Virtualization Adapted Adapting Business Processes for Virtual Infrastrcuture (and vice-versa)


procedure to find port by ip arp mac

Filed under: Uncategorized — Tags: , , , , , , — iben @ 14:21

procedure to find port by ip arp mac

You have an IP address and want to find out what switch port it is on.
There is a core switch with edge switches and Cisco CDP is running.
Example: IP address is
– find the MAC address of this IP
open ssh console to core switch and run “sh arp”
coreswitch#sh arp | inc
Internet 0 0007.1234.cd43 ARPA Vlan5
– find port from MAC address
coreswitch#sh mac-address-table dynamic | inc 0007.1234.cd43
* 5 0007.1234.cd43 dynamic Yes 5 Gi7/12
– find edge switch for port
coreswitch#sh cdp nei gi7/12
Capability Codes: R – Router, T – Trans Bridge, B – Source Route Bridge
S – Switch, H – Host, I – IGMP, r – Repeater, P – Phone
Device ID Local Intrfce Holdtme Capability Platform Port ID
Gig 7/12 176 S I WS-C3560G-Gig 0/49
– open ssh console to edge switch and run “sh arp” repeat process


VMware ESX setting static mac addresses

Filed under: Uncategorized — Tags: , , , , — iben @ 15:22

1. Select a static MAC. NOTE: Static MAC addresses must be in the range of 00:50:56:00:00:00-00:50:56:3F:FF:FF to work with this procedure.
2. Remember to record the Static MAC addresses registered for future reference.
3. Unregister vm:
4. Note the datastore, vm inventory folder, and name for the vm in the summary tab
5. Power down the virtual machine
6. Right click the vm and select remove from inventory
7. Edit vmx:
8. Ssh to the esx host system (use putty)
9. cd /vmfs/volumes/
10. cd to the system’s folder
11. cp .vmx to .vmx.bak
12. vi .vmx
13. find the ethernet0 section
14. make the following changes:
15. change ethernet0.addressType = “vpx” to ethernet0.addressType = “static”
16. ethernet0.generatedAddress = “00:50:56:01.01.00” to ethernet0.address = “00:50:56:01.01.00”
17. rearrange so the following items are in this order and grouped together: ethernet0.address, ethernet0.addresstype, uuid.location, uuid.bios
18. Write the changes to the disk and exit
19. Reregister the vm:
20. In virtual center, browse to the host datastore (configuration, storage, double click on the vm’s datastore)
21. Browse to the edited .vmx file
22. Right click the .vmx file and select Add to Inventory
23. Enter the system name
24. Select the host
25. Select the resource pool
26. Click Finish
27. Power on the vm and verify the mac address
28. Windows: ipconfig /all find “Physical Address”
29. Linux: ifconfig /a grep Hwaddr


ethernet0.address = “00:50:56:88:6f:98”

ethernet0.addressType = “static”

uuid.location = “56 4d 6b b4 70 cc 85 24-59 1b 2d 24 0a 2b d7 7a”

uuid.bios = “50 08 5b 0d e1 f7 fb 8b-ba 39 74 1b 30 fc 0c 40”

Posted by Jae Ellers at Monday, January 28, 2008.

This post rocks! Helped me out of a tight bind today.

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