Name: Dell S3048-ON
Brand: Dell
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Example of Viewing STP Guard Conguration

Dell#show spanning-tree 0 guard

Interface

Name Instance Sts Guard type

--------- -------- --------- ----------

Gi 1/1 0 INCON(Root) Rootguard

Gi 1/2 0 LIS Loopguard

Gi 1/3 0 EDS (Shut) Bpduguard

838 Spanning Tree Protocol (STP)

Default Chapter3
- Table of Contents3
1 About this Guide33
- Audience33
- Conventions33
- Related Documents33
2 Configuration Fundamentals34
- Accessing the Command Line34
- CLI Modes34
  - Navigating CLI Modes36
- The Do Command39
- Undoing Commands39
- Obtaining Help40
- Entering and Editing Commands40
- Command History41
- Filtering Show Command Outputs41
  - Example of the Grep Keyword41
- Multiple Users in Configuration Mode42
3 Getting Started44
- Console Access45
  - Serial Console45
  - Pin Assignments45
- Accessing the CLI Interface and Running Scripts Using SSH46
  - Entering CLI Commands Using an SSH Connection46
  - Executing Local CLI Scripts Using an SSH Connection46
- Default Configuration47
- Configuring a Host Name47
- Accessing the System Remotely47
- Configuring the Enable Password48
- Configuration File Management49
- Managing the File System56
- Enabling Software Features on Devices Using a Command Option56
- View Command History57
- Upgrading Dell Networking os57
- Verify Software Images before Installation57
- Using HTTP for File Transfers58
4 Management60
- Configuring Privilege Levels60
  - Creating a Custom Privilege Level61
  - Removing a Command from EXEC Mode61
  - Moving a Command from EXEC Privilege Mode to EXEC Mode61
  - Allowing Access to CONFIGURATION Mode Commands61
  - Allowing Access to Different Modes61
  - Applying a Privilege Level to a Username63
  - Applying a Privilege Level to a Terminal Line63
- Configuring Logging63
  - Audit and Security Logs64
  - No Logging Console64
  - Configuring Logging Format66
  - Display the Logging Buffer and the Logging Configuration66
  - Setting up a Secure Connection to a Syslog Server67
  - Sending System Messages to a Syslog Server68
- Track Login Activity68
  - Restrictions for Tracking Login Activity68
  - Configuring Login Activity Tracking68
  - Display Login Statistics69
- Limit Concurrent Login Sessions70
  - Restrictions for Limiting the Number of Concurrent Sessions70
  - Configuring Concurrent Session Limit71
  - Enabling the System to Clear Existing Sessions71
- Enabling Secured CLI Mode72
- Log Messages in the Internal Buffer72
  - Configuration Task List for System Log Management72
- Disabling System Logging72
- Sending System Messages to a Syslog Server73
  - Configuring a UNIX System as a Syslog Server73
- Changing System Logging Settings73
- Display the Logging Buffer and the Logging Configuration74
- Configuring a UNIX Logging Facility Level75
- Synchronizing Log Messages76
- Enabling Timestamp on Syslog Messages76
- File Transfer Services77
  - Configuration Task List for File Transfer Services77
  - Enabling the FTP Server77
  - Configuring FTP Server Parameters77
  - Configuring FTP Client Parameters78
- Terminal Lines78
  - Denying and Permitting Access to a Terminal Line79
  - Configuring Login Authentication for Terminal Lines80
- Setting Timeout for EXEC Privilege Mode81
- Using Telnet to Get to Another Network Device81
- Lock CONFIGURATION Mode82
  - Viewing the Configuration Lock Status82
- LPC Bus Quality Degradation82
  - LBQA (LPC Bus Quality Analyzer) Failure Detection Mode83
- Reloading the System83
- 802.1X86
  - Port-Authentication Process87
    - EAP over RADIUS87
  - Configuring 802.1X88
    - Related Configuration Tasks88
  - Important Points to Remember88
  - Configuring Dot1X Profile89
  - Configuring MAC Addresses for a Do1X Profile89
  - Configuring the Static MAB and MAB Profile89
  - Configuring Critical VLAN90
  - Enabling 802.1X92
  - Configuring Request Identity Re-Transmissions93
    - Configuring a Quiet Period after a Failed Authentication94
  - Forcibly Authorizing or Unauthorizing a Port95
  - Re-Authenticating a Port95
  - Configuring Timeouts96
  - Configuring Dynamic VLAN Assignment with Port Authentication97
  - Guest and Authentication-Fail Vlans98
    - Configuring a Guest VLAN99
    - Configuring an Authentication-Fail VLAN99
6 Access Control List (ACL) VLAN Groups and Content Addressable Memory (CAM)101
- Optimizing CAM Utilization During the Attachment of Acls to Vlans101
- Guidelines for Configuring ACL VLAN Groups102
- Configuring ACL VLAN Groups and Configuring FP Blocks for VLAN Parameters102
  - Configuring ACL VLAN Groups102
  - Configuring FP Blocks for VLAN Parameters103
- Viewing CAM Usage104
- Allocating FP Blocks for VLAN Processes105
7 Access Control Lists (Acls)107
- IP Access Control Lists (Acls)108
  - CAM Usage109
  - Implementing Acls on Dell Networking os109
- Important Points to Remember111
- IP Fragment Handling117
  - IP Fragments ACL Examples117
  - Layer 4 ACL Rules Examples117
- Configure a Standard IP ACL118
  - Configuring a Standard IP ACL Filter119
- Configure an Extended IP ACL120
  - Configuring Filters with a Sequence Number120
  - Configuring Filters Without a Sequence Number121
- Configure Layer 2 and Layer 3 Acls122
- Assign an IP ACL to an Interface123
- Applying an IP ACL123
  - Counting ACL Hits124
- Configure Ingress Acls124
- Configure Egress Acls124
  - Applying Egress Layer 3 Acls (Control-Plane)125
- IP Prefix Lists126
  - Implementation Information126
  - Configuration Task List for Prefix Lists126
- ACL Resequencing130
  - Resequencing an ACL or Prefix List130
- Route Maps132
  - Implementation Information132
- Logging of ACL Processes132
  - Guidelines for Configuring ACL Logging133
  - Configuring ACL Logging133
- Flow-Based Monitoring134
  - Behavior of Flow-Based Monitoring134
  - Enabling Flow-Based Monitoring136
8 Bidirectional Forwarding Detection (BFD)138
- How BFD Works138
- Important Points to Remember143
- Configure BFD143
9 Border Gateway Protocol Ipv4 (Bgpv4)167
- Autonomous Systems (AS)167
- Sessions and Peers169
  - Establish a Session169
  - Peer Groups170
- Route Reflectors170
- BGP Attributes171
- Multiprotocol BGP176
- Implement BGP with Dell Networking os177
- Configuration Information182
- BGP Configuration182
- Enabling MBGP Configurations215
  - Configure Ipv6 NH Automatically for Ipv6 Prefix Advertised over Ipv4 Neighbor216
- BGP Regular Expression Optimization216
- Debugging BGP216
- Sample Configurations219
10 Content Addressable Memory (CAM)226
- CAM Allocation226
- Test CAM Usage228
- View CAM-ACL Settings228
- View CAM Usage230
- CAM Optimization230
- Troubleshoot CAM Profiling230
  - Qos CAM Region Limitation230
11 Control Plane Policing (Copp)231
- Configure Control Plane Policing232
12 Dynamic Host Configuration Protocol (DHCP)242
- DHCP Packet Format and Options242
- Assign an IP Address Using DHCP244
- Implementation Information245
- Configure the System to be a DHCP Server245
- Configure the System to be a Relay Agent249
- Configure the System to be a DHCP Client251
- Configure the System for User Port Stacking (Option 230)254
- Configure Secure DHCP254
- Source Address Validation261
13 Equal Cost Multi-Path (ECMP)264
- ECMP for Flow-Based Affinity264
- Link Bundle Monitoring265
14 FIPS Cryptography268
- Configuration Tasks268
- Preparing the System268
- Enabling FIPS Mode269
- Generating Host-Keys269
- Monitoring FIPS Mode Status269
- Disabling FIPS Mode270
15 Force10 Resilient Ring Protocol (FRRP)271
- Protocol Overview271
- Implementing FRRP275
- FRRP Configuration275
- Troubleshooting FRRP279
  - Configuration Checks279
- Sample Configuration and Topology279
- FRRP Support on VLT280
  - Example Scenario281
  - Important Points to Remember282
16 GARP VLAN Registration Protocol (GVRP)283
- Important Points to Remember283
- Configure GVRP284
  - Related Configuration Tasks284
- Enabling GVRP Globally285
- Enabling GVRP on a Layer 2 Interface285
- Configure GVRP Registration285
- Configure a GARP Timer286
- RPM Redundancy286
17 High Availability (HA)288
- Component Redundancy288
- Pre-Configuring a Stack Unit Slot290
- Removing a Provisioned Logical Stack Unit290
- Hitless Behavior291
- Graceful Restart291
- Software Resiliency291
- Hot-Lock Behavior292
- System Log292
18 Internet Group Management Protocol (IGMP)293
- IGMP Implementation Information293
- IGMP Protocol Overview293
- Configure IGMP298
  - Related Configuration Tasks298
- Viewing IGMP Enabled Interfaces299
- Selecting an IGMP Version299
- Viewing IGMP Groups299
- Show Ip Igmp Groups300
- Adjusting Timers300
  - Adjusting Query and Response Timers300
- Preventing a Host from Joining a Group301
- Enabling IGMP Immediate-Leave304
- IGMP Snooping304
- Fast Convergence after MSTP Topology Changes307
- Egress Interface Selection (EIS) for HTTP and IGMP Applications307
- Designating a Multicast Router Interface314
19 Interfaces316
- Basic Interface Configuration316
- Advanced Interface Configuration316
- Interface Types317
- View Basic Interface Information317
- Show Interfaces317
- Resetting an Interface to Its Factory Default State319
- Enabling a Physical Interface319
- Enabling Energy Efficient Ethernet320
- View EEE Information320
- Clear EEE Counters325
- Physical Interfaces325
  - Configuration Task List for Physical Interfaces325
  - Overview of Layer Modes326
  - Configuring Layer 2 (Data Link) Mode326
  - Configuring Layer 2 (Interface) Mode327
  - Configuring Layer 3 (Network) Mode327
  - Configuring Layer 3 (Interface) Mode327
- Egress Interface Selection (EIS)328
  - Important Points to Remember328
  - Configuring EIS328
- Management Interfaces329
  - Configuring Management Interfaces329
  - Configuring a Management Interface on an Ethernet Port330
- VLAN Interfaces331
- Loopback Interfaces332
- Null Interfaces332
- Port Channel Interfaces333
  - Port Channel Definition and Standards333
  - Port Channel Benefits333
  - Port Channel Implementation333
  - Interfaces in Port Channels334
  - Configuration Tasks for Port Channel Interfaces334
  - Creating a Port Channel334
  - Adding a Physical Interface to a Port Channel335
  - Reassigning an Interface to a New Port Channel336
  - Configuring the Minimum Oper up Links in a Port Channel337
  - Adding or Removing a Port Channel from a VLAN337
  - Assigning an IP Address to a Port Channel339
  - Deleting or Disabling a Port Channel339
  - Load Balancing through Port Channels339
  - Changing the Hash Algorithm339
- Bulk Configuration341
  - Interface Range341
  - Bulk Configuration Examples341
- Defining Interface Range Macros343
  - Define the Interface Range343
  - Choosing an Interface-Range Macro343
- Monitoring and Maintaining Interfaces343
  - Maintenance Using TDR344
- Configuring Wavelength for 10-Gigabit SFP+ Optics345
- Link Dampening345
  - Important Points to Remember346
  - Enabling Link Dampening346
- Link Bundle Monitoring347
- Using Ethernet Pause Frames for Flow Control348
  - Enabling Pause Frames349
- Configure the MTU Size on an Interface349
- Port-Pipes350
- Auto-Negotiation on Ethernet Interfaces350
  - Setting the Speed of Ethernet Interfaces350
  - Set Auto-Negotiation Options352
- View Advanced Interface Information352
  - Configuring the Interface Sampling Size353
- Configuring the Traffic Sampling Size Globally354
- Dynamic Counters356
  - Clearing Interface Counters356
20 Internet Protocol Security (Ipsec)358
- Configuring Ipsec358
21 Ipv4 Routing360
- IP Addresses361
  - Implementation Information361
- Configuration Tasks for IP Addresses361
- Assigning IP Addresses to an Interface361
- Configuring Static Routes362
- Configure Static Routes for the Management Interface363
- Ipv4 Path MTU Discovery Overview364
- Using the Configured Source IP Address in ICMP Messages364
  - Configuring the ICMP Source Interface364
- Configuring the Duration to Establish a TCP Connection365
- Enabling Directed Broadcast365
- Resolution of Host Names365
- Enabling Dynamic Resolution of Host Names366
- Specifying the Local System Domain and a List of Domains366
- Configuring DNS with Traceroute367
- Arp367
- Configuration Tasks for ARP368
- Configuring Static ARP Entries368
- Enabling Proxy ARP368
- Clearing ARP Cache369
- ARP Learning Via Gratuitous ARP369
- Enabling ARP Learning Via Gratuitous ARP369
- ARP Learning Via ARP Request369
- Configuring ARP Retries370
- Icmp371
- Configuration Tasks for ICMP371
- Enabling ICMP Unreachable Messages371
- UDP Helper371
  - Configure UDP Helper371
  - Important Points to Remember372
- Enabling UDP Helper372
- Configuring a Broadcast Address372
- Configurations Using UDP Helper373
- UDP Helper with Broadcast-All Addresses373
- UDP Helper with Subnet Broadcast Addresses374
- UDP Helper with Configured Broadcast Addresses374
- UDP Helper with no Configured Broadcast Addresses375
- Troubleshooting UDP Helper375
22 Ipv6 Routing376
- Protocol Overview376
- Implementing Ipv6 with Dell Networking os382
- Icmpv6383
- Path MTU Discovery384
- Ipv6 Neighbor Discovery384
  - Ipv6 Neighbor Discovery of MTU Packets385
- Configuration Task List for Ipv6 RDNSS385
- Secure Shell (SSH) over an Ipv6 Transport387
- Configuration Tasks for Ipv6388
- Configuring Ipv6 RA Guard394
  - Configuring Ipv6 RA Guard on an Interface395
  - Monitoring Ipv6 RA Guard396
23 Intermediate System to Intermediate System397
- IS-IS Protocol Overview397
- IS-IS Addressing397
- Multi-Topology IS-IS398
- Graceful Restart399
  - Timers399
- Implementation Information399
- Configuration Information400
- IS-IS Metric Styles415
- Configure Metric Values415
- Sample Configurations418
24 Link Aggregation Control Protocol (LACP)420
- Introduction to Dynamic Lags and LACP420
- LACP Configuration Tasks422
- Shared LAG State Tracking424
  - Configuring Shared LAG State Tracking424
  - Important Points about Shared LAG State Tracking426
- LACP Basic Configuration Example426
  - Configure a LAG on ALPHA426
25 Layer 2435
- Manage the MAC Address Table435
- MAC Learning Limit436
- NIC Teaming440
- Configure Redundant Pairs441
  - Important Points about Configuring Redundant Pairs443
- Far-End Failure Detection444
26 Link Layer Discovery Protocol (LLDP)449
- 802.1AB (LLDP) Overview449
  - Protocol Data Units449
- Optional Tlvs450
  - Management Tlvs450
- TIA-1057 (LLDP-MED) Overview452
  - TIA Organizationally Specific Tlvs452
- Configure LLDP456
- CONFIGURATION Versus INTERFACE Configurations457
- Enabling LLDP457
  - Disabling and Undoing LLDP458
- Enabling LLDP on Management Ports458
  - Disabling and Undoing LLDP on Management Ports458
- Advertising Tlvs458
- Viewing the LLDP Configuration460
- Viewing Information Advertised by Adjacent LLDP Neighbors460
  - Examples of Viewing Information Advertised by Neighbors461
- Configuring LLDPDU Intervals462
- Configuring LLDP Notification Interval463
- Configuring Transmit and Receive Mode463
- Configuring the Time to Live Value464
- Debugging LLDP465
- Relevant Management Objects466
27 Microsoft Network Load Balancing471
- NLB Unicast Mode Scenario471
- NLB Multicast Mode Scenario471
- Limitations of the NLB Feature472
- Microsoft Clustering472
- Enable and Disable VLAN Flooding472
- Configuring a Switch for NLB472
  - Enabling a Switch for Multicast NLB473
28 Multicast Source Discovery Protocol (MSDP)474
- Protocol Overview474
- Anycast RP475
- Implementation Information476
- Configure Multicast Source Discovery Protocol476
  - Related Configuration Tasks476
- Enable MSDP480
- Manage the Source-Active Cache481
- Accept Source-Active Messages that Fail the RFP Check482
- Specifying Source-Active Messages485
- Limiting the Source-Active Messages from a Peer486
- Preventing MSDP from Caching a Local Source486
- Preventing MSDP from Caching a Remote Source487
- Preventing MSDP from Advertising a Local Source487
- Logging Changes in Peership States488
- Terminating a Peership488
- Clearing Peer Statistics489
- Debugging MSDP489
- MSDP with Anycast RP490
- Configuring Anycast RP491
  - Reducing Source-Active Message Flooding492
  - Specifying the RP Address Used in SA Messages492
- MSDP Sample Configurations494
29 Multiple Spanning Tree Protocol (MSTP)497
- Protocol Overview497
- Spanning Tree Variations498
  - Implementation Information498
- Configure Multiple Spanning Tree Protocol498
  - Related Configuration Tasks499
- Enable Multiple Spanning Tree Globally499
- Adding and Removing Interfaces499
- Creating Multiple Spanning Tree Instances500
- Influencing MSTP Root Selection501
- Interoperate with Non-Dell Bridges501
- Changing the Region Name or Revision502
- Modifying Global Parameters502
- Modifying the Interface Parameters503
- Configuring an Edgeport504
- Flush MAC Addresses after a Topology Change505
- MSTP Sample Configurations505
  - Router 1 Running-Configurationrouter 2 Running-Configurationrouter 3 Running-Configurationsftos Example Running-Configuration506
- Debugging and Verifying MSTP Configurations509
30 Multicast Features511
- Enabling IP Multicast511
- Implementation Information511
- Multicast Policies512
  - Ipv4 Multicast Policies512
- Understanding Multicast Traceroute (Mtrace)519
  - Important Points to Remember520
- Printing Multicast Traceroute (Mtrace) Paths520
- Supported Error Codes521
- Mtrace Scenarios522
31 Object Tracking528
- Object Tracking Overview528
- Object Tracking Configuration531
- Displaying Tracked Objects537
32 Open Shortest Path First (Ospfv2 and Ospfv3)539
- Protocol Overview539
- OSPF with Dell Networking os545
- Configuration Information548
  - Configuration Task List for Ospfv2 (OSPF for Ipv4)548
- Configuration Task List for Ospfv3 (OSPF for Ipv6)562
33 Policy-Based Routing (PBR)577
- Overview577
- Implementing PBR578
- Configuration Task List for Policy-Based Routing578
- Sample Configuration583
  - Create the Redirect-List Goldassign Redirect-List GOLD to Interface 2/11View Redirect-List GOLD584
34 PIM Sparse-Mode (PIM-SM)587
- Implementation Information587
- Protocol Overview587
- Configuring PIM-SM588
  - Related Configuration Tasks589
- Enable PIM-SM589
- Configuring S,G Expiry Timers590
- Configuring a Static Rendezvous Point591
  - Overriding Bootstrap Router Updates591
- Configuring a Designated Router591
- Creating Multicast Boundaries and Domains592
35 PIM Source-Specific Mode (PIM-SSM)593
- Implementation Information593
  - Important Points to Remember593
- Configure PIM-SSM594
  - Related Configuration Tasks594
- Enabling PIM-SSM594
- Use PIM-SSM with IGMP Version 2 Hosts594
  - Configuring PIM-SSM with Igmpv2595
- Electing an RP Using the BSR Mechanism596
  - Enabling RP to Server Specific Multicast Groups596
36 Port Monitoring598
- Important Points to Remember598
- Port Monitoring599
- Configuring Port Monitoring601
- Configuring Monitor Multicast Queue602
- Enabling Flow-Based Monitoring603
- Remote Port Mirroring604
- Encapsulated Remote Port Monitoring610
- ERPM Behavior on a Typical Dell Networking os612
  - Decapsulation of ERPM Packets at the Destination IP/ Analyzer612
- Port Monitoring on VLT613
37 Private Vlans (PVLAN)616
- Private VLAN Concepts616
- Using the Private VLAN Commands617
- Configuration Task List618
- Private VLAN Configuration Example622
- Inspecting the Private VLAN Configuration623
38 Per-VLAN Spanning Tree Plus (PVST+)625
- Protocol Overview625
- Implementation Information626
- Configure Per-VLAN Spanning Tree Plus626
  - Related Configuration Tasks626
- Enabling PVST626
- Disabling PVST627
- Influencing PVST+ Root Selection627
- Modifying Global PVST+ Parameters629
- Modifying Interface PVST+ Parameters630
- Configuring an Edgeport631
- PVST+ in Multi-Vendor Networks631
- Enabling PVST+ Extend System ID631
- PVST+ Sample Configurations632
39 Quality of Service (Qos)635
- Implementation Information637
- Port-Based Qos Configurations637
- Policy-Based Qos Configurations640
- DSCP Color Maps650
- Enabling Qos Rate Adjustment652
- Enabling Strict-Priority Queueing653
- Weighted Random Early Detection653
- Pre-Calculating Available Qos CAM Space656
- Configuring Weights and ECN for WRED657
  - Global Service Pools with WRED and ECN Settings658
- Configuring WRED and ECN Attributes659
- Guidelines for Configuring ECN for Classifying and Color-Marking Packets659
- Sample Configuration to Mark Non-Ecn Packets as "Yellow" with Multiple Traffic Class660
  - Classifying Incoming Packets Using ECN and Color-Marking660
  - Sample Configuration to Mark Non-Ecn Packets as "Yellow" with Single Traffic Class662
- Applying Layer 2 Match Criteria on a Layer 3 Interface663
- Applying DSCP and VLAN Match Criteria on a Service Queue664
- Classifying Incoming Packets Using ECN and Color-Marking665
- Guidelines for Configuring ECN for Classifying and Color-Marking Packets666
- Sample Configuration to Mark Non-Ecn Packets as "Yellow" with Multiple Traffic Class667
- Sample Configuration to Mark Non-Ecn Packets as "Yellow" with Single Traffic Class667
40 Routing Information Protocol (RIP)669
- Protocol Overview669
  - Ripv1669
  - Ripv2669
- Implementation Information670
- Configuration Information670
  - Configuration Task List670
  - RIP Configuration Example676
41 Remote Monitoring (RMON)682
- Implementation Information682
- Fault Recovery682
42 Rapid Spanning Tree Protocol (RSTP)686
- Protocol Overview686
- Configuring Rapid Spanning Tree686
  - Related Configuration Tasks686
- Important Points to Remember686
  - RSTP and VLT687
- Configuring Interfaces for Layer 2 Mode687
- Enabling Rapid Spanning Tree Protocol Globally688
- Adding and Removing Interfaces690
- Modifying Global Parameters690
  - Enabling SNMP Traps for Root Elections and Topology Changes692
- Modifying Interface Parameters692
- Influencing RSTP Root Selection692
- Configuring an Edgeport693
- Configuring Fast Hellos for Link State Detection694
43 Software-Defined Networking (SDN)695
44 Security696
- AAA Accounting696
  - Configuration Task List for AAA Accounting696
- AAA Authentication698
  - Configuration Task List for AAA Authentication699
- Obscuring Passwords and Keys702
- AAA Authorization702
  - Privilege Levels Overview702
  - Configuration Task List for Privilege Levels703
- Radius707
- Tacacs712
- Protection from TCP Tiny and Overlapping Fragment Attacks715
- Enabling SCP and SSH715
- Telnet723
- VTY Line and Access-Class Configuration723
- Role-Based Access Control725
- Two Factor Authentication (2FA)736
- Configuring the System to Drop Certain ICMP Reply Messages737
45 Service Provider Bridging739
- VLAN Stacking739
- VLAN Stacking Packet Drop Precedence748
- Dynamic Mode Cos for VLAN Stacking750
  - Mapping C-Tag to S-Tag Dot1P Values751
- Layer 2 Protocol Tunneling752
- Provider Backbone Bridging755
46 Sflow756
- Overview756
- Implementation Information756
  - Important Points to Remember757
- Enabling Extended Sflow757
- Show Sflow757
- Enabling and Disabling Sflow on an Interface758
- Enabling Sflow Max-Header Size Extended758
- Sflow Show Commands759
- Configuring Specify Collectors761
- Changing the Polling Intervals761
- Back-Off Mechanism761
- Sflow on LAG Ports762
- Enabling Extended Sflow762
  - Important Points to Remember763
47 Simple Network Management Protocol (SNMP)764
- Protocol Overview765
- Implementation Information765
- Snmpv3 Compliance with FIPS765
- Configuration Task List for SNMP766
  - Related Configuration Tasks766
- Important Points to Remember767
- Set up SNMP767
  - Creating a Community767
  - Setting up User-Based Security (Snmpv3)767
- Reading Managed Object Values769
- Writing Managed Object Values769
- Configuring Contact and Location Information Using SNMP770
- Subscribing to Managed Object Value Updates Using SNMP770
- Enabling a Subset of SNMP Traps771
- Enabling an SNMP Agent to Notify Syslog Server Failure773
- Copy Configuration Files Using SNMP774
  - Copying a Configuration File775
  - Copying Configuration Files Via SNMP776
  - Copying the Startup-Config Files to the Running-Config777
  - Copying the Startup-Config Files to the Server Via FTP777
  - Copying the Startup-Config Files to the Server Via TFTP777
  - Copy a Binary File to the Startup-Configuration778
  - Additional MIB Objects to View Copy Statistics778
  - Obtaining a Value for MIB Objects779
- MIB Support for Power Monitoring779
- MIB Support to Display the Available Memory Size on Flash780
  - Viewing the Available Flash Memory Size780
- MIB Support to Display the Software Core Files Generated by the System781
  - Viewing the Software Core Files Generated by the System781
- SNMP Support for WRED Green/Yellow/Red Drop Counters782
- MIB Support to Display the Available Partitions on Flash783
  - Viewing the Available Partitions on Flash783
- MIB Support to Display Egress Queue Statistics784
  - Viewing the ECMP Group Count Information784
- MIB Support for Entaliasmappingtable787
  - Viewing the Entaliasmappingtable MIB787
- MIB Support for LAG788
  - Viewing the LAG MIB789
- MIB Support to Display LLDP Tlvs789
  - Viewing the Details of LLDP Tlvs790
- MIB Support for LLDP Notification Interval790
- Manage Vlans Using SNMP791
  - Creating a VLAN791
  - Assigning a VLAN Alias791
  - Displaying the Ports in a VLAN791
  - Add Tagged and Untagged Ports to a VLAN792
- Managing Overload on Startup793
- Enabling and Disabling a Port Using SNMP794
- Fetch Dynamic MAC Entries Using SNMP794
- Deriving Interface Indices795
- Monitor Port-Channels796
- Enabling an SNMP Agent to Notify Syslog Server Failure797
- Troubleshooting SNMP Operation798
- Transceiver Monitoring798
48 Stacking800
- Stacking Overview800
- Important Points to Remember805
- Stacking Installation Tasks806
- Stacking Configuration Tasks813
- Verify a Stack Configuration817
  - Displaying the Status of Stacking Ports817
- Remove Units or Front End Ports from a Stack818
  - Removing a Unit from a Stack818
  - Removing Front End Port Stacking819
- Troubleshoot a Stack819
  - Recover from Stack Link Flaps820
  - Recover from a Card Problem State on a Stack820
49 Storm Control822
- Configure Storm Control822
  - Configuring Storm Control from INTERFACE Mode822
  - Configuring Storm Control from CONFIGURATION Mode823
50 Spanning Tree Protocol (STP)824
- Protocol Overview824
- Configure Spanning Tree825
  - Related Configuration Tasks825
- Important Points to Remember825
- Configuring Interfaces for Layer 2 Mode826
- Enabling Spanning Tree Protocol Globally827
- Adding an Interface to the Spanning Tree Group829
- Modifying Global Parameters829
- Modifying Interface STP Parameters830
- Enabling Portfast830
  - Prevent Network Disruptions with BPDU Guard831
- Selecting STP Root833
- STP Root Guard833
  - Root Guard Scenario833
  - Configuring Root Guard834
- Enabling SNMP Traps for Root Elections and Topology Changes835
- Configuring Spanning Trees as Hitless835
- STP Loop Guard835
  - Configuring Loop Guard837
- Displaying STP Guard Configuration837
51 Supportassist839
- Configuring Supportassist Using a Configuration Wizard840
- Configuring Supportassist Manually840
- Configuring Supportassist Activity842
- Configuring Supportassist Company843
- Configuring Supportassist Person844
- Configuring Supportassist Server844
- Viewing Supportassist Configuration845
52 System Time and Date847
- Network Time Protocol847
- Dell Networking os Time and Date853
53 Tunneling857
- Configuring a Tunnel857
- Configuring Tunnel Keepalive Settings858
- Configuring a Tunnel Interface858
- Configuring Tunnel Allow-Remote Decapsulation859
- Configuring the Tunnel Source Anylocal859
54 Uplink Failure Detection (UFD)861
- Feature Description861
- How Uplink Failure Detection Works862
- UFD and NIC Teaming863
- Important Points to Remember863
- Configuring Uplink Failure Detection864
- Clearing a UFD-Disabled Interface865
- Displaying Uplink Failure Detection866
- Sample Configuration: Uplink Failure Detection868
55 Upgrade Procedures870
- Get Help with Upgrades870
56 Virtual Lans (Vlans)871
- Default VLAN872
- Port-Based Vlans872
- Vlans and Port Tagging873
- Configuration Task List873
- Configuring Native Vlans876
- Enabling Null VLAN as the Default VLAN877
57 Virtual Link Trunking (VLT)878
- Overview878
- Configure Virtual Link Trunking885
- RSTP Configuration897
- PVST+ Configuration908
  - Sample PVST+ Configuration908
- Peer Routing Configuration Example909
- Evlt Configuration Example919
  - Evlt Configuration Step Examples919
- PIM-Sparse Mode Configuration Example921
- Verifying a VLT Configuration922
- Additional VLT Sample Configurations925
- Troubleshooting VLT927
- Reconfiguring Stacked Switches as VLT928
- Specifying VLT Nodes in a PVLAN928
- Configuring a VLT VLAN or LAG in a PVLAN932
  - Creating a VLT LAG or a VLT VLAN932
  - Associating the VLT LAG or VLT VLAN in a PVLAN933
- Proxy ARP Capability on VLT Peer Nodes934
  - Working of Proxy ARP for VLT Peer Nodes934
- VLT Nodes as Rendezvous Points for Multicast Resiliency935
- Configuring VLAN-Stack over VLT935
- Ipv6 Peer Routing in VLT Domains Overview939
58 VLT Proxy Gateway945
- Proxy Gateway in VLT Domains945
- Configuring a Static VLT Proxy Gateway950
- Configuring an LLDP VLT Proxy Gateway950
- VLT Proxy Gateway Sample Topology950
59 Virtual Routing and Forwarding (VRF)955
- VRF Overview955
- VRF Configuration Notes956
  - Dhcp958
- VRF Configuration958
- Sample VRF Configuration962
- Route Leaking Vrfs967
- Dynamic Route Leaking968
  - Configuring Route Leaking Without Filtering Criteria968
  - Configuring Route Leaking with Filtering971
60 Virtual Router Redundancy Protocol (VRRP)974
- VRRP Overview974
- VRRP Benefits975
- VRRP Implementation975
- VRRP Configuration976
  - Configuration Task List976
  - Setting VRRP Initialization Delay985
- Sample Configurations986
61 Debugging and Diagnostics998
- Offline Diagnostics998
  - Important Points to Remember998
  - Running Offline Diagnostics998
- Trace Logs999
- Auto Save on Crash or Rollover999
- Last Restart Reason999
- Hardware Watchdog Timer1000
- Using the Show Hardware Commands1000
- Enabling Environmental Monitoring1001
- Troubleshooting Packet Loss1004
- Enabling Application Core Dumps1011
- Mini Core Dumps1011
- Enabling TCP Dumps1012
62 Standards Compliance1013
- IEEE Compliance1013
- RFC and I-D Compliance1014
- MIB Location1027
509 V31028
- Introduction to X.509V3 Certification1028
- X.509V3 Support in Dell Networking os1029
- Information about Installing CA Certificates1031
  - Installing CA Certificate1031
- Information about Creating Certificate Signing Requests (CSR)1031
  - Creating Certificate Signing Requests (CSR)1032
- Information about Installing Trusted Certificates1033
  - Installing Trusted Certificates1033
- Transport Layer Security (TLS)1033
  - Syslog over TLS1034
- Online Certificate Status Protocol (OSCP)1034
- Verifying Certificates1035
  - Verifying Server Certificates1036
  - Verifying Client Certificates1036
- Event Logging1036

Rack Units	1U
Form Factor	Rack-mountable
Input Voltage	100-240V AC
Power Supply	2 hot-swappable power supplies
Management	CLI, Web, SNMP
Product Type	Switch
MAC Address Table Size	32K entries
Jumbo Frame Support	Yes
Latency	< 3 microseconds
Ports	48 x 1GbE RJ45, 4 x 10GbE SFP+

Dell S3048-ON User Manual

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