cisco1811: mac addresses from vlan interfaces problem

What version of IOS is been used ?

Post output of show version

Did you try:

int fa2 no switchport exit

Cisco IOS Software, C181X Software (C181X-ADVIPSERVICESK9-M), Version

ROM: System Bootstrap, Version 12.3(8r)YH8, RELEASE SOFTWARE (fc2)

c1811-turaevo uptime is 4 days, 2 hours, 5 minutes System returned to ROM by power-on System image file is "flash:c181x-advipservicesk9-mz.124-6.T3.bin"

--------------- I'm not sure how no switchport helps? I try to change MAC on vlan interface. Well, anyway I tried 'no switchport' but it did not help. Just disconnect fa2 from vlan2.

-- Sem.

Perhaps can be acccomplished using HSRP

interface Vlan99 ip address 99.99.99.98 255.255.255.0 standby ip 99.99.99.99 standby 99 mac-address aaaa.aaaa.aaaa end

So it does!

#sh int vlan1 | inc rotocol|bia Vlan1 is up, line protocol is up Hardware is EtherSVI, address is 0019.2f48.xx60 (bia 0019.2f48.xx60) #sh int gi 0/0 | inc rotocol|bia GigabitEthernet0/0 is up, line protocol is up Hardware is BCM1125 Internal MAC, address is 0019.2f48.xx60 (bia

Thing is, this does not usually matter, it is normal for example for Sun workstations to use the same mac on all interfaces, there are millions out there.

Since a Cisco router will not normally let you put the same IP subnet on more than one interface the two interfaces never "see" each other.

You can also do this:-

interface FastEthernet1/5 description no switchport ip address xxx.xxx.98.65 255.255.255.224

In this config the ports get their own individual macs.

FastEthernet1/4 is up, line protocol is up Hardware is Fast Ethernet, address is 0018.1926.xxbe (bia

This is a NM-16ESW in a 3845.

Why do you think that this is something to worry about?

Great! Thanks! It works.

-- Sem.