Dell Command Line Reference Guide for the S4820T System 9.14.1.5The English title is: "Dell Command Line Reference Guide for the S4820T System, Version 9.14.1.5"

Summary

This reference guide provides comprehensive documentation for the product. The document includes detailed information about setup, configuration, operation, and maintenance of the monitor. It covers key features, specifications, installation procedures, troubleshooting steps, and best practices. The manual is designed for system administrators, IT professionals, and end users who need to deploy, manage, or operate the equipment effectively. Readers will find step-by-step instructions, technical diagrams, safety information, and reference materials to ensure proper usage and optimal performance.

Dell Command Line Reference Guide for the S4820T System 9.14.1.5
About this Guide
- Objectives
- Audience
- Conventions
- Information Icons
CLI Basics
- Accessing the Command Line
- Multiple Configuration Users
- Obtaining Help
- Navigating the CLI
- Using the no Command
- Filtering show Commands
- Enabling Software Features on Devices Using a Command Option
  - feature vrf
  - show feature
- Command Modes
File Management
- boot-access password
- boot system
- cd
- HTTP Copy via CLI
- copy
- delete
- dir
- format
- fsck flash
- generate hash
- mkdir
- mount nfs
- rmdir
- upgrade system
- rename
- root-access password
- restore factory-defaults
- show boot system
- show bootvar
- show file-systems
- show running-config
- show startup-config
- show os-version
- show version
- upgrade
- verified boot
- verified boot hash
- verified startup-config
- verify
Control and Monitoring
- asf-mode
- banner exec
- banner login
- banner motd
- cam-acl
- cam-acl-vlan
- clear average-power
- clear line
- configure
- disable
- do
- enable
- enable optic-info-update interval
- end
- exec-timeout
- exit
- ftp-server enable
- ftp-server topdir
- ftp-server username
- hostname
- ip ftp password
- ip ftp vrf
- ip ftp source-interface
- ip ftp username
- ip telnet server enable
- ip telnet server vrf
- ip telnet source-interface
- ip tftp source-interface
- ip tftp vrf
- line
- login concurrent-session
- login statistics
- motd-banner
- ping
- reload
- send
- service timestamps
- show alarms
- show cam-acl-vlan
- show command-history
- show cpu-traffic-stats
- show debugging
- show environment
- show inventory
- show login statistics
- show memory
- show processes cpu
- show processes ipc flow-control
- show processes memory
- show software ifm
- show system
- show tech-support
- ssh-peer-stack-unit
- telnet
- telnet-peer-stack-unit
- terminal length
- traceroute
- undebug all
- virtual-ip
- write
802.1X
- debug dot1x
- dot1x auth-fail-vlan
- dot1x auth-server
- dot1x auth-type mab-only
- dot1x authentication (Configuration)
- dot1x authentication (Interface)
- dot1x critical-vlan
- dot1x profile
- dot1x static-mab
- dot1x guest-vlan
- dot1x host-mode
- dot1x mac-auth-bypass
- dot1x max-eap-req
- dot1x max-supplicants
- dot1x port-control
- dot1x quiet-period
- dot1x reauthentication
- dot1x reauth-max
- dot1x server-timeout
- dot1x supplicant-timeout
- dot1x tx-period
- mac
- show dot1x cos-mapping interface
- show dot1x interface
- show dot1x profile
Access Control Lists (ACL)
- Commands Common to all ACL Types
  - remark
  - show config
- Common IP ACL Commands
  - access-class
  - clear counters ip access-group
  - ip access-group
  - ip control-plane egress-filter
  - show ip accounting access-list
- Standard IP ACL Commands
  - deny
  - ip access-list standard
  - permit
  - resequence access-list
  - resequence prefix-list ipv4
  - seq
- Extended IP ACL Commands
  - deny
  - deny icmp
  - deny tcp
  - deny udp
  - ip access-list extended
  - permit
  - permit tcp
  - permit udp
  - resequence access-list
  - resequence prefix-list ipv4
  - seq
- Common MAC Access List Commands
  - clear counters mac access-group
  - mac access-group
  - show mac access-lists
  - show mac accounting access-list
- Standard MAC ACL Commands
  - deny
  - mac access-list standard
  - permit
  - seq
- Extended MAC ACL Commands
  - deny
  - mac access-list extended
  - permit
  - seq
- IP Prefix List Commands
  - clear ip prefix-list
  - deny
  - ip prefix-list
  - permit
  - seq
  - show config
  - show ip prefix-list detail
  - show ip prefix-list summary
- Route Map Commands
  - continue
  - description
  - match as-path
  - match community
  - match interface
  - match ip address
  - match ip next-hop
  - match ip route-source
  - match metric
  - match origin
  - match route-type
  - match tag
  - route-map
  - set as-path
  - set automatic-tag
  - set comm-list delete
  - set community
  - set level
  - set local-preference
  - set metric
  - set metric-type
  - set next-hop
  - set origin
  - set tag
  - set weight
  - show config
  - show route-map
- AS-Path Commands
  - ip as-path access-list
  - show ip as-path-access-lists
- IP Community List Commands
  - ip community-list
  - show ip community-lists
- deny (for Standard IP ACLs)
- deny (for Extended IP ACLs)
- seq (for Standard IPv4 ACLs)
- deny tcp (for Extended IP ACLs)
- deny udp (for Extended IP ACLs)
- deny arp (for Extended MAC ACLs)
- deny icmp (for Extended IP ACLs)
- deny ether-type (for Extended MAC ACLs)
- deny (for Standard MAC ACLs)
- deny (for Extended MAC ACLs)
- permit (for Standard IP ACLs)
- permit arp (for Extended MAC ACLs)
- permit ether-type (for Extended MAC ACLs)
- permit icmp (for Extended IP ACLs)
- permit udp (for Extended IP ACLs)
- permit (for Extended IP ACLs)
- permit (for Standard MAC ACLs)
- seq (for Standard MAC ACLs)
- permit tcp (for Extended IP ACLs)
- seq arp (for Extended MAC ACLs)
- seq ether-type (for Extended MAC ACLs)
- seq (for IP ACLs)
- seq (for IPv6 ACLs)
- permit udp (for IPv6 ACLs)
- permit tcp (for IPv6 ACLs)
- permit icmp (for IPv6 ACLs)
- permit (for IPv6 ACLs)
- deny udp (for IPv6 ACLs)
- deny tcp (for IPv6 ACLs)
- deny icmp (for Extended IPv6 ACLs)
- deny (for IPv6 ACLs)
Access Control List (ACL) VLAN Groups and Content Addressable Memory (CAM)
- member vlan
- ip access-group
- show acl-vlan-group
- show cam-acl-vlan
- cam-acl-vlan
- show cam-usage
- show running config acl-vlan-group
- acl-vlan-group
- show acl-vlan-group detail
- description (ACL VLAN Group)
Bidirectional Forwarding Detection (BFD)
- bfd all-neighbors
- bfd disable
- bfd enable (Configuration)
- bfd enable (Interface)
- bfd interval
- bfd neighbor
- bfd protocol-liveness
- ip route bfd
- ip ospf bfd all-neighbors
- ipv6 ospf bfd all-neighbors
- isis bfd all-neighbors
- neighbor bfd
- neighbor bfd disable
- show bfd neighbors
- vrrp bfd neighbor
Border Gateway Protocol
- BGP IPv4 Commands
  - address-family
  - aggregate-address
  - bgp always-compare-med
  - bgp add-path
  - bgp asnotation
  - bgp bestpath as-path ignore
  - bgp bestpath as-path multipath-relax
  - bgp bestpath med confed
  - bgp bestpath med missing-as-best
  - bgp bestpath router-id ignore
  - bgp client-to-client reflection
  - bgp cluster-id
  - bgp confederation identifier
  - bgp confederation peers
  - bgp dampening
  - bgp default local-preference
  - bgp dmzlink-bw
  - bgp enforce-first-as
  - bgp fast-external-fallover
  - bgp four-octet-as-support
  - bgp graceful-restart
  - bgp non-deterministic-med
  - bgp recursive-bgp-next-hop
  - bgp regex-eval-optz-disable
  - bgp router-id
  - clear ip bgp
  - clear ip bgp dampening
  - clear ip bgp flap-statistics
  - clear ip bgp peer-group
  - debug ip bgp
  - debug ip bgp dampening
  - debug ip bgp events
  - debug ip bgp keepalives
  - debug ip bgp notifications
  - debug ip bgp soft-reconfiguration
  - debug ip bgp updates
  - default-metric
  - description
  - deny bandwidth
  - maximum-paths
  - neighbor activate
  - neighbor add-path
  - neighbor advertisement-interval
  - neighbor advertisement-start
  - neighbor allowas-in
  - neighbor default-originate
  - neighbor description
  - neighbor distribute-list
  - neighbor ebgp-multihop
  - neighbor fall-over
  - neighbor local-as
  - neighbor maximum-prefix
  - neighbor next-hop-self
  - neighbor password
  - neighbor peer-group (assigning peers)
  - neighbor peer-group (creating group)
  - neighbor peer-group passive
  - neighbor remote-as
  - neighbor remove-private-as
  - neighbor route-map
  - neighbor route-reflector-client
  - neighbor send-community
  - neighbor shutdown
  - neighbor soft-reconfiguration inbound
  - neighbor timers
  - neighbor update-source
  - neighbor weight
  - network
  - network backdoor
  - permit bandwidth
  - redistribute
  - redistribute ospf
  - router bgp
  - shutdown all
  - shutdown address-family-ipv4–multicast
  - shutdown address-family-ipv4–unicast
  - shutdown address-family-ipv6–unicast
  - set extcommunity bandwidth
  - show capture bgp-pdu neighbor
  - show config
  - show ip bgp
  - show ip bgp cluster-list
  - show ip bgp community
  - show ip bgp community-list
  - show ip bgp dampened-paths
  - show ip bgp dampened-paths
  - show ip bgp detail
  - show ip bgp extcommunity-list
  - show ip bgp filter-list
  - show ip bgp flap-statistics
  - show ip bgp inconsistent-as
  - show ip bgp neighbors
  - show ip bgp next-hop
  - show ip bgp paths
  - show ip bgp paths community
  - show ip bgp peer-group
  - show ip bgp regexp
  - show ip bgp summary
  - show running-config bgp
  - timers bgp
- MBGP Commands
  - debug ip bgp dampening
  - distance bgp
  - show ip bgp dampened-paths
- BGP Extended Communities (RFC 4360)
  - set extcommunity rt
  - set extcommunity soo
  - show ip bgp ipv4 extcommunity-list
  - show ip bgp paths extcommunity
  - show ip extcommunity-list
- IPv6 BGP Commands
  - clear ip bgp ipv6 unicast soft
  - debug ip bgp ipv6 unicast soft-reconfiguration
  - ipv6 prefix-list
  - neighbor soft-reconfiguration inbound
- IPv6 MBGP Commands
  - show ipv6 mbgproutes
Content Addressable Memory (CAM)
- CAM Profile Commands
  - cam-acl (Configuration)
  - cam-acl-egress
  - cam-optimization
  - cam-threshold
  - show cam-acl
  - show cam-usage
  - test cam-usage
Control Plane Policing (CoPP)
- control-plane-cpuqos
- ip unknown-unicast
- ipv6 unknown-unicast
- service-policy rate-limit-cpu-queues
- service-policy rate-limit-protocols
- show cpu-queue rate cp
- show ip protocol-queue-mapping
- show ipv6 protocol-queue-mapping
- show mac protocol-queue-mapping
Data Center Bridging (DCB)
- DCB Command
  - dcb-enable
- PFC Commands
  - clear pfc counters
  - description
  - pfc mode on
  - pfc no-drop queues
  - show dcb
  - show interface pfc
  - show interface pfc statistics
  - show stack-unit stack-ports pfc details
- ETS Commands
  - bandwidth-percentage
  - clear ets counters
  - dcb-enable
  - description
  - priority-list
  - priority-group
  - qos-policy-output ets
  - set-pgid
  - scheduler
  - show interface ets
  - show qos priority-groups
  - show stack-unit stack-ports ets details
- DCBX Commands
  - advertise dcbx-app-tlv
  - advertise dcbx-appln-tlv
  - advertise dcbx-tlv
  - dcbx port-role
  - dcbx version
  - debug dcbx
  - fcoe priority-bits
  - iscsi priority-bits
  - show interface dcbx detail
- dcb-map
- priority-pgid
- pfc mode on
- priority-group bandwidth pfc
- dcb-map stack-unit all stack-ports all
- show qos dcb-map
- dcb pfc-shared-buffer-size
- dcb-buffer-threshold
- priority
- qos-policy-buffer
- dcb-policy buffer-threshold (Interface Configuration)
- dcb-policy buffer-threshold (Global Configuration)
- show qos dcb-buffer-threshold
- dcb pfc-total-buffer-size
- show running-config dcb-buffer-threshold
- service-class buffer shared-threshold-weight
- dcb pfc-queues
- dcb {ets | pfc} enable
Debugging and Diagnostics
- Diagnostics and Monitoring Commands
  - logging coredump stack-unit
- Offline Diagnostic Commands
  - diag stack-unit
  - offline stack-unit
  - online stack-unit
- Hardware Commands
  - clear hardware stack-unit
  - clear hardware system-flow
  - clear hardware vlan-counters
  - hardware watchdog
  - show hardware mac
  - show hardware ip
  - show hardware stack-unit
  - show hardware buffer interface
  - show hardware buffer-stats-snapshot
  - show hardware counters interface
  - show hardware drops
  - show hardware stack-unit buffer-stats-snapshot (Total Buffer Information)
  - show hardware system-flow
  - show hardware vlan-counters
Dynamic Host Configuration Protocol (DHCP)
- Commands to Configure the System to be a DHCP Server
  - clear ip dhcp
  - debug ip dhcp server
  - debug ipv6 dhcp
  - default-router
  - disable
  - dns-server
(More items omitted...)

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Dell Command Line Reference Guide for the S4820T System 9.14.1.5

May 2019 Rev. A00

Page Summary Contents For Dell Command Line Reference Guide for the S4820T System 9.14.1.5The English title is: "Dell Command Line Reference Guide for the S4820T System, Version 9.14.1.5"

Page 1 Dell Command Line Reference Guide for the S4820T System 9.14.1.5 May 2019 Rev. A00

Page 2 Notes, cautions, and warnings NOTE: A NOTE indicates important information that helps you make better use of your product. CAUTION: A CAUTION indicates either potential damage to hardware or loss of d...

Page 3 Contents Chapter 1: About this Guide.........................................................................................................40 Objectives.................................................

Page 4 verified boot....................................................................................................................................................................... verified boot hash....

Page 5 show login statistics........................................................................................................................................................134 show memory...............

Page 6 access-class................................................................................................................................................................ clear counters ip access-gr...

Page 7 description.................................................................................................................................................................. match as-path................

Page 8 permit tcp (for Extended IP ACLs)............................................................................................................................ seq arp (for Extended MAC ACLs)..............

Page 9 bgp asnotation........................................................................................................................................................... bgp bestpath as-path ignore......

Page 10 neighbor peer-group (assigning peers)............................................................................................................... neighbor peer-group (creating group)..................

Page 11 BGP Extended Communities (RFC 4360).................................................................................................................447 set extcommunity rt................................

Page 12 clear ets counters..................................................................................................................................................... dcb-enable.........................

Page 13 clear hardware vlan-counters................................................................................................................................ hardware watchdog.............................

Page 14 ipv6 dhcp snooping database renew.................................................................................................................... ip dhcp snooping trust...............................

Page 15 fip-snooping port-mode fcoe-trusted........................................................................................................................608 show fip-snooping config....................

Page 16 Chapter 22: Internet Group Management Protocol (IGMP)........................................................653 IGMP Commands.............................................................................

Page 17 negotiation auto.........................................................................................................................................................700 keepalive.....................

Page 18 UDP Broadcast Commands.......................................................................................................................................... debug ip udp-helper.......................

Page 19 ip tcp initial-time..............................................................................................................................................................807 show ip tcp initial...

Page 20 ipv6 unicast-routing....................................................................................................................................................... show ipv6 cam stack-unit.......

Page 21 graceful-restart t3..........................................................................................................................................................905 hello padding.............

Page 22 show lacp.......................................................................................................................................................................... Chapter 31: Layer 2....

Page 23 clear lldp counters.....................................................................................................................................................994 clear lldp neighbors...........

Page 24 debug spanning-tree mstp.......................................................................................................................................... disable.................................

Page 25 show config...............................................................................................................................................................1078 show ipv6 nd ra–guard pol...

Page 26 ip ospf auth-change-wait-time.............................................................................................................................. ip ospf authentication-key.....................

Page 27 debug ipv6 ospf packet........................................................................................................................................... debug ipv6 ospf spf......................

Page 28 ip pim rp-address..................................................................................................................................................... ip pim rp-candidate.................

Page 29 Chapter 45: Quality of Service (Qo S)....................................................................................... Global Configuration Commands.................................................

Page 30 DSCP Color Map Commands......................................................................................................................................1324 dscp.....................................

Page 31 show rmon statistics.....................................................................................................................................................1370 Chapter 48: Rapid Spanning...

Page 32 timeout login response............................................................................................................................................ username................................

Page 33 show dot1x interface.............................................................................................................................................. SSH and SCP Commands....................

Page 34 protocol-tunnel destination-mac............................................................................................................................... protocol-tunnel enable......................

Page 35 logging console.........................................................................................................................................................1537 logging facility..............

Page 36 max-age........................................................................................................................................................................... protocol spanning-tre...

Page 37 ntp disable....................................................................................................................................................................... ntp multicast client....

Page 38 vlan-stack access.......................................................................................................................................................... vlan-stack compatible..........

Page 39 ipv6 route-import.......................................................................................................................................................... match source-protocol..........

Page 40 About this Guide This guide provides information about the Dell EMC Networking operating system (OS) command line interface (CLI). This book also includes information about the protocols and features ...

Manual Details

Brand	Dell
Pages	1,747
File Size	14.61 MB
Published	June 28, 2026

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Frequently Asked Questions

How do I access the Command Line Interface?

You can access the CLI through the boot-access password and the boot system command.

What is the feature command used for?

It is used to enable software features on devices using a command option.

How can I obtain help while using the CLI?

You can obtain help using the help command.

What command is used to list directory contents?

Use the dir command to list directory contents.

Dell Command Line Reference Guide for the S4820T System 9.14.1.5The English title is: "Dell Command Line Reference Guide for the S4820T System, Version 9.14.1.5"

Summary

feature vrf

show feature

remark

show config

access-class

clear counters ip access-group

ip access-group

ip control-plane egress-filter

show ip accounting access-list

deny

ip access-list standard