Hi
Okay - now I think I understand it - thank you for all the replies.
Summary:
Shared interface with contexts in same subnet: Use unique
mac-address for each context (or
NAT classification).
Shared interface with contexts in different subnets
(sub-interfaces): No need for unique
mac-addresses because arp happens on different subnets.
Activ/Active failover - "mac-address auto" enable by default.
/Peter
If the contexts are in different subnets, then you don't need an
unique address as the
ARPs are not going to happen on the same subnet.
With regards
Kings
CCNA,CCSP,CCNP,CCIP,CCIE 35914 (Security)
On Fri, Sep 14, 2012 at 2:43 PM, "Peter Jørgensen"
[email protected]> wrote:
Hi
Have a doubt about this.....
I know that the packet classification is done in the
following order:
1. Classification based on destination MAC - require
unique MAC on each shared interface
2. Classification based on destination IP and NAT
If I have two context with a shared outside interface
and Enables NAT Control and
doesn't use overlapping subnets - is it correct assumed that I do not need
to activate
the "mac-address auto" or manual configure unique MAC addresses of the physical
interfaces - because NAT will classify packets?
I know that in real life - best practice is to always
enable mac-address auto when using
shared interfaces - but what is right in LAB Exam???
/Peter
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