Dell Command Line Reference Guide for the S4048–ON System 9.14.2.4

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show arp

Display the ARP table.

Syntax
show arp [vrf vrf-name] [interface interface | ip ip-address [mask] | macaddress mac-address [mac-address mask]] [retries] [static | dynamic] [inspection {database | statistics][summary]
Parameters
vrf vrf-name
(OPTIONAL) Enter the keyword vrf and then the name of the VRF.
NOTE: Use this attribute to start a BGP instance for either a specific address family corresponding to the default VRF or an IPv4 address family corresponding to a non-default VRF.
interface interface
(OPTIONAL) Enter the following keywords and the interface information:
  • For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port[/subport] information.
  • For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information.
  • For the Management interface on the stack-unit, enter the keyword ManagementEthernet then the slot/port information.
  • For a port channel interface, enter the keywords port-channel then a number.
  • For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
ip ip-address mask
(OPTIONAL) Enter the keyword ip then an IP address in the dotted decimal format. Enter the optional IP address mask in the slash prefix format (/ x).
inspection
Enter the keyword inspection with one of the following keywords to view ARP entries:
  • database — view a list of ARP entries learned using DAI
  • statistics — view DAI statistics
macaddress mac-address mask
(OPTIONAL) Enter the keyword macaddress then a MAC address in nn:nn:nn:nn:nn:nn format. Enter the optional MAC address mask in nn:nn:nn:nn:nn format also.
static
(OPTIONAL) Enter the keyword static to view entries entered manually.
retries
(OPTIONAL) Enter the keyword retries to show the number of ARP retries before a 20–second back off.
dynamic
(OPTIONAL) Enter the keyword dynamic to view dynamic entries.
summary
(OPTIONAL) Enter the keyword summary to view a summary of ARP entries.
Command Modes
EXEC Privilege
Command History

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version
Description
9.10(0.1)
Introduced on the S6010-ON and S4048T-ON.
9.10(0.0)
Introduced on the S3148.
9.10(0.0)
Introduced on the S6100–ON.
9.8(2.0)
Introduced on the S3100 series.
9.8(1.0)
Introduced on the Z9100–ON.
9.8(0.0P5)
Introduced on the S4048-ON.
9.8(0.0P2)
Introduced on the S3048-ON.
9.7(0.0)
Introduced on the S6000-ON.
9.4.(0.0)
Added support for VRF and added usage information for the clear arp-cache command.
9.2(1.0)
Introduced on the Z9500.
9.0.2.0
Introduced on the S6000.
8.3.19.0
Introduced on the S4820T.
8.3.11.1
Introduced on the Z9000.
8.5.1.0
Added support for 4-port 40G line cards on the E-Series.
8.3.7.0
Introduced on the S4810.
8.2.1.0
Added support for 4094 VLANs on the E-Series (the prior limit was 2094).
8.1.1.0
Introduced on the E-Series.
7.9.1.0
Introduced VRF on the E-Series.
7.8.1.0
Augmented to display local ARP entries learned from private VLANs (PVLANs).
7.6.1.0
Introduced on the S-Series.
7.5.1.0
Introduced on the C-Series.
pre-6.1.1.0
Introduced on the E-Series.
Usage Information
The following example shows two VLANs that are associated with a private VLAN (PVLAN) (refer to Private VLAN (PVLAN)).

If you have entered the clear arp-cache command to remove a large number of ARP entries and the command is still being processed in the background, an error message display if you attempt to enter the show arp command:

Clear arp in-progress. Please try after sometime!

The following describes the show arp command shown in the following example.

Description
Protocol
Displays the protocol type.
Address
Displays the IP address of the ARP entry.
Age(min)
Displays the age (in minutes) of the ARP entry.
Hardware Address
Displays the MAC address associated with the ARP entry.
Interface
Displays the first two letters of the interfaces type and the slot/port associated with the ARP entry.
VLAN
Displays the VLAN ID, if any, associated with the ARP entry.
CPU
Lists which CPU the entries are stored on.
Example
DellEMC> show arp
Protocol  Address  Age(min) Hardware Address Interface VLAN CPU
-------------------------------------------------------------
Internet  192.2.1.254 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.253 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.252 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.251 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.250 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.251 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.250 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.249 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.248 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.247 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.246 1  00:00:c0:02:01:02  Te 2/13  -    CP
Internet  192.2.1.245 1  00:00:c0:02:01:02  Te 2/13  -    CP
Example (Private VLAN)
NOTE: In this example, Line 1 shows community VLAN 200 (in primary VLAN 10) in a PVLAN. Line 2 shows primary VLAN 10.
DellEMC# show arp
Protocol Address  Age(min) Hardware Address  Interface VLAN  CPU
---------------------------------------------------------------
Internet 5.5.5.1       -  00:01:e8:43:96:5e  -      Vl 10 pv 200 CP
Internet 5.5.5.10      -  00:01:e8:44:99:55  -      Vl 10        CP
Internet 10.1.2.4      1  00:01:e8:d5:9e:e2  Ma 1/1 -            CP
Internet 10.10.10.4    1  00:01:e8:d5:9e:e2  Ma 1/1 -            CP
Internet 10.16.127.53  1  00:01:e8:d5:9e:e2  Ma 1/1 -            CP
Internet 10.16.134.254 20 00:01:e8:d5:9e:e2  Ma 1/1 -            CP
Internet 133.33.33.4   1  00:01:e8:d5:9e:e2  Ma 1/1 -            CP
Usage Information

The following describes the show arp summary command shown in the following example.

Description
Total Entries
Lists the total number of ARP entries in the ARP table.
Static Entries
Lists the total number of configured or static ARP entries.
Dynamic Entries
Lists the total number of learned or dynamic ARP entries.
CPU
Lists which CPU the entries are stored on.
Example (Summary)
DellEMC# show arp summary

TotalEntries Static Entries Dynamic Entries CPU
----------------------------------------------
83             0               83           CP
DellEMC#
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