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4506 convert / config layer 3?

We have a two 4506's doing layer 2 on single vlan.

Another vlan is required.  

We don't want to mess with the Wan router.  Prefer not to buy two new layer 3 switches.   

Is it just configuration for Vlan and routing, or is an upgrade needed?

Current view ....

Cisco Internetwork Operating System Software

IOS (tm) Catalyst 4000 L3 Switch Software (cat4000-I9S-M), Version 12.2(20)EW


Technical Support:

Copyright (c) 1986-2005 by cisco Systems, Inc.

Compiled Fri 29-Jul-05 18:09 by kellythw

Image text-base: 0x00000000, data-base: 0x011F8610

ROM: 12.2(20r)EW1

Dagobah Revision 226, Swamp Revision 34

System returned to ROM by reload

System restarted at 13:29:10 CST Sat Mar 3 2007

System image file is "bootflash:"

cisco WS-C4506 (MPC8245) processor (revision 10) with 262144K bytes of memory

Processor board ID FOX092603Q7

MPC8245 CPU at 266Mhz, Supervisor II+

Last reset from Reload

1 Virtual Ethernet/IEEE 802.3  interface(s)

192 FastEthernet/IEEE 802.3 interface(s)

2 Gigabit Ethernet/IEEE 802.3 interface(s)

511K bytes of non-volatile configuration memory. 


Re: 4506 convert / config layer 3?

Hmm..dont think anything is required on that !

Just create interface vlan x and interface vlan y SVI's and you should be happily doing intervlan chit chats..-:)


Re: 4506 convert / config layer 3?


No need to upgrade anything..

You can do the below activities

1.Configure one new L3 vlan for your new requirement.

2.Configure one more L3 vlan for your existing network and I hope currently router interface as your gateway.Just remove that ip address and assign that IP address to this new L3 vlan.

3.Configure new ip address for your router interface and configure proper routing.

4.Enable IP routing in your 4500 switches and add one default route towards the router interface.

5.You can configure HSRP in both of the switches to have a redundancy in your network.



Hall of Fame Super Gold

Re: 4506 convert / config layer 3?

Errr ... I don't think Yuk Ster can enable routing.  The Sup2+ is a layer 2 only card. 

Dot1Q and sub-interface has to be created on the router.

Re: 4506 convert / config layer 3?


Cisco Catalyst 4500 Series Supervisor Engine II-Plus will support the below L3 futures.

Layer 3 Features

•  Hardware-based IP Cisco Express Forwarding routing at 48 mpps

•  Static IP routing

•  Routing Information Protocol (RIP) and RIP2

• IGMP  v1, v2, and v3

• IGMP  filtering on access and trunk ports

• IP  Multicast routing protocols (PIM, SSM, and Distance Vector Multicast  Routing Protocol [DVMRP])

• Cisco  Group Multicast Protocol (GMP) server

• Full  Internet Control Message Protocol (ICMP) support

• ICMP  Router Discovery Protocol

• IPv6  software switched

• EIGRP  stub

• IP  unnumbered for SVI

• SVI  Autostate Exclude

For more information, just have a look into the below URL



Hall of Fame Super Gold

Re: 4506 convert / config layer 3?

Whoopsie!  Mea culpa.

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