01-03-2008 08:26 PM - edited 03-05-2019 08:16 PM
Hi everyone,
I got a Cisco 831 router running IOS 12.4. Physically there are 5 ports which are 1 WAN (E1) and 4 LAN (FE1, FE2, FE3, FE4).
When I "sh run", it shows up 7 interfaces. Besides the above 5 ports, there are E0 and E2. And my understanding is E0, E1, E2 are Layer 3 interfaces. FE1-FE4 are Layer 2 interfaces. And FE1-FE3 access E0, FE4 accesses E2.
My need is like this, in my LAN subnet(192.168.1.0/24), I want FE1-FE4 are in the same subnet. Say FE1 is connected a PC(192.168.1.1), FE2=192.168.1.2, FE3=192.168.1.3, FE4=192.168.1.4. E0 interface is configured as 192.168.1.5 for the router itself.
How can I make FE4 in the same LAN? I didn't find VLAN commands so I'm assuming 831 doesn't support VLAN, otherwise I would config VLAN for FE1-FE4.
Any suggestion is appreciated!
Solved! Go to Solution.
01-04-2008 09:30 PM
Just issue a shutdown in the e2 interface and don't supply it with any configuration.
Fas4 will work as normal.
NS
01-04-2008 02:51 PM
e2 with fe4 as physic is the "DMZ" Interface
which can have it's own IP-configuration but
shares the ~10MBit/s FDX channel to the CPU with the other 3 FE Ports.
Try to shutdown e2 or to say "no int e2"
and view the logging messages on console
or by show log (hopefully logging buffered
enabled)
Get a 871 or better 1812 :-)
01-04-2008 05:06 PM
It doesn't allow me to remove it.
Any way to remove this DMZ port and restore F4 as equal to F1-F3?
Thanks.
--- router output ---
R831(config)#no int e2
% Removal of physical interfaces is not permitted
01-04-2008 09:30 PM
Just issue a shutdown in the e2 interface and don't supply it with any configuration.
Fas4 will work as normal.
NS
01-05-2008 01:09 AM
Great, It works!
Thanks a lot!
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