Dell S4048T - Configuring Interfaces for Layer 2 Mode

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Configuring Interfaces for Layer 2 Mode

All interfaces on all switches that participate in spanning tree must be in Layer 2 mode and enabled.

Figure 127. Example of Configuring Interfaces for Layer 2 Mode

To configure and enable the interfaces for Layer 2, use the following command.

1 If the interface has been assigned an IP address, remove it.

INTERFACE mode

no ip address

2 Place the interface in Layer 2 mode.

INTERFACE

Spanning Tree Protocol (STP) 1046

Main Page

Default Chapter3
- Table of Contents3
1 About this Guide37
- Audience37
- Conventions37
- Related Documents38
2 Configuration Fundamentals39
- Accessing the Command Line39
- CLI Modes40
  - Navigating CLI Modes41
- The Do Command45
- Undoing Commands45
- Obtaining Help46
- Entering and Editing Commands46
- Command History47
- Filtering Show Command Outputs48
  - Example of the Grep Keyword48
- Multiple Users in Configuration Mode49
3 Getting Started50
- Console Access51
  - Serial Console51
- Accessing the CLI Interface and Running Scripts Using SSH52
  - Entering CLI Commands Using an SSH Connection52
  - Executing Local CLI Scripts Using an SSH Connection53
- Default Configuration53
- Configuring a Host Name53
- Accessing the System Remotely54
- Configuring the Enable Password55
- Configuration File Management56
- Managing the File System64
- Enabling Software Features on Devices Using a Command Option64
- View Command History65
- Upgrading Dell Networking os65
- Verify Software Images before Installation66
- Using HTTP for File Transfers67
4 Management69
- Configuring Privilege Levels69
- Configuring Logging73
- Track Login Activity78
- Limit Concurrent Login Sessions81
- Log Messages in the Internal Buffer83
  - Configuration Task List for System Log Management83
- Disabling System Logging83
- Sending System Messages to a Syslog Server84
  - Configuring a UNIX System as a Syslog Server84
- Changing System Logging Settings84
- Display the Logging Buffer and the Logging Configuration85
- Configuring a UNIX Logging Facility Level86
- Synchronizing Log Messages87
- Enabling Timestamp on Syslog Messages88
- File Transfer Services88
- Terminal Lines90
  - Denying and Permitting Access to a Terminal Line91
  - Configuring Login Authentication for Terminal Lines92
- Setting Timeout for EXEC Privilege Mode93
- Using Telnet to Get to Another Network Device94
- Lock CONFIGURATION Mode94
  - Viewing the Configuration Lock Status95
- Restoring the Factory Default Settings95
  - Important Points to Remember96
  - Restoring Factory Default Environment Variables96
802.1Ag99
- Ethernet CFM99
- Maintenance Domains100
- Maintenance Points101
- Maintenance End Points101
- Implementation Information102
- Configuring the CFM102
  - Related Configuration Tasks103
- Enable Ethernet CFM103
- Creating a Maintenance Domain103
- Creating a Maintenance Association104
- Create Maintenance Points104
- Continuity Check Messages106
  - Enabling CCM107
  - Enabling Cross-Checking108
- Sending Loopback Messages and Responses108
- Sending Linktrace Messages and Responses109
  - Caching Link Trace110
- Enabling CFM SNMP Traps111
- Displaying Ethernet CFM Statistics112
802.1X116
- Port-Authentication Process116
  - EAP over RADIUS118
- Configuring 802.1X118
  - Related Configuration Tasks118
- Important Points to Remember119
- Enabling 802.1X120
- Configuring Request Identity Re-Transmissions122
  - Configuring a Quiet Period after a Failed Authentication122
- Forcibly Authorizing or Unauthorizing a Port123
- Re-Authenticating a Port124
- Configuring Timeouts125
- Configuring Dynamic VLAN Assignment with Port Authentication126
- Guest and Authentication-Fail Vlans127
  - Configuring a Guest VLAN128
  - Configuring an Authentication-Fail VLAN128
7 Access Control List (ACL) VLAN Groups and Content Addressable Memory (CAM)130
- Optimizing CAM Utilization During the Attachment of Acls to Vlans130
- Guidelines for Configuring ACL VLAN Groups131
- Configuring ACL VLAN Groups and Configuring FP Blocks for VLAN Parameters132
  - Configuring ACL VLAN Groups132
  - Configuring FP Blocks for VLAN Parameters133
- Viewing CAM Usage134
- Allocating FP Blocks for VLAN Processes135
8 Access Control Lists (Acls)137
- IP Access Control Lists (Acls)138
  - CAM Usage139
  - Implementing Acls on Dell Networking os140
- Important Points to Remember141
- IP Fragment Handling148
  - IP Fragments ACL Examples149
  - Layer 4 ACL Rules Examples149
- Configure a Standard IP ACL150
  - Configuring a Standard IP ACL Filter151
- Configure an Extended IP ACL152
  - Configuring Filters with a Sequence Number152
  - Configuring Filters Without a Sequence Number154
- Configure Layer 2 and Layer 3 Acls155
- Assign an IP ACL to an Interface155
- Applying an IP ACL156
  - Counting ACL Hits157
- Configure Ingress Acls157
- Configure Egress Acls158
  - Applying Egress Layer 3 Acls (Control-Plane)159
- IP Prefix Lists159
  - Implementation Information160
  - Configuration Task List for Prefix Lists160
- ACL Resequencing164
  - Resequencing an ACL or Prefix List165
- Route Maps166
  - Implementation Information166
- Logging of ACL Processes166
  - Guidelines for Configuring ACL Logging168
  - Configuring ACL Logging168
- Flow-Based Monitoring Support for Acls169
  - Behavior of Flow-Based Monitoring169
  - Enabling Flow-Based Monitoring171
- Configuring UDF ACL172
9 Bidirectional Forwarding Detection (BFD)176
- How BFD Works176
- Important Points to Remember182
- Configure BFD183
10 Border Gateway Protocol Ipv4 (Bgpv4)207
- Autonomous Systems (AS)207
- Sessions and Peers210
  - Establish a Session210
- Route Reflectors211
- BGP Attributes212
- Multiprotocol BGP218
- Implement BGP with Dell Networking os219
- Configuration Information225
- BGP Configuration226
- Enabling MBGP Configurations263
- BGP Regular Expression Optimization263
- Debugging BGP264
- Sample Configurations267
11 Content Addressable Memory (CAM)274
- CAM Allocation274
- Test CAM Usage276
- View CAM-ACL Settings277
- View CAM Usage279
- CAM Optimization279
- Troubleshoot CAM Profiling279
  - Qos CAM Region Limitation279
12 Control Plane Policing (Copp)281
- Configure Control Plane Policing283
13 Data Center Bridging (DCB)293
- Ethernet Enhancements in Data Center Bridging293
  - Priority-Based Flow Control295
  - Enhanced Transmission Selection296
  - Data Center Bridging Exchange Protocol (Dcbx)297
  - Data Center Bridging in a Traffic Flow298
- Enabling Data Center Bridging298
  - DCB Maps and Its Attributes299
- Data Center Bridging: Default Configuration300
- Configuring Priority-Based Flow Control301
  - Configuring Lossless Queues302
- Configuring PFC in a DCB Map303
  - PFC Configuration Notes303
  - PFC Prerequisites and Restrictions304
- Applying a DCB Map on a Port305
- Configuring PFC Without a DCB Map305
  - Configuring Lossless Queuesexample306
- Priority-Based Flow Control Using Dynamic Buffer Method308
  - Pause and Resume of Traffic308
  - Buffer Sizes for Lossless or PFC Packets309
- Behavior of Tagged Packets309
- Configuration Example for DSCP and PFC Priorities310
- Using PFC to Manage Converged Ethernet Traffic311
- Configure Enhanced Transmission Selection311
  - ETS Prerequisites and Restrictions311
  - Creating an ETS Priority Group312
  - ETS Operation with Dcbx313
  - Configuring Bandwidth Allocation for Dcbx CIN314
  - Configuring ETS in a DCB Map315
- Hierarchical Scheduling in ETS Output Policies316
- Using ETS to Manage Converged Ethernet Traffic317
- Applying DCB Policies in a Switch Stack317
- Configure a Dcbx Operation318
  - Dcbx Operation318
  - Dcbx Port Roles318
  - DCB Configuration Exchange320
  - Configuration Source Election321
  - Propagation of DCB Information321
  - Auto-Detection and Manual Configuration of the Dcbx Version322
  - Dcbx Example322
  - Dcbx Prerequisites and Restrictions323
  - Configuring Dcbx323
- Verifying the DCB Configuration327
- Qos Dot1P Traffic Classification and Queue Assignment338
- Configuring the Dynamic Buffer Method339
- Sample DCB Configuration340
  - PFC and ETS Configuration Command Examples342
14 Dynamic Host Configuration Protocol (DHCP)343
- DHCP Packet Format and Options343
- Assign an IP Address Using DHCP345
- Implementation Information346
- Configure the System to be a DHCP Server347
- Configure the System to be a Relay Agent351
- Configure the System to be a DHCP Client353
- Configure the System for User Port Stacking (Option 230)357
- Configure Secure DHCP357
- Source Address Validation365
15 Equal Cost Multi-Path (ECMP)368
- ECMP for Flow-Based Affinity368
- Link Bundle Monitoring369
- Rtag7372
- Flow-Based Hashing for ECMP373
16 FIP Snooping377
- Fibre Channel over Ethernet377
- Ensure Robustness in a Converged Ethernet Network377
- FIP Snooping on Ethernet Bridges379
- FIP Snooping in a Switch Stack382
- Using FIP Snooping382
- Displaying FIP Snooping Information387
- Fcoe Transit Configuration Example393
17 FIPS Cryptography395
- Configuration Tasks395
- Preparing the System396
- Enabling FIPS Mode396
- Generating Host-Keys397
- Monitoring FIPS Mode Status397
- Disabling FIPS Mode397
18 Force10 Resilient Ring Protocol (FRRP)399
- Protocol Overview399
- Implementing FRRP404
- FRRP Configuration405
- Troubleshooting FRRP409
  - Configuration Checks409
- Sample Configuration and Topology409
19 GARP VLAN Registration Protocol (GVRP)412
- Important Points to Remember412
- Configure GVRP414
  - Related Configuration Tasks415
- Enabling GVRP Globally415
- Enabling GVRP on a Layer 2 Interface415
- Configure GVRP Registration416
- Configure a GARP Timer416
- RPM Redundancy417
20 High Availability (HA)418
- Component Redundancy418
- Pre-Configuring a Stack Unit Slot421
- Removing a Provisioned Logical Stack Unit421
- Hitless Behavior422
- Graceful Restart422
- Software Resiliency423
- Hot-Lock Behavior424
21 Internet Group Management Protocol (IGMP)425
- IGMP Implementation Information425
- IGMP Protocol Overview426
  - IGMP Version 2426
  - IGMP Version 3427
- Configure IGMP431
  - Related Configuration Tasks431
- Viewing IGMP Enabled Interfaces431
- Selecting an IGMP Version432
- Viewing IGMP Groups432
- Adjusting Timers433
  - Adjusting Query and Response Timers433
- Preventing a Host from Joining a Group434
- Enabling IGMP Immediate-Leave437
- IGMP Snooping437
- Fast Convergence after MSTP Topology Changes440
- Egress Interface Selection (EIS) for HTTP and IGMP Applications440
- Designating a Multicast Router Interface450
22 Interfaces451
- Basic Interface Configuration451
- Advanced Interface Configuration451
- Interface Types452
- View Basic Interface Information453
- Resetting an Interface to Its Factory Default State455
- Enabling a Physical Interface455
- Physical Interfaces456
  - Configuration Task List for Physical Interfaces456
  - Overview of Layer Modes456
  - Configuring Layer 2 (Data Link) Mode457
  - Configuring Layer 2 (Interface) Mode457
  - Configuring Layer 3 (Network) Mode458
  - Configuring Layer 3 (Interface) Mode458
- Egress Interface Selection (EIS)459
  - Important Points to Remember459
  - Configuring EIS460
- Management Interfaces460
  - Configuring Management Interfaces460
  - Configuring a Management Interface on an Ethernet Port462
- VLAN Interfaces463
- Loopback Interfaces464
- Null Interfaces464
- Port Channel Interfaces465
  - Port Channel Definition and Standards465
  - Port Channel Benefits465
  - Port Channel Implementation465
  - Interfaces in Port Channels466
  - Configuration Tasks for Port Channel Interfaces466
  - Creating a Port Channel467
  - Adding a Physical Interface to a Port Channel467
  - Reassigning an Interface to a New Port Channel469
  - Configuring the Minimum Oper up Links in a Port Channel470
  - Adding or Removing a Port Channel from a VLAN470
  - Assigning an IP Address to a Port Channel472
  - Deleting or Disabling a Port Channel472
  - Load Balancing through Port Channels472
  - Changing the Hash Algorithm473
- Bulk Configuration473
  - Interface Range473
  - Bulk Configuration Examples474
- Defining Interface Range Macros476
  - Define the Interface Range476
  - Choosing an Interface-Range Macro476
- Monitoring and Maintaining Interfaces476
  - Maintenance Using TDR478
- Non Dell-Qualified Transceivers478
- Splitting QSFP Ports to SFP+ Ports479
- Converting a QSFP or QSFP+ Port to an SFP or SFP+ Port480
  - Important Points to Remember480
  - Example Scenarios481
- Link Dampening482
  - Important Points to Remember482
  - Enabling Link Dampening482
- Link Bundle Monitoring484
- Using Ethernet Pause Frames for Flow Control485
  - Enabling Pause Frames486
- Configure the MTU Size on an Interface486
- Port-Pipes487
- Auto-Negotiation on Ethernet Interfaces488
  - Setting the Speed and Duplex Mode of Ethernet Interfaces488
  - Set Auto-Negotiation Options490
- View Advanced Interface Information490
  - Configuring the Interface Sampling Size491
- Dynamic Counters493
  - Clearing Interface Counters493
23 Internet Protocol Security (Ipsec)495
- Configuring Ipsec496
24 Ipv4 Routing497
- IP Addresses498
  - Implementation Information498
- Configuration Tasks for IP Addresses498
- Assigning IP Addresses to an Interface499
- Configuring Static Routes500
- Configure Static Routes for the Management Interface501
- Ipv4 Path MTU Discovery Overview501
- Using the Configured Source IP Address in ICMP Messages502
  - Configuring the ICMP Source Interface502
- Configuring the Duration to Establish a TCP Connection503
- Enabling Directed Broadcast503
- Resolution of Host Names504
- Enabling Dynamic Resolution of Host Names504
- Specifying the Local System Domain and a List of Domains505
- Configuring DNS with Traceroute505
- Arp506
- Configuration Tasks for ARP506
- Configuring Static ARP Entries507
- Enabling Proxy ARP507
- Clearing ARP Cache508
- ARP Learning Via Gratuitous ARP508
- Enabling ARP Learning Via Gratuitous ARP509
- ARP Learning Via ARP Request509
- Configuring ARP Retries510
- Icmp511
- Configuration Tasks for ICMP511
- Enabling ICMP Unreachable Messages511
- UDP Helper512
  - Configure UDP Helper512
  - Important Points to Remember512
- Enabling UDP Helper512
- Configuring a Broadcast Address513
- Configurations Using UDP Helper513
- UDP Helper with Broadcast-All Addresses514
- UDP Helper with Subnet Broadcast Addresses515
- UDP Helper with Configured Broadcast Addresses515
- UDP Helper with no Configured Broadcast Addresses516
- Troubleshooting UDP Helper516
25 Ipv6 Routing518
- Protocol Overview518
- Implementing Ipv6 with Dell Networking os524
- Icmpv6527
- Path MTU Discovery527
- Ipv6 Neighbor Discovery528
  - Ipv6 Neighbor Discovery of MTU Packets529
- Configuration Task List for Ipv6 RDNSS529
- Secure Shell (SSH) over an Ipv6 Transport532
- Configuration Tasks for Ipv6532
- Configuring Ipv6 RA Guard539
  - Configuring Ipv6 RA Guard on an Interface541
  - Monitoring Ipv6 RA Guard541
26 Iscsi Optimization542
- Iscsi Optimization Overview542
- Default Iscsi Optimization Values549
- Iscsi Optimization Prerequisites549
- Configuring Iscsi Optimization549
- Displaying Iscsi Optimization Information552
27 Intermediate System to Intermediate System554
- IS-IS Protocol Overview554
- IS-IS Addressing555
- Multi-Topology IS-IS555
- Graceful Restart556
  - Timers557
- Implementation Information557
- Configuration Information558
- IS-IS Metric Styles575
- Configure Metric Values575
- Sample Configurations578
28 Link Aggregation Control Protocol (LACP)581
- Introduction to Dynamic Lags and LACP581
- LACP Configuration Tasks583
- Shared LAG State Tracking585
  - Configuring Shared LAG State Tracking586
  - Important Points about Shared LAG State Tracking588
- LACP Basic Configuration Example588
  - Configure a LAG on ALPHA588
29 Layer 2597
- Manage the MAC Address Table597
- MAC Learning Limit598
- NIC Teaming602
- Configure Redundant Pairs604
  - Important Points about Configuring Redundant Pairs606
- Far-End Failure Detection607
30 Link Layer Discovery Protocol (LLDP)613
- 802.1AB (LLDP) Overview613
  - Protocol Data Units613
- Optional Tlvs614
  - Management Tlvs615
- TIA-1057 (LLDP-MED) Overview617
  - TIA Organizationally Specific Tlvs617
- Configure LLDP622
- CONFIGURATION Versus INTERFACE Configurations622
- Enabling LLDP623
  - Disabling and Undoing LLDP623
- Enabling LLDP on Management Ports624
  - Disabling and Undoing LLDP on Management Ports624
- Advertising Tlvs624
- Viewing the LLDP Configuration626
- Viewing Information Advertised by Adjacent LLDP Agents626
- Configuring LLDPDU Intervals627
- Configuring Transmit and Receive Mode628
- Configuring the Time to Live Value629
- Debugging LLDP630
- Relevant Management Objects631
31 Microsoft Network Load Balancing637
- NLB Unicast Mode Scenario637
- NLB Multicast Mode Scenario638
- Limitations of the NLB Feature638
- Microsoft Clustering638
- Enable and Disable VLAN Flooding639
- Configuring a Switch for NLB639
  - Enabling a Switch for Multicast NLB639
32 Multicast Source Discovery Protocol (MSDP)641
- Protocol Overview641
- Anycast RP644
- Implementation Information644
- Configure Multicast Source Discovery Protocol644
  - Related Configuration Tasks645
- Enable MSDP649
- Manage the Source-Active Cache650
- Accept Source-Active Messages that Fail the RFP Check652
- Specifying Source-Active Messages655
- Limiting the Source-Active Messages from a Peer656
- Preventing MSDP from Caching a Local Source656
- Preventing MSDP from Caching a Remote Source657
- Preventing MSDP from Advertising a Local Source658
- Logging Changes in Peership States659
- Terminating a Peership659
- Clearing Peer Statistics660
- Debugging MSDP660
- MSDP with Anycast RP661
- Configuring Anycast RP662
  - Reducing Source-Active Message Flooding663
  - Specifying the RP Address Used in SA Messages663
- MSDP Sample Configurations666
33 Multiple Spanning Tree Protocol (MSTP)669
- Protocol Overview669
- Spanning Tree Variations671
  - Implementation Information671
- Configure Multiple Spanning Tree Protocol671
  - Related Configuration Tasks671
- Enable Multiple Spanning Tree Globally672
- Adding and Removing Interfaces672
- Creating Multiple Spanning Tree Instances673
- Influencing MSTP Root Selection674
- Interoperate with Non-Dell Bridges675
- Changing the Region Name or Revision675
- Modifying Global Parameters676
- Modifying the Interface Parameters677
- Configuring an Edgeport678
- Flush MAC Addresses after a Topology Change679
- MSTP Sample Configurations680
  - Router 1 Running-Configurationrouter 2 Running-Configurationrouter 3 Running-Configurationsftos Example Running-Configuration680
- Debugging and Verifying MSTP Configurations683
34 Multicast Features686
- Enabling IP Multicast686
- Implementation Information686
- Multicast Policies687
  - Ipv4 Multicast Policies687
35 Object Tracking695
- Object Tracking Overview695
- Object Tracking Configuration699
- Displaying Tracked Objects706
36 Open Shortest Path First (Ospfv2 and Ospfv3)708
- Protocol Overview708
- OSPF with Dell Networking os715
- Configuration Information719
- Configuration Task List for Ospfv3 (OSPF for Ipv6)750
37 Policy-Based Routing (PBR)767
- Overview767
- Implementing PBR768
- Configuration Task List for Policy-Based Routing769
- Sample Configuration774
  - 2/11View Redirect-List GOLD776
38 PIM Sparse-Mode (PIM-SM)779
- Implementation Information779
- Protocol Overview779
- Configuring PIM-SM781
  - Related Configuration Tasks781
- Enable PIM-SM781
- Configuring S,G Expiry Timers782
- Configuring a Static Rendezvous Point783
  - Overriding Bootstrap Router Updates784
- Configuring a Designated Router784
- Creating Multicast Boundaries and Domains785
39 PIM Source-Specific Mode (PIM-SSM)786
- Implementation Information786
  - Important Points to Remember787
- Configure PIM-SSM787
  - Related Configuration Tasks787
- Enabling PIM-SSM787
- Use PIM-SSM with IGMP Version 2 Hosts788
  - Configuring PIM-SSM with Igmpv2788
40 Port Monitoring791
- Important Points to Remember791
- Port Monitoring792
- Configuring Port Monitoring794
- Configuring Monitor Multicast Queue795
- Enabling Flow-Based Monitoring796
- Remote Port Mirroring797
- Encapsulated Remote Port Monitoring804
- ERPM Behavior on a Typical Dell Networking os806
  - Decapsulation of ERPM Packets at the Destination IP/ Analyzer807
41 Private Vlans (PVLAN)809
- Private VLAN Concepts809
- Using the Private VLAN Commands810
- Configuration Task List811
- Private VLAN Configuration Example816
- Inspecting the Private VLAN Configuration817
42 Per-VLAN Spanning Tree Plus (PVST+)820
- Protocol Overview820
- Implementation Information821
- Configure Per-VLAN Spanning Tree Plus822
  - Related Configuration Tasks822
- Enabling PVST822
- Disabling PVST823
- Influencing PVST+ Root Selection824
- Modifying Global PVST+ Parameters825
- Modifying Interface PVST+ Parameters826
- Configuring an Edgeport827
- PVST+ in Multi-Vendor Networks828
- Enabling PVST+ Extend System ID828
- PVST+ Sample Configurations829
43 Quality of Service (Qos)832
- Implementation Information835
- Port-Based Qos Configurations835
- Policy-Based Qos Configurations838
- DSCP Color Maps849
- Enabling Qos Rate Adjustment851
- Enabling Strict-Priority Queueing852
- Weighted Random Early Detection852
- Pre-Calculating Available Qos CAM Space855
- Configuring Weights and ECN for WRED856
  - Global Service Pools with WRED and ECN Settings857
- Configuring WRED and ECN Attributes858
- Guidelines for Configuring ECN for Classifying and Color-Marking Packets859
- Applying Layer 2 Match Criteria on a Layer 3 Interface864
- Applying DSCP and VLAN Match Criteria on a Service Queue864
- Classifying Incoming Packets Using ECN and Color-Marking865
- Guidelines for Configuring ECN for Classifying and Color-Marking Packets868
- Sample Configuration to Mark Non-Ecn Packets as "Yellow" with Multiple Traffic Class868
- Sample Configuration to Mark Non-Ecn Packets as "Yellow" with Single Traffic Class869
- Enabling Buffer Statistics Tracking870
44 Routing Information Protocol (RIP)873
- Protocol Overview873
  - Ripv1873
  - Ripv2874
- Implementation Information874
- Configuration Information874
  - Configuration Task List875
  - RIP Configuration Example881
45 Remote Monitoring (RMON)887
- Implementation Information887
- Fault Recovery888
46 Rapid Spanning Tree Protocol (RSTP)892
- Protocol Overview892
- Configuring Rapid Spanning Tree892
  - Related Configuration Tasks892
- Important Points to Remember893
  - RSTP and VLT893
- Configuring Interfaces for Layer 2 Mode893
- Enabling Rapid Spanning Tree Protocol Globally894
- Adding and Removing Interfaces896
- Modifying Global Parameters897
  - Enabling SNMP Traps for Root Elections and Topology Changes898
- Modifying Interface Parameters898
- Enabling SNMP Traps for Root Elections and Topology Changes899
- Influencing RSTP Root Selection899
- Configuring an Edgeport900
- Configuring Fast Hellos for Link State Detection901
47 Software-Defined Networking (SDN)902
48 Security903
- AAA Accounting903
  - Configuration Task List for AAA Accounting903
- AAA Authentication906
  - Configuration Task List for AAA Authentication906
- Obscuring Passwords and Keys909
- AAA Authorization910
  - Privilege Levels Overview910
  - Configuration Task List for Privilege Levels910
- Radius915
- Tacacs920
- Protection from TCP Tiny and Overlapping Fragment Attacks923
- Enabling SCP and SSH923
- Telnet931
- VTY Line and Access-Class Configuration932
- Role-Based Access Control934
49 Service Provider Bridging947
- VLAN Stacking947
- VLAN Stacking Packet Drop Precedence957
- Dynamic Mode Cos for VLAN Stacking960
  - Mapping C-Tag to S-Tag Dot1P Values961
- Layer 2 Protocol Tunneling962
- Provider Backbone Bridging967
50 Sflow969
- Overview969
- Implementation Information970
  - Important Points to Remember970
- Enabling Extended Sflow971
- Enabling and Disabling Sflow on an Interface972
- Enabling Sflow Max-Header Size Extended972
- Sflow Show Commands973
- Configuring Specify Collectors975
- Changing the Polling Intervals975
- Back-Off Mechanism976
- Sflow on LAG Ports976
- Enabling Extended Sflow976
  - Important Points to Remember977
51 Simple Network Management Protocol (SNMP)979
- Protocol Overview980
- Implementation Information980
- Snmpv3 Compliance with FIPS980
- Configuration Task List for SNMP981
  - Related Configuration Tasks982
- Important Points to Remember982
- Set up SNMP982
  - Creating a Community982
  - Setting up User-Based Security (Snmpv3)983
- Reading Managed Object Values984
- Writing Managed Object Values985
- Configuring Contact and Location Information Using SNMP986
- Subscribing to Managed Object Value Updates Using SNMP987
- Enabling a Subset of SNMP Traps988
- Enabling an SNMP Agent to Notify Syslog Server Failure990
- Copy Configuration Files Using SNMP991
  - Copying a Configuration File993
  - Copying Configuration Files Via SNMP994
  - Copying the Startup-Config Files to the Running-Config994
  - Copying the Startup-Config Files to the Server Via FTP995
  - Copying the Startup-Config Files to the Server Via TFTP995
  - Copy a Binary File to the Startup-Configuration996
  - Additional MIB Objects to View Copy Statistics996
  - Obtaining a Value for MIB Objects997
- MIB Support to Display the Available Memory Size on Flash998
  - Viewing the Available Flash Memory Size998
- MIB Support to Display the Software Core Files Generated by the System999
  - Viewing the Software Core Files Generated by the System999
- Manage Vlans Using SNMP1000
  - Creating a VLAN1000
  - Assigning a VLAN Alias1000
  - Displaying the Ports in a VLAN1001
  - Add Tagged and Untagged Ports to a VLAN1002
- Managing Overload on Startup1003
- Enabling and Disabling a Port Using SNMP1004
- Fetch Dynamic MAC Entries Using SNMP1004
- Deriving Interface Indices1006
- Monitor Port-Channels1007
- Enabling an SNMP Agent to Notify Syslog Server Failure1008
- Troubleshooting SNMP Operation1009
52 Stacking1011
- Stacking Overview1011
- Important Points to Remember1021
- Stacking Installation Tasks1021
- Stacking Configuration Tasks1029
- Verify a Stack Configuration1035
  - Displaying the Status of Stacking Ports1035
- Remove Units or Front End Ports from a Stack1037
  - Removing a Unit from a Stack1037
  - Removing Front End Port Stacking1038
- Troubleshoot a Stack1039
  - Recover from Stack Link Flaps1039
  - Recover from a Card Problem State on a Stack1039
53 Storm Control1041
- Configure Storm Control1041
  - Configuring Storm Control from INTERFACE Mode1042
  - Configuring Storm Control from CONFIGURATION Mode1042
54 Spanning Tree Protocol (STP)1044
- Protocol Overview1044
- Configure Spanning Tree1045
  - Related Configuration Tasks1045
- Important Points to Remember1045
- Configuring Interfaces for Layer 2 Mode1046
- Enabling Spanning Tree Protocol Globally1047
- Adding an Interface to the Spanning Tree Group1050
- Modifying Global Parameters1050
- Modifying Interface STP Parameters1051
- Enabling Portfast1052
  - Prevent Network Disruptions with BPDU Guard1053
- Selecting STP Root1055
- STP Root Guard1055
  - Root Guard Scenario1056
  - Configuring Root Guard1057
- Enabling SNMP Traps for Root Elections and Topology Changes1057
- Configuring Spanning Trees as Hitless1058
- STP Loop Guard1058
  - Configuring Loop Guard1059
- Displaying STP Guard Configuration1060
55 Supportassist1062
- Configuring Supportassist Using a Configuration Wizard1063
- Configuring Supportassist Manually1063
- Configuring Supportassist Activity1065
- Configuring Supportassist Company1067
- Configuring Supportassist Person1068
- Configuring Supportassist Server1069
- Viewing Supportassist Configuration1069
56 System Time and Date1072
- Network Time Protocol1072
- Dell Networking os Time and Date1080
57 Tunneling1084
- Configuring a Tunnel1084
- Configuring Tunnel Keepalive Settings1085
- Configuring a Tunnel Interface1086
- Configuring Tunnel Allow-Remote Decapsulation1086
- Configuring the Tunnel Source Anylocal1087
58 Uplink Failure Detection (UFD)1088
- Feature Description1088
- How Uplink Failure Detection Works1089
- UFD and NIC Teaming1090
- Important Points to Remember1091
- Configuring Uplink Failure Detection1091
- Clearing a UFD-Disabled Interface1093
- Displaying Uplink Failure Detection1094
- Sample Configuration: Uplink Failure Detection1096
59 Upgrade Procedures1098
- Get Help with Upgrades1098
60 Virtual Lans (Vlans)1099
- Default VLAN1100
- Port-Based Vlans1100
- Vlans and Port Tagging1101
- Configuration Task List1101
- Configuring Native Vlans1105
- Enabling Null VLAN as the Default VLAN1106
61 VLT Proxy Gateway1107
- Proxy Gateway in VLT Domains1107
- Configuring an LLDP VLT Proxy Gateway1112
- Configuring a Static VLT Proxy Gateway1113
62 Virtual Link Trunking (VLT)1114
- Overview1114
  - VLT on Core Switches1115
  - Enhanced VLT1116
- VLT Terminology1116
- Configure Virtual Link Trunking1117
- RSTP Configuration1129
- PVST+ Configuration1142
  - Sample PVST+ Configuration1142
- Evlt Configuration Example1143
  - Evlt Configuration Step Examples1144
- PIM-Sparse Mode Configuration Example1146
- Verifying a VLT Configuration1147
- Additional VLT Sample Configurations1150
- Troubleshooting VLT1152
- Reconfiguring Stacked Switches as VLT1154
- Specifying VLT Nodes in a PVLAN1154
- Configuring a VLT VLAN or LAG in a PVLAN1159
  - Creating a VLT LAG or a VLT VLAN1159
  - Associating the VLT LAG or VLT VLAN in a PVLAN1160
- Proxy ARP Capability on VLT Peer Nodes1161
  - Working of Proxy ARP for VLT Peer Nodes1162
- VLT Nodes as Rendezvous Points for Multicast Resiliency1163
- Configuring VLAN-Stack over VLT1164
- Ipv6 Peer Routing in VLT Domains Overview1167
63 Virtual Extensible LAN (VXLAN)1174
- Overview1174
- Components of VXLAN Network1175
- Functional Overview of VXLAN Gateway1176
- VXLAN Frame Format1176
  - Components of VXLAN Frame Format1177
- Configuring and Controlling VXLAN from the NVP Controller GUI1178
- Configuring Vxlan Gateway1181
  - Connecting to an NVP Controller1181
  - Advertising VXLAN Access Ports to Controller1182
- Displaying VXLAN Configurations1184
- VXLAN Service Nodes for BFD1185
  - Examples of the Show Bfd Neighbors Command1185
64 Virtual Routing and Forwarding (VRF)1186
- VRF Overview1186
- VRF Configuration Notes1187
  - Dhcp1190
- VRF Configuration1190
- Sample VRF Configuration1195
- Route Leaking Vrfs1201
- Dynamic Route Leaking1202
  - Configuring Route Leaking Without Filtering Criteria1202
  - Configuring Route Leaking with Filtering1205
65 Virtual Router Redundancy Protocol (VRRP)1209
- VRRP Overview1209
- VRRP Benefits1210
- VRRP Implementation1210
- VRRP Configuration1211
  - Configuration Task List1211
    - Creating a Virtual Router1212
    - Configuring Vrrp Authentication1216
  - Setting VRRP Initialization Delay1221
- Sample Configurations1222
66 Debugging and Diagnostics1237
- Offline Diagnostics1237
  - Important Points to Remember1237
  - Running Offline Diagnostics1237
- Trace Logs1241
- Auto Save on Crash or Rollover1241
- Last Restart Reason1241
- Hardware Watchdog Timer1241
- Using the Show Hardware Commands1242
- Enabling Environmental Monitoring1243
- Buffer Tuning1247
- Troubleshooting Packet Loss1252
- Enabling Application Core Dumps1260
- Mini Core Dumps1261
- Enabling TCP Dumps1262
67 Standards Compliance1263
- IEEE Compliance1263
- RFC and I-D Compliance1264
- MIB Location1277

Dell S4048T - Configuring Interfaces for Layer 2 Mode

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