ARP/ND Operational Commands

Show Commands

Neighbor Show Commands

Syntax:

show neighbor <option>

Option Description

Option	Description
`-`	Without any option, the commands display the information for all neighbors.
`instance <instance_name>`	Displays summary of the specified neighbor instance
`IPv4`	Displays neighbor summary for the specified IPv4 address.
`IPv6`	Displays neighbor summary for the specified IPv6 address.
`request <…>`	Displays information about GARP requests made.
`neighbor timer`	Displays the configured ARP/ND neighbor timer intervals. It provides information about key timers, including GARP, Neighbor Probe, Neighbor Scan, ARP Throttle, and RA intervals and makes configuration verification and troubleshooting easier.

-

Without any option, the commands display the information for all neighbors.

instance <instance_name>

Displays summary of the specified neighbor instance

IPv4

Displays neighbor summary for the specified IPv4 address.

IPv6

Displays neighbor summary for the specified IPv6 address.

request <…>

Displays information about GARP requests made.

neighbor timer

Displays the configured ARP/ND neighbor timer intervals. It provides information about key timers, including GARP, Neighbor Probe, Neighbor Scan, ARP Throttle, and RA intervals and makes configuration verification and troubleshooting easier.

Example: Summary of neighbor

supervisor@rtbrick: op> show neighbor
Instance                MAC Address          Interface             IP Address                                  Dynamic  Entry Time
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        192.0.2.5                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        192.0.2.9                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        192.0.2.13                                  true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        fe80::e8c5:7a00:648f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        fe80::e8c5:7a00:c88f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        fe80::e8c5:7a01:2c8f:565f                   true     Fri Jun 05 12:41:10

Example: Summary of neighbor instance

supervisor@rtbrick: op> show neighbor instance default
Instance                MAC Address          Interface             IP Address                                  Dynamic  Entry Time
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        192.0.2.5                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        192.0.2.9                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        192.0.2.13                                  true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        fe80::e8c5:7a00:648f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        fe80::e8c5:7a00:c88f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        fe80::e8c5:7a01:2c8f:565f                   true     Fri Jun 05 12:41:10

Example: Summary of the neighbor for the specified address family

supervisor@rtbrick: op> show neighbor ipv4
Instance                MAC Address          Interface             IP Address                                  Dynamic  Entry Time
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        192.0.2.5                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        192.0.2.9                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        192.0.2.13                                  true     Fri Jun 05 12:42:09

supervisor@rtbrick: op> show neighbor ipv6
Instance                MAC Address          Interface             IP Address                                  Dynamic  Entry Time
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        fe80::e8c5:7a00:648f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        fe80::e8c5:7a00:c88f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        fe80::e8c5:7a01:2c8f:565f                   true     Fri Jun 05 12:41:10

Example: Summary of the static IP neighbor

supervisor@rtbrick: op> show neighbor
Instance                MAC Address          Interface             IP Address                                  Dynamic  Entry Time
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        192.0.2.5                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        192.0.2.9                                   true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        192.0.2.13                                  true     Fri Jun 05 12:42:09
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        fe80::e8c5:7a00:648f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        fe80::e8c5:7a00:c88f:565f                   true     Fri Jun 05 12:41:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        fe80::e8c5:7a01:2c8f:565f                   true     Fri Jun 05 12:41:10

The following example displays the configured timer intervals for GARP, neighbor probing and scanning, ARP throttling, and Router Advertisement operations.

supervisor@rtbrick.net: cfg> show neighbor timer
Timer                   Interval
GARP interval                 60
Neighbor probe interval       10
Neighbor scan interval        60
ARP throttle interval         10
RA interval                   10

Neighbor Request

This command is used to display detailed information about various ARP neighbor requests.

Syntax:

show neighbor request <option>

Option Description

Option	Description
`-`	Without any option, the commands display the information about all ARP requests made.
`type`	This option allows you to specify the type of neighbor request.
`arp-proxy`	Displays information about ARP proxy requests.
`arp-reply`	Shows ARP reply messages.
`arp-request`	Displays ARP request messages.
`arp-static`	Shows static ARP entries.
`garp`	Displays Gratuitous ARP (GARP) messages.

-

Without any option, the commands display the information about all ARP requests made.

type

This option allows you to specify the type of neighbor request.

arp-proxy

Displays information about ARP proxy requests.

arp-reply

Shows ARP reply messages.

arp-request

Displays ARP request messages.

arp-static

Shows static ARP entries.

garp

Displays Gratuitous ARP (GARP) messages.

Example: Summary of the request

supervisor@rtbrick: op> show neighbor request
Interface            IP Address                                  Type              Entry Time
ifl-0/1/22/0         192.0.2.2                                   garp              Fri Jun 05 12:41:06
ifl-0/1/22/100       192.0.2.6                                   garp              Fri Jun 05 12:41:06
ifl-0/1/22/200       192.0.2.10                                  garp              Fri Jun 05 12:41:06
ifl-0/1/22/300       192.0.2.14                                  garp              Fri Jun 05 12:41:06
ifl-0/1/22/0         fe80::5c07:58ff:fe79:a17                    garp              Fri Jun 05 12:41:06
ifl-0/1/22/100       fe80::5c07:5800:6479:a17                    garp              Fri Jun 05 12:41:06
ifl-0/1/22/200       fe80::5c07:5800:c879:a17                    garp              Fri Jun 05 12:41:06
ifl-0/1/22/300       fe80::5c07:5801:2c79:a17                    garp              Fri Jun 05 12:41:06

Example: Summary of the request type GARP

supervisor@rtbrick: op> show neighbor request type garp
Interface            IP Address                                  Type              Entry Time
ifl-0/1/22/0         192.0.2.2                                   garp              Fri Jun 05 12:41:06
ifl-0/1/22/100       192.0.2.6                                   garp              Fri Jun 05 12:41:06
ifl-0/1/22/200       192.0.2.10                                  garp              Fri Jun 05 12:41:06
ifl-0/1/22/300       192.0.2.14                                  garp              Fri Jun 05 12:41:06
ifl-0/1/22/0         fe80::5c07:58ff:fe79:a17                    garp              Fri Jun 05 12:41:06
ifl-0/1/22/100       fe80::5c07:5800:6479:a17                    garp              Fri Jun 05 12:41:06
ifl-0/1/22/200       fe80::5c07:5800:c879:a17                    garp              Fri Jun 05 12:41:06
ifl-0/1/22/300       fe80::5c07:5801:2c79:a17                    garp              Fri Jun 05 12:41:06

Neighbor History

This command is used to display information for deleted or disconnected neighbors. It allows you to retrieve information for the latest 1,000 deleted neighbor entries.

Syntax:

show neighbor history <option>

Option Description

Option	Description
`-`	Without any option, the command displays the history of all neighbors.
`instance`	Displays the neighbor’s history for the specified instance.
`interface`	Displays history of a specified interface.
`ipv4`	Displays history of a specified IPv4 neighbor.
`ipv6`	Displays history of a specified IPv6 neighbor.

-

Without any option, the command displays the history of all neighbors.

instance

Displays the neighbor’s history for the specified instance.

interface

Displays history of a specified interface.

ipv4

Displays history of a specified IPv4 neighbor.

ipv6

Displays history of a specified IPv6 neighbor.

Example: Neighbor history

supervisor@rtbrick: op> show neighbor history
Instance                MAC Address          Interface             IP Address                                  Dynamic  Create Time          Delete Time
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:39:53  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:38:54  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        192.0.2.5                                   true     Fri Jun 05 12:39:53  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        fe80::e8c5:7a00:648f:565f                   true     Fri Jun 05 12:38:54  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        192.0.2.9                                   true     Fri Jun 05 12:39:53  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        fe80::e8c5:7a00:c88f:565f                   true     Fri Jun 05 12:38:54  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        192.0.2.13                                  true     Fri Jun 05 12:39:53  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        fe80::e8c5:7a01:2c8f:565f                   true     Fri Jun 05 12:38:54  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:40:41  Fri Jun 05 12:40:49
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:40:32  Fri Jun 05 12:40:49
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        fe80::e8c5:7a00:648f:565f                   true     Fri Jun 05 12:40:32  Fri Jun 05 12:40:49
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        fe80::e8c5:7a00:c88f:565f                   true     Fri Jun 05 12:40:32  Fri Jun 05 12:40:49
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/300        fe80::e8c5:7a01:2c8f:565f                   true     Fri Jun 05 12:40:32  Fri Jun 05 12:40:49
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:42:09  Fri Jun 05 12:42:17
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:41:10  Fri Jun 05 12:42:17
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        192.0.2.5                                   true     Fri Jun 05 12:42:09  Fri Jun 05 12:42:18
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/100        fe80::e8c5:7a00:648f:565f                   true     Fri Jun 05 12:41:10  Fri Jun 05 12:42:18
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        192.0.2.9                                   true     Fri Jun 05 12:42:09  Fri Jun 05 12:42:18
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/200        fe80::e8c5:7a00:c88f:565f                   true     Fri Jun 05 12:41:10  Fri Jun 05 12:42:18

Example: History of a specified nieghbor interface

supervisor@rtbrick: op> show neighbor history interface ifl-0/1/22/0
Instance                MAC Address          Interface             IP Address                                  Dynamic  Create Time          Delete Time
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:39:53  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:38:54  Fri Jun 05 12:40:10
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:40:41  Fri Jun 05 12:40:49
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:40:32  Fri Jun 05 12:40:49
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          192.0.2.1                                   true     Fri Jun 05 12:42:09  Fri Jun 05 12:42:17
default                 e8:c5:7a:8f:56:5f    ifl-0/1/22/0          fe80::e8c5:7aff:fe8f:565f                   true     Fri Jun 05 12:41:10  Fri Jun 05 12:42:17