Cisco Cisco IOS Software Release 12.2(35)SE

IPv6 routing support (requires metro IP access image):

DHCP for IPv6 relay, client, server address assignment and prefix delegation 

IPv6 unicast routing capability for forwarding IPv6 traffic through configured interfaces using 
static routing, RIP, OSPF, or EIGRP 

IPv6 default router preference (DRP) for improving the ability of a host to select an appropriate 
router 

Although documented in the software configuration guide, HTTP(S) over IPv6 is not supported 
in this release.

IPv6 ACLs to be applied to interfaces to filter IPv6 traffic (requires metro IP access image). 

Bidirectional Forwarding Detection (BFD) Protocol to quickly detect forwarding-path failures for 
OSPF, IS-IS, BGP, EIGRP, or HSRP routing protocols.

REP configuration on edge ports connected to ports that do not support REP. 

Support for Embedded Event Manager Version 2.4.

Network Edge Access Topology (NEAT) with 802.1X switch supplicant, host authorization with 
CISP, and auto enablement to authenticate a switch outside a wiring closet as a supplicant to another 
switch.

CPU utilization threshold trap monitors CPU utilization.

RADIUS server load balancing to allow access and authentication requests to be distributed evenly 
across a server group. 

Support for the CISCO-ENTITY-SENSOR MIB and the CISCO-PORT-QOS-MIB

IP source guard in the metro base image (ME 3400) to restrict traffic on nonrouted interfaces by 
filtering traffic based on the DHCP snooping database and IP source bindings 

Dynamic ARP inspection in the metro base image (ME 3400) to prevent malicious attacks on the 
switch by not relaying invalid ARP requests and responses to other ports in the same VLAN 

 lists the minimum software release (after the first release) required to support the major features 

of the Cisco ME 3400E and ME 3400 switch. Features not listed are supported in all releases.

The first release for the Cisco ME3400E switch was 12.2(44)EY and it included all features through 
release 12.2(44)SE.