Solved: Hey

Mark H · ‎01-19-2016

So we're finally replacing an old Cisco 2801 router with a fancy new ISR 4431. However we've been caught out, the old 2801 had access vlans assigned to physical interfaces and it seems this is a no-no on a 4431.

Is our only solution to put in a switch module?

Below is what we used to have.

interface FastEthernet0/3/0
 description FW
 switchport access vlan 202
 duplex full
 speed 100
!
interface FastEthernet0/3/1
 description FW
 switchport access vlan 202
 duplex full
 speed 100
!
interface Vlan202
 ip address 192.168.0.5 255.255.255.0
!

Mark Malone · ‎01-20-2016

Hey

so you probably had a hwic switching module in the 2801 , these 4431 are pure layer 3 you would need to add a module if supported to get layer 2 port access like that

Looking at this comparison model it says no to switch module but there not always accurate I would check with the supplier you got it from ask them are there l2 modules available for this switch , other option push the vlans back onto a layer 3 switch and route between switch and router or use old method router and stick setup with l2 switch

http://www.cisco.com/c/en/us/products/routers/4000-series-integrated-services-routers-isr/models-comparison.html

View solution in original post

Switchport Access Vlan on a ISR 4431