How can I match conditions when I show arp?

up vote
2
down vote

favorite

In my Cisco Router I check the arp:

Router>show arp 

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.1.1             -   0001.42D2.AE01  ARPA   GigabitEthernet0/0/0

Internet  192.168.1.2             67  000C.CF4C.99E6  ARPA   GigabitEthernet0/0/0

Internet  192.168.2.1             -   0001.42D2.AE02  ARPA   GigabitEthernet0/0/1

Internet  192.168.2.2             109 0010.114E.A4EC  ARPA   GigabitEthernet0/0/1

I want to match conditions, but I tried bellow, all do not work:

Router>show arp | match 192.168.2.2

                ^

% Invalid input detected at '^' marker.



Router>show arp 192.168.2.2

                ^

% Invalid input detected at '^' marker.

I also tried the begin, or include:

Router#show arp | begin ?

% Unrecognized command

UPDATE

The show version display this:

Cisco IOS XE Software, Version 03.16.05.S - Extended Support Release

Cisco IOS Software, ISR Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version Version 15.5 (3)S5, RELEASE SOFTWARE (fc2)

this is a ISR 4321 Router.

edited Nov 15 at 12:39

Cown

5,2153930

asked Nov 15 at 12:00

three-blocks

1926

migrated from serverfault.com Nov 15 at 12:08

This question came from our site for system and network administrators.

You need to be in config mode, then sh arp | in 192.168.2.2
– Cown
Nov 15 at 12:12

@Cown hi are you certain about that? gw(config)#sh arp ? => % Unrecognized command, tested on IOS 15.2(4)M3 just now.
– jonathanjo
Nov 15 at 12:19

Sorry not config mode, enable mode.
– Cown
Nov 15 at 12:20

2

command | match somehing is used in Juniper. In Cisco it's command | i something
– Andrey Prokhorov
Nov 15 at 12:23

1

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2
– Cown
Nov 15 at 12:40

|
show 8 more comments

up vote
2
down vote

favorite

In my Cisco Router I check the arp:

Router>show arp 

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.1.1             -   0001.42D2.AE01  ARPA   GigabitEthernet0/0/0

Internet  192.168.1.2             67  000C.CF4C.99E6  ARPA   GigabitEthernet0/0/0

Internet  192.168.2.1             -   0001.42D2.AE02  ARPA   GigabitEthernet0/0/1

Internet  192.168.2.2             109 0010.114E.A4EC  ARPA   GigabitEthernet0/0/1

I want to match conditions, but I tried bellow, all do not work:

Router>show arp | match 192.168.2.2

                ^

% Invalid input detected at '^' marker.



Router>show arp 192.168.2.2

                ^

% Invalid input detected at '^' marker.

I also tried the begin, or include:

Router#show arp | begin ?

% Unrecognized command

UPDATE

The show version display this:

Cisco IOS XE Software, Version 03.16.05.S - Extended Support Release

Cisco IOS Software, ISR Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version Version 15.5 (3)S5, RELEASE SOFTWARE (fc2)

this is a ISR 4321 Router.

edited Nov 15 at 12:39

Cown

5,2153930

asked Nov 15 at 12:00

three-blocks

1926

migrated from serverfault.com Nov 15 at 12:08

This question came from our site for system and network administrators.

You need to be in config mode, then sh arp | in 192.168.2.2
– Cown
Nov 15 at 12:12

@Cown hi are you certain about that? gw(config)#sh arp ? => % Unrecognized command, tested on IOS 15.2(4)M3 just now.
– jonathanjo
Nov 15 at 12:19

Sorry not config mode, enable mode.
– Cown
Nov 15 at 12:20

2

command | match somehing is used in Juniper. In Cisco it's command | i something
– Andrey Prokhorov
Nov 15 at 12:23

1

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2
– Cown
Nov 15 at 12:40

|
show 8 more comments

up vote
2
down vote

favorite

In my Cisco Router I check the arp:

Router>show arp 

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.1.1             -   0001.42D2.AE01  ARPA   GigabitEthernet0/0/0

Internet  192.168.1.2             67  000C.CF4C.99E6  ARPA   GigabitEthernet0/0/0

Internet  192.168.2.1             -   0001.42D2.AE02  ARPA   GigabitEthernet0/0/1

Internet  192.168.2.2             109 0010.114E.A4EC  ARPA   GigabitEthernet0/0/1

I want to match conditions, but I tried bellow, all do not work:

Router>show arp | match 192.168.2.2

                ^

% Invalid input detected at '^' marker.



Router>show arp 192.168.2.2

                ^

% Invalid input detected at '^' marker.

I also tried the begin, or include:

Router#show arp | begin ?

% Unrecognized command

UPDATE

The show version display this:

Cisco IOS XE Software, Version 03.16.05.S - Extended Support Release

Cisco IOS Software, ISR Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version Version 15.5 (3)S5, RELEASE SOFTWARE (fc2)

this is a ISR 4321 Router.

edited Nov 15 at 12:39

Cown

5,2153930

asked Nov 15 at 12:00

three-blocks

1926

In my Cisco Router I check the arp:

Router>show arp 

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.1.1             -   0001.42D2.AE01  ARPA   GigabitEthernet0/0/0

Internet  192.168.1.2             67  000C.CF4C.99E6  ARPA   GigabitEthernet0/0/0

Internet  192.168.2.1             -   0001.42D2.AE02  ARPA   GigabitEthernet0/0/1

Internet  192.168.2.2             109 0010.114E.A4EC  ARPA   GigabitEthernet0/0/1

I want to match conditions, but I tried bellow, all do not work:

Router>show arp | match 192.168.2.2

                ^

% Invalid input detected at '^' marker.



Router>show arp 192.168.2.2

                ^

% Invalid input detected at '^' marker.

I also tried the begin, or include:

Router#show arp | begin ?

% Unrecognized command

UPDATE

The show version display this:

Cisco IOS XE Software, Version 03.16.05.S - Extended Support Release

Cisco IOS Software, ISR Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version Version 15.5 (3)S5, RELEASE SOFTWARE (fc2)

this is a ISR 4321 Router.

cisco arp

edited Nov 15 at 12:39

Cown

5,2153930

asked Nov 15 at 12:00

three-blocks

1926

edited Nov 15 at 12:39

Cown

5,2153930

asked Nov 15 at 12:00

three-blocks

1926

edited Nov 15 at 12:39

Cown

5,2153930

edited Nov 15 at 12:39

Cown

5,2153930

edited Nov 15 at 12:39

Cown

5,2153930

asked Nov 15 at 12:00

three-blocks

1926

asked Nov 15 at 12:00

three-blocks

1926

asked Nov 15 at 12:00

three-blocks

1926

migrated from serverfault.com Nov 15 at 12:08

This question came from our site for system and network administrators.

migrated from serverfault.com Nov 15 at 12:08

This question came from our site for system and network administrators.

You need to be in config mode, then sh arp | in 192.168.2.2
– Cown
Nov 15 at 12:12

@Cown hi are you certain about that? gw(config)#sh arp ? => % Unrecognized command, tested on IOS 15.2(4)M3 just now.
– jonathanjo
Nov 15 at 12:19

Sorry not config mode, enable mode.
– Cown
Nov 15 at 12:20

2

command | match somehing is used in Juniper. In Cisco it's command | i something
– Andrey Prokhorov
Nov 15 at 12:23

1

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2
– Cown
Nov 15 at 12:40

|
show 8 more comments

You need to be in config mode, then sh arp | in 192.168.2.2
– Cown
Nov 15 at 12:12

@Cown hi are you certain about that? gw(config)#sh arp ? => % Unrecognized command, tested on IOS 15.2(4)M3 just now.
– jonathanjo
Nov 15 at 12:19

Sorry not config mode, enable mode.
– Cown
Nov 15 at 12:20

2

command | match somehing is used in Juniper. In Cisco it's command | i something
– Andrey Prokhorov
Nov 15 at 12:23

1

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2
– Cown
Nov 15 at 12:40

You need to be in config mode, then sh arp | in 192.168.2.2
– Cown
Nov 15 at 12:12

@Cown hi are you certain about that? gw(config)#sh arp ? => % Unrecognized command, tested on IOS 15.2(4)M3 just now.
– jonathanjo
Nov 15 at 12:19

Sorry not config mode, enable mode.
– Cown
Nov 15 at 12:20

command | match somehing is used in Juniper. In Cisco it's command | i something
– Andrey Prokhorov
Nov 15 at 12:23

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2
– Cown
Nov 15 at 12:40

|
show 8 more comments

1 Answer
1

active

oldest

votes

up vote
4
down vote

accepted

For most varieties of Cisco IOS. (For the ISR 4321 it appears the answer is different, see later.)

To start with matching, use | begin:

gw>show arp | begin 192.168.0.32

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

Internet  192.168.0.36            0   0004.2012.4321  ARPA   Vlan1

...

There are a few varieties:

gw>show arp | ?

  begin    Begin with the line that matches

  count    Count number of lines which match regexp

  exclude  Exclude lines that match

  format   Format the output using the specified spec file

  include  Include lines that match

  section  Filter a section of output

But there's something funny going on if you can't do the basic:

gw>show arp 192.168.0.32

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

What model and version are you using?

ISR-4321

Per Cown's comment:

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2

Packet tracer

As suggested by Cown in comments, if you're using Packet Tracer, not a real router, you have to be in enable mode.

edited Nov 15 at 12:44

answered Nov 15 at 12:16

jonathanjo

8,4181629

Yeah same output i get here, just a bit more options, since it's a 6500 series.
– Cown
Nov 15 at 12:21

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
4
down vote

accepted

For most varieties of Cisco IOS. (For the ISR 4321 it appears the answer is different, see later.)

To start with matching, use | begin:

gw>show arp | begin 192.168.0.32

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

Internet  192.168.0.36            0   0004.2012.4321  ARPA   Vlan1

...

There are a few varieties:

gw>show arp | ?

  begin    Begin with the line that matches

  count    Count number of lines which match regexp

  exclude  Exclude lines that match

  format   Format the output using the specified spec file

  include  Include lines that match

  section  Filter a section of output

But there's something funny going on if you can't do the basic:

gw>show arp 192.168.0.32

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

What model and version are you using?

ISR-4321

Per Cown's comment:

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2

Packet tracer

As suggested by Cown in comments, if you're using Packet Tracer, not a real router, you have to be in enable mode.

edited Nov 15 at 12:44

answered Nov 15 at 12:16

jonathanjo

8,4181629

Yeah same output i get here, just a bit more options, since it's a 6500 series.
– Cown
Nov 15 at 12:21

add a comment |

up vote
4
down vote

accepted

For most varieties of Cisco IOS. (For the ISR 4321 it appears the answer is different, see later.)

To start with matching, use | begin:

gw>show arp | begin 192.168.0.32

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

Internet  192.168.0.36            0   0004.2012.4321  ARPA   Vlan1

...

There are a few varieties:

gw>show arp | ?

  begin    Begin with the line that matches

  count    Count number of lines which match regexp

  exclude  Exclude lines that match

  format   Format the output using the specified spec file

  include  Include lines that match

  section  Filter a section of output

But there's something funny going on if you can't do the basic:

gw>show arp 192.168.0.32

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

What model and version are you using?

ISR-4321

Per Cown's comment:

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2

Packet tracer

As suggested by Cown in comments, if you're using Packet Tracer, not a real router, you have to be in enable mode.

edited Nov 15 at 12:44

answered Nov 15 at 12:16

jonathanjo

8,4181629

Yeah same output i get here, just a bit more options, since it's a 6500 series.
– Cown
Nov 15 at 12:21

add a comment |

up vote
4
down vote

accepted

For most varieties of Cisco IOS. (For the ISR 4321 it appears the answer is different, see later.)

To start with matching, use | begin:

gw>show arp | begin 192.168.0.32

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

Internet  192.168.0.36            0   0004.2012.4321  ARPA   Vlan1

...

There are a few varieties:

gw>show arp | ?

  begin    Begin with the line that matches

  count    Count number of lines which match regexp

  exclude  Exclude lines that match

  format   Format the output using the specified spec file

  include  Include lines that match

  section  Filter a section of output

But there's something funny going on if you can't do the basic:

gw>show arp 192.168.0.32

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

What model and version are you using?

ISR-4321

Per Cown's comment:

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2

Packet tracer

As suggested by Cown in comments, if you're using Packet Tracer, not a real router, you have to be in enable mode.

edited Nov 15 at 12:44

answered Nov 15 at 12:16

jonathanjo

8,4181629

For most varieties of Cisco IOS. (For the ISR 4321 it appears the answer is different, see later.)

To start with matching, use | begin:

gw>show arp | begin 192.168.0.32

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

Internet  192.168.0.36            0   0004.2012.4321  ARPA   Vlan1

...

There are a few varieties:

gw>show arp | ?

  begin    Begin with the line that matches

  count    Count number of lines which match regexp

  exclude  Exclude lines that match

  format   Format the output using the specified spec file

  include  Include lines that match

  section  Filter a section of output

But there's something funny going on if you can't do the basic:

gw>show arp 192.168.0.32

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.0.32            0   90fb.a630.1234  ARPA   Vlan1

What model and version are you using?

ISR-4321

Per Cown's comment:

Ok i found the error i think, you need to use show ip arp | in 192.168.2.2

Packet tracer

As suggested by Cown in comments, if you're using Packet Tracer, not a real router, you have to be in enable mode.

edited Nov 15 at 12:44

answered Nov 15 at 12:16

jonathanjo

8,4181629

edited Nov 15 at 12:44

answered Nov 15 at 12:16

jonathanjo

8,4181629

answered Nov 15 at 12:16

jonathanjo

8,4181629

answered Nov 15 at 12:16

jonathanjo

8,4181629

Yeah same output i get here, just a bit more options, since it's a 6500 series.
– Cown
Nov 15 at 12:21

add a comment |

Yeah same output i get here, just a bit more options, since it's a 6500 series.
– Cown
Nov 15 at 12:21

Yeah same output i get here, just a bit more options, since it's a 6500 series.
– Cown
Nov 15 at 12:21

add a comment |

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