- Notes, cautions, and warnings
- About this Guide
- Before You Start
- Configuration Fundamentals
- Getting Started
- Console Access
- Accessing the CLI Interface and Running Scripts Using SSH
- Boot Process
- Default Configuration
- Configuring a Host Name
- Configuring a Unique Host Name on the System
- Accessing the System Remotely
- Configuring the Enable Password
- Configuration File Management
- Managing the File System
- View the Command History
- Using HTTP for File Transfers
- Upgrading and Downgrading the Dell Networking OS
- Verify Software Images Before Installation
- Deploying FN I/O Module
- Management
- Configuring Privilege Levels
- Configuring Logging
- Display the Logging Buffer and the Logging Configuration
- Log Messages in the Internal Buffer
- Disabling System Logging
- Sending System Messages to a Syslog Server
- Changing System Logging Settings
- Display the Logging Buffer and the Logging Configuration
- Configuring a UNIX Logging Facility Level
- Synchronizing Log Messages
- Enabling Timestamp on Syslog Messages
- Enabling Secure Management Mode
- File Transfer Services
- Terminal Lines
- Setting Time Out of EXEC Privilege Mode
- Using Telnet to get to Another Network Device
- Lock CONFIGURATION Mode
- Limit Concurrent Login Sessions
- Track Login Activity
- Recovering from a Forgotten Password
- Recovering from a Forgotten Enable Password
- Recovering from a Failed Start
- 802.1X
- Access Control List (ACL) VLAN Groups and Content Addressable Memory (CAM)
- Access Control
Lists (ACLs)
- IP Access Control Lists (ACLs)
- Implementing ACL on the Dell Networking OS
- ACLs and VLANs
- ACL Optimization
- Determine the Order in which ACLs are Used to Classify Traffic
- IP Fragment Handling
- IP Fragments ACL Examples
- Layer 4 ACL Rules Examples
- Configure a Standard IP ACL
- Configuring a Standard IP ACL Filter
- Configure an Extended IP ACL
- Configuring Filters with a Sequence Number
- Configuring Filters Without a Sequence Number
- Established Flag
- Configure Layer 2 and Layer 3 ACLs
- Assign an IP ACL to an Interface
- Applying an IP ACL
- Counting ACL Hits
- Configure Ingress ACLs
- Configure Egress ACLs
- Applying Egress Layer 3 ACLs (Control-Plane)
- IP Prefix Lists
- Configuration Task List for Prefix Lists
- Creating a Prefix List
- Creating a Prefix List Without a Sequence Number
- Viewing Prefix Lists
- Applying a Prefix List for Route Redistribution
- Applying a Filter to a Prefix List (OSPF)
- ACL Resequencing
- Resequencing an ACL or Prefix List
- Route Maps
- Important Points to Remember
- Configuration Task List for Route Maps
- Creating a Route Map
- Configure Route Map Filters
- Configuring Match Routes
- Configuring Set Conditions
- Configure a Route Map for Route Redistribution
- Configure a Route Map for Route Tagging
- Continue Clause
- Logging of ACL Processes
- Guidelines for Configuring ACL Logging
- Configuring ACL Logging
- Flow-Based Monitoring Support for ACLs
- Enabling Flow-Based Monitoring
- Bidirectional Forwarding Detection (BFD)
- Border Gateway
Protocol IPv4 (BGPv4)
- Autonomous Systems (AS)
- Sessions and Peers
- Route Reflectors
- BGP Attributes
- Multiprotocol BGP
- Implement BGP with the Dell Networking OS
- Configuration Information
- BGP Configuration
- Enabling BGP
- Configuring AS4 Number Representations
- Configuring Peer Groups
- Configuring BGP Fast Fail-Over
- Configuring Passive Peering
- Maintaining Existing AS Numbers During an AS Migration
- Allowing an AS Number to Appear in its Own AS Path
- Enabling Graceful Restart
- Enabling Neighbor Graceful Restart
- Filtering on an AS-Path Attribute
- Regular Expressions as Filters
- Redistributing Routes
- Enabling Additional Paths
- Configuring IP Community Lists
- Configuring an IP Extended Community List
- Filtering Routes with Community Lists
- Manipulating the COMMUNITY Attribute
- Changing MED Attributes
- Changing the LOCAL_PREFERENCE Attribute
- Changing the NEXT_HOP Attribute
- Changing the WEIGHT Attribute
- Enabling Multipath
- Filtering BGP Routes
- Configuring BGP Route Reflectors
- Aggregating Routes
- Configuring BGP Confederations
- Enabling Route Flap Dampening
- Changing BGP Timers
- Enabling BGP Neighbor Soft-Reconfiguration
- Route Map Continue
- Enabling MBGP Configurations
- Enabling BGP
- BGP Regular Expression Optimization
- Debugging BGP
- Sample Configurations
- Configuration Cloning
- Content Addressable Memory (CAM)
- Control Plane Policing (CoPP)
- Data Center
Bridging (DCB)
- Ethernet Enhancements in Data Center Bridging
- Priority-Based Flow Control
- Enhanced Transmission Selection
- Data Center Bridging Exchange Protocol (DCBx)
- Creating a DCB Map
- Data Center Bridging: Default Configuration
- Data Center Bridging in a Traffic Flow
- Data Center Bridging: Auto-DCB-Enable Mode
- Configuring Priority-Based Flow Control
- Configuring Enhanced Transmission Selection
- Hierarchical Scheduling in ETS Output Policies
- DCBx Operation
- Verifying the DCB Configuration
- QoS dot1p Traffic Classification and Queue Assignment
- Troubleshooting PFC, ETS, and DCBx Operation
- Dynamic Host Configuration Protocol (DHCP)
- Equal Cost Multi-Path (ECMP)
- FC FPORT
- FCoE Transit
- Fibre Channel over Ethernet
- Ensure Robustness in a Converged Ethernet Network
- FIP Snooping on Ethernet Bridges
- FIP Snooping in a Switch Stack
- Using FIP Snooping
- Important Points to Remember
- Enabling the FCoE Transit Feature
- Enable FIP Snooping on VLANs
- Configure the FC-MAP Value
- Configure a Port for a Bridge-to-Bridge Link
- Configure a Port for a Bridge-to-FCF Link
- Impact on Other Software Features
- FIP Snooping Prerequisites
- FIP Snooping Restrictions
- Configuring FIP Snooping
- Displaying FIP Snooping Information
- FCoE Transit Configuration Example
- FIPS Cryptography
- Force10 Resilient Ring Protocol (FRRP)
- GARP VLAN Registration Protocol (GVRP)
- FIP Snooping
- Internet Group Management Protocol (IGMP)
- Interfaces
- Interface Types
- View Basic Interface Information
- Configuring the Default Interface
- Enabling a Physical Interface
- Physical Interfaces
- Management Interfaces
- VLAN Interfaces
- Loopback Interfaces
- Null Interfaces
- VLAN Membership
- Port Channel
Interfaces
- Port Channel Definition and Standards
- Port Channel Benefits
- Port Channel Implementation
- 100/1000/10000 Mbps Interfaces in Port Channels
- Configuration Tasks for Port Channel Interfaces
- Creating a Port Channel
- Adding a Physical Interface to a Port Channel
- Reassigning an Interface to a New Port Channel
- Configuring the Minimum Oper Up Links in a Port Channel
- Adding or Removing a Port Channel from a VLAN
- Assigning an IP Address to a Port Channel
- Deleting or Disabling a Port Channel
- Load Balancing through Port Channels
- Changing the Hash Algorithm
- Server Ports
- Bulk Configuration
- Defining Interface Range Macros
- Monitoring and Maintaining Interfaces
- Splitting QSFP Ports to SFP+ Ports
- Configuring wavelength for 10–Gigabit SFP+ optics
- Converting a QSFP or QSFP+ Port to an SFP or SFP+ Port
- Layer 2 Flow Control Using Ethernet Pause Frames
- Configure MTU Size on an Interface
- Port-Pipes
- Auto-Negotiation on Ethernet Interfaces
- View Advanced Interface Information
- Enhanced Control of Remote Fault Indication Processing
- Internet Protocol Security (IPSec)
- IPv4 Routing
- IP Addresses
- IPv4 Path MTU Discovery Overview
- Using the Configured Source IP Address in ICMP Messages
- Configuring the Duration to Establish a TCP Connection
- Enabling Directed Broadcast
- Resolution of Host Names
- ARP
- ARP Learning via Gratuitous ARP
- ARP Learning via ARP Request
- Configuring ARP Retries
- ICMP
- UDP Helper
- Configurations Using UDP Helper
- Troubleshooting UDP Helper
- IPv6 Routing
- iSCSI Optimization
- Intermediate
System to Intermediate System
- IS-IS Protocol Overview
- IS-IS Addressing
- Multi-Topology IS-IS
- Graceful Restart
- Implementation Information
- Configuration
Information
- Configuration
Tasks for IS-IS
- Enabling IS-IS
- Configuring Multi-Topology IS-IS (MT IS-IS)
- Configuring IS-IS Graceful Restart
- Changing LSP Attributes
- Configuring the IS-IS Metric Style
- Configuring the IS-IS Cost
- Configuring the Distance of a Route
- Changing the IS-Type
- Controlling Routing Updates
- Distribute Routes
- Configuring Authentication Passwords
- Setting the Overload Bit
- Debugging IS-IS
- Configuration
Tasks for IS-IS
- IS-IS Metric Styles
- Configure Metric Values
- Sample Configurations
- Isolated Networks for Aggregators
- Link Aggregation
- How the LACP is Implemented on an Aggregator
- Link Aggregation Control Protocol (LACP)
- Configuring Auto LAG
- Configuring the Minimum Number of Links to be Up for Uplink LAGs to be Active
- Optimizing Traffic Disruption Over LAG Interfaces On IOA Switches in VLT Mode
- Preserving LAG and Port Channel Settings in Nonvolatile Storage
- Enabling the LACP link fallback member
- Enabling the Verification of Member Links Utilization in a LAG Bundle
- Monitoring the Member Links of a LAG Bundle
- Verifying LACP Operation and LAG Configuration
- Multiple Uplink LAGs with 10G Member Ports
- Layer 2
- Link Layer Discovery
Protocol (LLDP)
- Protocol Data Units
- Configure LLDP
- CONFIGURATION versus INTERFACE Configurations
- Enabling LLDP
- Advertising TLVs
- Optional TLVs
- LLDP Operation
- Viewing the LLDP Configuration
- Viewing Information Advertised by Adjacent LLDP Agents
- Configuring LLDPDU Intervals
- Configuring a Time to Live
- Clearing LLDP Counters
- Debugging LLDP
- Relevant Management Objects
- Microsoft Network Load Balancing
- Multicast Source
Discovery Protocol (MSDP)
- Anycast RP
- Implementation Information
- Configure the Multicast Source Discovery Protocol
- Enabling MSDP
- Manage the Source-Active Cache
- Accept Source-Active Messages that Fail the RFP Check
- Specifying Source-Active Messages
- Limiting the Source-Active Messages from a Peer
- Preventing MSDP from Caching a Local Source
- Preventing MSDP from Caching a Remote Source
- Preventing MSDP from Advertising a Local Source
- Logging Changes in Peership States
- Terminating a Peership
- Clearing Peer Statistics
- Debugging MSDP
- MSDP with Anycast RP
- Configuring Anycast RP
- MSDP Sample Configurations
- Multiple Spanning
Tree Protocol (MSTP)
- Spanning Tree Variations
- Implementation Information
- Configure Multiple Spanning Tree Protocol
- Enable Multiple Spanning Tree Globally
- Creating Multiple Spanning Tree Instances
- Influencing MSTP Root Selection
- Interoperate with Non-Dell Networking OS Bridges
- Changing the Region Name or Revision
- Modifying Global Parameters
- Enable BPDU Filtering Globally
- Modifying the Interface Parameters
- Configuring an EdgePort
- Flush MAC Addresses after a Topology Change
- MSTP Sample Configurations
- Debugging and Verifying MSTP Configurations
- Multicast Features
- Open Shortest
Path First (OSPFv2 and OSPFv3)
- Protocol Overview
- OSPF with the Dell Networking OS
- Configuration
Information
- Configuration
Task List for OSPFv2 (OSPF for IPv4)
- Enabling OSPFv2
- Assigning a Router ID
- Assigning an OSPFv2 Area
- Enable OSPFv2 on Interfaces
- Configuring Stub Areas
- Configuring LSA Throttling Timers
- Enabling Passive Interfaces
- Enabling Fast-Convergence
- Changing OSPFv2 Parameters on Interfaces
- Enabling OSPFv2 Authentication
- Enabling OSPFv2 Graceful Restart
- Creating Filter Routes
- Applying Prefix Lists
- Redistributing Routes
- Troubleshooting OSPFv2
- Configuration
Task List for OSPFv2 (OSPF for IPv4)
- Configuration
Task List for OSPFv3 (OSPF for IPv6)
- Enabling IPv6 Unicast Routing
- Assigning IPv6 Addresses on an Interface
- Assigning Area ID on an Interface
- Assigning OSPFv3 Process ID and Router ID Globally
- Configuring Stub Areas
- Configuring Passive-Interface
- Redistributing Routes
- Configuring a Default Route
- Enabling OSPFv3 Graceful Restart
- Displaying Graceful Restart
- OSPFv3 Authentication
Using IPsec
- OSPFv3 Authentication Using IPsec: Configuration Notes
- Configuring IPsec Authentication on an Interface
- Configuring IPsec Encryption on an Interface
- Configuring IPSec Authentication for an OSPFv3 Area
- Configuring IPsec Encryption for an OSPFv3 Area
- Displaying OSPFv3 IPsec Security Policies
- Troubleshooting OSPFv3
- Viewing Summary Information
- Policy-based Routing (PBR)
- PIM Sparse-Mode (PIM-SM)
- PIM Source-Specific Mode (PIM-SSM)
- Port Monitoring
- Private VLANs (PVLAN)
- Per-VLAN Spanning Tree Plus (PVST+)
- Quality of Service
(QoS)
- Implementation Information
- Port-Based QoS Configurations
- Guidelines for Configuring ECN for Classifying and Color-Marking Packets
- Policy-Based
QoS Configurations
- DSCP Color Maps
- Classify Traffic
- Create a QoS
Policy
- Creating an Input QoS Policy
- Configuring Policy-Based Rate Policing
- Setting a DSCP Value for Egress Packets
- Setting a dot1p Value for Egress Packets
- Creating an Output QoS Policy
- Configuring Policy-Based Rate Shaping
- Allocating Bandwidth to Queue
- Configure a Scheduler to Queue
- Setting DSCP Values for Egress Packets Based on Flow
- Specifying WRED Drop Precedence
- Create Policy
Maps
- Creating Input Policy Maps
- Applying a Class-Map or Input QoS Policy to a Queue
- Applying an Input QoS Policy to an Input Policy Map
- Honoring DSCP Values on Ingress Packets
- Honoring dot1p Values on Ingress Packets
- Enabling Fall Back to Trust Diffserve or dot1p
- Mapping dot1p Values to Service Queues
- Guaranteeing Bandwidth to dot1p-Based Service Queues
- Applying an Input Policy Map to an Interface
- Creating Output Policy Maps
- Applying an Output QoS Policy to a Queue
- Specifying an Aggregate QoS Policy
- Applying an Output Policy Map to an Interface
- Enabling QoS Rate Adjustment
- Enabling Strict-Priority Queueing
- Weighted Random Early Detection
- Routing Information Protocol (RIP)
- Remote Monitoring (RMON)
- Rapid Spanning
Tree Protocol (RSTP)
- Protocol Overview
- Configuring Rapid Spanning Tree
- Configuring Interfaces for Layer 2 Mode
- Enabling Rapid Spanning Tree Protocol Globally
- Adding and Removing Interfaces
- Modifying Global Parameters
- Enable BPDU Filtering Globally
- Modifying Interface Parameters
- Configuring an EdgePort
- Influencing RSTP Root Selection
- SNMP Traps for Root Elections and Topology Changes
- Configuring Fast Hellos for Link State Detection
- Security
- Service Provider Bridging
- sFlow
- Simple Network
Management Protocol (SNMP)
- Implementation Information
- Configuring the Simple Network Management Protocol
- Reading Managed Object Values
- Displaying the Ports in a VLAN using SNMP
- Fetching Dynamic MAC Entries using SNMP
- Deriving Interface Indices
- Monitor Port-Channels
- Entity MIBS
- SNMP Traps for Link Status
- Standard VLAN MIB
- MIB Support to Display the Available Memory Size on Flash
- MIB Support to Display the Software Core Files Generated by the System
- Stacking
- Storm Control
- Broadcast Storm Control
- Spanning Tree
Protocol (STP)
- Protocol Overview
- Configure Spanning Tree
- Configuring Interfaces for Layer 2 Mode
- Enabling Spanning Tree Protocol Globally
- Adding an Interface to the Spanning Tree Group
- Removing an Interface from the Spanning Tree Group
- Modifying Global Parameters
- Modifying Interface STP Parameters
- Enabling Port Fast
- Global BPDU Filtering
- Selecting STP Root
- STP Root Guard
- SNMP Traps for Root Elections and Topology Changes
- Displaying STP Guard Configuration
- System Time and Date
- Tunneling
- Uplink Failure
Detection (UFD)
- Feature Description
- How Uplink Failure Detection Works
- UFD and NIC Teaming
- Important Points to Remember
- Uplink Failure Detection (SMUX mode)
- Configuring Uplink Failure Detection (PMUX mode)
- Clearing a UFD-Disabled Interface (in PMUX mode)
- Displaying Uplink Failure Detection
- Sample Configuration: Uplink Failure Detection
- PMUX Mode of
the IO Aggregator
- I/O Aggregator (IOA) Programmable MUX (PMUX) Mode
- Configuring and Changing to PMUX Mode
- Configuring the Commands without a Separate User Account
- Virtual Link Trunking (VLT)
- NPIV Proxy Gateway
- Upgrade Procedures
- Virtual LANs (VLANs)
- Virtual Link
Trunking (VLT)
- Overview
- VLT Terminology
- Configure Virtual Link Trunking
- RSTP Configuration
- Preventing Forwarding Loops in a VLT Domain
- Sample RSTP Configuration
- Configuring VLT
- Configuring a VLT Interconnect
- Configuring a VLT Backup Link
- Configuring a VLT Port Delay Period
- Reconfiguring the Default VLT Settings (Optional)
- Connecting a VLT Domain to an Attached Access Device (Switch or Server)
- Configuring a VLT VLAN Peer-Down (Optional)
- Configure Multi-domain VLT (mVLT) (Optional)
- Verifying a VLT Configuration
- Connecting a VLT Domain
- PVST+ Configuration
- mVLT Configuration Example
- PIM-Sparse Mode Configuration Example
- Additional VLT Sample Configurations
- Troubleshooting VLT
- Specifying VLT Nodes in a PVLAN
- Configuring a VLT VLAN or LAG in a PVLAN
- Proxy ARP Capability on VLT Peer Nodes
- Configuring VLAN-Stack over VLT
- Virtual Router
Redundancy Protocol (VRRP)
- VRRP Overview
- VRRP Benefits
- VRRP Implementation
- VRRP Configuration
- Configuration Task List
- Setting VRRP Initialization Delay
- Sample Configurations
- Debugging and Diagnostics
- Standards Compliance
- FC Flex IO Modules
- FC Flex IO Modules
- Understanding and Working of the FC Flex IO Modules
- Data Center
Bridging (DCB)
- Ethernet Enhancements in Data Center Bridging
- Enabling Data Center Bridging
- QoS dot1p Traffic Classification and Queue Assignment
- Configure Enhanced Transmission Selection
- Configure a DCBx Operation
- Verifying the DCB Configuration
- PFC and ETS Configuration Examples
- Using PFC and ETS to Manage Data Center Traffic
- Fibre Channel over Ethernet for FC Flex IO Modules
- NPIV Proxy Gateway for FC Flex IO Modules
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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)
Configure MTU Size on an Interface
If a packet includes a Layer 2 header, the difference in bytes between the link MTU and IP MTU must be enough to include the Layer 2 header.
For example,
for VLAN packets, if the IP MTU is 1400, the Link MTU must be no less
than 1422:
1400-byte IP MTU + 22-byte VLAN Tag = 1422-byte link MTU
The MTU range is from 592 to 12000, with a default of 1500. IP MTU automatically configures.
The following table lists the various Layer 2 overheads found in the Dell Networking OS and the number of bytes.
| Layer 2 Overhead | Difference Between Link MTU and IP MTU |
|---|---|
| Ethernet (untagged) | 18 bytes |
| VLAN Tag | 22 bytes |
| Untagged Packet with VLAN-Stack Header | 22 bytes |
| Tagged Packet with VLAN-Stack Header | 26 bytes |
Link MTU and IP MTU considerations for port channels and VLANs are as follows.
Port Channels:
- All members must have the same link MTU value and the same IP MTU value.
- The port channel link MTU and IP MTU must be less than or equal to the link MTU and IP MTU values configured on the channel members.
For example, if the members have a link MTU of 2100 and an IP MTU 2000, the port channel’s MTU values cannot be higher than 2100 for link MTU or 2000 bytes for IP MTU.
VLANs:
- All members of a VLAN must have the same IP MTU value.
- Members can have different Link MTU values. Tagged members must have a link MTU 4–bytes higher than untagged members to account for the packet tag.
- The VLAN link MTU and IP MTU must be less than or equal to the link MTU and IP MTU values configured on the VLAN members.
For example, the VLAN contains tagged members with Link MTU of 1522 and IP MTU of 1500 and untagged members with Link MTU of 1518 and IP MTU of 1500. The VLAN’s Link MTU cannot be higher than 1518 bytes and its IP MTU cannot be higher than 1500 bytes.
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