Re: Mac Address is changing

not following 100%

but if you change a port from switchport to routed the mac will change:

Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#int g1/0/7
Switch(config-if)#switchport
Switch(config-if)#do sh int Gi1/0/7 | i address
  Hardware is Gigabit Ethernet, address is 001d.e544.dc07 (bia
001d.e544.dc07)
Switch(config-if)#no switchport
Switch(config-if)#do sh int Gi1/0/7 | i address
  Hardware is Gigabit Ethernet, address is 001d.e544.dc42 (bia
001d.e544.dc42)

 --
Garry L. Baker

"With sufficient thrust, pigs fly just fine..." - RFC 1925

On Mon, Aug 15, 2011 at 10:06 AM, <roykhan123_at_hotmail.com> wrote:

> Dear All.
>
> I am facing one issue. i have 2 switches connect together.
>
> SW1 F0/35 -------------------------- SW2 F1/0/1
> in switch sw1 one i have a vlan access list
>
> ***********************
> !
> mac access-list extended allow_all
> permit any any
> !
> mac access-list extended block_MAC
> permit host 001f.2791.dc83 any
> !
> vlan access-map block_MAC 100
> action drop
> match mac address block_MAC
> vlan access-map block_MAC 200
> action forward
> match mac address allow_all
> !
> vlan filter block_MAC vlan-list 100
> ******************************
> this vlan access is not working i am trying to block the mac address of SW2
> F1/0/1 but what i am seeing that SW2 mac address is changing in
> SW2.
> SW2:
> interface FastEthernet1/0/1
> no switchport
> ip address 11.1.1.5 255.255.255.0
> end
>
> see below
> Sw2#sh int f1/0/1
> FastEthernet1/0/1 is up, line protocol is up (connected)
> Hardware is Fast Ethernet, address is 001f.2791.dc83 (bia 001f.2791.dc83)
> Sw2#sh int f1/0/1 | i bia
> Hardware is Fast Ethernet, address is 001f.2791.dcc1 (bia 001f.2791.dcc1)
>
> when i plug the cable to sw2 port fa1/0/3 it show me the same mac address
> 001f.2791.dcc1 and then i checked the mac addess of a sw2 f1/0/3it shows me
> 001f.2791.dc83. but when i plug the cable back to the f1/0/1 it show me the
> 001f.2791.dcc1 the mac address is changing on the port.
>
> Sw2#sh int f1/0/1
> FastEthernet1/0/1 is up, line protocol is up (connected)
> Hardware is Fast Ethernet, address is 001f.2791.dc83 (bia 001f.2791.dc83)
> Sw2#sh int f1/0/1 | i bia
> Hardware is Fast Ethernet, address is 001f.2791.dcc1 (bia 001f.2791.dcc1)
>
> why this is happening ???? any idea
>
> "c3750-ipservicesk9-mz.122-50.SE1"
>
>
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Received on Mon Aug 15 2011 - 18:27:26 ART