1921 Router w/4-PORT HWIC card

[crixis]

Is it possible to configure the HWIC ports as LAN ports? For example, i have the 1921 behind a consumer router so i know its a double NAT situation, its for a LAB, i want to be able to connect client devices on the 4 ports of the HWIC segregated from home network.

Is that possible? Do they need to be assigned IP addresses like a layer 3 port or can they be DHCP?

Thank you in advance

[Joseph W. Doherty]

Unless you HWIC is L3 Ethernet, you'll need to use SVI(s), and VLAN(s).

[crixis]

Can I configure 1 or 2 vlans or do they have to each have separate vlans? But no setup with DHCP and an IP helper similar to a router on a stick setup.

[Joseph W. Doherty · Accepted solution]

Have you configured L3 switches?  If so, it's pretty much like that.

I believe (?) the router's SVI will support DHCP and NAT.  However, you may find the SVIs don't offer all the features the built-in router ports do.

[crixis]

Ok thanks

I have very little experience with L3 switches.

Appreciate your time

[Joseph W. Doherty]

Ok, in Packet Tracer, I selected a 1941 (as it doesn't offer the 1921, and the 1941 is just the more "powerful" model.

I then installed a HWIC-4ESW in the first

         --- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: 
%LINK-5-CHANGED: Interface FastEthernet0/1/0, changed state to up

%LINK-5-CHANGED: Interface FastEthernet0/1/1, changed state to up

%LINK-5-CHANGED: Interface FastEthernet0/1/2, changed state to up

%LINK-5-CHANGED: Interface FastEthernet0/1/3, changed state to up


Press RETURN to get started!

model slot, and booted the router.

During boot up, we "see" the 4 module ports:

To use much like a router port, you assign a VLAN to one of those ports and then assign a SVI:

Router>en
Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int f0/1/0
Router(config-if)#sw
Router(config-if)#switchport access vlan 2
% Access VLAN does not exist. Creating vlan 2
Router(config-if)#int vlan 2
Router(config-if)#
%LINK-5-CHANGED: Interface Vlan2, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to up

Router(config-if)#ip address 192.168.1.1 255.255.255.0
Router(config-if)#end
Router#

interface FastEthernet0/1/0
 switchport access vlan 2
 switchport mode access
!
interface Vlan2
 mac-address 00d0.bc42.d701
 ip address 192.168.1.1 255.255.255.0

[crixis]

Joseph,

Thanks, that is helpful to see, and gives me a direction to go in, Appreciate that.

Best Regards.