03-09-2007 08:12 PM - edited 03-11-2019 02:44 AM
Is it possible to change the mac address of the outside interface of a pix firewall (e.g PIX 506E) running 6.3(5)?
Background: My ISP bound the MAC address of my other firewall (SMC) when offering the DHCP lease. As a result, when I plug the PIX I am unable to get a proper DHCP lease.
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BigI# sh debug
debug dhcpc packet
debug dhcpc error
debug dhcpc detail
BigI#
BigI#
BigI#
BigI# 411001: Line protocol on Interface outside, changed state to up
DHCP: allocate request
DHCP: new entry. add to queue
DHCP: new ip lease str = 0xf3fcac
DHCP: SDiscover attempt # 1 for entry:
Temp IP addr: 0.0.0.0 for peer on Interface: outside
Temp sub net mask: 0.0.0.0
DHCP Lease server: 0.0.0.0, state: 1 Selecting
DHCP transaction id: 0x60A588
Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
Next timer fires after: 2 seconds
Retry count: 1 Client-ID: cisco-001a.a2a4.6172-outside
DHCP: SDiscover: sending 276 byte length DHCP packet
DHCP: SDiscover 276 bytes
DHCP Broadcast to 255.255.255.255 from 0.0.0.0....
DHCP: SDiscover attempt # 2 for entry:
Temp IP addr: 0.0.0.0 for peer on Interface: outside
Temp sub net mask: 0.0.0.0
DHCP Lease server: 0.0.0.0, state: 1 Selecting
DHCP transaction id: 0x60A588
Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
Next timer fires after: 2 seconds
Retry count: 2 Client-ID: cisco-001a.a2a4.6172-outside
DHCP: SDiscover: sending 276 byte length DHCP packet
DHCP: SDiscover 276 bytes
DHCP Broadcast to 255.255.255.255 from 0.0.0.0
DHCP: SDiscover attempt # 3 for entry:
-------------------------------------
TIA.
Jason.
03-09-2007 08:46 PM
Unfortunately we cant assign a different MAC address to interfaces in 6.x code. This is possible though from 7.2, 7.x code is not supported for PIX-506E. Our best bet here would be to get in touch with ISP and get the MAC address changed in their records.
Regards,
Vibhor.
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