44 Routing Information Protocol (RIP)824
- Protocol Overview824
  - Ripv1824
  - Ripv2825
- Implementation Information825
- Configuration Information825
  - Configuration Task List825
  - RIP Configuration Example833
45 Remote Monitoring (RMON)839
- Implementation Information839
- Fault Recovery839
46 Rapid Spanning Tree Protocol (RSTP)844
- Protocol Overview844
- Configuring Rapid Spanning Tree844
  - Related Configuration Tasks844
- Important Points to Remember845
  - RSTP and VLT845
- Configuring Interfaces for Layer 2 Mode845
- Enabling Rapid Spanning Tree Protocol Globally846
- Adding and Removing Interfaces848
- Modifying Global Parameters849
  - Enabling SNMP Traps for Root Elections and Topology Changes850
- Modifying Interface Parameters850
- Enabling SNMP Traps for Root Elections and Topology Changes851
- Influencing RSTP Root Selection851
- Configuring an Edgeport851
- Configuring Fast Hellos for Link State Detection852
47 Software-Defined Networking (SDN)854
48 Security855
- AAA Accounting855
  - Configuration Task List for AAA Accounting855
- AAA Authentication857
  - Configuration Task List for AAA Authentication858
- Obscuring Passwords and Keys860
- AAA Authorization861
  - Privilege Levels Overview861
  - Configuration Task List for Privilege Levels862
- Radius867
  - RADIUS Authentication867
  - Configuration Task List for RADIUS868
- Tacacs871
- Protection from TCP Tiny and Overlapping Fragment Attacks875
- Enabling SCP and SSH875
- Telnet882
- VTY Line and Access-Class Configuration882
- Role-Based Access Control884
49 Service Provider Bridging898
- VLAN Stacking898
- VLAN Stacking Packet Drop Precedence907
- Dynamic Mode Cos for VLAN Stacking909
  - Mapping C-Tag to S-Tag Dot1P Values910
- Layer 2 Protocol Tunneling911
- Provider Backbone Bridging915
50 Sflow916
- Overview916
- Implementation Information916
  - Important Points to Remember917
- Enabling Extended Sflow917
- Enabling and Disabling Sflow on an Interface918
- Enabling Sflow Max-Header Size Extended918
- Sflow Show Commands920
- Configuring Specify Collectors921
- Changing the Polling Intervals922
- Back-Off Mechanism922
- Sflow on LAG Ports922
- Enabling Extended Sflow922
  - Important Points to Remember923
51 Simple Network Management Protocol (SNMP)925
- Protocol Overview925
- Implementation Information925
- Snmpv3 Compliance with FIPS925
- Configuration Task List for SNMP927
  - Related Configuration Tasks927
- Important Points to Remember927
- Set up SNMP927
  - Creating a Community928
  - Setting up User-Based Security (Snmpv3)928
- Reading Managed Object Values930
- Writing Managed Object Values930
- Configuring Contact and Location Information Using SNMP931
- Subscribing to Managed Object Value Updates Using SNMP932
- Enabling a Subset of SNMP Traps933
- Enabling an SNMP Agent to Notify Syslog Server Failure935
- Copy Configuration Files Using SNMP936
  - Copying a Configuration File938
  - Copying Configuration Files Via SNMP939
  - Copying the Startup-Config Files to the Running-Config939
  - Copying the Startup-Config Files to the Server Via FTP940
  - Copying the Startup-Config Files to the Server Via TFTP940
  - Copy a Binary File to the Startup-Configuration941
  - Additional MIB Objects to View Copy Statistics941
  - Obtaining a Value for MIB Objects942
- MIB Support to Display the Available Memory Size on Flash943
  - Viewing the Available Flash Memory Size943
- MIB Support to Display the Software Core Files Generated by the System943
  - Viewing the Software Core Files Generated by the System944
- Manage Vlans Using SNMP944
  - Creating a VLAN945
  - Assigning a VLAN Alias945
  - Displaying the Ports in a VLAN945
  - Add Tagged and Untagged Ports to a VLAN947
- Managing Overload on Startup948
- Enabling and Disabling a Port Using SNMP948
- Fetch Dynamic MAC Entries Using SNMP949
- Deriving Interface Indices950
- Monitor Port-Channels951
- Troubleshooting SNMP Operation953
52 Stacking954
- S-Series Stacking Overview954
- Important Points to Remember960
- S-Series Stacking Installation Tasks961
- S-Series Stacking Configuration Tasks968
- Verify a Stack Configuration973
  - Displaying the Status of Stacking Ports973
- Remove Units or Front End Ports from a Stack975
  - Removing a Unit from an S-Series Stack975
  - Removing Front End Port Stacking975
- Troubleshoot an S-Series Stack976
53 Storm Control980
- Configure Storm Control980
  - Configuring Storm Control from INTERFACE Mode980
  - Configuring Storm Control from CONFIGURATION Mode980
54 Spanning Tree Protocol (STP)982
- Protocol Overview982
- Configure Spanning Tree982
  - Related Configuration Tasks982
- Important Points to Remember983
- Configuring Interfaces for Layer 2 Mode984
- Enabling Spanning Tree Protocol Globally985
- Adding an Interface to the Spanning Tree Group987
- Modifying Global Parameters988
- Modifying Interface STP Parameters989
- Enabling Portfast990
  - Prevent Network Disruptions with BPDU Guard990
- Selecting STP Root993
- STP Root Guard993
  - Root Guard Scenario994
  - Configuring Root Guard995
- Enabling SNMP Traps for Root Elections and Topology Changes995
- Configuring Spanning Trees as Hitless996
- STP Loop Guard996
  - Configuring Loop Guard997
- Displaying STP Guard Configuration998
55 System Time and Date1000
- Network Time Protocol1000
- Dell Networking os Time and Date1007
56 Tunneling1011
- Configuring a Tunnel1011
- Configuring Tunnel Keepalive Settings1012
- Configuring a Tunnel Interface1013
- Configuring Tunnel Allow-Remote Decapsulation1013
- Configuring Tunnel Source Anylocal Decapsulation1014
57 Uplink Failure Detection (UFD)1015
- Feature Description1015
- How Uplink Failure Detection Works1016
- UFD and NIC Teaming1017
- Important Points to Remember1018
- Configuring Uplink Failure Detection1018
- Clearing a UFD-Disabled Interface1020
- Displaying Uplink Failure Detection1021
- Sample Configuration: Uplink Failure Detection1024
58 Upgrade Procedures1026
- Get Help with Upgrades1026
59 Virtual Lans (Vlans)1027
- Default VLAN1027
- Port-Based Vlans1028
- Vlans and Port Tagging1029
- Configuration Task List1029
- Configuring Native Vlans1033
- Enabling Null VLAN as the Default VLAN1034
60 Virtual Link Trunking (VLT)1035
- Overview1035
  - VLT on Core Switches1036
  - Enhanced VLT1036
- VLT Terminology1037
- Configure Virtual Link Trunking1038
- RSTP Configuration1050
- PVST+ Configuration1062
  - Sample PVST+ Configuration1063
- Evlt Configuration Example1064
  - Evlt Configuration Step Examples1064
- PIM-Sparse Mode Configuration Example1066
- Verifying a VLT Configuration1067
- Additional VLT Sample Configurations1071
  - Verifying a Port-Channel Connection to a VLT Domain1072
  - Switch)1072
- Troubleshooting VLT1073
- Reconfiguring Stacked Switches as VLT1074
- Specifying VLT Nodes in a PVLAN1075
- Configuring a VLT VLAN or LAG in a PVLAN1079
  - Creating a VLT LAG or a VLT VLAN1079
  - Associating the VLT LAG or VLT VLAN in a PVLAN1080
- Proxy ARP Capability on VLT Peer Nodes1081
  - Working of Proxy ARP for VLT Peer Nodes1082
- VLT Nodes as Rendezvous Points for Multicast Resiliency1083
- Configuring VLAN-Stack over VLT1084
61 VLT Proxy Gateway1088
- Proxy Gateway in VLT Domains1088
- Configuring an LLDP VLT Proxy Gateway1093
62 Virtual Routing and Forwarding (VRF)1094
- VRF Overview1094
- VRF Configuration Notes1095
  - Dhcp1098
- VRF Configuration1098
- Sample VRF Configuration1102
- Route Leaking Vrfs1110
- Dynamic Route Leaking1110
  - Configuring Route Leaking Without Filtering Criteria1110
  - Configuring Route Leaking with Filtering1113
63 Virtual Router Redundancy Protocol (VRRP)1116
- VRRP Overview1116
- VRRP Benefits1117
- VRRP Implementation1117
- VRRP Configuration1118
- Sample Configurations1133
  - VRRP for an Ipv4 Configuration1133
  - VRRP in a VRF Configuration1138
64 Series Debugging and Diagnostics1144
- Offline Diagnostics1144
  - Important Points to Remember1144
  - Running Offline Diagnostics1144
- Trace Logs1148
- Auto Save on Crash or Rollover1148
- Last Restart Reason1148
- Hardware Watchdog Timer1149
- Using the Show Hardware Commands1149
- Enabling Environmental Monitoring1150
- Troubleshooting Packet Loss1153
- Enabling Application Core Dumps1163
- Mini Core Dumps1163
- Enabling TCP Dumps1164
65 Standards Compliance1165
- IEEE Compliance1165
- RFC and I-D Compliance1166
- MIB Location1178

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Brand	Dell
Model	S4820T
Category	Switch
Language	English