Cisco 4506, IP Address of Device

[chanman525]

Hey all. I'm working on a wire labeling project and was wondering if there was a good way to capture what IP Address, and MAC address was plugged into a device. I know "show mac address-table" will pull in the MAC Address, but I'm looking for something now that will pull in the IP Address.

If I can get this information, I can gather up the data and sort it so I can figure out what device is plugged into which port, and it will make it a lot easier than tracing every cable to its location, which could take forever.
Thanks for any help.

 

[NetRx]

Is the 4506 the default gateway for the computers? If so, you can input 'show IP arp' and that will provide everything you need. Of course if you have smaller switches trunked into the 4506 then you will need to 'show mac' to narrow it down further.

If the VLANs are defined on another device (as in with the 'interface VLAN' command) then you can run 'show IP arp' on that device, but you will need to combine that with 'show mac' on the 4506 to find the specific ports.

 

[chanman525]

Thanks for your response. I knew about the show arp command, but I did not know about the show ip arp command. I did run the show ip arp command on our gateway and it returned the IP and MAC, so thank you for that.

I do have a question regarding this command though. Are the MAC Addresses listed in the results of this command the MAC addresses of the port, or the devices that are plugged into the port. The only reason I ask is, when I run a "show interface status" on the primary switch, the MAC's don't match up with the "show IP arp" command run from the gateway. Could you help me out a little more?

 

[NetRx]

The MAC addresses listed from 'show IP arp' are, for the most part, the end-nodes or computers. If you'd like, you can do verification through an ipconfig /all or ifconfig through a Unix variant.

The only reason I ask is, when I run a "show interface status" on the primary switch, the MAC's don't match up with the "show IP arp" command run from the gateway.

I don't quite follow you here. 'show int status' will not list MAC address information. 'show interface' will but the MAC address listed there is not the one that will appear in 'show ip arp'. However, there is an exception with the VLAN interface.

If you are getting a lot of duplicate MAC addresses associated with different IP addresses from various VLANs, try this

show int vlan <#>
Vlan<#> is up, line protocol is up 
  Hardware is EtherSVI, address is 00ab.cdef.1234 (00ab.cdef.1234)

show ip arp | excl 00ab.cdef.1234

That will trim your results a bit if you have a lot of VLANs defined on the core.

I might be getting off on a tangent though. I can tell you that 'show IP arp' will at least give you the MAC addresses from the NICs on the computers.

 

[eiregobragh]

Guys,
I changed the config-register to 2102 and now it all works ok as you can see below;

Switch2#sh run
Building configuration...

Current configuration : 1226 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname Switch2
!
boot-start-marker
boot system flash bootflash:cat4500e-entservicesk9-mz.122-53.SG1.bin
boot system flash bootflash:cat4500e-ipbase-mz.122-52.SG.bin
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
ip vrf mgmtVrf
!
vtp domain ''
vtp mode transparent
!
!
!
power redundancy-mode redundant
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
redundancy
mode sso
!
vlan internal allocation policy ascending
!
!
!
interface FastEthernet1
ip vrf forwarding mgmtVrf
no ip address
speed auto
duplex auto
!
interface TenGigabitEthernet3/1
!
interface TenGigabitEthernet3/2
!
interface GigabitEthernet3/3
!
interface GigabitEthernet3/4
!
interface GigabitEthernet3/5
!
interface GigabitEthernet3/6
!
interface TenGigabitEthernet4/1
!
interface TenGigabitEthernet4/2
!
interface GigabitEthernet4/3
!
interface GigabitEthernet4/4
!
interface GigabitEthernet4/5
!
interface GigabitEthernet4/6
!
interface Vlan1
no ip address
!
ip http server
no ip http secure-server
!
!
!
!
!
!
line con 0
stopbits 1
line vty 0 4
login
!
end

Switch2#
Switch2#
Switch2#
Switch2#dir bootf
Switch2#dir bootflash:
Directory of bootflash:/

6 -rw- 23449877 Jun 2 2010 08:04:20 +00:00 cat4500e-ipbase-mz.122-52.SG.bin
7 -rw- 25442405 Jun 21 2010 04:00:28 +00:00 cat4500e-entservicesk9-mz.122-53.SG1.bin

131436544 bytes total (75100160 bytes free)
Switch2#
Switch2#
Switch2#
Switch2#sh ver
Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-ENTSERVICESK9-M), Version 12.2(53)SG1, RELEASE SOFTWARE (fc1)
Technical Support:

http://www.cisco.com/techsupport

Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Fri 30-Oct-09 18:26 by prod_rel_team
Image text-base: 0x10000000, data-base: 0x1279617C

ROM: 12.2(44r)SG5
Darkside Revision 4, Jawa Revision 18, Tatooine Revision 140, Forerunner Revision 1.74

Switch2 uptime is 2 minutes
Uptime for this control processor is 2 minutes
System returned to ROM by power-on
System image file is "bootflash:cat4500e-entservicesk9-mz.122-53.SG1.bin"


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

cisco WS-C4507R-E (MPC8548) processor (revision 6) with 524288K bytes of memory.
Processor board ID FOX1419GBCH
MPC8548 CPU at 1.33GHz, Supervisor 6-E
Last reset from PowerUp
1 Virtual Ethernet interface
8 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces
511K bytes of non-volatile configuration memory.

Configuration register is 0x2102




Paul Kilcoyne B. Eng.
Innealtóir/ Engineer

http://www.pknetworks.ie

 

[burtsbees]

Ha ha, wrong post homeslice...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[brianinms]

Chanman,

Google sl360 and use the switch mapper feature to map out the ports.